JP2005194748A - Reinforced soil structure connection device - Google Patents

Abstract

An object of the present invention is to provide a connecting device that can easily and inexpensively connect a retaining wall and a bank reinforcing material or a bank reinforcing material in a reinforced soil structure using a mesh sheet-shaped reinforcing material.
A connecting device having a bottom portion formed in a substantially U shape in a direction in which earth pressure acts, and a plurality of locking portions provided at equal intervals in a direction perpendicular to the bottom portion and a pair of parallel horizontal lines, Inserting through the mesh of the retaining wall and embankment reinforcement formed in a grid pattern by the vertical member extending along the direction in which earth pressure acts and the horizontal member fixed to intersect the vertical member through the locking part of the connecting device The retaining pin is inserted into the locking portion of the connecting device, and the earth retaining wall and the embankment reinforcing material or the embankment reinforcing material are connected to each other.
[Selection] Figure 1

Description

  The present invention prevents the collapse of the embankment slope, and is used by embedding it in the embankment to form a stable slope. It is related with the connection apparatus which connects.

  For example, in the embankment method performed when a road or a railway is laid, a retaining wall is provided to prevent the slope from collapsing. The retaining wall is made of concrete panel walls, steel frame walls made of latticed reinforcing bars, etc., and embankment reinforcement is used to reinforce the embankment. In recent years, shaped reinforcing materials have been used in many cases.

FIG. 9 is a cross-sectional view of a connection structure that connects the panel wall body 13 and the embankment reinforcing material 20 according to the prior art. As a method for connecting the net-like embankment reinforcing material 20 to the panel wall 13, a connecting metal 42 and a connecting belt 43 are attached to a U-shaped embedded metal 41 embedded in the panel wall 13 and fixed with bolts. The connecting belt 43 is inserted through the mesh of the net-like embankment reinforcing material 20 in which the connecting end is first connected by the joint bar 45 to form the connecting insertion portion, and the circular opening at the tip of the connecting belt 43 is inserted. The panel wall 13 and the embankment reinforcement 20 are connected by inserting the single pipe 44 through the insertion portion of the embankment reinforcement connecting end. There are three such connection points per square meter with respect to the wall surface.
JP-A-6-185043 Kenho Ogawa “Types and Selection of Reinforced Earth Wall Methods” Science and Engineering Book 2000

  The problem to be solved is that it is composed of multiple members in the connection between the retaining wall and the embankment reinforcement, which requires detailed work for the connecting work, which is costly and requires less work time. You are forced to lose. In particular, when a road or railway as described above is laid, the slope must be reinforced over a wide area, which increases the number of days for the entire construction.

  It is an object of the present invention to provide a connecting device that can easily and inexpensively connect embankment reinforcing materials used for embedding in soil and reinforcing slopes.

  The connecting device for a reinforced earth structure according to the present invention is formed by a pair of horizontal lines parallel to a plurality of locking portions provided at equal intervals in a direction perpendicular to the bottom of the connecting device for a reinforced soil structure. The connection device fixed to the embankment wall and the embankment reinforcement formed in a lattice shape by a vertical member extending along the direction in which earth pressure acts and a horizontal member fixed so as to intersect the vertical member With the connection ends of the metal mesh overlapped vertically, the locking part of the connection device is inserted into each mesh of both sides, the locking pin is inserted into each locking part of the connection device, and the earth retaining wall and the embankment reinforcement By connecting, the earth retaining wall and the embankment reinforcing material can be easily connected at low cost.

  The connecting device of the present invention has the purpose of connecting a connecting wire mesh embedded in the retaining wall and having a connecting end protruding from the back of the retaining wall and the embankment reinforcing material embedded in the embankment, and the purpose of connecting the embankment reinforcing materials to each other. By using this, it was possible to easily connect with the minimum number of members.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 2 is a perspective view showing the internal structure of the reinforced soil structure 10 whose wall surface is the panel type 13. The reinforced earth structure 10 includes a retaining wall 11, a back bank 12, and an embankment reinforcing material 20. The reinforced earth structure 10 prevents a slope from collapsing and collapsing when laying a road or a railway, for example. Constructed to form a stable slope. Such a reinforced earth structure 10 integrates the earth retaining wall 11 and the embankment reinforcing material 20 so that the earth retaining wall 11 exerts a force that causes the earth retaining wall 11 to fall forward due to earth pressure acting on the earth retaining wall 11. The connection between the retaining wall 11 and the embankment reinforcement 20 is the most important because it is resisted by the pulling resistance.

  By using the connection device 30 invented for this connection, it has been realized that the connection can be made easily and quickly at a low cost. Moreover, it can apply also to the connection of the reinforcement | strengthening materials 20 of a net sheet shape by using this connection apparatus.

  FIG. 3 is a cross-sectional view showing a connecting portion between a concrete panel wall 13 and a mesh sheet-like embankment reinforcing material 20 according to an embodiment of the apparatus of the present invention. In general, when the earth retaining wall 11 is a wall panel 13, embankment reinforcements such as bearing anchors and steel strips have been conventionally used. However, in recent years, a low-cost construction method has been demanded. The case where the sheet-like embankment reinforcement 20 is used has increased.

  FIG. 4 is a plan view showing a state in which one end of the connecting wire mesh 21 is embedded in the panel wall 13 and protrudes in a mat shape from the back of the panel wall. The connecting wire mesh 21 protruding from the back surface of the panel wall 13 is formed in a lattice shape by a vertical member 26 extending along the direction in which earth pressure acts and a horizontal member 27 that crosses and is fixed to the vertical member. .

  FIG. 5 is a plan view showing a part of the mesh sheet-shaped embankment reinforcing material 20. The embankment reinforcing material 20 is formed of a longitudinal member 24 extending in one direction and a transverse member 25 extending in a direction different from the longitudinal member, has flexibility, and is made of, for example, polyethylene.

  FIG. 1 is a perspective view showing the connection device 30. It is an apparatus that only bends a welded wire mesh into a substantially U shape, and the surface is subjected to electrogalvanization or hot dip galvanization to prevent corrosion. The mesh sheet-shaped embankment reinforcing material 20 has the drawback that the vertical members 24 are closely spaced and the mesh is narrow. Since accuracy is important for inserting the locking portion 31 of the connecting device 30 into the mesh of the embankment reinforcing material 20, the connecting device 30 is a welded wire mesh.

Next, a connection method using the connection device 30 of the present invention will be described with reference to FIG.
The connection end portion of the net-like embankment reinforcing material 20 is superimposed on the connection end portion of the connecting wire mesh 21 protruding from the back surface of the built-up panel wall 13, and from below or above the mesh of each member. The locking portion 31 of the connection device 30 is inserted, and a rod-shaped locking pin 34 is inserted into the locking portion 31 from either one of the open ends of the connection device. In other words, the connection end portions of the connection device 30 and the locking pin 34 are connected to each other in a pinch shape.

The embodiment of FIG. 7 shows a cross-sectional view of a connecting portion using a retaining wall in which a latticed reinforcing bar grid is formed in a substantially L shape.
Such a retaining wall is frequently used in recent years because the wall surface can be greened, and since it is a retaining wall formed of the same lattice reinforcing bars as the connecting metal fitting 21 used in the above-described panel wall connecting structure, the mesh sheet-like embankment is used. The connection method with the reinforcing member 20 may be performed in the same manner.

The embodiment of FIG. 8 is a cross-sectional view showing a method for connecting the mesh sheet-like embankment reinforcements 20 to each other.
In the embankment reinforcement work associated with large-scale construction, a fixed-length roll is insufficient, and it is necessary to lay the reinforcing material to a predetermined design length while adding another roll. Since many connections between the reinforcing members 20 occur at this type of site, a method that facilitates connection is desired. As shown in FIG. 8, the connection end portions of the mesh sheet-shaped embankment reinforcing material 20 are overlapped with each other, and the engaging portion 31 of the connection device 30 is inserted into the mesh of the embankment reinforcing material 20 from below or above. The embankment reinforcements 20 can be connected to each other by inserting a rod-shaped locking pin 34 into the locking portion 31 from either one of the open ends of the connecting device.

  When using a net-sheet-like embankment reinforcement for embankment reinforcement of the reinforced earth structure, the connection between the embankment reinforcement and the earth retaining wall is indispensable. In order to make it connect, it is necessary to pass through some connection apparatus, and the connection apparatus of this invention is applicable. Furthermore, it can be applied to the connection between embankment reinforcements.

It is a perspective view which shows a connection apparatus. It is a perspective view which shows the internal structure of the reinforced earth structure whose wall surface is a panel type. It is sectional drawing which shows the connection of a panel wall and a embankment reinforcement. (Example 1) It is a top view which shows a panel wall and a connection metal-mesh. It is a top view which shows a part of net-sheet-like embankment reinforcement. It is a perspective view which shows a connection pin. It is sectional drawing which shows the connection of the retaining wall and embankment reinforcement of a grid | lattice-like reinforcing bar grid form. (Example 2) It is sectional drawing which shows the connection of embankment reinforcing materials. Example 3 It is sectional drawing which shows the connection of the conventional panel wall and embankment reinforcement.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Reinforced soil structure 11 Retaining wall 12 Back embankment 13 Panel wall 20 Reinforcing material in mesh sheet 21 Linked wire mesh 22 Reinforcing bar grid retaining wall 24 Reinforcing material vertical member 25 Reinforcing material horizontal member 26 Connecting metal mesh vertical member 27 Cross member of connecting wire mesh 28 Vertical member of grid reinforcing bar grid retaining wall 29 Horizontal member of grid reinforcing bar grid retaining wall 30 Connecting device 31 Locking portion of connecting device 32 Horizontal line of connecting device 34 Locking pin 41 U-shaped Buried hardware 42 Connection hardware 43 Connection belt 44 Single pipe pipe 45 Joint bar

Claims (1)

A connecting device for connecting the retaining wall of the reinforced earth structure and the embankment reinforcing material,
Direction in which earth pressure acts in a connecting device that is formed in a substantially U shape in the direction in which earth pressure acts and a plurality of locking portions provided at equal intervals in the direction perpendicular thereto and a pair of parallel horizontal lines In a state in which the embankment reinforcing material formed in a lattice shape by the vertical member extending along the vertical member and the horizontal member fixed to intersect with the vertical member and the connection end of the connecting wire mesh fixed to the earth retaining wall are vertically stacked The connection is characterized in that the locking portion of the connection device is inserted into each mesh of both sides, and the retaining wall and the embankment reinforcing material are connected by inserting the locking pin into each locking portion of the connection device. apparatus.

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