JP2005232906A - Lightweight embankment construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction method for embankment using an EPS method, which can be constructed more safely and is more excellent in construction.
SOLUTION The construction method for lightweight embankment is a construction method for constructing embankment by covering the foamed resin molded body (4) stacked as the embankment material, and in stacking the foamed resin molded body (4), The foamed resin molded bodies (4) are connected to each other using the first connector (1) and the second connector (2) having a specific shape. Adjacent foamed resin molded bodies (4a) are formed by piercing the first connector (1) so as to straddle the foamed resin molded bodies at the boundary portions of the foamed resin molded bodies (4a) arranged in the horizontal direction. Are connected, and the second connector (2) is pierced into the upper surface of the foamed resin molded body (4a) that has already been laid, and the upper foamed resin molded body (4b) is disposed on the second connector. Thus, the upper and lower foamed resin molded bodies (4a) and (4b) are connected to each other.
[Selection] Figure 1

Description

  The present invention relates to a method for constructing a lightweight embankment, and in particular, to a method for constructing a lightweight embankment by an EPS method using a foamed resin molded body as a material for embankment.

  EPS (Expanded Polystyrene Construction Method) is a lightweight foam resin for civil engineering work such as embankment of soft ground, road embankment, landslide embankment, wide embankment, steep incline embankment or various structures. This is a civil engineering method in which compacts (styrofoam blocks) are stacked as embankment materials and backfill materials. Lightweight embankment using the EPS method can greatly reduce the embankment load and prevent settlement and landslides. Furthermore, since the compressive force in the uniaxial direction is large and a clear shear region does not occur, it is possible to demonstrate excellent load resistance, and it is excellent in self-supporting property, and the lateral deformation is extremely small even when an overload is applied. Therefore, the back earth pressure can be greatly reduced. In addition, since it can be stacked manually, it can be easily and quickly constructed even in places where it is difficult to use large machines.

  In the construction of lightweight embankment, when stacking a large number of foamed resin molded products whose outer shape is formed in a rectangular parallelepiped, for example, in order to prevent displacement of the foamed resin molded products and improve workability, adjacent foamed resin molded products And the foaming resin moldings piled up and down are connected with a specific connector.

As the above-mentioned connecting tool, for example, a connecting tool that protrudes a plurality of teeth vertically by cutting out and bending the peripheral edge of a plate-like body has been proposed. In construction, adjacent foamed resin molded bodies are connected to each other by piercing the connecting tool so as to straddle the foamed resin molded body at the boundary portion between the foamed resin molded bodies arranged adjacent to each other. The upper and lower foamed resin molded bodies are connected to each other by stacking the upper foamed resin molded bodies on top of each other.
Japanese Patent Publication No. 3-4693

In addition, as another connecting tool, a connection comprising a rod-shaped main body (shaft portion) with a sharpened lower end and an operation head provided on the upper end of the main body and having a planar shape formed in a rod shape or an annular shape. In the construction of embankment using the connector, the above-mentioned connector is mounted from above on at least upper and lower two-stage foamed resin molded products while stacking a large number of foamed resin molded products in a staggered manner. The upper and lower foamed resin molded bodies are connected to each other by piercing them so as to penetrate through, and the left and right foamed resin molded bodies are connected as a whole.
JP 2000-220145 A

  By the way, in the construction of the embankment using a connecting tool in which a plurality of teeth are protruded vertically, each time a large number of foamed resin molded bodies are arranged, the connecting tool is attached to the upper surface of the foamed resin molded body. Since the teeth are in an upward state, there is a risk of damaging the body by stepping over or falling over during the work of stacking the upper foamed resin moldings. In addition, when other materials or tools hit the upward teeth of the connected connector, the teeth change direction, so the teeth must be corrected. Furthermore, when the foamed resin molded body is transported, the foamed resin molded body must be lifted and transported in order to prevent chipping or damage due to contact with the upward teeth of the connector, which is extremely inefficient.

  On the other hand, in the construction of embankment that sticks the rod-shaped connector into the upper and lower foamed resin moldings, the foamed resin moldings stacked in a staggered manner are not stable until the connector is inserted, and the foamed resin moldings are displaced or collapsed. Work efficiency is poor. In particular, since the foamed resin molded body in the horizontal direction is not connected until the upper foamed resin molded body is fixed, a considerably careful operation is required on the foamed resin molded body.

  The present invention has been made in view of the above circumstances, and the purpose thereof is an embankment construction method using the EPS method, which can be constructed more safely and is a lightweight embankment that is more excellent in workability. It is to provide a construction method.

  In stacking the foamed resin moldings, the present invention provides two types of couplers having specific shapes in the connecting operation of the foamed resin moldings arranged in the horizontal direction and the connecting operation of the foamed resin moldings stacked up and down. By using properly, the safety at the time of construction was improved and the workability was improved.

  That is, the present invention comprises two gist, and the first gist is a lightweight embankment construction method in which a foamed resin molded body is stacked to construct a bank-filling. A first connector formed by projecting at least two teeth on a surface side at a predetermined distance and a second connector formed by projecting teeth on both surfaces of the plate-like body are used. In addition, by connecting the first connecting tool so as to straddle these foamed resin molded bodies across the boundary portion of the foamed resin molded bodies arranged in the horizontal direction, the adjacent foamed resin molded bodies are connected to each other, and The upper and lower foamed resin moldings are connected to each other by piercing the second connector on the upper surface of the foamed resin molding that has already been laid and disposing the upper foamed resin molding on the second connector. Lightweight embankment characterized by It resides in the construction method.

  Moreover, the second gist of the present invention is a lightweight embankment construction method in which a foamed resin molded body is stacked to construct a bank, and at the time of stacking the foamed resin molded body, at least two teeth are provided on one surface side of the plate-shaped body. Foamed resin molded body using a first connector formed by projecting in a state of being separated by a predetermined distance, and a third connector formed by sharpening one end of a rod-shaped body, and arranged horizontally By adhering the first connector so as to straddle the foamed resin molded body at the boundary portion of the foamed resin, adjacent foamed resin molded bodies are connected to each other, and the upper stage is placed on the already-laid foamed resin molded body. The upper and lower foamed resin molded bodies are connected to each other by placing the side foamed resin molded body and inserting the third connector from the upper surface of the foamed resin molded body to the lower foamed resin molded body. Lightweight embankment construction method Exist for.

  According to the construction method of the lightweight embankment according to the present invention, when connecting the foamed resin molded bodies arranged in the horizontal direction, a connecting tool for connecting in the horizontal direction in which teeth protrude from only one surface side of the plate-like body is used. And, when connecting the foamed resin molded bodies stacked one above the other, since a connecting tool for connecting in the vertical direction with a shape different from the first connecting tool is used, it can be constructed more safely, and Excellent workability. Moreover, since the connecting tool used in the present invention is simpler in construction and easier to manufacture than the conventional connecting tool, the lightweight banking construction method according to the present invention is an economically advantageous method. .

  About the construction method of the lightweight banking which concerns on this invention, the embodiment is described based on drawing. FIG. 1 is a perspective view partially showing a method for connecting foamed resin molded bodies as a first embodiment in the method for constructing a lightweight embankment according to the present invention. FIG. 2 is a perspective view showing an example of a first connector used in the first and second modes. FIG. 3 is a perspective view showing an example of a second connector used in the first mode. Moreover, FIG. 4 is a perspective view which shows partially the connection method of the foamed resin molding as a 2nd aspect in the construction method of the lightweight embankment which concerns on this invention. FIG. 5 is a perspective view showing an example of a third connector used in the second mode. FIG. 6 is a perspective view showing an example of how to use the third connector. Furthermore, FIG. 7 is a partially broken perspective view showing an internal structure of a road embankment as an example of a light embankment constructed by the construction method of the present invention. In the description of the embodiment, the construction method of the lightweight embankment is simply abbreviated as “construction method”.

  The construction method of the present invention is a construction method in which foamed resin molded bodies are stacked to construct a bank fill, and is applied to various bank fills such as soft ground banking, road banking, landslide banking, widening banking, and steep slope banking. it can. In the construction method of the present invention, for example, in the case of road embankment as shown in FIG. 7, first, a concave portion (shallow hole) is excavated and formed on the ground, and then laying sand (6) is laid on the bottom thereof, A foamed resin molded body (4) is stacked thereon.

  Examples of the foamed resin molded body (4) include molded bodies made of foamed resins such as foamed polystyrene, foamed polyethylene, foamed polypropylene, foamed polyurethane, and foamed polyvinyl chloride. In particular, from the viewpoint of moldability, processability, and cost, a molded product of expanded polystyrene is preferable. The foamed resin molded body (4) is formed in a rectangular parallelepiped having an outer dimension of about 1000 × 2000 × 500 (height) mm, for example.

  In the present invention, when stacking the foamed resin molded bodies (4), the foamed resin molded bodies (4) are connected using a specific connector. And in this invention, the following two aspects, the 1st aspect and the 2nd aspect, are mentioned by the difference in the coupling tool to be used.

  First, the first aspect of the present invention will be described. In the construction method according to the first aspect, as shown in FIG. 1, when stacking the foamed resin molded bodies (4), the first connector (1) and A second connector (2) is used. FIG. 2 shows an embodiment of the first connector (1), and FIG. 3 shows an embodiment of the second connector (2). The first connector (1) and the second connector (2) can be resin-molded, but are usually manufactured by bending a metal plate.

  The first connector (1) is a member for connecting the foamed resin molded bodies (4) arranged in the horizontal direction to each other on the one surface side of the plate-like body (11) as shown in FIG. At least two teeth (12) are projected and formed with a predetermined distance apart. Specifically, for example, as shown in FIG. 2 (a), the first connector (1) is formed from one parallel side of the plate-like body (11) on one surface side of the plate-like body (in the drawing, Teeth (12), each having three teeth as a set, protrude from the lower side. Further, the first connector (1) is, for example, as shown in FIG. 2B, from one parallel side of the plate-like body (11) to one surface side of the plate-like body (lower side in the figure). Each has a tooth (12) protruding therefrom.

  On the other hand, the second connector (2) is a member for locking the foamed resin molded bodies (4) stacked one above the other, and as shown in FIG. 3, both sides of the plate-like body (21). The teeth (22) and (23) are provided in a protruding manner. Specifically, as shown in FIG. 3A, for example, the second connector (2) is provided on one surface side of the plate-like body (in the drawing, from two parallel sides of the plate-like body (21)). A pair of teeth (22) projecting from each other on the lower side) and the other two parallel sides of the plate-like body (11) on the other side of the plate-like body (upper side in the figure) The teeth (23), each having three teeth as a set, are projected. Further, as shown in FIG. 3B, for example, the second connector (2) is provided on one side of the plate-like body from the two parallel sides of the plate-like body (21) (the lower side in the drawing). Each tooth (22) protrudes from each other, and one tooth (23) protrudes from the other surface side (upper side in the drawing) of the plate-like body (21).

  In the first connector (1) and the second connector (2), the planar shapes of the plate-like bodies (11) and (21) are, for example, substantially rectangular with chamfered corners, and In the case of metal, the thickness of the plate-like bodies (11) and (21) is about 0.4 to 1 mm, the length of one side of the plate-like bodies (11) and (21) is about 50 to 100 mm, The length (protrusion height) of the teeth (12), (22) and (23) is about 20 to 40 mm.

  As shown in FIG. 1, in the construction method according to the first aspect, when the foamed resin molded bodies (4) are stacked, the foamed resin molded bodies (4a) arranged in the horizontal direction (the lower two illustrated in the figure) Adjacent foamed resin molded bodies (4a) are connected to each other by piercing the first connector (1) so as to straddle the foamed resin molded body (4a) at the boundary portion of the molded body. After arranging and connecting the required number of foamed resin molded bodies (4a) in the horizontal direction, the foamed resin molded body (4b) in the upper stage is arranged. When arranging the upper foamed resin molded body (4b), the second connector (2) is pierced into the upper surface of the lower foamed resin molded body (4a) already laid, and the second The upper and lower foamed resin molded bodies (4a) and (4b) are connected to each other by disposing the upper-stage foamed resin molded body (4b) on the connector.

  As described above, the operation in which the foamed resin molded bodies (4a) arranged in the horizontal direction are connected to each other by the first connector (1), and the foam resin molded bodies (4b) on the upper stage side are arranged in the vertical direction. By sequentially repeating the operation of connecting the foamed resin molded bodies (4a) and (4b) with the second connector (2), a large number of sections are formed so as to have a substantially trapezoidal shape as shown in FIG. The foamed resin moldings (4) are stacked. Then, after the foamed resin molded bodies (4) are stacked, the soil is covered from above the foamed resin molded bodies (4). In the case of the road embankment shown in FIG. 7, the covering soil (7) is laid around the stacked foamed resin molded body (4), and a concrete floor board, a roadbed, a surface layer, and the like are laid on the upper surface portion.

  According to the construction method of the present invention as described above, when connecting the foamed resin moldings (4a) arranged in the horizontal direction, the teeth (12) projecting in one direction only for connecting in the horizontal direction. Only when connecting the upper and lower foamed resin moldings (4a) and (4b) using the first connector (1), the teeth (22) and (23) protrude in the vertical direction with a specific shape. Since the second connection tool (2) for connection is used, there is no danger of stepping on the foot and the construction can be performed safely. In addition, since there is no problem that other materials or tools come into contact with the teeth (12) of the attached first connector (1) and the teeth are distorted, the workability is further improved. And since the 1st coupling tool (1) for horizontal direction connection is simple and easy to manufacture, the construction method of this invention is economically advantageous.

  Next, a second aspect of the present invention will be described. In the construction method according to the second aspect, as shown in FIG. 4, when the foamed resin molded bodies (4) are stacked, the first connector ( 1) and a third connector (3) are used. FIG. 5 shows an embodiment of the third connector (3). Such a third connector (3) can be resin-molded, but is usually manufactured by processing and molding a metal rod.

  The third connector (3) is a member for locking the foamed resin molded bodies (4a) and (4b) stacked one above the other. As shown in FIG. 5, one end of the rod-shaped body is sharpened. Formed and configured. Specifically, for example, as shown in FIG. 5 (a), the third connector (3) is formed by gradually reducing the diameter of the rod-like body at the distal end side (lower end side in the drawing) toward the distal end. Moreover, the 3rd coupling tool (3) forms the front-end | tip part (lower end part in a figure) of a rod-shaped body in the shape of an arrow as shown, for example in FIG.5 (b). The third connector (3) has a diameter of about 10 to 15 mm and a length of about 70 to 120 cm.

  As shown in FIG. 4, in the construction method according to the second aspect, when the foamed resin molded bodies (4) are stacked, the foamed resin molded bodies (4a) arranged in the horizontal direction (the two lower ones illustrated in the figure) Adjacent foamed resin molded bodies (4a) are connected to each other by piercing the first connector (1) so as to straddle the foamed resin molded body (4a) at the boundary portion of the molded body. Such an operation is similar to the above-described embodiment. After arranging and connecting the foamed resin molded bodies (4a) in the horizontal direction, the foamed resin molded body (4b) in the upper stage is arranged. When arranging the upper foamed resin molded body (4b), the upper foamed resin molded body (4b) is placed on the already installed lower foamed resin molded body (4a), and the foamed resin molded product is formed. The upper and lower foamed resin molded bodies (4a) and (4b) are connected to each other by inserting the third connector (3) from the upper surface of the body to the lower foamed resin molded body (4a).

  In addition, when the third connector (3) is inserted from the upper foamed resin molded body (4b), the holder (5) as shown in FIG. 6 can be used to make it easier and more accurate. The third connector (3) can be inserted. That is, the holder (5) shown in FIG. 6 is a cylindrical holder formed by attaching a support leg to the lower end of a pipe-shaped main body having a length of about 30 cm. In construction using such a holder, Place the holder (5) upright on the upper surface of the foamed resin molded body (4b) to be pierced with the third connector (3), and then place the third on the pipe-shaped body of the holder (5). After inserting the distal end side of the connector (3), the head (upper end) of the third connector (3) is hit with a mallet or the like, so that the lower foam resin molded body (4b) is The third connector (3) can be accurately inserted vertically into the foamed resin molded body (4a).

  As described above, also in the second aspect, the operation of connecting the foamed resin molded bodies (4a) arranged in the horizontal direction with the first connector (1) and the foamed resin molded body (4b) on the upper stage side. As shown in FIG. 7, a large number of foamed resin molded bodies are arranged as shown in FIG. (4) will be stacked. Then, after the foamed resin molded bodies (4) are stacked, the soil is covered in the same manner as described above.

  According to the construction method of the present invention as described above, when connecting the foamed resin moldings (4a) arranged in the horizontal direction, the teeth (12) projecting in one direction only for connecting in the horizontal direction. When connecting the upper and lower foamed resin molded bodies (4a) and (4b) using the first connector (1), the shape of the rod for connecting in the vertical direction is different from that of the first connector (1). The third connector (3) can be used safely, and when the rod-shaped third connector (3) is used, the horizontal foamed resin molded body (4a) can be used. Since they are connected to each other by the first connector (1), the foamed resin molded body (4) is not displaced or collapsed and can be efficiently constructed.

  As illustrated in the first and second aspects, in the construction method of the present invention, when stacking the foamed resin molded bodies (4), the connecting operation of the foamed resin molded bodies (4a) arranged in the horizontal direction, And in the connection operation of the foamed resin molded bodies (4a) and (4b) stacked up and down, the two types of connectors having specific shapes are selectively used, that is, the first connector (1) and the second connector. (2) Or by using the first connector (1) and the third connector (3) properly, the safety during construction can be improved and the workability can be improved.

It is a perspective view which shows partially the connection method of the foamed resin molding as a 1st aspect in the construction method of the lightweight embankment which concerns on this invention. It is a perspective view which shows the example of the 1st coupling tool used in the 1st and 2nd aspect. It is a perspective view which shows the example of the 2nd coupling tool used in a 1st aspect. It is a perspective view which shows partially the connection method of the foamed resin molding as a 2nd aspect in the construction method of the lightweight banking which concerns on this invention. It is a perspective view which shows the example of the 3rd coupling tool used in a 2nd aspect. It is a perspective view which shows an example of the usage method of a 3rd coupling tool. It is a partially broken perspective view which shows the internal structure of the road embankment as an example of the lightweight embankment constructed | assembled by the construction method of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1: 1st connection tool 11: Plate-shaped body 12: Teeth 2: 2nd connection tool 21: Plate-shaped body 22: Teeth 23: Tooth 3: 3rd connection tool 4: Foamed resin molding 5: Holder 6: Ground sand 7: Covered soil

Claims (2)

  A lightweight embankment construction method in which a foamed resin molded body is stacked to construct a bank, and when stacking the foamed resin molded body, at least two teeth are protruded from one side of the plate-like body with a predetermined distance therebetween. And a second connector formed by projecting teeth on both sides of the plate-like body, and the foamed resin is formed at the boundary portion of the foamed resin molded bodies arranged in the horizontal direction. By piercing the first connector so as to straddle the molded body, adjacent foamed resin molded bodies are connected to each other, and the second connector is pierced on the top surface of the already laid foamed resin molded body. The construction method of the lightweight embankment characterized by connecting the upper and lower foamed resin moldings by arrange | positioning the upper-stage foamed resin molding on the said 2nd coupling tool.   A lightweight embankment construction method in which a foamed resin molded body is stacked to construct a bank, and when stacking the foamed resin molded body, at least two teeth are protruded from one side of the plate-like body with a predetermined distance therebetween. And a third connector formed by sharpening one end of the rod-shaped body, and straddles the foamed resin molded body at the boundary portion of the foamed resin molded bodies arranged in the horizontal direction. By piercing the first connector so as to be connected, adjacent foamed resin molded bodies are connected to each other, and an upper foamed resin molded body is placed on the already laid foamed resin molded body. A method for constructing a lightweight embankment, wherein the upper and lower foamed resin molded bodies are connected to each other by inserting the third connector from the upper surface of the resin molded body to the lower foamed resin molded body.