CN119956788B - Fully assembled foundation pit supporting structure and supporting method thereof - Google Patents
Fully assembled foundation pit supporting structure and supporting method thereofInfo
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- CN119956788B CN119956788B CN202510354289.5A CN202510354289A CN119956788B CN 119956788 B CN119956788 B CN 119956788B CN 202510354289 A CN202510354289 A CN 202510354289A CN 119956788 B CN119956788 B CN 119956788B
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Abstract
本发明公开了一种全装配式基坑支护结构及其支护方法，所述支护结构包括：钢板桩，所述钢板桩围设在基坑的内周；沿所述钢板桩的内周间隔设置的多个L型牛腿，每个所述L型牛腿的竖板均可拆卸地连接在所述钢板桩的内侧，多个所述L型牛腿的横板均位于同一标高；多个钢围檩，多个所述钢围檩支撑在所述基坑每侧的多个所述L型牛腿的横板上并围设在所述钢板桩的内周；用于限位钢围檩的对撑以及角撑，所述对撑设置在相对两侧的两个所述钢围檩之间、且两端分别抵顶至相对两侧的两个所述钢围檩，所述角撑设置在所述基坑的每个转角处、且两端分别抵顶至相邻两侧的两个所述钢围檩，所述对撑和所述角撑均长度可调，通过设置所述支护结构提高了支护效果。
This invention discloses a fully prefabricated foundation pit support structure and its support method. The support structure includes: steel sheet piles surrounding the inner periphery of the foundation pit; multiple L-shaped brackets spaced apart along the inner periphery of the steel sheet piles, the vertical plate of each L-shaped bracket being detachably connected to the inner side of the steel sheet piles, and the horizontal plates of the multiple L-shaped brackets being located at the same elevation; multiple steel walers supported on the horizontal plates of the multiple L-shaped brackets on each side of the foundation pit and surrounding the inner periphery of the steel sheet piles; and bracing and corner bracing for limiting the steel walers. The bracing is located between two steel walers on opposite sides, with its ends abutting against the two steel walers on opposite sides. The corner bracing is located at each corner of the foundation pit, with its ends abutting against the two steel walers on adjacent sides. The lengths of the bracing and the corner bracing are adjustable. The support structure improves the support effect.
Description
Technical Field
The invention relates to the technical field of foundation pit support, in particular to a fully assembled foundation pit support structure and a support method thereof.
Background
For foundation pits with larger span or deeper span, foundation pit support is needed to keep foundation pit excavation and foundation pit stability of construction in the foundation pit, the existing foundation pit support generally adopts a mode of combining steel sheet piles with steel purlins and pit supports, namely the steel purlins are welded on the inner periphery of the steel sheet piles after the steel sheet piles are applied, and then the pit supports are welded between the steel purlins on the two opposite sides. The construction method needs to customize the support in the pit based on the size of the foundation pit, the practicability is poor, the all-welded connection form is difficult to disassemble and turn over, and in addition, the support in the pit only provides counter force when the foundation pit has relative inward collapse trend, so that the support effect is poor.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a fully assembled foundation pit supporting structure and a supporting method thereof, is convenient for the assembly, disassembly and turnover of foundation pit supporting, and improves the foundation pit supporting effect.
In order to achieve the above purpose, the technical scheme adopted by the invention is a fully assembled foundation pit supporting structure, comprising:
The steel sheet pile is arranged on the inner periphery of the foundation pit in a surrounding mode;
The steel sheet pile comprises a plurality of L-shaped brackets arranged at intervals along the inner periphery of the steel sheet pile, wherein the vertical plate of each L-shaped bracket is detachably connected to the inner side of the steel sheet pile, and the transverse plates of the plurality of L-shaped brackets are located at the same elevation and face away from the steel sheet pile;
the steel purlins are respectively supported on transverse plates of the L-shaped brackets at each side of the foundation pit and are arranged around the inner periphery of the steel sheet pile;
The steel purlin supporting device is used for limiting the steel purlins and comprises two steel purlins arranged on two opposite sides, two steel purlins are respectively supported on two opposite sides, the steel purlins are correspondingly supported on vertical plates corresponding to L-shaped brackets, the corner supports are arranged at each corner of a foundation pit, two steel purlins are respectively supported on two adjacent sides at two ends, the steel purlins are correspondingly supported on vertical plates corresponding to the L-shaped brackets, and the length of the steel purlins is adjustable.
The fully assembled foundation pit supporting structure is further improved in that the pair support and the corner brace comprise first I-steel, a first connecting plate and an end supporting box, wherein the first connecting plate is connected to the first end of the first I-steel and is used for being detachably connected to one of the steel enclosing purlins, the end supporting box is slidably sleeved at the second end of the first I-steel and is used for being detachably connected to the other steel enclosing purlin, and a limiting piece used for limiting the end supporting box is connected between the end supporting box and the first I-steel.
The invention discloses a fully assembled foundation pit supporting structure which is further improved in that an end bearing box comprises a C-shaped plate and a rib plate connected between two flange plates of the C-shaped plate, the rib plate is also connected with a web plate of the C-shaped plate, the web plate of the C-shaped plate is detachably connected to a steel purlin, the two flange plates of the C-shaped plate and the rib plate are hollow structures, the hollow parts of the two flange plates of the C-shaped plate are communicated with the hollow parts of the rib plate to form an I-shaped chute for the movable insertion of first I-shaped steel, a limiting piece comprises a limiting bolt, a first jack for the insertion of the limiting bolt is formed in the top flange plate of the C-shaped plate, and a plurality of second jacks for the selective insertion of the limiting bolt are formed in the top flange plate of the first I-shaped steel at intervals along the length direction.
The fully assembled foundation pit supporting structure is further improved in that the angle brace further comprises two second connecting plates, the two second connecting plates are hinged to the first connecting plates of the angle brace and the end bearing box respectively, and the two second connecting plates are detachably connected to the corresponding steel enclosing purlins respectively.
The fully assembled foundation pit supporting structure is further improved in that the steel purlin is a second I-shaped steel, a first flange plate of the steel purlin is abutted to a vertical plate of the L-shaped bracket in a limiting state of the steel purlin, a second flange plate is abutted by the pair of supports or the corner supports, a force transmission box is detachably connected to the steel purlin at the position corresponding to each pair of supports or the corner supports, and the force transmission box is placed on a web plate of the steel purlin and clamped between the first flange plate and the second flange plate.
The fully assembled foundation pit supporting structure is further improved in that a plug plate for filling a first gap between the steel purlin and the protruding portion of the steel sheet pile is detachably connected to the steel purlin, one side of the plug plate is connected with a first hook for hanging on the first flange plate, and the thickness of the plug plate is matched with the first gap.
The fully assembled foundation pit supporting structure is further improved in that a plug box for filling a second gap between the steel purlin and the concave part of the steel sheet pile is detachably connected to the steel purlin, and the thickness of the plug box is adjustable.
The fully assembled foundation pit supporting structure of the invention is further improved in that the plug box comprises:
A case;
the second hook is used for being hung on the first flange plate and is connected to one side of the box body;
The L-shaped plugboard is used for being inserted into the other side of the box body, a third plughole for being inserted into a transverse plate of the L-shaped plugboard is formed in the box body, and a vertical plate of the L-shaped plugboard extends upwards;
and a plurality of thick plates which are used for being selectively clamped between the vertical plate of the L-shaped plugboard and the box body so as to adjust the thickness of the plug box.
A fully assembled foundation pit supporting method comprises the following steps:
step 1, providing the fully assembled foundation pit supporting structure;
Step 2, outer Zhou Shida steel sheet piles at the design position of the foundation pit;
Step 3, excavating a first layer soil body of the foundation pit until the design and installation elevation of the steel purlin is lower than that of the steel purlin;
step 4, connecting the vertical plates of a plurality of L-shaped brackets to the inner periphery of the steel sheet pile at intervals, so that the transverse plates of the L-shaped brackets are positioned at the same elevation and are opposite to the steel sheet pile;
Step 5, supporting a plurality of steel purlins on transverse plates of a plurality of L-shaped brackets on each side of the foundation pit respectively;
step 6, adjusting the length of the opposite support, respectively propping the two ends of the opposite support against two steel purlins on the two opposite sides, and propping the corresponding steel purlins against the vertical plates of a plurality of L-shaped brackets;
Step 7, adjusting the length of the angle brace, respectively propping two ends of the angle brace against two steel purlins on two adjacent sides, and propping the corresponding steel purlins against the vertical plates of a plurality of L-shaped brackets;
and 8, continuously excavating the foundation pit until the bottom of the foundation pit is designed to be at the elevation.
Compared with the prior art, the invention has the advantages that:
1. All the structures are connected in a detachable way, so that the whole foundation pit support is convenient to install and detach.
2. The length of the pair of braces and the angle braces is adjusted to be suitable for foundation pits with various sizes.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a fully assembled foundation pit supporting structure according to the present invention in use.
Fig. 2 is a schematic structural view of an L-shaped bracket of the fully assembled foundation pit supporting structure of the present invention.
Fig. 3 is a detailed view of the construction of the fully assembled foundation pit supporting structure of the present invention.
Fig. 4 is a detailed view of the structure of the pair of supports of the fully assembled foundation pit supporting structure of the present invention.
Fig. 5 is a detailed view of the structure of the end-bearing box of the fully assembled foundation pit supporting structure of the present invention.
Fig. 6 is a schematic view illustrating the hinging of the second connection plate of the fully assembled foundation pit supporting structure according to the present invention.
Fig. 7 is a top view showing a connection state of the plug plates of the fully assembled foundation pit supporting structure of the present invention.
Fig. 8 is a front view showing the connection state of the plug box and the plug plate of the fully assembled foundation pit supporting structure of the present invention.
Fig. 9 is a top view showing a connection state of plug boxes of the fully assembled foundation pit supporting structure of the present invention.
Fig. 10 is a detailed view of the structure of the plug box of the fully assembled foundation pit supporting structure of the present invention.
Fig. 11 is a front view showing a connection state of the force transmission box of the fully assembled foundation pit supporting structure of the present invention.
In the figure, 1, a steel sheet pile, 2, a steel purlin, 3, a pair support, 301, a first I-shaped steel, 302, a first connecting plate, 303, an end bearing box, 3031, a C-shaped plate, 3032, a rib plate, 3033, an I-shaped chute, 3034, a limit bolt, 304, a baffle plate, 305, a second connecting plate, 306, a first lug plate, 307, a second lug plate, 308, a pin shaft, 4, a corner brace, 5, an L-shaped bracket, 6, a plug plate, 7, a plug box, 701, a box body, 702, a second hook, 703, an L-shaped plug plate, 704, a thick plate, 705, a plug rod, 706, a third plug hole and 8, a force transmission box.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
The fully assembled foundation pit supporting structure and the supporting method thereof are further described in detail below with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 11, a fully assembled foundation pit supporting structure includes:
Steel sheet piles 1, wherein the steel sheet piles 1 are arranged around the inner periphery of the foundation pit;
A plurality of L-shaped brackets 5 arranged at intervals along the inner periphery of the steel sheet pile 1, wherein the vertical plate of each L-shaped bracket 5 is detachably connected to the inner side of the steel sheet pile 1, and the transverse plates of the plurality of L-shaped brackets 5 are positioned at the same elevation and are opposite to the steel sheet pile 1;
a plurality of steel purlins 2, wherein the steel purlins 2 are respectively supported on transverse plates of a plurality of L-shaped brackets 5at each side of the foundation pit and are arranged around the inner periphery of the steel sheet pile 1;
The pair of supports 3 and the angle brace 4 are used for limiting the steel purlin 2, the pair of supports 3 are arranged between the two steel purlins 2 on two opposite sides, two ends of the steel purlin 2 are respectively propped against the two steel purlins 2 on two opposite sides, so that the corresponding steel purlin 2 is propped against a vertical plate corresponding to the L-shaped bracket 5, the angle brace 4 is arranged at each corner of the foundation pit, two ends of the angle brace 4 are respectively propped against the two steel purlins 2 on two adjacent sides, so that the corresponding steel purlins 2 are propped against a vertical plate corresponding to the L-shaped bracket 5, and the length of the pair of supports 3 and the angle brace 4 is adjustable.
Preferably, the pair of braces 3 and the gusset 4 each comprise a first I-beam 301, a first connecting plate 302 and an end-bearing box 303, wherein the first connecting plate 302 is connected to a first end of the first I-beam 301 and is used for being detachably connected to one of the steel purlins 2, the end-bearing box 303 is slidably sleeved on a second end of the first I-beam 301 and is used for being detachably connected to the other steel purlin 2, and a limiting member for limiting the end-bearing box 303 is connected between the end-bearing box 303 and the first I-beam 301.
Specifically, the first connecting plate 302 is connected with the corresponding steel purlin 2 through bolts.
The pair of braces 3 and the angle brace 4 are adjusted in length, so that the support is suitable for foundation pits with various sizes, and the practicability is improved.
Preferably, the end bearing box 303 includes a C-shaped plate 3031 and a rib plate 3032 connected between two flange plates of the C-shaped plate 3031, the rib plate 3032 is further connected with a web plate of the C-shaped plate 3031, the web plate of the C-shaped plate 3031 is detachably connected to the steel purlin 2, the two flange plates of the C-shaped plate 3031 and the rib plate 3032 are hollow structures, and the hollow parts of the two flange plates of the C-shaped plate 3031 are all communicated with the hollow parts of the rib plate 3032 to form an i-shaped chute 3033 for the movable insertion of the first i-steel 301, the limiting member includes a limiting plug 3034, a first insertion hole for the limiting plug 3034 to be inserted is formed in the top flange plate of the C-shaped plate 3031, and a plurality of second insertion holes for the limiting plug 3034 to be selectively inserted are formed in the top flange plate of the first i-steel 301 at intervals along the length direction.
Specifically, through holes are formed on the end surfaces of the two flange plates and the rib plate 3032 of the C-shaped plate 3031, and each through hole is communicated with a corresponding hollow part.
The first i-beam is slidably inserted into the i-shaped chute 3033 through holes formed in the two flange plates of the C-shaped plate 3031 and the end surfaces of the rib plate 3032.
Specifically, the web of the C-shaped plate 3031 is connected with the corresponding steel purlin 2 through bolts.
Specifically, the device further comprises a jack for adjusting the length of the pair of braces 3 or the angle braces 4 and applying prestress, a baffle 304 is connected to the first I-steel 301 at a position relatively close to the end bearing box 303, the baffle 304 is connected between two flange plates of the first I-steel 301, and a mounting bin for mounting the jack is formed between the baffle 304 and a web plate of the C-shaped plate 3031.
The jack is controlled to extend, so that the end bearing box 303 and the first I-shaped steel 301 are driven to slide back to back, the first I-shaped steel 301 and the end bearing box 303 are respectively propped against the corresponding steel purlin 2, the position of the end bearing box 303 is limited by the limiting plug 3034, the jack is removed, and opposite outward pushing force is generated at the two ends of the pair of supports 3 or the angle braces 4 at the moment, so that the foundation pit supporting effect is improved.
Preferably, the gusset 4 further comprises two second connection plates 305, the two second connection plates 305 being respectively hinged to the first connection plates 302 and the end-bearing boxes 303 of the gusset 4, the two second connection plates 305 being respectively detachably connected to the corresponding steel purlins 2.
Specifically, the second connection plate 305 is connected with the steel purlin 2 through bolts.
Specifically, the end-bearing box 303 or the first connecting plate 302 is connected with the corresponding second connecting plate 305 through a pin shaft 308, one side of the second connecting plate 305 is connected with a second ear plate 307, one side of the end-bearing box 303 or the first connecting plate 302 opposite to the first i-steel 301 is connected with two first ear plates 306 at intervals, a space for accommodating the second ear plate 307 is formed between the two first ear plates 306, and the two first ear plates 306 and the second ear plates 307 are provided with connecting holes for connecting the pin shaft 308.
Preferably, the steel purlin 2 is a second i-steel, in a limiting state of the steel purlin 2, a first flange plate of the steel purlin 2 is attached to a vertical plate of the L-shaped bracket 5, a second flange plate is provided for the pair of supports 3 or the angle brace 4 to abut against, a force transmission box 8 is detachably connected to the steel purlin 2 at a position corresponding to each pair of supports 3 or angle brace 4, and the force transmission box 8 is placed on a web plate of the steel purlin 2 and clamped between the first flange plate and the second flange plate.
By arranging the force transmission box 8, the force transmission effect of the steel purlin 2 is guaranteed, and meanwhile, the second flange plate is prevented from being bent by the pair of supports 3 or the angle brace 4, so that the force transmission and the follow-up turnover use are influenced.
Preferably, the steel purlin 2 is detachably connected with a plug plate 6 for filling a first gap between the steel purlin 2 and the protruding portion of the steel sheet pile 1, one side of the plug plate 6 is connected with a first hook for hanging on the first flange plate, and the thickness of the plug plate 6 is adapted to the first gap.
Specifically, the risers of the L-shaped brackets 5 are connected to the bosses of the steel sheet pile 1 by bolts.
Because not every protruding portion of the steel sheet pile 1 is connected with the L-shaped bracket 5, under the limit state of the steel enclosing purlin 2, the first gap is formed between the steel enclosing purlin 2 and the protruding portion which is not connected with the L-shaped bracket 5, and the plug board 6 is arranged to fill in the first gap, so that the contact area between the steel enclosing purlin 2 and the steel sheet pile 1 is increased, the force transmission area is increased, and the stability of a foundation pit is improved.
Preferably, the steel purlin 2 is detachably connected with a plug box 7 for filling a second gap between the steel purlin 2 and the concave part of the steel sheet pile 1, and the thickness of the plug box 7 is adjustable.
Through connecting stopper case 7 in order to fill in this second clearance between the concave part of this steel purlin 2 and this steel sheet pile 1, increased the area of contact of this steel purlin 2 and this steel sheet pile 1, and then increased the area of transmitting force, improved foundation ditch stability.
Preferably, the plug box 7 comprises:
A case 701;
The second hook 702 is used for being hung on the first flange plate, and the second hook 702 is connected to one side of the box 701;
the L-shaped plugboard 703 is inserted into the other side of the box 701, a third plughole 706 is formed in the box 701 for inserting a transverse plate of the L-shaped plugboard 703, and a vertical plate of the L-shaped plugboard 703 extends upwards;
A plurality of thickening plates 704 for selectively sandwiching between the risers of the L-shaped insert plate 703 and the box body 701 to adjust the thickness of the plug box 7.
By clamping a corresponding number of the thickening plates 704 between the risers of the L-shaped insert plate 703 and the box 701, the overall thickness of the plug box 7 is further adjusted, improving practicality.
Specifically, two inserting rods 705 for being inserted into the box 701 are further connected to the vertical plate of the L-shaped inserting plate 703, the box 701 is provided with a fourth inserting hole for the inserting rods 705 to be inserted into, the two inserting rods 705 are arranged at intervals along the horizontal direction, and the horizontal distance between the two inserting rods 705 is not smaller than the width of the thick adding plate 704.
By providing the insert bars 705, the connection stability of the L-shaped insert plate 703 is enhanced, and by defining the horizontal spacing between the two insert bars 705, interference with the thick plate 704 is avoided.
A fully assembled foundation pit supporting method comprises the following steps:
step 1, providing the fully assembled foundation pit supporting structure;
step 2, steel sheet piles 1 are applied to the periphery of the design position of the foundation pit;
Step 3, excavating a first layer soil body of the foundation pit until the design installation elevation of the steel purlin 2 is lower than that of the steel purlin;
step 4, connecting the vertical plates of a plurality of L-shaped brackets 5 to the inner periphery of the steel sheet pile 1 at intervals, so that the transverse plates of the L-shaped brackets 5 are positioned at the same elevation and are opposite to the steel sheet pile 1;
Step 5, respectively supporting a plurality of steel purlins 2 on transverse plates of a plurality of L-shaped brackets 5 on each side of the foundation pit;
step 6, adjusting the length of the pair of supports 3, respectively propping the two ends of the pair of supports 3 against two steel purlins 2 on the two opposite sides, and propping the corresponding steel purlins 2 against a plurality of vertical plates of the L-shaped bracket 5;
Step 7, adjusting the length of the angle brace 4, respectively propping two ends of the angle brace 4 against two steel purlins 2 on two adjacent sides, and propping the corresponding steel purlins 2 against a plurality of vertical plates of the L-shaped bracket 5;
and 8, continuously excavating the foundation pit until the bottom of the foundation pit is designed to be at the elevation.
It should be noted that, the structures, proportions, sizes and the like shown in the drawings attached to the present specification are used for understanding and reading only in conjunction with the disclosure of the present specification, and are not intended to limit the applicable limitations of the present invention, so that any modification of the structures, variation of proportions or adjustment of sizes of the structures, proportions and the like should not be construed as essential to the present invention, and should still fall within the scope of the disclosure of the present invention without affecting the efficacy and achievement of the present invention. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
The present invention is not limited to the above-mentioned embodiments, but is not limited to the above-mentioned embodiments, and any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical matters of the present invention can be made by those skilled in the art without departing from the scope of the present invention.
Claims (6)
1. A fully assembled foundation pit support structure, comprising:
The steel sheet pile is arranged on the inner periphery of the foundation pit in a surrounding mode;
The steel sheet pile comprises a plurality of L-shaped brackets arranged at intervals along the inner periphery of the steel sheet pile, wherein the vertical plate of each L-shaped bracket is detachably connected to the inner side of the steel sheet pile, and the transverse plates of the plurality of L-shaped brackets are located at the same elevation and face away from the steel sheet pile;
the steel purlins are respectively supported on transverse plates of the L-shaped brackets at each side of the foundation pit and are arranged around the inner periphery of the steel sheet pile;
The steel purlin supporting device comprises a steel purlin supporting device, a steel purlin supporting device and a supporting device, wherein the steel purlin supporting device is used for limiting the steel purlin supporting device and the supporting device, the steel purlin supporting device is arranged between two steel purlins on two opposite sides, two ends of the steel purlins are respectively supported to two steel purlins on two opposite sides, the steel purlins are correspondingly supported to vertical plates of the L-shaped bracket, the steel purlins are correspondingly supported to each corner of a foundation pit, two ends of the steel purlins are respectively supported to two steel purlins on two adjacent sides, the steel purlins are correspondingly supported to vertical plates of the L-shaped bracket, the lengths of the steel purlins and the supporting devices are respectively adjustable, and the supporting devices respectively comprise first I-shaped steel, a first connecting plate and an end bearing box, and the supporting boxes are arranged in the following manner: the first connecting plate is connected with the first end of the first I-steel and is used for being detachably connected with one of the steel purlins, the end bearing box is slidably sleeved at the second end of the first I-steel and is used for being detachably connected with the other steel purlin, a limiting piece used for limiting the end bearing box is connected between the end bearing box and the first I-steel, the end bearing box comprises a C-shaped plate and a rib plate connected between two flange plates of the C-shaped plate, the rib plate is also connected with a web plate of the C-shaped plate, the web plate of the C-shaped plate is detachably connected with the steel purlin, the two flange plates of the C-shaped plate and the rib plate are of hollow structures, hollow parts of the two flange plates of the C-shaped plate are communicated with the hollow parts of the rib plate to form an I-shaped sliding groove for the first I-shaped steel to be movably inserted, the limiting piece comprises a limiting plug pin for the first plug hole to be inserted in on the top flange plate of the C-shaped plate, the top flange plate of the first I-shaped steel is provided with a plurality of second insertion holes which are used for selectively inserting limiting bolts at intervals along the length direction, the steel purlin is a second I-shaped steel, the first flange plate of the steel purlin is abutted to the vertical plate of the L-shaped bracket in a limiting state of the steel purlin, the second flange plate is used for abutting the pair of supports or the angle support, and the position of the steel purlin corresponding to each pair of supports or the angle support is detachably connected with a force transmission box which is placed on the web plate of the steel purlin and clamped between the first flange plate and the second flange plate.
2. The fully assembled foundation pit supporting structure of claim 1, wherein the gusset further comprises two second connection plates, the two second connection plates being respectively hinged to the first connection plates of the gusset and to the end-carrying case, the two second connection plates being respectively detachably connected to the corresponding steel purlins.
3. The fully assembled foundation pit supporting structure according to claim 1, wherein a plug plate for filling a first gap between the steel purlin and the protruding portion of the steel sheet pile is detachably connected to the steel purlin, a first hook for hanging on the first flange plate is connected to one side of the plug plate, and the thickness of the plug plate is matched with the first gap.
4. The fully assembled foundation pit supporting structure of claim 1, wherein the steel purlin is detachably connected with a plug box for filling a second gap between the steel purlin and the concave part of the steel sheet pile, and the thickness of the plug box is adjustable.
5. The fully assembled foundation pit supporting structure of claim 4, wherein said plug box comprises:
A case;
the second hook is used for being hung on the first flange plate and is connected to one side of the box body;
The L-shaped plugboard is used for being inserted into the other side of the box body, a third plughole for being inserted into a transverse plate of the L-shaped plugboard is formed in the box body, and a vertical plate of the L-shaped plugboard extends upwards;
and a plurality of thick plates which are used for being selectively clamped between the vertical plate of the L-shaped plugboard and the box body so as to adjust the thickness of the plug box.
6. The fully assembled foundation pit supporting method is characterized by comprising the following steps of:
step 1, providing the fully assembled foundation pit supporting structure according to claim 1;
Step 2, outer Zhou Shida steel sheet piles at the design position of the foundation pit;
Step 3, excavating a first layer soil body of the foundation pit until the design and installation elevation of the steel purlin is lower than that of the steel purlin;
step 4, connecting the vertical plates of a plurality of L-shaped brackets to the inner periphery of the steel sheet pile at intervals, so that the transverse plates of the L-shaped brackets are positioned at the same elevation and are opposite to the steel sheet pile;
Step 5, supporting a plurality of steel purlins on transverse plates of a plurality of L-shaped brackets on each side of the foundation pit respectively;
step 6, adjusting the length of the opposite support, respectively propping the two ends of the opposite support against two steel purlins on the two opposite sides, and propping the corresponding steel purlins against the vertical plates of a plurality of L-shaped brackets;
Step 7, adjusting the length of the angle brace, respectively propping two ends of the angle brace against two steel purlins on two adjacent sides, and propping the corresponding steel purlins against the vertical plates of a plurality of L-shaped brackets;
and 8, continuously excavating the foundation pit until the bottom of the foundation pit is designed to be at the elevation.
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| CN202510354289.5A CN119956788B (en) | 2025-03-25 | 2025-03-25 | Fully assembled foundation pit supporting structure and supporting method thereof |
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| CN202510354289.5A CN119956788B (en) | 2025-03-25 | 2025-03-25 | Fully assembled foundation pit supporting structure and supporting method thereof |
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| CN119956788B true CN119956788B (en) | 2025-11-21 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111779000A (en) * | 2020-07-30 | 2020-10-16 | 中铁十局集团第四工程有限公司 | A kind of quick disassembly foundation pit support structure and construction method |
| CN115478541A (en) * | 2022-09-19 | 2022-12-16 | 中国路桥工程有限责任公司 | Full-assembly type large-span steel structure soft soil deep foundation pit supporting structure and construction method thereof |
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| CN108049412B (en) * | 2017-11-22 | 2019-11-26 | 东通岩土科技股份有限公司 | A kind of foundation pit fashioned iron inner support system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111779000A (en) * | 2020-07-30 | 2020-10-16 | 中铁十局集团第四工程有限公司 | A kind of quick disassembly foundation pit support structure and construction method |
| CN115478541A (en) * | 2022-09-19 | 2022-12-16 | 中国路桥工程有限责任公司 | Full-assembly type large-span steel structure soft soil deep foundation pit supporting structure and construction method thereof |
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