CN115655137A - A excavation depth monitoring devices for following synchronous excavation of foundation ditch crowd - Google Patents

Abstract

The invention provides an excavation depth monitoring device for synchronous excavation of a foundation pit group, which comprises a device body, wherein an upright post is arranged on the device body, a transverse plate is arranged on the upper half part of one side of the upright post, a moving assembly is arranged on the transverse plate and comprises a first motor, a first placing groove is formed in the bottom of the transverse plate, a second placing groove is formed in one side, close to the inner wall of the upright post, of the first placing groove, the first motor is fixed inside the second placing groove, a lead screw is fixed at the output end of the first motor, a first fixing rod is fixed at the other end of the lead screw, the other end of the first fixing rod extends into the transverse plate, the first fixing rod is rotatably connected with the transverse plate, a screw block is in threaded connection with the outer peripheral surface of the lead screw, the screw block is in sliding connection with the first placing groove, and an infrared distance detection part is fixed at the bottom of the screw block. According to the invention, the mobile assembly drives the infrared distance detection part to move, so that the depth of the foundation pit can be measured at multiple positions, construction supervision personnel can perform construction adjustment timely according to conditions, and the construction quality is improved.

Description

An excavation depth monitoring device for synchronous excavation away from foundation pit groups

technical field

The invention relates to the technical field of building construction measurement and monitoring equipment, in particular to an excavation depth monitoring device for synchronous excavation away from foundation pit groups.

Background technique

Foundation pit engineering is a system engineering integrating geological engineering, geotechnical engineering, structural engineering and geotechnical testing technology. Its main content: engineering survey, support structure design and construction, earthwork excavation and backfill, groundwater control, information construction and surrounding environmental protection, etc. The simplest and most economical way to construct a foundation pit is to excavate on a larger slope, but it is often limited by site conditions and the surrounding environment. Therefore, it is necessary to design a support system to ensure the smooth progress of the construction and better protect the surrounding environment.

For example, the Chinese patent with the patent number CN214663149U discloses a sand mining depth monitoring device in the Yellow River channel, including a sand mining depth monitoring device body, a fixed column, a fixing ring, and a connecting device; a fixed column is installed on one side of the sand mining depth monitoring device body , the fixed ring is sleeved on the body of the sand mining depth monitoring device, and the fixed ring is connected with the fixed column through the connecting device; firstly, a pit is laid at a suitable position, the fixed column is buried in the pit, and then the sand mining depth monitor The device body is connected with the fixed column, and then the fixed ring is installed on the body of the sand mining depth monitoring device, the upper half of the fixed ring is connected with the lower half of the fixed ring, and the first bolt is threaded to fix it, and the nut Tighten, and then connect the first installation ring and the second installation ring through a wire rope to strengthen the tension on the body of the sand mining depth monitoring device, and secondly, the second bolt is threaded through the third threaded hole to the threaded blind hole Inside, further strengthen the support for the body of the sand mining depth monitoring device.

The patent only emphasizes the support structure of the detection device, and its measurement points are also fixed, so multi-point measurement cannot be achieved. Under certain circumstances, the same device can only measure the depth of one position in the foundation pit, resulting in the measurement result Single, not conducive to construction personnel to adjust the construction situation in a timely manner according to the situation.

Contents of the invention

In order to solve the above problems, the present invention aims to propose an excavation depth monitoring device for synchronous excavation away from the foundation pit group, which drives the infrared distance detection part to move through the moving component, so that the depth of the foundation pit can be measured at multiple positions, which is beneficial to construction The supervisors made construction adjustments in a timely manner according to the situation, which improved the construction quality.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

An excavation depth monitoring device for synchronous excavation away from a foundation pit group, comprising a device body, the device body is provided with a column, and the upper half of one side of the column is provided with a horizontal plate, and the horizontal plate A moving assembly is provided, the moving assembly includes a first motor, a first placement slot is opened on the bottom of the horizontal plate, a second placement slot is opened on the side of the first placement slot close to the inner wall of the column, and the first motor is fixed in the second placement slot Inside, the output end of the first motor is fixed with a screw rod, the other end of the screw rod is fixed with a first fixed rod, the other end of the first fixed rod extends to the inside of the horizontal plate, and the first fixed rod is rotatably connected with the horizontal plate , the outer peripheral surface of the screw rod is threadedly connected with a screw block, the screw block is slidably connected with the first placement groove, and the bottom of the screw block is fixed with an infrared distance detection part.

Further, the device body is a base with wheels, the upright is fixed on the base, and the upright and the top of the base are arranged at 90 degrees.

Further, the base is also provided with a power supply unit and a signal transmission unit, the signal transmission unit sends the signal measured by the infrared distance detection unit to the control room monitoring equipment, the power supply unit and the infrared distance detection unit, the signal transmission unit and the first motor are electrically connected.

Further, an overturn assembly is provided between the column and the horizontal plate, the overturn assembly includes a second fixed rod, a third placement groove is vertically opened on one side of the upright column, and the second fixed rod is horizontally arranged in the third placement groove Inside, one end of the horizontal plate is provided with a rotating block, the second fixed rod passes through the rotating block, and the second fixed rod is rotatably connected with the rotating block, and the rotating block part is located inside the third placement groove, and the vertical section of the rotating block is semicircular Combining with the rectangle, an arc-shaped worm wheel is arranged on the arc-shaped surface of the rotating block, and the arc-shaped worm wheel part is located inside the third placement groove. The center of the arc-shaped worm wheel is located on the central axis of the first fixed rod. The power assembly drives the arc-shaped worm gear to move.

Further, the power assembly includes a worm, and the upper half of one side of the column is vertically provided with a fourth placement groove, the inside of the fourth placement groove is connected with the inside of the third placement groove, and the bottom of the inner wall of the fourth placement groove is fixed with a third The fixed rod, the worm is rotated and sleeved on the outer peripheral surface of the third fixed rod, the other end of the worm is fixed with the fourth fixed rod, one end of the fourth fixed rod extends to the outside of the column and is fixed with the first knob, the worm and the arc-shaped worm wheel are always Mesh.

Further, a limiting plate is horizontally provided on the upper half of one side of the column, the limiting plate is located above the second fixing rod, and the limiting plate is used to limit the movement angle of the horizontal plate.

Further, the column is also provided with a support assembly; the support assembly includes two support blocks, and two first sliding slots are horizontally opened symmetrically on both ends of the upper half of one side of the column, and the two first sliding slots are connected with the second sliding slot. The three placement slots and the fourth placement slot are not connected; the first guide rod is horizontally arranged in the two first slide slots, and the outer peripheral surface of the first guide rod is slidably provided with a sliding block, and the sliding block slides with the corresponding first slide slot One side of the sliding block is fixed to one end of the corresponding support block; a fifth fixing rod is fixed on one side of the inner wall of each first chute, and a screw is installed on the outer peripheral surface of the fifth fixing rod, and the other end of the screw is fixed with a second Six fixed rods, one end of the sixth fixed rod extends to the outside of the column and is fixed with a second knob, by turning the second knob, the support block can be driven to move under the horizontal plate in the working state to form a stressed support.

Further, the lower half of both sides of the inner wall of the third placement groove is provided with first limiting blocks; the opposite sides of the horizontal plate are fixed with second limiting blocks, when the horizontal plate completely enters the third placing groove , the second limiting block is in contact with the corresponding first limiting block, at this time the horizontal plate is in the vertical storage state, and the infrared distance detection part is not in contact with the inner wall of the third placement slot.

Further, a pull ring is provided on the top of the horizontal plate.

Beneficial effects: the invention is equipped with a moving component to drive the infrared distance detection part to move, so that the infrared distance detection part can obtain several sets of data within its range of motion, and feed back the data to the control room, so that the depth and depth of the foundation pit can be preliminarily obtained. Judging whether the bottom of the foundation pit is flat or not is beneficial for construction supervisors to make construction adjustments in a timely manner according to the situation and improve the construction quality;

The invention is provided with a motor to drive the screw to rotate to change the relative position of the screw block and the horizontal plate, and the screw block drives the infrared distance detection part to move, so as to achieve the depth measurement at different points inside the foundation pit and improve the measurement range;

The present invention is provided with a limiting plate. When the horizontal plate and the column are at 90 degrees, the top of the horizontal plate is in contact with the limiting plate. At this time, the laser emission direction in the infrared distance detection part is vertically downward, ensuring the depth measurement of the foundation pit. the accuracy of the data;

The present invention is provided with two support blocks, so that the two support blocks move to the bottom of the horizontal plate in the working transition state, and contact with the bottom of the horizontal plate, but because the support blocks are restricted by the corresponding first chute, the support blocks No contact with the first placement slot, the support block reduces the external force received by the worm and the arc-shaped worm wheel, and improves the service life of the worm and the arc-shaped worm wheel;

The present invention is provided with a first limit block and a second limit block to limit the depth of the horizontal plate entering the third placement groove, and at the same time avoid the contact between the infrared distance detection part and the inner wall of the third placement groove, further improving the infrared distance The service life of the detection part, in addition, the operator can easily control the horizontal plate through the pull ring, and avoid the arc-shaped worm gear and worm damage caused by the horizontal plate due to its own weight and other reasons.

Description of drawings

The drawings constituting a part of the present invention are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 is a schematic diagram of a half-section structure of an excavation depth monitoring device for synchronous excavation from a foundation pit group according to an embodiment of the present invention;

Figure 2 is a schematic diagram of the enlarged structure at A in Figure 1;

Fig. 3 is the schematic diagram of enlarged structure at B place in Fig. 1;

Figure 4 is a schematic diagram of the enlarged structure at C in Figure 1;

Fig. 5 is a schematic diagram of the structure of the front part of the column of the excavation depth monitoring device for synchronous excavation away from the foundation pit group according to the embodiment of the present invention (a support block is hidden);

FIG. 6 is a schematic structural diagram of the left view of FIG. 5 .

Detailed ways

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

The present invention will be described in detail below with reference to the accompanying drawings and examples.

Example 1

See Figures 1-6: An excavation depth monitoring device for synchronous excavation from a foundation pit group, including a device body 1, on which a column 12 is arranged, and the upper half of one side of the column 12 A horizontal plate 2 is provided, on which a moving assembly 3 is arranged, and the moving assembly 3 includes a first motor 31 , the bottom of the horizontal plate 2 is provided with a first placement slot 32 , and the first placement slot 32 is close to the column 12 One side of the inner wall is provided with a second placement groove 33, and the first motor 31 is fixed inside the second placement groove 33. The output end of the first motor 31 is fixed with a screw rod 34, and the other end of the screw rod 34 is fixed with a first fixed motor. Rod 35, the other end of the first fixed rod 35 extends to the inside of the horizontal plate 2, and the first fixed rod 35 is rotatably connected with the horizontal plate 2, and the outer peripheral surface of the screw rod 34 is threaded with a screw block 36, and the screw block 36 is connected to the horizontal plate 2. The first placement groove 32 is slidably connected, and the bottom of the screw block 36 is fixed with the infrared distance detection part 13 .

In this embodiment, the motor drives the screw to rotate to change the relative position of the screw block and the horizontal plate, and the screw block drives the infrared distance detection part to move, so as to achieve depth measurement at different points inside the foundation pit and improve the measurement range.

In a specific example, the device body 1 is a base 11 with wheels, the uprights 12 are fixed on the base 11 , and the uprights 12 and the top of the base 11 are arranged at 90 degrees.

The wheels in this embodiment are universal wheels with brakes, which are convenient for the operator to move the device body quickly.

In a specific example, the base 11 is also provided with a power supply part 15 and a signal transmission part 14, the signal transmission part 14 sends the signal measured by the infrared distance detection part 13 to the control room monitoring equipment, and the power supply part 15 is electrically connected to the infrared distance detecting unit 13 , the signal transmitting unit 14 and the first motor 31 .

In this embodiment, the moving component drives the infrared distance detection part to move, so that the infrared distance detection part can obtain several sets of data within its range of motion, and the data is fed back to the control room through the signal transmission part, and the depth of the foundation pit can be obtained initially. And judging whether the bottom of the foundation pit is flat, it is beneficial for the construction supervisors to make construction adjustments in time according to the situation, and the construction quality is improved.

In a specific example, an overturn assembly 4 is provided between the column 12 and the horizontal plate 2, the overturn assembly 4 includes a second fixing rod 41, and a third placement groove 42 is vertically opened on one side of the column 12, The second fixed rod 41 is horizontally arranged inside the third placement groove 42, and one end of the horizontal plate 2 is provided with a rotating block 44, the second fixed rod 41 passes through the rotating block 44, and the second fixed rod 41 is rotationally connected with the rotating block 44, The rotating block 44 is partly located inside the third placement groove 42. The vertical section of the rotating block 44 is a combination of a semicircle and a rectangle. The arc-shaped surface of the rotating block 44 is provided with an arc-shaped worm wheel 45, and the arc-shaped worm wheel 45 is partly located in the third place. Inside the placement groove 42, the center of circle of the arc-shaped worm wheel 45 is located on the central axis of the first fixed rod 41, and the power assembly 5 is arranged on the column 12, and the power assembly 5 drives the arc-shaped worm wheel 45 to move.

In this embodiment, the power assembly can drive the arc-shaped turbine to move, so that the horizontal plate can be rotated, and the horizontal plate can be flipped around the second fixed rod. In this way, when the equipment is stored, the horizontal plate can be completely positioned on the The third is placed inside the slot.

In a specific example, the power assembly 5 includes a worm 51, and the upper half of one side of the column 12 is vertically provided with a fourth placement groove 52, and the inside of the fourth placement groove 52 communicates with the inside of the third placement groove 42, The bottom of the inner wall of the fourth placement groove 52 is fixed with a third fixed rod 53, the worm 51 is rotatably sleeved on the outer peripheral surface of the third fixed rod 53, the other end of the worm 51 is fixed with a fourth fixed rod 54, and one end of the fourth fixed rod 54 extends A first knob 55 is fixed to the outside of the column 12 , and the worm 51 is always engaged with the arc-shaped worm wheel 45 .

In the specific implementation, this embodiment uses the cooperation between the worm and the arc-shaped turbine, and the first knob drives the worm to rotate, thereby driving the arc-shaped turbine to rotate, and finally achieves the purpose of changing the angle between the horizontal plate and the column.

In a specific example, the upper half of one side of the column 12 is horizontally provided with a limiting plate 6, the limiting plate 6 is located above the second fixing rod 41, and the limiting plate 6 is used to limit the movement of the horizontal plate 2 angle.

In this embodiment, through the limiting plate, when the horizontal plate and the column are at 90 degrees, the top of the horizontal plate is just in contact with the limiting plate. At this time, the laser emission direction in the infrared distance detection part is vertically downward, ensuring the foundation of the foundation pit. Accuracy of depth measurement data.

In a specific example, a support assembly 7 is also provided on the column 12; the support assembly 7 includes two support blocks 71, and two first sliding slots are horizontally opened symmetrically on the upper half of one side of the column 12 72, the two first chutes 72 are not connected with the third placement groove 42 and the fourth placement groove 52; the first guide rod 73 is horizontally arranged in the two first chute grooves 72, and the outer circumference of the first guide rod 73 A sliding block 74 is provided for sliding on the surface, and the sliding block 74 is slidably connected with the corresponding first chute 72, and one side of the sliding block 74 is fixed with one end of the corresponding support block 71; one side of the inner wall of each first chute 72 is fixed with a second Five fixed rods 75, the outer peripheral surface of the fifth fixed rod 75 is rotatably provided with a screw rod 76, the other end of the screw rod 76 is fixed with a sixth fixed rod 77, and one end of the sixth fixed rod 77 extends to the outside of the column 12 and is fixed with a second knob 78, by turning the second knob 78, the support block 71 can be driven to move under the horizontal plate 2 in the working state to form a force-bearing support.

In this embodiment, the two support blocks can be moved through the two second knobs, so that the two support blocks move to the bottom of the horizontal plate in the working state, and contact with the bottom of the horizontal plate, but because the support blocks receive the corresponding first slide Due to the limitation of the groove, the support block does not contact the first placement groove, the support block reduces the external force received by the worm screw and the arc-shaped worm wheel, and improves the service life of the worm screw and the arc-shaped worm wheel.

In a specific example, the lower half of the inner wall of the third placement groove 42 is provided with first limiting blocks 8; the opposite sides of the horizontal plate 2 are fixed with second limiting blocks 81, when When fully entering the third placement slot 42, the second stopper 81 is in contact with the corresponding first stopper 8. At this time, the horizontal plate 2 is in the vertical storage state, and the infrared distance detection part 13 is in contact with the third placement slot. 42 inner walls do not touch.

The first limit block and the second limit block in this embodiment limit the depth of the horizontal plate entering the third storage slot, avoiding the contact and collision between the infrared distance detection part and the inner wall of the third storage slot during storage, and further improving the The service life of the infrared distance detector.

In a specific example, a pull ring 43 is provided on the top of the horizontal plate 2 .

In this embodiment, the pull ring can facilitate the operator to control the horizontal plate, and avoid damage to the horizontal plate due to excessive pressure between the arc-shaped worm wheel and the worm due to its own weight and the like.

working principle:

The operator first moves the device body 1 to an appropriate position.

Next, one operator pulls the pull ring 43 and the other operator turns the first knob 55 . This action can also be done by the same person. The first knob 55 drives the fourth fixed rod 54 to rotate, the fourth fixed rod 54 drives the worm 51 to rotate, and the worm 51 drives the arc-shaped worm wheel 45 to rotate at the same time. The arc-shaped worm wheel 45 drives the rotating block 44 to rotate around the second fixed rod 41 .

Make the horizontal plate 2 move slowly, when the top of the horizontal plate 2 touches the limit plate 6, it shows that the angle between the horizontal plate 2 and the column 12 is 90 degrees at this moment. The operator releases the first knob 55 . But do not unclamp draw ring 43, the operator is assisted by draw ring 43, makes the state that the included angle between horizontal plate 2 and column 12 is 90 degrees. Make sure that most of the transverse plate 2 is above the foundation pit.

Simultaneously, the operator can move the second knob 78 simultaneously or separately, the second knob 78 drives the sixth fixed rod 77 to rotate, the sixth fixed rod 77 drives the screw rod 76 to rotate, and the screw rod 76 drives the sliding block 74 to move along the first screw rod 76 while rotating. A chute 72 moves in a linear direction. The sliding block 74 drives the corresponding supporting block 71 to move towards the direction where the horizontal plate 2 is located.

The top of the support block 71 is a plane. When the supporting block 71 starts to enter under the horizontal plate 2 , the bottom of the horizontal plate 2 is in contact with the top of the supporting block 71 . When the support block 71 cannot move, the operator stops turning the second knob 78 . At this time, the two support blocks 71 are not in contact with the first placement groove 32 , that is, the two support blocks 71 are not in contact with the screw block 36 all the time.

When the two supporting blocks 71 are completely located under the horizontal plate 2 , the operator releases the pull ring 43 .

The operator turns on the power, and the power turns on the first motor 31 , the signal sending part 14 and the infrared distance detecting part 13 at the same time. The first motor 31 contains a single-chip microcomputer. Under the instruction of the single-chip microcomputer, the first motor 31 drives the screw mandrel 34 to move for a certain distance and stops after a period of time, and then drives the screw mandrel 34 to rotate again. After the first motor 31 rotates forward several times, the first motor 31 starts to reverse. During this process, the screw block 36 evenly slides inside the first placement groove 32 . And the screw block 36 is not in contact with both sides of the inner wall of the first placing groove 32 .

The infrared distance detection part 13 sends the signal to the equipment in the control room through the signal transmission part 14, and the operator can know the height of different positions at the bottom of the foundation pit through the equipment, and adjust the construction situation in time according to the measured data.

When the work is completed, the operator turns off the power supply section 15 . The operator then pulls on the tab 43 . Then another operator reverses the second knob 78 so that after the two support blocks 71 are completely out of contact with the horizontal plate 2 , the operator stops turning the second knob 78 .

Next, the operator still pulls the pull ring 43 , and then another operator reverses the first knob 55 , and the first knob 55 drives the worm 51 to turn over. The operator who pulls the pull ring 43 holds the horizontal plate 2 and rotates slowly.

When the horizontal plate 2 completely enters the third placement groove 42 , the operator releases the pull ring 43 . At this time, the first limiting block 8 is in contact with the corresponding second limiting block 81 . And at this time, the infrared distance detection part 13 is located inside the third placement groove 42 , and the infrared distance detection part 13 is not in contact with the inner wall of the third placement groove 42 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (9)

1. an excavation depth monitoring device for excavating synchronously from foundation pit group, is characterized in that, comprises device body (1), and described device body (1) is provided with column (12), and described column ( 12) One side upper half is provided with horizontal plate (2), and described horizontal plate (2) is provided with moving assembly (3), and described moving assembly (3) comprises first motor (31), horizontal plate ( 2) The bottom is provided with a first placement slot (32), and the first placement slot (32) is provided with a second placement slot (33) near the inner wall of the column (12), and the first motor (31) is fixed on the second placement slot. Inside the groove (33), the output end of the first motor (31) is fixed with a screw mandrel (34), and the other end of the screw mandrel (34) is fixed with a first fixed rod (35), and the first fixed rod (35) The other end extends to the inside of the horizontal plate (2), and the first fixed rod (35) is rotationally connected with the horizontal plate (2), and the outer peripheral surface of the screw rod (34) is threaded with a screw block (36), and the screw block (36) is slidingly connected with the first placement groove (32), and the bottom of the screw block (36) is fixed with an infrared distance detection part (13). 2. the excavation depth monitoring device for excavating synchronously from foundation pit group according to claim 1, is characterized in that, described device body (1) is the base (11) that has wheel, and described column ( 12) be fixed on the base (11), and the column (12) and the top of the base (11) are set at 90 degrees. 3. The excavation depth monitoring device for synchronous excavation from the foundation pit group according to claim 2, characterized in that, the base (11) is also provided with a power supply unit (15) and a signal transmission unit (14 ), the signal transmission part (14) sends the signal measured by the infrared distance detection part (13) to the control room monitoring equipment, and the power supply part (15) is connected with the infrared distance detection part (13), the signal transmission part (14) and the first motor (31) are electrically connected. 4. The excavation depth monitoring device for synchronous excavation away from the foundation pit group according to claim 1, characterized in that, an overturn assembly (4) is arranged between the column (12) and the horizontal plate (2) , the flip assembly (4) includes a second fixed rod (41), one side of the column (12) is vertically provided with a third placement groove (42), and the second fixed rod (41) is horizontally arranged in the third placement groove (42) Inside, one end of the horizontal plate (2) is provided with a rotating block (44), the second fixed rod (41) passes through the rotating block (44), and the second fixed rod (41) and the rotating block (44) rotate connection, the rotating block (44) is partly located inside the third placement groove (42), the vertical section of the rotating block (44) is a combination of a semicircle and a rectangle, and an arc-shaped worm wheel is arranged on the arc-shaped surface of the rotating block (44). (45), the arc-shaped worm wheel (45) is partially located inside the third placement groove (42), the center of the arc-shaped worm wheel (45) is located on the central axis of the first fixed rod (41), and the power assembly is arranged on the column (12) (5), the power assembly (5) drives the arc-shaped worm gear (45) to move. 5. The excavation depth monitoring device for synchronous excavation from the foundation pit group according to claim 4, characterized in that, the power assembly (5) includes a worm (51), and on one side of the column (12) Half part is vertically provided with the 4th placement groove (52), and the inside of the 4th placement groove (52) is connected with the inside of the 3rd placement groove (42), and the bottom of the inner wall of the fourth placement groove (52) is fixed with the third fixed rod ( 53), the worm (51) is rotated and sleeved on the outer peripheral surface of the third fixed rod (53), the other end of the worm (51) is fixed with the fourth fixed rod (54), and one end of the fourth fixed rod (54) extends to the column The outer side of (12) is fixed with the first knob (55), and the worm screw (51) is always engaged with the arc worm wheel (45). 6. The excavation depth monitoring device for synchronous excavation from the foundation pit group according to claim 1, characterized in that, the upper half of one side of the column (12) is horizontally provided with a limiting plate (6), The limiting plate (6) is located above the second fixing rod (41), and the limiting plate (6) is used to limit the movement angle of the transverse plate (2). 7. The excavation depth monitoring device for synchronous excavation from foundation pit group according to claim 1, characterized in that, a support assembly (7) is also provided on the column (12); the support assembly ( 7) Including two support blocks (71), two first slide slots (72) are arranged symmetrically and horizontally on both ends of the upper half of the column (12), and the two first slide slots (72) and the third placement slot (42) and the 4th placement groove (52) are all disconnected; The first guide rod (73) is horizontally provided with in the two first chute (72), and the outer peripheral surface of the first guide rod (73) is slidably provided with Sliding block (74), sliding block (74) is slidably connected with corresponding first chute (72), and one side of sliding block (74) is fixed with an end of corresponding support block (71); Each first chute ( 72) The fifth fixed rod (75) is fixed on one side of the inner wall, the outer peripheral surface of the fifth fixed rod (75) is rotated to be provided with a screw rod (76), and the other end of the screw rod (76) is fixed with the sixth fixed rod (77). One end of six fixed rods (77) extends to the outside of column (12) and is fixed with second knob (78), can drive support block (71) to move to the horizontal plate ( 2) The lower part forms a force support. 8. The excavation depth monitoring device for synchronous excavation from the foundation pit group according to claim 1, characterized in that, the lower half of the inner wall of the third placing groove (42) is provided with first limiters. Block (8); the opposite sides of the horizontal plate (2) are fixed with a second limiting block (81), when the horizontal plate (2) completely entered the third placement groove (42) inside, the second limiting block (81) is in contact with the corresponding first limit block (8), and the horizontal plate (2) is in the vertical storage state at this time, and the infrared distance detection part (13) is not in contact with the inner wall of the third placement groove (42). 9. The excavation depth monitoring device for synchronous excavation away from the foundation pit group according to claim 1, characterized in that a pull ring (43) is arranged on the top of the horizontal plate (2).

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