JPS6245370B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for constructing vertical walls of underground concrete structures such as basements.

When constructing vertical walls of underground concrete structures from above the ground, sheet piles are buried, but movement of the soil often causes damage to buildings and adjacent ground. This invention has been made to solve these problems.

Embodiments of the present invention will be described based on the drawings.

A special excavating tool 18 suitable for use in carrying out the present invention will be explained based on FIGS. 1 and 2. The principle of this special drilling tool 18 is
It is described in Publication No. 27442. A box-shaped body 19 extending in the vertical direction and having a sheet-pile-shaped horizontal cross section is erected on the ground, and when high-pressure water 21 is jetted from the nozzle of the jet pipe 20, the high-pressure jetted water cuts and digs the ground, and the box-shaped body 19 dead weight and box-shaped body 1
The box-shaped body 19 is buried in the ground by the weight 30 added to the weight 9. Next, the grout injection pipe 22
When the box-shaped body 19 is pulled out while pouring the mixed liquid (grout) 23 from the hole, the hole formed in the ground is filled with the mixed liquid.

The hook grooved sheet pile 3 will be explained based on FIGS. 3 to 5. This hooking grooved sheet pile 3 has lightning-shaped steel members 5 arranged and fixed along the longitudinal direction near both sides of the central plate portion 4 of the mountain face 7.
A hooking groove 6 consisting of a groove bottom 24 intersecting with the center plate portion 4 is provided.

The hooking rod 14 will be explained based on FIGS. 6 and 7. This hooking rod 14 preferably has a disk 27 fixed to one end of a rod portion 25 via an L-shaped piece 26. If it is made into a disk, any part of the periphery will be caught in the hooking groove 6 of the hooking grooved sheet pile 3, and the rod portion 25 will not move in the axial direction. Therefore, the rod portion 25 can be hooked on the hook groove 6 regardless of the rotational position.

The construction method of this invention will be explained based on the drawings.

First step (see Fig. 8)... At least every other sheet pile 3 with hook grooves, which has hook grooves 6 along the longitudinal direction on both sides of the central plate portion 4, is lined up in a line from above the ground into the soil 12. Immerse yourself in the process. The other sheet piles 2 arranged every other place may be the above-mentioned sheet piles with hook grooves, or may be ordinary sheet piles. In addition, the sheet pile 1 (the sheet pile 3 with hooking grooves and other sheet piles 2 are combined together to form a sheet pile) is immersed using a special excavating tool 18, which is inserted into the ground with high pressure water 21, and as required. Use a special digging tool 18 using a weight 30 according to the
When the grout reaches the designated position, a mixed liquid (for example, cement, bentonite, rapid hardening material for soil stabilization, and water mixture) is squirted from the tip of the excavating tool using a grout pump.
The special excavating tool 18 is gradually pulled out, leaving the mixed liquid column in the ground and gelling it, thereby filling cavities and voids in the ground created during underground excavation and stabilizing the ground. Next, inserting the sheet pile 1 into the mixed liquid under pressure using a special vibro or the like is efficient and can minimize damage to the surrounding area.

Second step (see FIG. 9): The soil 12 on the mountain side 7 of the hooked grooved sheet pile 3 is excavated.

Third step (see Fig. 10): Passing the partition plate 13 made of plywood or the like between the hook grooves 6, 6 of the adjacent hook grooved sheet piles 3, 3, and inserting one end of the hook rod 14 into the hook groove 6. The work involves assembling the outer formwork 8 consisting of the plywood 9, vertical columns 10, horizontal columns 11, etc. on the other end of the hook and hook rod 14, and if necessary, applying a concrete release agent or Non-adhesive agent 1
6.

Fourth step (see FIG. 11): Concrete 28 is poured between the outer formwork 8, the mountain side 7 of the hooked grooved sheet pile, and the partition plate 13.

Fifth step (see Fig. 12): Fill the space 15 inside the partition plate 13 with coarse sand or the like (sometimes a substance that gels the silt-like mixture) 29 and tighten with water and solidify. .

Sixth step (see Fig. 13): The sheet pile 3 with hooking grooves and the other sheet piles 2 are pulled out, and the gaps left by the pulling out are solidified by suitable means such as water tightening or filling with liquid solidified material.

According to this invention, the improvement of the sheet pile makes it easy to attach the hanging rod, and it is also easy to pull out the sheet pile, and the gap between the sheet pile and the concrete wall is small, so less backfilling sand is required. The safety of the adjacent ground after pulling out is high because the restoration work is nearing completion.

Furthermore, when using the above-mentioned special excavation tool, the sheet pile enters accurately because of the mixed liquid column, there is no friction with the soil on the sheet pile, and it can be driven and pulled out without difficulty, and the ground is stabilized because the mixed liquid is injected into the ground. It has features such as the fact that the soil is not lifted up when the sheet pile is pulled out (because it is wrapped in the liquid mixture).

In addition, if the steel members 5 of the hook grooved sheet pile 3 are provided near both sides of the center plate portion 4, the center plate portion 4
Since the containers do not come out from the container, it is convenient to stack them and transport them as shown in FIG.

Note that this invention is not limited to the embodiments described above, and various modifications are possible.

[Brief explanation of the drawing]

The drawings are for explaining embodiments of the invention. Figures 1 and 2 illustrate a preferred specialized excavation tool for use in the practice of this invention.
FIG. 1 is a perspective view, and FIG. 2 is a side view. 3 to 5 show a sheet pile with hook grooves, in which FIG. 3 is a rear view, FIG. 4 is a left side view of FIG. 3, and FIG. 5 is a bottom view of FIG. 3. 6 and 7 show the hooking rod, FIG. 6 is a plan view in a state of use, and FIG. 7 is a rear view taken from - in FIG. 6. FIGS. 8 to 13 are plan views showing the vertical wall construction method in the order of steps. 1... Sheet pile, 2... Sheet pile, 3... Sheet pile with hook groove, 4... Center board, 5... Steel material, 6... Hook groove, 7... Mountain surface, 8... Formwork, 9
...Veneer, 10...Vertical column, 11...Horizontal column, 12
...Soil, 13...Partition plate, 14...Hook bar, 15
...Space, 16...Concrete release agent/non-adhesive agent, 17...Disc, 18...Special excavation tool, 19...
... Box-shaped body, 20 ... Jet pipe, 21 ... High pressure water, 22 ... Grout injection pipe, 23 ... Grout, 24 ... Groove bottom, 25 ... Rod section, 26 ...
L-shaped piece, 27...disc, 28...concrete,
29... Coarse sand, 30... Weight.

Claims (1)

[Scope of Claims] 1. A first step in which at least every other sheet pile with hook grooves having hook grooves extending in the longitudinal direction near both sides of the central plate portion is arranged in a line from above the ground into the soil and sequentially immersed. The second process involves digging up the soil on the mountain side of the sheet pile with hook grooves, passing the partition plate between the hook grooves of the adjacent sheet pile with hook grooves, and inserting one end of the hook rod into the hook groove. The third step includes hooking and assembling the outer formwork on the other end of the hooking rod, and the third step of pouring concrete between the outer formwork and the mountain side of the sheet pile with hooking grooves and the partition plate. 4th step, 5th step of embedding coarse sand or liquid solids in the space inside the partition plate and solidifying it, and pulling out the hooked grooved sheet pile and other sheet piles and filling the gaps left by the pulling out as appropriate. A method for constructing a vertical wall of an underground concrete structure, comprising: a sixth step of solidifying by means of a method; 2. A first step of sequentially immersing at least every other sheet pile with hook grooves, which has hook grooves along the longitudinal direction on both sides of the central plate part, in a line from above the ground into the soil; The second step is to excavate the soil on the mountain side of the pile, pass the partition plate between the hook grooves of the adjacent sheet piles with hook grooves, hook one end of the hook rod into the hook groove, and remove the other end of the hook rod from the hook groove. The third process includes assembling the outer formwork at the end, applying a concrete release agent or non-stick agent to the center plate on the mountain side of the sheet pile with hook grooves, and installing the outer formwork and hook grooves. The fourth step is pouring concrete between the mountain side of the attached sheet pile and the partition plate, the fifth step is filling the space inside the partition plate with coarse sand, liquid solids, etc. and solidifying it, and the hooking groove. A method for constructing a vertical wall of an underground concrete structure, comprising: a sixth step of pulling out the attached sheet pile and other sheet piles and solidifying the gap left by the pulling out by an appropriate means; 3. A first step of sequentially immersing at least every other sheet pile with hook grooves, which has hook grooves along the longitudinal direction on both sides of the central plate part, in a line from above the ground into the soil; The second step is to excavate the soil on the mountain side of the pile, passing a partition plate between the hook grooves of adjacent sheet piles with hook grooves, and hooking one disc-shaped end of the hook rod into the hook groove and hooking the pile. a third step that includes assembling an outer formwork on the other end of the rod; a fourth step of pouring concrete between the outer formwork and the mountain side of the hooked grooved sheet pile and the partition plate; The fifth step is to embed coarse sand, liquid solids, etc. into the space inside the partition plate and solidify it, and to pull out the hooked grooved sheet pile and other sheet piles, and to solidify the gap left by the pulling out by appropriate means. A vertical wall construction method for an underground concrete structure characterized by a sixth step and the following steps.