JPH05187030A - Gravity-type retaining wall and manufacture thereof - Google Patents

Abstract

PURPOSE:To improve workability, and to enhance the whole rigidity by engaging each lower edge with projections on a sleeper material and placing concrete between a front wall and a rear wall held and juxtaposed by a strut member and a tension member. CONSTITUTION:Sleeper materials 1 having positioning projections 2-5 at the front ends and rear ends of top faces are arranged in parallel on the same surface in a flat surface, on which stone 6 is paced and tamped. A rear wall 10 composed of a concrete board, in which reinforcements are incorporated, is hung down, the lower edge of the rear wall is engaged with the front surfaces of the rear-end projections 4, 5 of the sleeper materials 1, and strut members 14 are disposed among the rear wall 10 and the sleeper materials 1 and the rear wall 10 is held at a forward inclined attitude. A front wall 9, in which reinforcements are incorporated, is hung down, the lower edge of the front wall is engaged with the rear surfaces of the front-end projections 2, 3 of the sleeper materials 1, and tension members 21 are arranged between the front wall 9 and the sleeper members 1 and the front wall 9 is held at an approximately vertical attitude. Another front wall and rear wall are installed to other sleeper materials, and concrete is placed in spaces 34 between each front and rear wall 9, 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gravity type retaining wall and its manufacturing method.

[0002]

2. Description of the Related Art Generally, when making a road around a mountain on a slope of a mountain, a gravity retaining wall that receives earth pressure from the mountain is provided on the mountain side of the road. Where
First, floor laying, footing placement (finishing the surface flat with concrete), marking for positioning on it, assembling scaffolding support, and using a support etc. to form the formwork with a plywood board Assembling, confirming the street (dimensional accuracy), reinforcing the inside with reinforcing bars, angle materials, etc., placing concrete, curing, dismantling the formwork, dismantling the support work, and the post-wiring procedure. I was trying. However, in the conventional method, scaffolding support assembly, formwork assembly, formwork dismantling, supportwork disassembly, etc. require the skill and a lot of labor of a professional profession, which not only prolongs the construction period but also increases the cost. Moreover, it is not possible to form a pattern on the surface of the retaining wall, and in order to increase the strength near the surface of the retaining wall and increase the rigidity of the whole, it takes special labor to assemble the reinforcing bar, which makes it difficult to make.

[0003]

SUMMARY OF THE INVENTION The first object of the present invention is to make it easy to form a pattern on the surface and to increase the strength in the vicinity of the surface to significantly increase the overall rigidity. A second aspect of the present invention aims to enable the gravity type retaining wall according to the first aspect to be manufactured at low cost in a short period of time without requiring skill.

[0004]

According to a first aspect of the present invention, there are provided a concrete pillow member having built-in reinforcing bars, which has positioning protrusions at front and rear ends of an upper surface and is arranged in parallel on one plane at a distance, and at least two pillow members. Attached between the pillow and the rear wall so as to support the rear wall in a tilted position and the rear wall made of concrete plate with built-in reinforcing bars that is inclined forward as the lower edge engages with the front surface of the rear end protrusion. Position of the front wall with respect to the rear wall and the front wall composed of the reinforcement and the front plate of the pillow, the lower edge of which engages with the rear surface of the front end of the pillow, and the concrete plate with built-in reinforcing bars that is inclined rearward as it goes vertically or upward It is a gravity-type retaining wall made of concrete that is placed between the front and rear walls and a tension material that is attached between the front and rear walls so as to keep the above. A second aspect of the invention is to arrange pillows having positioning protrusions at the front and rear ends of the upper surface in parallel on the same flat surface where stones are laid, and to hang down the rear wall made of concrete plate with built-in reinforcing bars. Incline the rear wall by attaching a tension member between the pillow and the rear wall with the edges engaging the front surfaces of the rear end projections of at least two pillows and holding the posture inclined forward as it goes upward. Hold the posture, then suspend the front wall made of concrete plate with built-in reinforcing bars, and hold the posture in which the lower edge engages with the rear surface of the front end protrusion of the pillow and tilts slightly backward as it goes vertically or upward. Install a tension member between the rear wall and the front wall to maintain the posture of the front wall, and place the front wall and the rear wall different from the above front and rear walls on the pillow other than the above pillow. Keep them in the same plane and attach different tensioning and tensioning materials to each other and pour concrete between the front and rear walls. It is a manufacturing method of gravity retaining wall to be.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 1 of FIG. 1 is a concrete pillow material with a built-in reinforcing bar and is provided with two protrusions 2 and 3 at the front end portion (left side of FIG. 1) of the upper surface and two protrusions 4 and 5 at the rear end portion. , Are placed parallel to each other on a flat surface (the surface on which the gravity type retaining wall 7 is installed) obtained by laying stones 6 and rolling it flatly. 9, 10
Is a front wall and a rear wall made of precast concrete plates with built-in reinforcing bars, each of which rides on at least two concrete pillows 1, and the lower front edge of the front wall 9 is a front end projection 2
The rear surface of the rear wall 10 is engaged with the front surface of the rear end projection 5. Three insert nuts 11 (Fig. 2) are embedded between the protrusions 3 and 4 of the concrete pillow material 1 and fixed to the internal reinforcing bar 15 by welding. The screw portion 13 is screwed, and the lower end portion of the tension member 14 (angle member or rebar) is fixed to the rod 12 by welding. The upper end of the strut 14 is fixed by welding to an anchor 16 that is made of an angle member or a U-shaped rebar that protrudes forward from the rear wall 10.
6 (FIG. 3) is welded to the rebars 17, 18 in the rear wall 10,
The front end has a hole 19 into which the lifting hook fits. Two tension members 14 having different lengths extend upward from one pillow member 1 to hold the rear wall 10 in the illustrated inclined posture. Front wall 9
The front and rear ends of the tension member 21 made of an angle member or a reinforcing bar are welded to the anchor 20 protruding rearward from the rear surface and the anchor 16 of the rear wall 10 having a corresponding height, and at least above one pillow member 1. The two tension members 21 extend substantially horizontally and hold the posture (vertical posture in the illustrated example) of the front wall 9 with respect to the rear wall 10.

The front half of the upper end surface of the rear wall 10 is the rear wall 1.
The front upper flange 23 has a thickness half the thickness of 0, and the rear lower flange 2 on the lower surface of the second-stage rear wall 10a is formed there.
4a meshes with each other, whereby the lower end of the rear wall 10a is stably supported by the upper end of the rear wall 10. A rear lower flange 24b of the third lower rear wall 10b meshes with the front upper flange 23a at the upper end of the rear wall 10a. 14a is an anchor 16a
A tension member that connects the anchor 16a and the anchor of the second front wall 9a, and a reference numeral 21b is a tension member that connects the anchor 16b and the anchor of the front wall 9a. The front wall 9 is provided with a rear upper flange 25 at the upper end, and a front lower flange 2 at the lower end of the front wall 9a of the second stage is provided therewith.
6a is engaged. The rear walls 10, 10a, 10b have rear lateral flanges 27, 27a, 27b on the left end face,
On the opposite right end face, the above-mentioned rear lateral flanges 27, 27a, 2
A front lateral flange corresponding to 7b is provided so that the rear wall can be arranged sideways along the road (left-right direction) in a long fitted state. The front walls 9, 9a are provided with rear lateral flanges 28, 28a on the left end surface and front lateral flanges corresponding to the rear lateral flanges 28, 28a on the opposite right end surface, and the front wall is laterally (left and right) along the road. Direction) and can be arranged in a fitted state for a long time. The illustrated front wall 9 and rear wall 10
Although the lower end surface of the front wall is flat, the front wall 9 of the second stage is
It is also possible to use both a and the rear wall 10a.

Patterns 30 are regularly provided on the front surfaces of the front walls 9 and 9a according to the mold used for precasting. An insert nut 32 for attaching the scaffold 31 is provided similarly to the anchors 16 and 20. 34 is a space between the front and rear walls, in which concrete is poured. Reference numeral 35 is a jig (shape gauge) that determines the shape of the lower half of the internal space 34 by an angle member or a reinforcing bar, and can be used many times after being buried or after the rear wall 10 is set in a predetermined posture. it can. Reference numeral 36 is a plastic pipe for draining water, the ends of which are fitted into holes 37 in the front and rear walls. 38 is the surface of the road, 39 is the mountain surface that has been carved to make the retaining wall 7, and 40 is the mountain surface that is backfilled after the retaining wall 7 is formed.

To make the retaining wall 7, first scrape the mountain surface 39,
A large number of stones 6 are laid at the place where the retaining wall 7 is installed, and floor laying is performed so that the stones are rolled flat, and concrete pillow materials 1 are laid parallel to each other at equal intervals along the road. The distance between the pillows 1 is set to be at least two, preferably three to four below the front wall 9 and the rear wall 10. Next, the rear wall 10 is hung by a wrecker or the like, and the lower edge of the rear surface of the rear wall 10 is tilted until it hits the jig 35 with the rear end projection 5 of the pillow 1 being squeezed. The material 14 is welded and the rear wall 10 is released from the wrecker. Then, the front wall 9 is hung by a wrecker or the like, and the front lower edge portion of the front wall 9 is applied to the jig 35 in a state of being applied to the front end protrusion 2 of the pillow material 1 and kept vertically, for example, and the tension member 21 is welded, The drainage pipe 36 is attached and the front wall 9 is released from the wrecker. A large number of front walls 9 and rear walls 10 are assembled along the road by the same procedure. Next, the rear wall 10a of the second stage is suspended, the rear lower flange 24a of the rear wall 10a is fitted to the front upper flange 23 of the rear wall 10, and the rear surfaces of the rear walls 10 and 10a are made the same with a bar gauge (not shown). Keep the surface flat and weld the bracing material 14a to the rear wall 1
Release 0a from wrecker. Second front wall 9
a is suspended, the front lower flange 26a of the front wall 9a is fitted to the rear upper flange 25 of the front wall 9, and the front surfaces of the front walls 9 and 9a are kept in the same plane (vertical surface) by a bar gauge (not shown), The tension member 21a is welded to release the front wall 9a from the wrecker. A large number of second-stage front walls 9a and rear walls 10a are assembled along the road in the same procedure. Before attaching the rear wall 10b of the third stage, both ends of the row of the front walls 9 and 9a and the rear walls 10 and 10a having a predetermined length are covered with a plywood board or the like, scaffolds 31 and 31a are attached, and the interior space 34 is made of concrete. To place. During the curing of the concrete, the rear wall 10b of the third stage is hung, the rear lower flange 24b is fitted to the front upper flange 23a, the tensile member 21b is welded, and the second concrete is finished at the stage when the previous concrete curing is completed. The casting is performed up to the upper surface of the space 34. After curing or in parallel, perform post-extension.

[0009]

According to the first aspect of the present invention, since the front walls 9 and 9a having the pattern 30 can be used, the view from the road is improved. It is easy to apply resin processing to the surface in advance. The front walls 9, 9a and the rear walls 10, 10a, 10b have reinforcing bars 17, 1,
8 (FIG. 3) is built in the factory in advance, the tensile strength in the vicinity of the front and rear surfaces of the retaining wall 7 is increased, and the rigidity of the retaining wall 7 as a whole is improved. Further, since the pillow material 1 having the projections 2 and 5 is adopted, the dimensions of the lower ends of the front and rear walls are accurately determined, the overall dimensional accuracy is improved, and it is easy to make. The concrete in the space 34 also enters the gap between the stones 6 between the adjacent pillows 1 and 1 and is firmly bonded to the stones 6 and the pillow 1, so that the strength against earth pressure is significantly increased. According to the second invention, workability at the site is improved and the construction period is shortened. That is, since the work of supporting work assembly, formwork assembly, mold release, support work removal, etc. that requires skill (professional) is eliminated,
It eliminates the need for a profession such as a form carpenter, and makes it easy to attach the tension members 14, the tension members 21, etc., and shortens the construction period. Moreover, a strong retaining wall 7 with high dimensional accuracy can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a retaining wall before placing concrete.

FIG. 2 is a sectional view taken along line II-II of FIG.

3 is a sectional view taken along line III-III in FIG.

[Explanation of symbols]

 1 Concrete pillow 2 Protrusion 5 Protrusion 9 Front wall 10 Rear wall 14 Extension material 21 Tensile material 34 Space where concrete is placed

Claims (2)

[Claims] 1. A concrete pillow material with built-in reinforcing bars, which has positioning protrusions at the front and rear ends of the upper surface and is arranged in parallel on a plane at a distance, and the front surface of the rear end protrusions of at least two pillow members. A rear wall made of a concrete plate with a built-in reinforcing bar that is inclined forward as the lower edge engages and goes upward, and a tension member attached between the pillow and the rear wall so as to support the rear wall in an inclined posture, The front wall is made of concrete plate with built-in reinforcing bars, the lower edge of which engages with the rear surface of the front end projection of the pillow material, and is inclined rearward slightly as it goes vertically or upward, A gravity-type retaining wall made of concrete that is placed between the front and rear walls and a tension material that is attached between the wall and the rear wall. 2. Pillows having positioning projections at the front and rear ends of the upper surface are arranged in parallel on the same flat surface where stones are laid and the rear wall made of concrete plate with built-in reinforcing bars is hung down. Incline the rear wall by attaching a tension member between the pillow and the rear wall with the edges engaging the front surfaces of the rear end projections of at least two pillows and holding the posture inclined forward as it goes upward. Hold the posture, then suspend the front wall made of concrete plate with built-in reinforcing bars, and hold the posture in which the lower edge engages with the rear surface of the front end protrusion of the pillow and tilts slightly backward as it goes vertically or upward. Install a tension member between the rear wall and the front wall to maintain the posture of the front wall, and place the front wall and the rear wall different from the above front and rear walls on the pillow other than the above pillow. Keep them in the same plane and attach different tensioning and tensioning materials to each other and pour concrete between the front and rear walls. Method of manufacturing gravity type retaining wall to be installed.