JPH01315519A - Underground outer wall constructing method for superstructure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method of constructing an outer wall of an underground part of a building, and particularly, when constructing an earth retaining wall using soil concrete, the retaining wall is permanently installed. This article relates to a construction method for an underground external wall when it is established as an underground external wall and used in a structure.

[Prior Art] A continuous underground wall is often constructed in the underground part of a building, used as a retaining wall for constructing the underground part, and used as an underground outer wall of the building. The basics of the underground continuous wall construction method is to excavate a continuous trench at the location where the wall is to be constructed, fill it with muddy water, pour underwater concrete, and place a reinforcing bar cage to construct the reinforced concrete wall. The basic structure of this construction method is well known, and the connection with the internal structural frame of the building is made by protruding the reinforcing bars inside the wall and connecting the steel. It consists of connections.

On the other hand, for relatively light buildings, a temporary retaining wall is constructed using soil concrete, the inside of which is excavated, and the building is constructed from the bottom.

Soil concrete is made by breaking down soil into coarse and fine aggregates, mixing them with cement and water, and is known for its pouring method, in which it is constructed at the same time as excavation.

[Problems to be solved by the invention] In conventional underground continuous walls, the reinforced concrete wall itself is an excellent structure, but it is difficult to carry out processes such as excavation, pouring concrete in muddy water, and connecting built-in reinforcing bars. The structure is complex and therefore has a considerable impact on construction costs, inevitably increasing the cost of the building. In addition, it was necessary to dispose of excavated soil, and it was not easy to manage muddy water.

Soil concrete walls are constructed directly from the ground into the soil as a series of piles, and continuous methods have also been developed, but soil concrete itself has low watertightness and cannot be completely watertight as an underground exterior wall of a building. 1) Because of its low strength and poor reliability, walls made of soil concrete are only used as retaining walls for temporary construction of minor structures, and are used as is for external walls as structures. The words that are done are not done. In addition, it is necessary to insert steel materials to reinforce soil concrete, but it is not suitable for inserting reinforcing bar cages, etc., and because wire rods such as H-beam steel must be inserted, stable dimensional accuracy cannot be obtained. Furthermore, soil concrete structures have no means of connection with the internal reinforced concrete structure that constitutes the building frame, and no method for transmitting stress has been developed. Therefore, soil concrete is not allowed to be used as a structure any more than a temporary material, and its application to underground structures has been an issue.

[Means for Solving the Problems] The present invention was developed with the aim of solving the above-mentioned problems, and is a unit in which walls made of soil concrete are reinforced with steel members. form,
The idea is to create a permanent structure by connecting the units through these steel members. The present invention particularly provides a method for constructing an underground outer wall of a building.
The process of constructing a wall using multiple soil concrete antibodies on the exterior wall of a building, the process of inserting a steel box-shaped main body member into the soil concrete wall to form a unit, and connecting each unit in sequence. step, a step of removing soil concrete in the concave connecting portion formed at the end of the unit to form a connecting space, a step of inserting a connecting member into each connecting space, filling it with concrete, and joining each unit. It is characterized by including. As a result, although the underground exterior wall of the present invention is basically a wall made of soil concrete, it is surrounded by steel members and has structural strength, so that it can be adopted as a single structure for the underground exterior wall. In addition, we succeeded in avoiding disadvantages in terms of structure and construction cost when constructing underground buildings.

[Function] When the present invention is applied to the construction of the underground part of a building, the function is that when constructing the underground part of the building, first, a wall made of multiple soil concrete antibodies is installed from above ground at the outer wall position of the building. Build your body. This construction method uses a hollow-shaft auger with a helical screw, and is carried out using the well-known method of injecting cement milk directly from the ground surface and mixing it with excavated soil to form soil concrete. When multiple augers are used, the rotary excavated cross sections of the augers are successively overlapped to form a soil concrete wall. Then, a steel main member is inserted into the uncured soil concrete to form a wall unit.This steel main member has a thickness corresponding to the effective thickness of the soil concrete wall. , two steel plates facing each other and connected by an end plate near the ends to form a box shape, and the ends are provided with means for connecting the main members to each other, and when connected to the next one. Next, soil concrete is removed between the ends formed on the outer parts of the end plates to form a connection space.Next, a separately prepared connection member is inserted into this connection space, and the concrete is poured into the space. After the soil concrete of the wall constructed in this way has hardened, the interior of the building is excavated, and steel plates are welded from the inside to the connecting ends of each main member. The entire construction work has been completed.

[Example] An underground outer wall constructed using the present invention will be described in detail based on an example shown in the drawings. Fig. 1 is a horizontal sectional view of an external wall adopting the present invention, showing a part of the underground external wall, in which 1 is the entire external wall, 2 is soil concrete, 3 is
4 is a main member made of a steel plate, 4 is a connecting member, 5 is a unit formed for each main member 3, LA is the outside side of the building, and IB is the inside side.

Soil concrete 2 is formed by mixing pile rows of single piles 21 directly into the soil at a predetermined depth from the ground level with soil and cement on the spot using a multiple auger, as shown in Figure 1. In this case, four augers are formed so that the wall thickness is a.

As shown in FIG. 2A, the main body member 3 includes parallel side plates 31 and 31 that are spaced apart from each other, corresponding to the thickness a of the wall formed by the fill concrete 2, and both ends thereof. It consists of an end plate 33.33 which is moved inward from the part 32 and welded with both side plates 31 spaced apart to form the main body member 3 into a box shape, and the steel plates constituting each part are exaggerated in the illustration. However, a concave portion 34,34 is formed on the outer side of the end plate 33, which need only be thick enough not to cause buckling, and the negative end portion 32 of the concave portion 34, 34 is formed with a thickness that does not cause buckling. A fitting piece 35 is formed as a connection means with 3. The height of the main body member 3 extends to the entire depth of the soil concrete 2, and it is inserted and buried in the soil concrete 2, and the inner surface of the box shape is preferably roughened as shown by the shadow line.

Next, the connecting member 4 is shown in a perspective view in FIG. The main body member 3 is placed inside the opposing concave portions 34 of the continuous units 5.
It is inserted with the same length as. (6) is the end of each unit 5, the space at the connection end formed when the soil concrete 2 enclosed inside the recessed part 34 is removed, and 7 is the space (6) filled. If the space 6 is made of ordinary concrete (or soil concrete) and appropriate reinforcing bars are placed around the connecting member 4, a steel-framed reinforced concrete column 8 will be formed to connect and support the units 5 on both sides. . Therefore, it is preferable that the outer surface of the connecting member 4 is also roughened. The connecting member is not limited to the one in this embodiment, and may be a ■-shaped steel, an H-shaped steel, or the like.

The construction of the above-mentioned underground outer wall 1 will be explained with reference to the process diagram shown in FIG. 3. In figure a, rows of soil concrete 2 piles are being driven from the ground, and in figure b.

When the soil concrete 2 is not yet hardened, an inclinometer 9 is attached to the main body member 3 and lifted up, and the unit 5 is formed by accurately inserting it into the soil concrete 2. Thereafter, in FIG. C, the soil concrete 2 in the concave portion 34 at the end formed by the connection of the units 5 is removed using a water jet or the like to form a space 6. Below, the first
Returning to the figure, the connecting member 4 is inserted into the space 6, the remaining part of the space 6 is filled with concrete 7 to form a column 8, and the outer wall 1 is completed through hardening of the concrete and soil concrete.

Next, as shown in FIG. 1, the underground part of the building is excavated at the inner side IB, and the arcuate section of the inner side IB of the soil concrete 2 is removed to expose the inner surface of the outer wall 1. . At this stage, the connecting plate 36 is welded to the fitting piece 35 of the end 32 of each unit 5 to prevent water from entering from the outside, and each unit 5 forms a continuous underground outer wall 1 to complete the construction work. Once completed, the outer wall 1 can be connected to the internal structural frame due to the presence of the side plates 31 of the main body member 3.

[Effects of the Invention] The present invention relates to a construction method for an underground external wall in which a soil concrete wall is connected to an underground external wall portion, a step of constructing a wall body using multiple soil concrete antibodies at the external wall position of a building, and a soil concrete wall. A process of inserting a steel box-shaped main body member into the body to form a unit, a process of sequentially connecting each unit, and a process of removing soil concrete within the concave connection part formed at the end of the unit and connecting it. The process of forming a space, the process of inserting a connecting member into each connecting space and filling it with concrete to connect each unit,
This is because it is implemented including.

First of all, although the wall is mainly made of soil concrete, it is constrained by the main members to form a strong structure, and the connecting parts have built-in steel columns, making it reliable as a structure. The underground outer wall can be formed as a wall body with structural strength, and since the inner surface is made of steel plate, it is easy to connect and connect with the structure inside the building. On the other hand, compared to the construction of conventional underground continuous walls, its construction has the advantage of being able to significantly reduce complex processes and construction costs.

In addition to placing soil concrete, the insertion of the #4I2 main component in the uncured stage is done using conventional methods, and does not require any special technology or equipment. There is no need to process water or use muddy water.

Furthermore, the present invention not only improves construction accuracy mainly through the configuration of the connection means of the main body members, but also improves the construction method of underground external walls by integrating them by welding. It should be said that this invention has a long-term effect.

[Brief explanation of the drawing]

The drawings are drawings showing an embodiment in which the method of constructing an underground outer wall of a building according to the present invention is adopted, and FIG. 1 is a horizontal sectional view of the embodiment of the present invention, and FIG. , b are perspective views of the connecting member, and figures a to 0 of FIG. 3 are schematic horizontal sectional views illustrating the construction process of the present invention. 1... Exterior wall, 2... Soil concrete, 3...
Main body member, 4... Connection member, 5... Unit, 6.
··space. 7... Concrete, 8... Column, 9... Inclinometer,
21...Single pile, 31...Side plate, 32...End part,
33... End plate, 34... Concave portion, 35... Connection means, fitting piece, 36... Connection plate, 41... H-shaped steel, 4
2... Rib, a... Effective thickness, b... Arc portion. Figure 2 Figure 3 (b) (C)

Claims (1)

[Claims] In the method of constructing an underground exterior wall in which a soil concrete wall is connected to the exterior basement wall, a process of constructing a wall made of multiple soil concrete antibodies at the location of the exterior wall of a building, a steel box-shaped main body within the soil concrete wall. A process of inserting members to form a unit, a process of sequentially connecting each unit, a process of removing soil concrete and forming a connection space within the concave connection part formed at the end of the unit, and each connection space. A construction method for constructing an underground exterior wall of a building, which includes the steps of inserting connecting members into the sections, filling them with concrete, and joining each unit.