JPH055970B2 - - Google Patents

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 in particular, when constructing an earth retaining wall using soil concrete, This article relates to a construction method for an underground external wall when it is established as a permanent 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 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. is complex and therefore has a significant impact on construction costs.
It is inevitable that building costs will rise. 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. Because it cannot be used, its strength is low, and its reliability is poor.
Walls made of soil concrete can only be used as retaining walls for temporary construction of minor structures.
It is not used as is for the outer wall of the structure. 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 method of reinforcing soil concrete walls with steel members. The gist of this method is to form a permanent structure by forming a unit and connecting the units through the steel members. The present invention relates to a method for constructing an underground external wall of a building, and particularly relates to a process of constructing a wall using multiple soil concrete pile bodies at the external wall position of a building, and a process of constructing a wall using a plurality of soil concrete pile bodies at the position of the external wall of a building. A process of inserting members to form a unit, a process of sequentially connecting each unit, a process of removing soil concrete to form a connection space within the concave connection part formed at the end of the unit, and each connection space. It is characterized by including the step of inserting a connecting member into the section, filling it with concrete, and joining each unit. As a result, although the underground external wall of the present invention is basically a wall made of soil concrete, it is surrounded by steel members and has structural strength, and can be adopted as a permanent structure for the underground external wall. You can also:
This method 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 pile bodies is installed from the ground at the outer wall position of the building. Build your body. This construction method uses a hollow shaft auger with a spiral 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.
At this time, when multiple augers are used, the rotary excavated cross sections of the augers are successively overlapped to form a soil concrete wall. Next, a main body member made of steel is inserted into the uncured soil concrete to form a wall unit. This steel main member is formed into a box shape by placing two steel plates facing each other and joining them near the ends with end plates, corresponding to the effective thickness of the soil concrete wall. The ends are provided with connection means between the main members, and when connected to the next one, the soil concrete is removed between the ends formed on the outer part of the end plate to form a connection space. . Next, a separately prepared connection member is inserted into this connection space, and the space is filled with concrete. 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, and the entire construction of the wall is completed. is 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, and 1 in Fig. 1 indicates the entire external wall;
2 is soil concrete, 3 is a main member made of steel plate, 4 is a connecting member, 5 is a unit formed for each main member 3, 1A is the exterior side of the building, 1
B is on the inside side.

Soil concrete 2 is formed by kneading 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. In the illustrated example, four augers are formed so that the wall thickness is a.

As shown in FIG. 2A, the main body member 3 is
Corresponding to the thickness a of the wall formed by the soil concrete 2, parallel side plates 31 with opposing spacing maintained,
31 and inwardly from both ends 32,
It consists of end plates 33, 33 which form the main body member 3 into a box shape by welding both side plates 31 apart, and the steel plates constituting each part are exaggerated in the illustration, but they do not buckle. It can be as thick as it is. End plate 33
Concave portions 34, 34 are formed on the outside of the recessed portions 34, and a fitting piece 35 is formed at one end 32 of the recessed portion 34 as a means for connecting to the next main body member 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.
, and the horizontal cross section is configured in a "king" shape, for example, and is inserted into the opposing concave portions 34 of the continuous units 5 with the same length as the main body member 3. 6 is the end of each unit 5, and the concave portion 3
A space at the connection end formed when the soil concrete 2 surrounded by the inside of the connection member 4 is removed; By appropriately arranging reinforcing bars around the space 6, a steel reinforced concrete column 8 is formed within the space 6 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 this example, I-beam steel, H-shaped steel
It may also be shaped steel or the like.

The construction of the above-mentioned underground outer wall 1 will be explained with reference to the process diagram of FIG. 3. In figure a, pile rows of soil concrete 2 are being driven from the ground, and in figure b, when the soil concrete 2 is still uncured, an inclinometer 9 is attached to the main body member 3 and lifted up. unit 5 is formed by inserting it accurately into the Thereafter, as shown in Figure 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. Hereinafter, returning to FIG. 1, the connecting member 4 is inserted into this 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 formed after the concrete and soil concrete harden. is completed.

Next, as shown in FIG. 1, the underground part of the building is excavated on the interior side 1B, and the arcuate section b of the soil concrete 2 on the interior side 1B is also removed to expose the inner surface of the exterior wall 1. . At this stage, the connecting plate 36 is attached to the fitting piece 35 of the end 32 of each unit 5.
The construction is completed by welding each unit 5 to form a continuous underground outer wall 1, and the outer wall 1 is connected to the main member 3.
The presence of the side plate 31 allows connection with the internal structural frame.

[Effects of the Invention] The present invention relates to a method for constructing an underground external wall in which a soil concrete wall is connected to an underground external wall portion, a process of constructing a wall using multiple soil concrete piles at the external wall position of a building, A process of inserting a steel box-shaped main body member into the wall 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. The process includes the process of forming connection spaces, the process of inserting connection members into each connection space, filling it with concrete, and joining each unit. Although it is a wall body, it is constrained by the main members to form a strong structure, and the connection part has built-in steel columns, improving the reliability of the structure and making it possible to extend the underground outer wall. It can be formed as a wall with structural strength, and since its inner surface is made of a steel plate, it can be easily connected and bonded to a structure inside a 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 pouring soil concrete, inserting the main steel members 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 provides a construction method for underground external walls that not only improves construction accuracy mainly due to the configuration of the connection means of the main body members, but also has excellent structural and waterproof properties due to integration by welding. It can be said that this is an invention that has a revolutionary effect on improvements.

[Brief explanation of drawings]

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, in which FIG. 1 is a horizontal cross-sectional view of the embodiment of the present invention, and diagram a in FIG. 2 is a perspective view of the main component. , b are perspective views of the connecting member, and figures a to c of FIG. 3 are schematic horizontal sectional views illustrating the construction process of the present invention. 1...Outer wall, 2...Soil concrete, 3...
...Main member, 4...Connection member, 5...Unit,
6...Space, 7...Concrete, 8...Column, 9
... Inclinometer, 21 ... Pile unit, 31 ... Side plate, 3
2... End portion, 33... End plate, 34... Concave portion, 3
5... Connection means, fitting piece, 36... Connection plate, 41
...H-shaped steel, 42...rib, a...effective thickness, b
...Arc part.

Claims (1)

[Claims] 1 In the method of constructing an underground external wall in which a soil concrete wall is connected to the external underground wall part, the process of constructing a wall using multiple soil concrete piles at the external wall position of a building, and the process of constructing a wall with a series of soil concrete piles, and a steel box-shaped structure inside the soil concrete wall. A process of inserting the main body member of the unit to form a unit, a process of sequentially connecting each unit, a process of removing soil concrete within the concave connection part formed at the end of the unit to form a connection space, each A method for constructing an underground exterior wall of a building, which includes the steps of inserting a connecting member into a connecting space, filling it with concrete, and joining each unit.