JPH047407B2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a construction method for retaining walls.

As is well known, when constructing an underground structure, a retaining wall is constructed to surround the structure.

As a type of construction method for mountain retaining walls, a relatively short rectangular trench is excavated from the ground using a mud method using a self-hardening stabilizing liquid, and steel materials such as H-beams are erected in the self-hardening stabilizing liquid. There is a construction method in which a stabilizing liquid is solidified to form a panel-shaped wall body, which is successively connected laterally to form a retaining wall.

However, with this construction method, especially when constructing a mountain retaining wall and excavating the inside thereof, the wall may be scraped off due to an operating error of the excavator, or a part of the wall may peel off or the skin may peel off. Occasionally, a falling phenomenon occurred.

Therefore, in the past, a wire mesh was attached to the inner wall of the steel groove to prevent the solidified wall from peeling off or falling off.

However, such a solution has the following drawbacks.

In other words, since the wire mesh and the wall are partially bonded to each other, there is a risk that peeling and peeling may occur sporadically in the mesh area, resulting in an unsightly appearance. There was also the problem that the inner surface of the wall, which was exposed as the interior was excavated, was exposed to the air, causing further deterioration and further promoting peeling and peeling.

Here, the ``Yam-stop method'' (Japanese Patent Application Laid-Open No. 1983-1999) was developed, which aims to perform heap-stopping without using horizontal sheet piles by increasing the pressure resistance, that is, the shear and bending strength, of the stable liquid solidified material in the heap-stopping wall. -16140) has been proposed. In this proposal, multiple main reinforcing members are vertically inserted at intervals into a trench drilled into the ground while filled with stabilizing liquid, and members woven in a lattice or net shape are placed on the root cut side between the main reinforcing members. After that, the stabilizing liquid is solidified, and after the stabilizing liquid has solidified, the main reinforcing material is exposed by cutting and excavating the roots.

Even with such a proposal, the root cutting excavation is limited to the main reinforcement, and the solidified stabilizer liquid will be exposed on the root cutting excavation surface that is inside the retaining wall, which will cause damage to the retaining wall. There were problems with wall scraping, peeling, peeling, and surface deterioration on the surface of the root cutting excavation. Furthermore, even if the secondary reinforcing material is exposed as a result of root cutting excavation that exposes the main reinforcing material, since the secondary reinforcing material is in the form of a lattice, the same problem as when wire mesh is used as described above will occur. It was hot.

This invention has been made in view of the above-mentioned conventional problems, and its purpose is to:
It is an object of the present invention to provide a method for constructing a retaining wall that can improve the curing of the retaining wall, prevent peeling and peeling, and maintain the aesthetic appearance of a construction site.

In order to achieve this object, the present invention involves excavating a trench while replenishing it with a self-hardening stabilizer, building steel materials in parallel at intervals in the trench, and hardening the self-hardening stabilizer. In the method of constructing a mountain retaining wall, a flat sheet material that covers the mountain retaining wall formed on the ground side and forms the root cutting excavation surface is placed on the root cutting side between the steel materials arranged in parallel. is arranged in advance, and then built into the groove filled with the self-hardening stabilizing liquid, and after the self-hardening stabilizing liquid hardens, the roots are cut and excavated to the sheet material. .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 show an embodiment of the method for constructing a retaining wall according to the present invention in the order of steps.

As shown in FIG. 1, the construction method is to first excavate a rectangular cross-section groove hole 10 from the ground to a predetermined depth while replenishing the self-hardening stabilizing liquid 12.

Next, as shown in FIG. 2, before the self-hardening stabilizing liquid 12 hardens, a steel material 14 is placed in the slot 10 filled with the self-hardening stabilizing liquid 12. A plurality of steel members 14 are connected in parallel with each other at intervals by appropriate means in advance, and the root cut side between the steel members 14 arranged in parallel is covered with a retaining wall formed on the ground side and the root cut side is A flat sheet material 16 is attached to be formed on the cut and excavated surface.

Specifically, a relatively thin steel plate is suitable as the sheet material 16, and preferably it is attached so that the inner surface of the steel material 14 and its flat surface substantially coincide.

Then, after the above-mentioned steel material 14 is built into the groove hole 10 and the self-hardening stabilizing liquid 12 is hardened, the same panels are successively connected in the horizontal direction to construct a retaining wall, and then the inside of the retaining wall is Root cutting and excavation are performed up to the sheet material 16, and the hardened self-hardening stabilizing liquid 18 inside the sheet material 16 is also removed to expose the sheet material 16 and the steel material 14, as shown in FIG.

Now, when a mountain retaining wall is constructed using the construction method described above, the sheet material 16 and the self-hardening stabilizing liquid 12 will be mixed even when the self-hardening stabilizing liquid 12 solidifies, since the sheet material 16 is flat. Since it does not stick firmly and is close to the inner surface of the slot 10, the inner side of the hardened self-hardening stabilizer 18 can be peeled off relatively easily, and the sheet material 16 can be easily removed. Can be exposed.

Therefore, unlike the wire mesh used in conventional construction methods, the hardened self-hardening stabilizer 18 does not peel off or peel off the skin, which spoils the aesthetic appearance.
Moreover, there is no need to worry about peeling or skin loss.

Furthermore, even if the inside of the mountain retaining wall is excavated, the hardened self-hardening stabilizer 18 will not be affected by the inner surface of the sheet material 1.
6 and the steel material 14, it is almost completely covered and there is no risk of exposure to the air, preventing progression and acceleration of deterioration as in the conventional case.

In addition, when constructing a retaining wall, one end of the sheet material 16 is attached to the steel material on the trailing panel side at the connecting part between each panel, and after excavating the inside of the retaining wall, the other end is attached to the leading panel. It may be attached to the steel material on the side, or it may be constructed without attaching the sheet material 16 between the panels, and the retaining wall may be constructed and attached when the inside is excavated.

As explained above in the embodiments, in the method of constructing a mountain retaining wall according to the present invention, when constructing an underground structure by cutting and excavating the inside of a mountain retaining wall, steel materials arranged in parallel A flat sheet material that covers the retaining wall formed on the ground side and forms the root cutting excavation surface was placed in advance on the root cutting side between them, and then the self-hardening stabilizing liquid was replenished. By building it in the trench and excavating the roots down to the sheet material after the self-hardening stabilizing liquid has hardened, it effectively and reliably prevents the peeling of the retaining wall and falling skin, maintaining the beauty of the construction site. At the same time, excellent effects such as preventing the mountain retaining wall from deteriorating due to exposure to air can be obtained.

[Brief explanation of drawings]

Figures 1 to 3 show an embodiment of the present invention in the order of steps; Figures 1 and 2 are plan views, and Figure 3 is a diagram showing the inside of a retaining wall excavated. be. 10...Slot hole, 12...Self-hardening stabilizer, 14...
... Steel material, 16 ... Sheet material, 18 ... Hardened self-hardening stabilizer.

Claims (1)

[Claims] 1. In a method of excavating while replenishing a self-hardening stabilizing liquid in a trench, building steel materials in parallel at intervals in the trench, and building a mountain retaining wall with the hardening self-hardening stabilizing fluid, A flat sheet material that covers the mountain retaining wall formed on the ground side and forms the root cutting excavation surface is placed in advance on the root cutting side between the steel materials arranged in parallel, and then this is placed on the root cutting side between the steel materials arranged in parallel. A method for constructing a mountain retaining wall, characterized in that the wall is built into the groove filled with a self-hardening stabilizing liquid, and after the self-hardening stabilizing liquid hardens, cutting and excavation is performed up to the sheet material.