JP5934013B2 - Scaffolding structure of reinforced earth wall and its installation jig - Google Patents

Description

  The present invention relates to a scaffold structure for a reinforced earth wall and its installation jig.

FIG. 6 shows a conventional example of a temporary scaffold installed on a reinforced earth wall.
The reinforcing earth wall includes at least a wall surface material a, a bank b provided on the back surface of the wall surface material a, and a reinforcing material c connected to the wall surface material a and disposed inside the bank b. It is a soil retaining structure.

When casting the cap concrete f on the top edge of the reinforced earth wall, it is necessary to install the temporary scaffolding d on the upper front surface of the reinforced earth wall and arrange the formwork e from the temporary scaffolding d.
This temporary scaffold d has a structure in which a scaffold plate d1 is provided on the upper part of the bracket d1, and the temporary scaffold is fixed to the reinforced soil wall by fixing the bracket d2 to the wall surface material a with bolts g.
And after removing the formwork e, the temporary scaffolding d is sequentially removed while removing the bolt g.

However, according to the conventional example described above, at least one of the following problems may occur.
(1) Limit of efficiency Since the bracket and the wall surface material are fixed with bolts, the removal of the scaffold requires the work of removing the bolts in sequence, and there is a limit to improving the efficiency.
(2) Limits on safety It is common to use an aerial work platform to remove the temporary scaffolding, but it is not possible to secure a work space to place an aerial work vehicle in front of the reinforced soil wall. It is necessary to remove another scaffold from the scaffold itself, or to remove the scaffold using a crane or a gondola from the top. Therefore, in conjunction with the above-described bolt removal work, a more secure method for removing the scaffold is desired.

  Therefore, this invention provides the scaffold structure of the reinforced earth wall excellent in efficiency and safety, and its installation jig.

The present invention, which has been made to solve the above problems, is a scaffold structure for constructing a temporary scaffold on the front surface of a wall surface material for constructing a reinforced soil wall, and penetrates through the wall of the wall material to the front of the wall material. placing an installation jig provided movably in the back, and the installation jig and latching or locking releasable temporary scaffold front side of the wall member, Tona is, the temporary scaffold the scaffold plate A bracket, and a connection plate attached to a portion of the bracket facing the front surface of the wall surface material, the connection plate having a hole that can be engaged with and disengaged from the installation jig at an upper portion thereof; Has a sliding portion that passes through the wall surface material and is movable to the front and back surfaces, and an elastic portion that is provided on the back surface side of the wall surface material and biases the sliding portion toward the back surface, The sliding part of the installation jig that protrudes forward of the wall surface material and the hole of the connecting plate are It can be characterized by being configured to, there is provided a scaffolding structure of the reinforced soil walls.
Also, in the invention, the connecting plate of the temporary scaffold thereunder, at the time of installation to the wall member may be configured to have a stepped surface forming a gap between the wall member.
Moreover, in the said invention, you may provide a buffer material in the said level | step difference surface.
Further, the present invention is an installation jig used for the scaffold structure of any one of the above-described reinforcing earth walls, the sliding portion penetrating the wall surface material and movable to the front and back surfaces, and the wall surface material of provided on the back side, have a, an elastic portion for urging said sliding portion and toward the rear, the engagement hole of the sliding portion the connecting plate installation jig is protruded forwardly of the wall member An installation jig characterized by being removable is provided.

According to the present invention, at least one of the effects described below can be obtained.
(1) Improvement of efficiency The hooked state can be released simply by lifting the scaffold from above, and the scaffold can be easily removed. Moreover, since the installation jig returns to the initial position, there is no need to manually return the installation jig.
(2) Improving safety When removing the scaffold, it is only necessary to lock the scaffold with a hook such as a crane and lift it upward to release the latching structure, so that the workers are directly involved in the removal of the scaffold. There is no need to do so and it is safe.
(3) Securing of unevenness By providing a gap between the scaffold and the wall material, it is possible to ensure followability to the unevenness caused by the design of the wall material.
(4) Ensuring installation property By providing a cushioning material between the scaffold and the wall surface material, it is possible to maintain a state in which the scaffold is securely fixed to the wall surface material while ensuring unevenness.
(5) Ensuring landscape characteristics After the scaffold is removed, the hook part that holds the scaffold automatically returns to the initial position on the wall surface material, so that the appearance of the wall surface material is not impaired.

Schematic which shows the Example of the installation jig of this invention. Schematic which shows the Example of the temporary scaffold of this invention. Schematic which shows 1st Example of the scaffold structure of this invention. Schematic which shows the reference example of the scaffold structure of this invention. Schematic which shows 2nd Example of the scaffold structure of this invention. Schematic which shows the conventional temporary scaffold.

  Embodiments of the present invention will be described below with reference to the drawings.

<1> Installation Jig The installation jig used for the scaffold structure of the present invention will be described with reference to FIG.
The installation jig A of the present invention is a member configured to be exposed in front of a wall surface material a that constructs a reinforced earth wall.
The installation jig A of the present invention is roughly divided into a sliding portion 1 that penetrates the wall surface material a and is movable (advanced / retracted) to the front and back surfaces, and is provided on the back surface side of the wall surface material a. And at least the elastic portion 2 that urges the back toward the back.

(1) Sliding part The sliding part 1 is a member for exposing a part of the sliding part 1 to the front of the wall surface material a.
The sliding part 1 can be comprised by the volt | bolt part 12 which consists of the volt | bolt 11 inserted in the through-hole a1 which penetrates the wall surface material a, and the plate attached to the rear end of the volt | bolt 11. FIG.
With the above configuration, the bolt 11 can slide through the through hole a1 in the wall surface material a within the range of the head portion of the bolt 11 and the flange portion 12.

(2) Elastic part The elastic part 2 is a member for urging the sliding part 1 in the back direction.
The elastic part 2 is installed on the back side of the wall surface material a.
The elastic part 2 is a member having an elastic force such as rubber or a spring, and a spring 21 is used in this embodiment.
One end of the elastic part 2 is configured to be in contact with the back surface of the wall surface material a, and the other end is configured to be in contact with the sliding part 1 (the flange part 12 in this example).

(3) Function By adopting such a configuration, in the initial state, the sliding portion 1 exhibits a state of being urged toward the back side of the wall surface material a by the elastic force of the elastic portion (see FIG. 1 (a)).
And when the collar part 12 is pushed in to the wall surface material a side, the elastic part 2 will be in the state compressed between the wall material a and the collar part 12, and the head of the sliding part 1 will be the front surface of the wall material a. It will be in the state protruded to the side (FIG.1 (b)). This protruding portion becomes the latching margin 3.

<2> Temporary scaffold The temporary scaffold used for the scaffold structure of this invention is demonstrated referring FIG.
The temporary scaffold B of the present invention is a member for constituting a coupling mechanism in cooperation with the installation jig A.
In this embodiment, the temporary scaffold B is composed of the bracket 4, a scaffold plate 5 provided above the bracket 4, and a connecting plate 6 provided on the front surface of the bracket 4 (FIG. 2A).
Since the bracket 4 and the scaffolding plate 5 have a well-known structure, detailed description is omitted.

(1) Connecting plate The connecting plate 6 is a member for connecting with the sliding part 1 of the installation jig A.
In this embodiment, since the sliding part 1 is provided with the bolt 11 as the latching side, the coupling plate 6 is provided with the mechanism on the latching side.

The connecting plate 6 includes an insertion hole 61 for inserting the bolt 11, a sliding groove 62 provided in communication above the insertion portion 61, and a fixing hole 63 for fixing the bolt 11 ( FIG. 2 (b)).
The insertion hole 61 has a shape larger than the cross-sectional shape of the head of the bolt 11. The sliding groove 62 has a shape slightly larger than the cross-sectional shape of the threaded portion of the bolt 11. The fixing hole 63 is larger than the cross-sectional shape of the threaded portion of the bolt 11 and smaller than the cross-sectional shape of the head of the bolt 11.

(2) Stepped surface In the temporary scaffold according to the present invention, a stepped surface 64 for forming a gap 65 between the wall surface material a and the wall surface material a may be formed when the wall surface material a is hooked. Good (FIG. 2 (a)).
In forming the stepped surface 64, there is a method in which a part of the connecting plate 6 is offset to the rear side of the temporary scaffold B.
The gap 65 formed between the stepped surface 64 and the wall surface material a can absorb unevenness due to the design of the front surface of the wall surface material a (e.g., a hanger, a crushed stone, and a stripe).

(3) Buffer material Further, a buffer material 66 corresponding to the thickness of the gap 65 may be appropriately disposed on a part of the stepped surface 64 (FIG. 2A).
As the buffer material 66, a known member such as wood can be used.
According to the buffer material 66, it is possible to prevent damage to the wall surface material a due to contact with the temporary scaffold B, and to improve stability after installation by increasing the ground contact area between the temporary scaffold B and the wall surface material a. Can contribute.

<3> Usage Method A usage method of the installation jig A and the temporary scaffold B of the present invention will be described with reference to FIG.
(1) At the time of installation As a premise, the temporary scaffold B is installed after the wall surface material a for installing the temporary scaffold B is mounted and until the embankment b is completely formed on the back surface of the wall surface material a. There is a need to do.
First, the head 3 of the bolt 11 of the sliding part 1 of the installation jig A is projected to the front side of the wall surface material a to secure the latching margin 3. As a method of projecting the bolt 11, there is a method of pushing the flange portion 12 on the back surface of the wall surface material a.

  A separate cover 7 is provided around the installation jig A on the back side of the wall surface material a from which the bolt 11 is projected. This is to prevent the problem that the earth filled up interferes with the rear end of the sliding portion 1 and the sliding portion 1 does not return to the initial position.

The temporary scaffold B is lifted by a crane in the vicinity of the bolt 11 with the bolt 11 protruding. Then, the bolt 11 is inserted into the insertion hole 61 provided in the connection plate 6 of the temporary scaffold B.
When the temporary scaffold B is pushed downward from this state, the bolt 11 is slid into the fixing hole 63 via the sliding groove 62 and is hooked, resulting in the state of FIG. 3 (FIG. 3).

(2) At the time of removal When removing the temporary scaffold B, the temporary scaffold B is lifted upward with a crane, and only the operation of pulling back the temporary scaffold B backward after the bolt 11 reaches the position of the insertion hole 61 is achieved. It is released and can be removed.
Since the bolt 11 is urged toward the back surface of the wall surface material a by the elastic portion, the bolt 11 automatically returns to the initial position.

A reference example of the scaffold structure will be described with reference to FIG.
In this scaffold structure, the connecting mechanism of the installation jig A and the temporary scaffold B may be interchanged.
That is, the installation jig A can be the hooked side, and the temporary scaffold B can be the hooking side.
At this time, the sliding member 1 in the installation jig A can use the flat plate member 8 provided with the insertion hole 81 at the tip.
The temporary scaffold B is provided with a hook 9 that can be inserted through the insertion hole 81.
Even if it is the said structure, there is no big difference in the removal | desorption method of the temporary scaffold B. FIG.

A third embodiment of the scaffold structure of the present invention will be described with reference to FIG.
In the scaffold structure of the present invention, the recess a2 can be provided on the front side of the through hole a1 of the wall material a.
According to the said structure, since the head of the sliding part 1 which comprises the installation jig | tool A is hidden in the recessed part a2 without protruding from the front surface of the wall surface material a in an initial state, it is excellent in scenery property.

a Wall material a1 Through-hole a2 Recess b Filling c Reinforcement material d Temporary scaffolding e Formwork f Shade concrete A Installation jig 1 Sliding part 11 Bolt 12 Rigid part 2 Elastic part 3 Suspension B Temporary scaffolding 4 Bracket 5 Scaffolding plate 6 connecting plate 61 insertion hole 62 sliding groove 63 fixing hole 64 step surface 65 gap 66 cushioning material 7 cover 8 flat plate member 81 insertion hole 9 hook

Claims (4)

A scaffold structure for constructing a temporary scaffold on the front surface of a wall material for constructing a reinforced earth wall,
An installation jig that penetrates the housing of the wall surface material and is provided movably on the front and back surfaces of the wall surface material ;
And the installation jig and latching or locking releasable temporary scaffold front side of the wall member, Ri Tona,
The temporary scaffold is a bracket for placing a scaffold plate,
A connecting plate attached to a portion of the bracket facing the front surface of the wall surface material;
The connecting plate has a hole in the upper part thereof that can be detached from the installation jig,
The installation jig penetrates the wall surface material and is freely movable to the front and back surfaces, and
Provided on the back side of the wall material, and having an elastic part for biasing the sliding part in the back direction,
The slide of the connecting plate is configured to be detachable from the sliding portion of the installation jig that protrudes forward of the wall material and the hole of the connecting plate .
Scaffolding structure of reinforced earth wall. The connecting plate the lower portion thereof of said temporary scaffold, upon installation into the wall material, characterized by having a step surface forming a gap between the wall member, the reinforced soil wall according to claim 1 Scaffold structure. The scaffold structure for reinforcing earth wall according to claim 2 , wherein a buffer material is provided on the step surface. An installation jig used for the scaffold structure of the reinforced earth wall according to any one of claims 1 to 3 ,
A sliding portion that penetrates the wall surface material and is movable to the front and back surfaces;
Provided on the back side of the wall member, have a, an elastic portion for urging said sliding portion and toward the rear,
The sliding portion of the installation jig that protrudes forward of the wall surface material is detachable from the hole of the connecting plate ,
Installation jig.

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