JPH01315520A - Underground outer wall constructing method for superstructure - Google Patents

Abstract

PURPOSE:To use soil concrete for a permanent outer wall and make it connectible to a beam or the like by reinforcing a soil concrete wall with a steel member as in unitization, and installing a fold plate structural recess groove in a superstructure inner surface side faceplate. CONSTITUTION:A soil concrete wall is constructed from the ground, and a steel subject member 3 is inserted into soil concrete, forming each unit for the wall. In this subject member 3, there are provided with plural members of recess grooves 34 in side plates 31, 31. To connect a superstructure internal structural body of a beam or the like to the side plate, a reinforcing end of the body is anchored in the recess groove 34 when the body is made of concrete, and when it is made of steelwork, a gusset plate or a stud or the like is attached to the side plate 31, thus connection can be done.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method of constructing an outer wall, etc. of an underground part of a building,
In particular, when constructing an earth retaining wall using soil concrete, the retaining wall is established as a permanent underground external wall.
This relates to construction methods for underground walls when used in structures.

[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. 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.6 Soil concrete walls are built directly from the ground into the soil as a series of piles, and continuous methods have also been developed. Soil concrete itself has low watertightness and cannot completely stop water as an underground outer wall of a building, has low strength and is inferior in reliability, so walls made of soil concrete are not suitable for temporary construction of minor structures. It is only used for retaining walls for construction purposes, and is not used as is for external walls as structures. 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 it requires inserting wire rods such as H-beam steel, 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 gist of the project is to connect the units through these steel members to create a permanent structure that can be connected to the internal structural framework. The present invention relates to a method of constructing an underground external wall of a building, and particularly relates to a step of constructing a wall made of multiple soil concrete antibodies at the external wall position of a building, and a step of constructing a main member for forming an outer shell within the soil concrete wall. The main component includes a step of inserting the unit to form a unit, and a step of sequentially connecting each unit, and is characterized in that the main member has a face plate in which a concave groove of a folded plate structure is formed at least on the inner surface of the building. We also propose a method for connecting it to the internal structure of a building. As a result, although the underground wall of the present invention is basically a wall made of soil concrete, its main part is surrounded by steel members to provide structural strength, and as a permanent structure, it can be attached to the underground outer wall. In addition, it enabled a connection structure with the underground framework of the building, and succeeded in avoiding the disadvantages in terms of structure and construction cost of the underground continuous wall construction method.

[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 excavation sections of the augers are successively overlapped to form a soil concrete wall. Next, the main body member is inserted into the uncured soil concrete to form a wall unit.

This main member has two side plates facing each other corresponding to the effective thickness of the soil concrete wall, and the side plates have a folded plate structure and have a plurality of vertical grooves formed on the outer surface. It is formed into a box shape by being connected by a connecting plate near the parts, or at least has such a side plate on the inner surface of the building, and the side plate is connected to the internal structural frame of the building. This concave groove can also be used as a connection means. After the soil concrete of the wall constructed in this way has hardened, excavation is carried out on the inside of the building, the ends of each main body member are connected, and steel plates are welded from the inside. Construction is completed.

[Embodiment] An underground outer wall constructed using the present invention will be described in detail based on an embodiment 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
is a main body member made of a steel plate, 4 is a unit formed for each main body member 3, IA is the outside side of the building, and 1B 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 the soil and cement on the spot using a multiple auger, as shown in the figure. In this case, four augers are formed so that the wall thickness is a.

Figures 2a and 2b show details of the main body member 3.

The main member 3 is made up of two parallel side plates that maintain a facing interval corresponding to the thickness a of the wall formed by the soil concrete 2 and whose horizontal width corresponds to the unit length of the soil concrete 2. 31.31, and a connecting plate 33.33 which joins one side plate 31 inwardly from both end portions 32 and forms the main body member 3 into a parallel column shape,
A plurality of grooves 34 are formed in the side plate 31 in the longitudinal direction of the main body member 3.
It is formed. The groove 34 has a dovetail cross section that expands inside, and a protrusion 34a is provided on its outer surface to improve adhesion to the soil concrete 2 in the vertical direction. . At both ends 32, flanges 35 for connection are formed by bending. As shown in Fig. b, the coupling plate 33 has clamping portions 36 for attachment at both ends, and is attached and fixed to protrusions formed on the back surface of the groove 34 at two or more upper and lower ends. Both side plates 31 are joined at equal intervals. Although the steel materials constituting each part are illustrated in an exaggerated manner, they only need to be thick enough to allow welding without buckling.

The height of the main body member 3 is such that the side plate 31 on the inner surface side of the building extends continuously over the entire depth of the soil concrete 2, and is inserted and buried in the soil concrete 2.

On the external side IA of the exterior wall 1, as shown in the plan view in Figure 3a and the vertical sectional view in Figure 3b, the main member 3 has a height corresponding to the structural frame (for example, beam) 5 of each underground floor of the building. The side plate 31 can be provided only at the position, and only the inner side IB can be provided at the other intermediate portions.

Therefore, the coupling plate 33 does not exist in this part, and the external [I
The separated side plates 31 of A are connected by connecting members 6.

The construction of the above-mentioned underground outer wall 1 will be explained with reference to the process diagram shown in FIG. 4. In figure a, the 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 7 is attached to the main body member 3 and it is lifted. to form unit 4. The side plate 31 of the external side IA is a connecting plate 33
It is inserted into the soil concrete 2 as the side plate 31 of the inner side IB, which is connected to and supported by the connecting member 6 and is integrally and continuously formed, is lowered.

Next, as shown in FIG. 1, the inner side IB of the underground part of the building is excavated, and at this time, the arcuate section of the inner side IB of the soil concrete 2 is also removed. Outer wall 1
At the stage when the inner side of the person is exposed.

Each unit 4 is connected to the next unit 4 by welding a flange 35 and a separate connection plate 37, and at the same time blocks water permeation from the soil concrete 2, and after hardening, a continuous underground external wall 1 is formed. form and complete the construction.

Next, the connection with the internal structural frame (beam) 5 of the building will be explained with reference to FIG. FIG. 5 is a vertical sectional view of the outer wall 1, to which a beam 5 is connected.

In this example, a cut-and-raise connection means 38 is provided upward on the side plate 31 of the inner side IB in order to further improve the connection of the beam 5 with the concrete, and a part of the soil concrete 2 is 22 is formed. and,
Depending on the position of the beam 5, the end of the reinforcing bar 51 of the beam 5 may be connected to the side plate 3.
It is anchored in the concave groove 34 of 1. When the concrete for the beams 5 is poured to form the frame, the soil applied to the outer wall 1 acts on the beams 5 as a compressive force, and the concrete blocks 22 work effectively.

Furthermore, the cut and raised portions 38 do not create any resistance when the side plate 31 is inserted into the soil concrete 2. When the frame is a steel frame structure, the side plates 31 can be used to attach gusset plates, studs, etc. for connection.

[Effects of the Invention] The present invention provides a method for constructing an underground wall in which a soil concrete wall is connected to an external underground wall portion, a step of constructing a wall body using multiple soil concrete antibodies at an external wall position of a building, and a method for constructing a soil concrete wall. The method includes a step of inserting a main member for forming an outer shell into the body to form a unit, and a step of sequentially connecting each unit, and the main member forms a groove with a folded plate structure at least on the inner surface of the building. Firstly, although the wall is mainly made of soil concrete, it is constrained by the main material to form a strong 4R structure, which increases reliability. The underground outer wall can be formed as a wall body with structural strength, and since its inner surface is made of steel plates, it can be easily and reliably connected to the structural frame inside the building. Become.

On the other hand, its construction has the advantage of being able to significantly reduce the complicated process and construction costs required for constructing a diaphragm wall. 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 manage muddy water. Furthermore, the present invention not only improves construction accuracy mainly due to the configuration of the connecting means of the main body member.

This invention can be said to have a groundbreaking effect on improving construction methods for underground external walls, such as its superior structure and waterproofing due to its integration through welding.

[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 is a horizontal sectional view of the main part of the main body member, FIG. 3 shows another embodiment of the main body member, a is a plan view, b is a vertical sectional view thereof, and a and b in FIGS. The figure is a schematic vertical cross-sectional view for explaining the construction process of the present invention, and FIG. 5 is a cross-sectional view for explaining the connection between the main body member and the internal frame. 1... Exterior wall, 2... Soil concrete, 3...
Main member, 4... Unit, 5... Body part, beam, 6
...Connecting material, 21...Single pile, 22...Cotter, 31...Side plate, 32...End portion, 33...Connecting plate, 34...Concave groove, 35... Flange, 36... Holding part, 37... Connection plate, 38... Cut and raise, 51.
...Reinforcement bar, a...thickness of wall, b...circular part. Figure 1 Figure 2 Figure 4 Figure 5'+ Old

Claims (2)

[Claims] (1) In an underground exterior wall construction method in which a soil concrete wall is connected to an underground exterior wall portion, a step of constructing a wall made of multiple soil concrete antibodies at the exterior wall position of a building;
The steps include a step of inserting a main member for forming an outer shell into a soil concrete wall to form a unit, and a step of sequentially connecting each unit. A construction method for an underground exterior wall of a building, characterized by having side plates with grooves formed therein. (2) The method for constructing an underground external wall of a building according to claim 1, wherein the side plate of the main member or a groove formed in the side plate is used to connect to the internal structural frame of the building.