JPH0438253B2 - - Google Patents

Description

[Detailed Description of the Invention] <<Field of Industrial Application>> The present invention relates to a method of joining a continuous underground wall and a building, and in particular, when the continuous underground wall is used as the main wall of a building. This article relates to a method of joining a connecting part of an inner wall and a building.

<<Prior Art>> As is well known, an earth retaining wall is constructed when constructing a basement floor of a building, and a continuous underground wall construction method is used as a method for constructing this earth retaining wall.

In the continuous underground wall construction method, a groove-shaped excavation hole is usually formed, a reinforcing bar cage is erected in the excavation hole, and concrete is poured to form a panel-shaped wall, which is successively installed laterally. By connecting them, a continuous underground wall is constructed.

In this type of continuous underground wall construction method, it is not possible to ensure a direct connection between the reinforcing bars at the connections between the panels, which becomes a structural weakness.

Therefore, for example, as seen in Japanese Patent Publication No. 47-3310, a box with a pull-out plate that can be pulled out is attached to one end of the reinforcing bar cage, and when the trailing reinforcing bar cage is erected, the inside of the box is A method is provided in which the ends of leading and trailing rebar cages are overlapped to reinforce the strength of the connection.

By the way, a continuous underground wall constructed by the method described above is sometimes used as the main wall of a building, but in this case, it is difficult to connect the continuous underground wall to the slab of the building. be exposed.

As this type of joining method, for example,
There is a technique disclosed in Publication No. -47334.

In the joining method disclosed in this publication, when constructing a continuous underground wall, a corrugated joining iron plate with reinforcing bars for joining is inserted and fixed is attached to the part of the reinforcing bar cage located on the building side. After constructing the continuous underground wall, the inside of the continuous underground wall is excavated to expose the joining iron plate, and the joining reinforcing bars are connected to the reinforcing bars of the building.

However, although this type of joining method is effective for general parts of continuous underground walls except for connecting parts, it cannot be applied to connected parts of continuous underground walls, especially parts where reinforcing bar cages overlap each other. In this case, the following problem occurred.

<<Problems to be Solved by the Invention>> In other words, if the joining method of the above-mentioned publication is applied to a portion where the ends of reinforcing bar cages overlap, the joining iron plate will be attached to the outside of the overlapping reinforcing bars. However, with this method, it was not possible to connect the reinforcing bars on the inside of the overlap with the reinforcing bars of the building, so there was a problem that this became a structural weakness of the building.

This invention was made in view of such conventional problems, and its purpose is to connect the reinforcing bars of the connection part of a continuous underground wall and the reinforcing bars of a building, thereby improving the structure of the building. An object of the present invention is to provide a method of joining a continuous underground wall and a building without causing any weak points.

<<Means for Solving the Problems>> In order to achieve the above object, the present invention provides an underground wall panel in which a box is attached to the end of a reinforcing bar cage, and the underground wall panels are connected and formed laterally within the box. After constructing a continuous underground wall by overlapping reinforcing bar cages with each other, when excavating the area surrounded by this continuous underground wall and constructing a building inside it, this building and the continuous underground wall are constructed. In the method of integrally joining an underground wall, on the side of the continuous underground wall where the building is constructed, a portion where the reinforcing bar cages overlap each other, and a portion located outside of this overlapping portion. Box cuttings, some or all of which can be removed, are inserted between the reinforcing bars and the box, and when excavating the inside of the continuous underground wall after construction, these box cuttings are inserted. It is characterized in that the connecting reinforcing bars of the reinforcing bar cage located inside the overlapping portion are removed and the horizontal reinforcing bars of the building are joined.

≪Operation≫ According to the joining method with the above configuration, box cutting materials, at least a portion of which can be removed, are inserted between the overlapped part of the reinforcing bar cages and between the reinforcing bars on the side where the structure is to be constructed and the excavated wall surface. Since it has been inserted, if the box cutout is removed, the horizontal reinforcing bars located inside the overlapped area will be exposed, and this can be joined to the horizontal reinforcing bars of the building.

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

1 to 7 show an embodiment of the method of joining a continuous underground wall and a building according to the present invention.

In the joining method shown in FIG. 1, first, a continuous underground wall 10 is constructed as shown in FIG.

In constructing the continuous underground wall 10, first, groove-shaped advance excavation holes 12 are excavated to a predetermined depth at predetermined intervals in the lateral direction while filling with muddy water.

Next, in the preceding drilling hole 12, a preceding reinforcing bar cage 1 is placed.
4 will be built.

The preceding reinforcing bar basket 14 includes two sets of horizontal reinforcing bars 14a arranged substantially parallel to each other at a predetermined interval, vertical reinforcing bars 14b fixed to the horizontal reinforcing bars 14a, and connecting reinforcing bars 14c connecting these reinforcing bars 14a and 14b. A pair of boxes 18 are attached in advance at a predetermined distance from the edges of the horizontal reinforcing bars 14a.

This box 18 has a pair of side plates 18a, 18a.
, a partition plate 18b, and a pull-out plate 1 that can be pulled out.
8c.

The horizontal reinforcing bars 14a of the preceding reinforcing bar basket 14 penetrate the partition plate 18b of the box 18 and protrude into the box 18.

When the preceding reinforcing bar basket 14 is installed in the preceding drilling hole 12, the partition plate 18b of the box 18 in the drilling hole 12,
Concrete is placed between 18b to form the preceding panel 20.

When the preceding panel 20 is formed, the preceding panel 2
A trailing drill hole 22 is excavated between 0 and 20.

Next, the pullout plate 18c is removed and the trailing reinforcing bar basket 24 is built into the trailing excavated hole 22.

The trailing reinforcing bar cage 24, like the preceding reinforcing bar cage 14, includes horizontal reinforcing bars 24a, vertical reinforcing bars 24b, and connecting reinforcing bars 2.
4c, and its horizontal reinforcing bars 24a
The distance between both ends of the reinforcing bars 14a is narrower than the width of the horizontal reinforcing bars 14a on the preceding side, and the reinforcing bars 14a are installed so as to overlap each other at the portion partitioned by the box 18.

When the trailing reinforcing bar basket 24 is erected as described above, concrete is poured into the trailing excavation hole 22 and the box 18, and the trailing panel 30 connected to the leading panel 20 is formed.

The construction method of such a continuous underground wall 10 is the same as the conventional construction method of this type, but the joining method shown in this embodiment is characterized by the following points.

That is, in this embodiment, as shown in FIG. 2, in order to use the constructed continuous underground wall 10 as the main wall of the building, a slab 32 of the building is constructed, so that the continuous underground wall 10 is used as the main wall of the building. On the side of the wall 10 on which the structure is to be constructed, first and second box cutouts 34 of two different structures, partially or completely removed, are placed in advance at the locations shown in FIGS. 3 to 5. , 34a are installed.

These box-cutting members 34, 34a have a so-called box-cutting structure, and in this embodiment, they are installed in both the general portion and the connecting portion of the continuous underground wall 10.

In the general part, the connecting reinforcing bars 14c, 24c of the leading and trailing reinforcing bar cages 14, 24 in the part corresponding to the location where the slab 32 of the building is installed.
A pair of first box cutouts 34 are installed in the upper and lower two stages.

This first box blank 34 is composed of a joined iron plate 36 bent into a substantially concave shape, and a filler 38 such as styrofoam filled in the joined iron plate 36,
The tip of each connecting reinforcing bar 14c, 24c is connected to the iron plate 36
It is installed through the

The box cutout material 34 is extended over the entire length between the connecting portions of the continuous underground wall 10.

On the other hand, the connecting part of the continuous underground wall 10 is attached to the connecting reinforcing bars 24c of the trailing reinforcing bar cage 24, and the horizontal reinforcing bars 14 of the leading and trailing reinforcing bar cages 14, 24
A first box cutout material 34 consisting of a joining iron plate 36 and a filler material 38 located at the location where the a and 24a overlap; Vertical reinforcing bars 14b and box 18
A second box cut-out material 34, which is located between the
A is provided.

The first box cutout material 34 of the connection part is also connected to the upper and lower two stages of connecting reinforcing bars 24c by joining the iron plate 36 as in the general part.
It penetrates each.

In addition, the second box cutout material 34a is made by bending the iron plate 40 into a substantially concave shape and is fixed to the side plate 18a of the box 18, so that the inside is hollow, but in this case also, a filler such as styrofoam is used. 38 may be filled.

Now, when the continuous underground wall 10 in which the first and second box cutouts 334 and 34a are installed at appropriate locations is constructed as described above, the excavation within the portion surrounded by the continuous underground wall 10 is completed. will be held.

When the excavation is completed to the part where the box cutting materials 34, 34a are installed, or when the internal excavation is completed, first, the filler material 38 of the first box cutting material 34 in the general part of the continuous underground wall 10 is is removed.

As a result, the continuous reinforcing bars 14 in the general parts of the reinforcing bar baskets 14 and 24 buried in the continuous underground wall 10
The ends of c and 24c are exposed.

Next, the side plate 18a of the box 18 at the portion of the second box blank 34a to which the iron plate 40 is fixed is melted and partially removed together with the iron plate 40.

Afterwards, after peeling off the concrete on the front side of the first box cutout 34 to expose it,
Filler 38 is removed.

As a result, the ends of the connecting reinforcing bars 24c buried in the connecting portion of the continuous underground wall 10 are exposed.

When each end of the connecting reinforcing bars 14c, 24c is exposed as described above, they are connected to the horizontal reinforcing bars 42 buried in the slab 32 of the building by gas pressure welding, etc., and concrete lead is poured. Build the slab 32 (see Figures 6 and 7).

The slab 32 constructed in this way has not only the general part of the continuous underground wall 10 but also the connection part with the connecting reinforcing bars 24c buried in the continuous underground wall 10.
Therefore, when using the continuous underground wall 10 as the main wall of construction, the construction and continuous underground wall 10
The integrity of the structure is strengthened and structural defects are eliminated.

In the above embodiment, the first box cutout 34 is made up of a bonded iron plate 36 and a filler 38, and the second box cutout 34a is made up of an iron plate 40. For example, the entire cutout material may be made of styrofoam, and the box cutout material may be completely removed.

<<Effects of the Invention>> As explained in the embodiments above, according to the method for joining a continuous underground wall and a building according to the present invention, there is no blank space when joining a continuous underground wall to a building constructed after formation of the continuous underground wall. It is possible to construct a structure in which all parts are joined together with the same strength.

This also strengthens the connection parts, which are the weak points in the structure of continuous underground walls, and improves the rigidity of the entire structure.

[Brief explanation of drawings]

Figures 1 to 7 show an embodiment of the joining method according to the present invention, Figure 1 is an explanatory diagram showing the method for constructing a continuous underground wall in the order of steps, and Figure 2 is a diagram showing the construction method of a continuous underground wall. An explanatory diagram of the positional relationship with the building, Figure 3 is a horizontal cross-sectional view of the continuous underground wall that was constructed, and Figure 4 is the
Figure 5 is a sectional view taken along line A-A in the figure, Figure 5 is a cross-sectional view taken along line B-B in Figure 3, Figure 6 is an explanatory diagram of the state of connection between the general part of the continuous underground wall and the building, and Figure 7 is the continuous underground wall. It is an explanatory view of the joint state of the connection part of an inside wall, and a building. 10...Continuous underground wall, 12...Advanced drilling hole, 1
4... Leading reinforcing bar basket, 18... Box, 20... Leading panel, 22... Trailing excavation hole, 24... Trailing reinforcing bar cage, 30... Trailing panel, 32... Slab, 34
...Box cutting material, 42...Horizontal reinforcing bar.

Claims (1)

[Claims] 1 A box is attached to the end of the reinforcing bar cage, and after building a continuous underground wall by overlapping the reinforcing bar cages of the underground wall panels that are connected laterally within the box, this continuous In a method of integrally joining the structure and the continuous underground wall when excavating a part surrounded by the underground wall and constructing a structure inside it, the construction of the continuous underground wall On the side where the object is being constructed, there is a box cutout that can be partially or completely removed between the part where the reinforcing bar cages overlap each other, and the reinforcing bar located outside of this overlap part and the box. When excavating the inside of the continuous underground wall after constructing it, these cut-out materials are removed and the reinforcing bars for connecting the reinforcing bar cage located inside the overlapped part and the above-mentioned A method for joining a continuous underground wall and a building, which is characterized by joining horizontal reinforcing bars of the building.