JPH08193338A - Installation method for retaining wall with slip preventive board - Google Patents

Abstract

PURPOSE: To make it possible to comply with changes in a ground earth pressure or overburden loads and ensure the action of a slip preventive board with the same retaining wall. CONSTITUTION: A semi-finish retaining wall 5 having a concrete-un-placed part where reinforcements 3a are exposed on a bottom plate 3 and a slip preventive board 1 where reinforcements 1a are exposed on the top are separately manufacture at a shop. Then, the exposed reinforcements 1a are inserted into the concrete un-placed part 4 on the slip preventive board 1 buried in a ground 2, thereby installing the semi-finish retaining wall 5. In addition, the exposed reinforcements 1a of the slip preventive board 1 and the exposed reinforcements 3a of the bottom plate 3 are connected while the semi-finish retaining wall 5 and the slip preventive board 1 are integrated by placing concrete to the concrete un-placed part 4, thereby formine a retaining wall 6 with a slip preventive board. It is possible to comply with the ground 2 which varies with soils and earth pressures only with the slip preventive board 1 manufactured and buried so that a passive earth pressure may be available on a satisfactory extent. Various kinds of retaining walls 6 with the slip preventive board are available. It is also possible to manufacture and install the various slip preventive board-equipped retaining walls 6 by using the same semi-finish retaining wall without the slip preventive board 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retaining wall for retaining a retaining wall such as an earth retaining wall, which is provided with a slide prevention plate on a bottom slab so as to prevent the retaining wall. It concerns the installation method.

[0002]

2. Description of the Related Art A precast reinforced concrete retaining wall used for earth retaining or the like is installed by shortening the length of a bottom plate 20 like an L type shown in FIG. 12 or an inverted T type shown in FIG. When it is necessary, the bottom plate 20 is integrally manufactured with a plate 21 for preventing slippage and is manufactured by a factory.
Also, as shown in FIG. 14, even when the retaining wall is installed in an inverted L shape for earth retaining purposes, the top plate weight of the bottom plate 20 is insufficient, so the bottom plate 20 is installed with a long length. In addition, similarly to the case where the length of the bottom plate 20 is shortened, a plate in which the plate 21 for preventing slippage is provided integrally with the bottom plate 20 is installed.

However, when installing a retaining wall in which the slide prevention plate is integrally formed on the bottom slab, a groove for inserting the slide prevention plate is dug in the foundation ground to be installed and placed on it. Therefore, in such installation work, when the retaining wall is installed, the anti-slip plate and the foundation ground in the groove do not come into close contact with each other, the passive earth pressure to prevent sliding is weak, and the sliding resistance is small. It could be a wall.

For this reason, conventionally, in order to improve the close contact between the anti-slip plate and the foundation ground, the position and the size of the groove into which the anti-slip plate is inserted must be reliably and accurately applied. Is being dealt with. In addition, a method may be adopted in which a bottom plate of the retaining wall is perforated and grouted to increase passive earth pressure.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention A precast reinforced concrete retaining wall to which an anti-slip plate needs to be attached must ensure that the attachment position of the anti-slip plate to its bottom slab is as high as described above. Therefore, it will vary depending on the earth pressure of the installation ground and the load applied.
In addition, the size of the slip prevention plate changes due to the passive earth pressure that changes from the soil quality of the foundation ground on which the retaining wall is installed.

[0006] This means that when manufacturing a retaining wall with a slide plate attached to the bottom slab at the factory, an optimum slide plate with different mounting positions and sizes is required according to the foundation ground of various installation sites. Becomes Therefore, since it is necessary to match the anti-slip plate to the foundation ground of various installation sites, the number of types of retaining walls is very large, which is uneconomical.

In addition, when it is attempted to manufacture a retaining wall having a large number of types of anti-slip plates attached thereto, the precision of the position at which the anti-slip plate is attached and the dimensions of its attachment portion are improved for each retaining wall. That can be a tedious and difficult task. Moreover, when installing the retaining wall with the anti-slip plate on the foundation ground, it is necessary to move the entire retaining wall and insert the anti-slip plate into the groove for embedding to fix it, but the type is different. If this work is performed for each anti-slip plate, the adhesion between the anti-slip plate and the foundation ground may deteriorate, and the passive earth pressure may not sufficiently act on the anti-slip plate.

The present invention was devised in view of the above-mentioned circumstances, and an object thereof is to easily deal with the case where the earth pressure of the ground on which the retaining wall is installed or the load on the retaining wall changes. It is an object of the present invention to provide a method of installing a retaining wall with an anti-slip plate that can ensure the action of the anti-slip plate with the same retaining wall.

[0009]

According to the present invention, a retaining wall made of precast reinforced concrete and an anti-slip plate made of precast reinforced concrete are separately manufactured in a factory. The retaining wall manufactured at this factory is a semi-finished product that has a concrete unplaced part with exposed bar arrangement on its bottom slab. The anti-slip plate is manufactured by exposing a part of the reinforcing bars for forming the anti-plate in one direction (upper surface).

In the method of installing the retaining wall with the anti-slip plate of the present invention, first, the anti-slip plate designed to have a predetermined size is exposed at a predetermined position of the foundation ground with the exposed reinforcing bar as the upper surface. It is buried in the state where it was made. In addition, a semi-finished retaining wall having a bottom slab of concrete non-casting part is installed on the embedded part of the anti-slip plate so that the exposed reinforcing bar of the anti-slip plate is inserted into the non-concrete non-casting part. Next, connect the reinforcing bars exposed from the anti-slip plate to the exposed reinforcing bars of the bottom slab in the retaining wall, and then cast in-place concrete into the uncast concrete part to make the semi-finished retaining wall and anti-slip plate. By integrating them, it is completed as a retaining wall with a slip prevention plate. This anti-slip plate prevents slippage after the retaining wall is installed.

In such an installation method of the present invention, since only the anti-slip plate is separately manufactured and buried, a retaining wall having anti-slip plates in various states corresponding to different soil types and soil pressures is provided. Can be provided. Further, the retaining wall having the anti-slip plates in various states can be easily manufactured and installed by using the same semi-finished retaining wall having no anti-slip plate.

From these things, the installation method of the present invention is
Installation of the retaining wall is facilitated, and the anti-slip plate and the foundation ground are firmly brought into close contact with each other so that the anti-slip plate can obtain sufficient passive earth pressure. Further, it provides a safe retaining wall for earth retaining that can surely prevent sliding even if the bottom plate is short.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for installing a retaining wall with an anti-slip plate according to the present invention will be described below with reference to the illustrated embodiments.

A retaining wall with an anti-slip plate, which is used for retaining soil and is installed on the foundation ground of a retaining wall having an anti-slip plate attached to a bottom slab to ensure the action of the anti-slip plate. The installation method (see FIGS. 1 and 2) is as follows.
Place the anti-slip plate 1 (see FIG. 3) on a part of the reinforcing bars 1a
Was made in the state that it was exposed to the upper surface for connection, and it was embedded in the foundation ground 2 with the exposed rebar 1a exposed, and at the bottom slab 3 part of the rebar 3a of the bar was exposed. The semi-finished retaining wall 5 having the setting portion 4 is placed on the embedded portion of the slip prevention plate 1 so that the exposed reinforcing bar 1a of the slip prevention plate 1 is inserted into the uncasted portion 4 of the concrete.

Next, the exposed rebar 1a for connection, which is exposed from the anti-slip plate 1, and the exposed rebar 3a of the bottom plate reinforcement, which is exposed in the uncast concrete part 4 of the semi-finished retaining wall 5, are connected. At the same time, cast-in-place concrete is poured into the uncast concrete portion 4 of the bottom slab 3 in the semi-finished retaining wall 5. And
The semi-finished retaining wall 5 and the anti-slip plate 1 are integrated to complete the retaining wall 6 with the anti-slip plate, and the anti-slip plate 1 can prevent the retaining wall 6 from sliding.

In the semi-finished retaining wall 5 of this embodiment, the concrete non-implanted portion 4 of the bottom slab 3 is made partial, and the center of gravity is lowered by reducing the concrete non-implanted portion 4 of the bottom slab 3. It is manufactured. Therefore, at the time of placing the semi-finished retaining wall 5 on the anti-slip plate embedding portion, the independence and stability can be improved, and on-site work such as concrete casting can be reduced.

As shown in FIG. 2, the semi-finished retaining wall 5 is constructed by partially arranging the concrete non-casting portion 4 of the bottom slab 3 on the rising plate 10 side and the bottom slab 3. It is conceivable that a concrete casting portion 7 is formed at the tip of the concrete slab, and a band-shaped concrete non-casting portion 4 is formed at the center portion over the entire width of the bottom slab 3. As shown in FIG. 3, the slip prevention plate 1 in this case has a uniform exposed reinforcing bar 1a in the entire width direction thereof.

Further, the partially unfinished concrete part 4 of the bottom slab 3 in the semi-finished retaining wall 5 is as follows:
As shown in FIG. 4, it is conceivable that a concrete casting portion 7 is formed on the outer peripheral portion of the bottom slab 3 and a concrete non-casting portion 4 is formed in the center portion. In this case, the anti-slip plate 1 (not shown) has an exposed reinforcing bar 1a only at the center in the width direction.
Will have.

Further, the bottom plate 3 in the semi-finished retaining wall 5
As shown in FIG. 5, the concrete non-placed portion 4 is partially formed in the width direction of the bottom slab 3, and the remaining portion is formed by the concrete cast portion 7. It is conceivable. As shown in FIG. 5, the anti-slip plate 1 in this case has exposed reinforcing bars 1a only in the widthwise direction of the bottom slab 3 corresponding to the non-concrete-concrete parts 4 of the concrete.

On the other hand, the anti-slip plate 1 in this embodiment has various anti-slip plates such as different anti-slip plates having different mounting positions and shapes, or a plurality of anti-slip plates integrated with each other. It is possible to integrate the wall.

For example, as shown in FIG. 6, the slip prevention plate 1
It is conceivable to install a plurality of front and rear in parallel with appropriate intervals. By doing so, the passive earth pressure is increased in each anti-slip plate 1 (passive earth pressure increases at the same magnification as the number of the anti-slip plates 1 installed), and the anti-slip force is improved, whereby the retaining wall 6 The length of the bottom plate 3 can be further reduced.

Further, as shown in FIG. 7, particularly (b) of FIG. 7, it is also possible to form the slip prevention plate 1 in a substantially V-shaped cross section. In this way, the area in contact with the foundation ground,
It becomes larger than the case where it is linear, the passive earth pressure can be increased, and the length of the bottom plate 3 of the retaining wall 6 can be further reduced.

Further, as shown in FIG. 8, the slip prevention plate 1
It is possible that the mounting position of was changed. By doing so, it is possible to easily deal with the case where there is a structure such as a sewer or a foundation of a building in the basement.

The retaining wall 6 having the bottom plate 3 in which the anti-slip plate 1 is integrated in various modes shown in FIGS. 3 to 8 depends on the condition of the foundation ground 2 and the installation density of the anti-slip plate. ,
Depending on the construction environment and the like, they can be properly used.

FIG. 9 shows another mode of the concrete non-implanted portion 4 of the bottom slab 3 in the semi-finished retaining wall 5, where the concrete non-impregnated portion 4 covers the entire surface of the bottom slab 3 in the semi-finished retaining wall 5. I have. The fact that the concrete non-implanted portion 4 extends over the entire surface of the bottom slab 3 means that the slip prevention plate 1 and the plurality of slide prevention plates 1 having different attachment positions and shapes to the bottom plate 3 as described above are integrated. Can be easily performed. That is, the uncast concrete part 4
However, in the embodiment shown in FIG. 6, the work for integration can be easily performed without such a restriction. Like that.

In order to install the retaining wall 6 by the method of installing the retaining wall with a slip prevention plate having such a configuration, the following is performed.

First, as shown in FIG. 3, a slip prevention plate 1 having a reinforcing bar 1a exposed on the upper surface is manufactured in a factory. And
As shown in Fig. 1 (a), the anti-slip plate 1 manufactured at the factory
Is taken into the retaining wall installation site, and a groove 8 for burying the anti-slip plate is excavated in the foundation ground 2 at a predetermined position in the installation site.

Thereafter, as shown in FIG. 1 (b), the anti-slip plate 1 is inserted and installed in the groove 8 with the exposed reinforcing bar 1a as the upper surface. And the anti-slip plate 1 is buried and fixed in the groove. As a result, the passive earth pressure of the foundation ground 2 sufficiently acts on the embedded slide prevention plate 1.

Next, as shown in FIG. 1B, the groove 8
A semi-finished retaining wall 5 formed with a portion of the bottom slab 3 as a concrete non-implanted portion 4 with the reinforcing bars 3a exposed is placed on the anti-slip plate 1 embedded therein. At this time, the exposed rebar 1a of the anti-slip plate 1 is inserted into the uncast concrete part 4, and the exposed rebar 1a of the anti-slip plate 1 and the exposed rebar 3a of the bottom slab 3 are inserted.
And concatenate.

Thereafter, as shown in FIG. 1 (c), concrete 9 is cast (in-situ cast) into the concrete non-cast portion 4 of the bottom slab 3, and the slip prevention plate 1 and the bottom slab 3 (semi-finished holder) The retaining wall 6 with the anti-slip plate is completed by integrating the wall 5) with the wall 5). Then, the retaining wall 6 can sufficiently withstand the sliding of the foundation ground 2 due to the earth pressure due to the anti-slip plate 1 even with the short bottom slab 3.

Thus, according to the installation method of the present invention,
The retaining wall 6 having the slip prevention plate 1 can be easily installed, and the slip prevention plate 1 and the foundation ground 2 are securely brought into close contact with each other.
The slip prevention plate 1 can obtain a sufficient passive earth pressure. Therefore, the retaining wall 6 such as a safe earth retaining wall can be provided.

The arrangement state of the exposed reinforcing bar 3a in the concrete unplaced portion 4 may be in another mode as shown in FIG. Here, the bottom slab reinforcement 3a exposed in the concrete non-implanted portion 4 of the bottom slab 3 in the semi-finished retaining wall 5 is not horizontally penetrated through the concrete non-impregnated portion 4 but horizontally in the concrete non-implanted portion 4. In a state where it only protrudes. Then, through the rebar 11 that is newly laid in the concrete non-implanted portion 4 for the bottom slab 3, the bottom slab reinforcement 3a protruding into the concrete unimplanted portion 4 and exposed from the slide prevention plate 1 are exposed. Connected to the connecting reinforcing bar 1a.

Such an arrangement state of the exposed reinforcing bar 3a in the concrete non-casting portion 4 is determined when the connecting portion between the exposed reinforcing bar 1a of the anti-slip plate 1 and the exposed reinforcing bar 3a of the bottom slab 3 is not properly accommodated. adopt.

In this arrangement, instead of cutting the exposed reinforcing bar 3a of the bottom slab 3 at the unconcreted portion 4 so that the end of the reinforcing bar 3a projects horizontally to the unconcreted portion, As shown in FIG.
(For example, a nut) may be embedded in the slab concrete, and the reinforcing bar 13 may be attached to the fitting 12 so as to project.

[0035]

According to the method of installing the retaining wall with the anti-slip plate of the present invention, since only the anti-slip plate is separately manufactured and buried, the anti-slip properties of various states corresponding to the soil of different soil quality and earth pressure are prevented. A retaining wall having a plate can be easily provided. Further, the retaining wall having the anti-slip plates in various states can be easily manufactured and installed by using the same semi-finished retaining wall having no anti-slip plate.

From the above, according to the installation method of the present invention, it is possible to easily perform the installation construction of various retaining walls with anti-slip plates, and to firmly adhere the foundation ground and various anti-slip plates, Various anti-slip plates can obtain a sufficient passive earth pressure, and it is possible to easily and reliably provide a safe retaining wall for earth retaining or the like that can reliably prevent slip even if the bottom plate is short. .

[Brief description of drawings]

FIG. 1 (a) is a schematic cross-sectional view showing an installation state of an anti-slip plate in the installation method of the present invention, and (b) is a schematic cross-sectional view showing an installation state of a semi-finished retaining wall in the installation method of the present invention. , (C) is a schematic sectional view showing a retaining wall with an anti-slip plate installed by the installation method of the present invention.

FIG. 2 is a schematic perspective view showing a semi-finished retaining wall used in the installation method of the present invention.

FIG. 3 is a schematic perspective view showing a slip prevention plate used in the installation method of the present invention.

FIG. 4 is a schematic perspective view showing another embodiment of the semi-finished retaining wall used in the installation method of the present invention.

FIG. 5 is a schematic exploded perspective view showing another embodiment of the semi-finished retaining wall and the anti-slip plate used in the installation method of the present invention.

FIG. 6 is a schematic exploded perspective view showing still another aspect of the slip prevention plate used in the installation method of the present invention.

FIG. 7A is a schematic view showing still another embodiment of the slip prevention plate used in the installation method of the present invention, and FIG. 7B is a view taken along the line AA of FIG.

FIG. 8 is a schematic exploded perspective view showing still another embodiment of the slip prevention plate used in the installation method of the present invention.

FIG. 9 is a schematic perspective view showing still another aspect of the semi-finished retaining wall used in the installation method of the present invention.

FIG. 10 (a) is a schematic view showing another aspect of the arrangement state of the exposed reinforcing bars in the uncast concrete part used in the installation method of the present invention, and FIG. 10 (b) is a line BB arrow of (a). It is a perspective view.

FIG. 11 (a) is a schematic perspective view showing still another aspect of the arrangement state of the exposed reinforcing bars in the uncast concrete part used in the installation method of the present invention, and FIG. 11 (b) is a CC line of FIG. It is an arrow view.

FIG. 12 is a schematic sectional view showing a general retaining wall such as a retaining wall.

FIG. 13 is a schematic sectional view showing another embodiment of a general retaining wall such as an earth retaining wall.

FIG. 14 is a schematic sectional view showing still another mode of a general retaining wall such as a retaining wall.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Anti-slip plate, 1a ... Exposed rebar, 2 ... Foundation ground, 3 ... Bottom slab, 3a ... Exposed rebar, 4 ... Uncast concrete part, 5 ... Semi-finished retaining wall, 6 ... Retaining wall with anti-slip plate, 7 … Concrete pouring part, 8… Anti-slip plate embedding groove, 9… Cast-in-place concrete, 10… Standing plate, 11… Reinforcing bar, 12… Mounting bracket,
13 ... Rebar.

Claims (5)

[Claims] 1. A retaining wall which is used for retaining soil, etc. and which is installed on the foundation ground of a retaining wall having a bottom plate with an anti-slip plate attached thereto while ensuring the action of the anti-slip plate. First, the anti-slip plate is manufactured in a state where a part of the reinforcing bars of the reinforcing bars are exposed on the upper surface for connection, and embedded in the foundation ground with the exposed reinforcing bars exposed. ,
In the bottom slab, a semi-finished retaining wall having an uncast concrete part where some of the reinforcing bars of the bar are exposed is inserted, and the exposed reinforcing bar of the anti-slip plate is inserted into the uncast concrete part, and the sliding Placed on the embedding part of the prevention plate, then exposed connecting reinforcing bar exposed from the anti-slip plate, and exposed reinforcing bar of bottom slab reinforcement exposed in the uncast concrete part of the semi-finished retaining wall In addition to connecting the and, the cast-in-place concrete is placed in the unplaced part of the bottom slab of the semi-finished retaining wall, the semi-finished retaining wall and the anti-slip plate are integrated to complete the retaining wall, and the sliding A method of installing a retaining wall with an anti-slip plate, characterized in that a retaining plate is used to prevent the retaining wall from sliding. 2. A semi-finished retaining wall has a bottom slab on which non-cast concrete is placed partially, and the bottom slab is reduced on the non-cast concrete portion to lower the center of gravity, thereby placing the slide slab on the anti-slip plate embedded portion. 2. The method for installing a retaining wall with an anti-slip plate according to claim 1, wherein the semi-finished retaining wall is enhanced in independence and stability when placed and the on-site work such as concrete placing is reduced. 3. The method for installing a retaining wall with a non-slip plate according to claim 1, wherein the non-concrete portion of the bottom slab in the semi-finished retaining wall extends over the entire surface of the bottom slab. 4. The bottom slab rebar exposed in the uncast concrete part of the slab in the semi-finished retaining wall does not penetrate horizontally through the uncast concrete part but only horizontally protrudes into the uncast concrete part. In the state of, through the reinforcing bar that is newly reinforced for the bottom slab into the concrete unplaced part, the bottom plate reinforcement protruding into the concrete unplaced part, and the connecting reinforcing bar exposed from the anti-slip plate The method for installing a retaining wall with an anti-slip plate according to claim 1 or 2, further comprising: 5. The method for installing a retaining wall with an anti-slip plate according to claim 1, wherein a plurality of the anti-slip plates are integrated with the bottom plate of the semi-finished retaining wall.