JP3625750B2 - Structure of the basement of the building - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of an underground part of a building which is a basic part of various building structures to be constructed.
[0002]
[Prior art]
Conventionally, when constructing an underground part of a building (see FIGS. 4 and 5), an earth retaining wall called SMW (soil mixing wall) is excavated in the ground and along the groove 1 formed by excavation. Temporarily set 2 to receive earth pressure and water pressure from the groove 1 side. The retaining wall 2 is a groove formed by excavation, which is made of H steel as a stress material that receives earth pressure and water pressure, and cement-based solidified material (mixture of excavated soil and cement) as a water-stopping material. In addition, H steel is arranged side by side, and a cement-based solidifying material is poured into the lower end portion of the H-steel and a cement-based solidifying material is poured into the other portions.
[0003]
And the pillar 4 is built in the underground space 3 enclosed with the retaining wall 2, and concrete and a slab are laid, and the underground frame 5 is constructed. When the construction of the underground frame 5 is completed, the retaining wall 2 is only temporary and is removed, but it is buried as it is as an example of the current situation in consideration of costs and the like.
[0004]
However, in this situation, the retaining wall has not been used effectively after the construction of the underground frame, and the civil engineering and construction industries have thought that there is a way to effectively use the retaining wall 2.
[0005]
Therefore, it was considered that the retaining wall 2 could not be used as a part of the underground frame 5, and the use as a part of the wall 6 as a composite wall was considered. When the retaining wall 2 is not used as a part of the wall 6, the wall thickness must be increased to obtain a predetermined wall thickness, but by using the retaining wall 2 as a part of the wall 6, The required wall thickness can be reduced. Thus, the retaining wall 2 has been conventionally used for the purpose of reducing the wall thickness of the underground frame 5.
[0006]
However, the inventors of the present application considered that the retaining wall 2 could not be used more effectively and developed the present invention as a result of various studies.
[0007]
[Problems to be solved by the invention]
The present invention makes it possible to use an underground wall having a function as a retaining wall when constructing an underground part of a building as an outer wall in the building as well as a support pile, thereby reducing construction costs. The purpose is to provide the structure of the underground part of the building.
[0008]
[Means for Solving the Problems]
In order to effectively achieve the above object, the present invention has the following configuration. That is, the structure of the underground part of the building according to the first aspect of the present invention includes a plurality of underground walls made of a plurality of steel materials embedded in the ground and a plurality of underground walls formed along the underground space forming side. The lower end of the column is located above the lower end of the underground wall and supports the vertical load of the ground part of the building, the beam connecting the lower ends of each column, the beam and the underground wall It is the structure characterized by comprising the connection part which connects only between between bodies with an axial force transmission member, and transmits the vertical load concerning a column to the underground wall body below a beam body installation position.
[0009]
The structure of the underground part of the building according to claim 2 is the structure of the underground part of the building according to claim 1, wherein the underground wall body above the connection part constitutes at least a part of the outer wall of the underground part. It is the structure characterized by.
[0010]
The structure of the underground part of the building according to claim 3 is the structure of the underground part of the building according to claim 1 or 2, wherein the lower end portion of the underground wall body is located in the support layer. It is.
The structure of the underground part of the building according to claim 4 is the structure of the underground part of the building according to claim 1, wherein the underground wall body includes a steel material arranged in the excavation formation groove, and excavated soil. Cement-based solidification material mixed with cement and cast in the excavation formation groove around H steel, and cement-based solidification material cast around the lower end of H steel and stronger than the cement-based solidification material It is the structure characterized by consisting of.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram of the structure of the underground part of the building of the present invention, FIG. 2 is an explanatory diagram showing the connecting part according to the present invention, and FIG. 3 is a plan view of the structure of the underground part of the building of the present invention. It is explanatory drawing.
[0012]
In these drawings, reference numeral 8 denotes an underground space formed by excavating the formation 9 and having a rectangular parallelepiped shape, for example, and an underground wall 11 is formed along the excavation formation groove 10 so as to surround the underground space 8. .
[0013]
The underground wall body 11 has a function as a support pile or a friction pile as well as a function as a conventional retaining wall, and is the same as the SMW, and H as a stress material that receives earth pressure and water pressure. The steel 12 (see FIGS. 1 and 3) was juxtaposed along the excavation formation groove 10, and a cement-based solidifying material 13 (mixed with excavated soil and cement) as a water-stopping material was cast and hardened. During excavation in the ground, it functions as a retaining wall body that receives earth pressure and water pressure received from the excavation forming wall 10 side. The lower end portion 14 of the underground wall body 11 is embedded in the support layer 15 in the illustrated example. Note that a cement-based rooting material having a higher strength than the cement-based solidifying material 13 is placed at the lower end of the H steel.
[0014]
In the underground space 8 surrounded by the underground wall body 11, a plurality of column bodies 18 are disposed so that the lower end 17 is positioned above the lower end 16 of the underground wall body 11. The lower end portions 19 of the column bodies 18 are connected by beam bodies 20.
[0015]
Further, the beam body 20 (and the column body 18) and the ground are connected so that the vertical load applied to the column body 18 can be transmitted to the underground wall body 11 below the beam body installation position by connecting the beam body 20 and the connecting portion 21. The intermediate wall body 11 is connected and integrated by a connecting portion 21. The connecting portion 21 is connected by embedding a plurality of axial force transmission members (stud gibber or the like) 22 (see FIGS. 2 and 3), which protrude in a horizontal direction from the side surface of the underground wall body 11, in the beam body 20. It is the place that was done.
[0016]
Further, an outer wall 23 is formed on the underground space 8 side along the underground wall body 11. As described above, the underground wall 11 according to the present invention is formed so as to have a function as a support pile or a friction pile as well as a function as a conventional retaining wall. It is a much better structure. Therefore, the outer wall 23 may be thinner than the conventional wall. Reference numeral 24 denotes a support pile driven into the support layer 15 from the center of the underground space 8. Since the underground wall body 11 has a function as a support pile, it is not necessary to drive a support pile along the underground wall body 11 as in the prior art.
[0017]
In the structure of the underground part of the building having the above-described configuration, a vertical load is borne by the part of the underground wall body 11 below the connecting part 21, and the soil is generated by the part of the underground wall body 11 above the connecting part 21. The horizontal force due to pressure and water pressure will be borne. Therefore, the section where the axial force (vertical load) on the underground wall body and the horizontal force act simultaneously becomes extremely small, and there is no need to consider buckling, and the underground wall body 11 is used as a retaining wall and as a support pile. can do.
[0018]
In addition, you may provide the lower end part 14 of the underground wall 11 so that it may be located above the support layer 15, without being embedded in the support layer 15 like the example of illustration. The other structure in this case is the same as the above example.
[0019]
【The invention's effect】
As is clear from the above description, in the underground structure of the building of the present invention, the underground wall body made of a plurality of steel materials embedded in the ground and the beam body connecting the column bodies are connected, The vertical load applied to the column is transmitted to the underground wall below the beam installation position, so there is no need to consider buckling of the underground wall, and earth and water pressures are Can be received with a medium wall. Therefore, the underground wall body can be used effectively as a support pile as well as a conventional retaining wall, and the number of support piles can be reduced compared to the conventional case, thereby reducing the construction cost.
[0020]
In addition, by constructing the underground wall above the connecting part as at least a part of the outer wall of the underground part, it is only necessary to construct the outer wall of the underground part thinner than the conventional outer wall. It can contribute to the reduction of construction and the shortening of construction, and the construction cost can be reduced.
[0021]
Moreover, the function as a support pile can be improved more because the lower end part of an underground wall body is located in a support ground.
In addition, the underground wall body made of steel, cement-based solidified material and cement-based rooting material has a function as a support pile or a friction pile as well as a retaining wall, and during excavation in the ground, an excavation forming wall Can receive earth pressure and water pressure from the side.
[0022]
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a structure of an underground part of a building according to the present invention.
FIG. 2 is an explanatory diagram of a connecting portion according to the present invention.
FIG. 3 is an explanatory diagram viewed from above the structure of the underground part of the building of the present invention.
FIG. 4 is a simplified explanatory diagram of the structure of the underground part of a conventional building.
FIG. 5 is an explanatory diagram of a structure of a basement of a conventional building.
[Explanation of symbols]
8 underground space 11 underground wall 14 lower end 15 of underground wall body support layer 16 lower end 18 of underground wall body column 19 lower end part 20 of column body beam 21 connection part
22 Axial force transmission member 23 Outer wall of basement

Claims (4)

A plurality of underground walls made of a plurality of steel materials buried in the ground, and a plurality of underground walls arranged along the underground space forming side of the underground walls, the lower ends of which are located above the lower ends of the underground walls and The column that supports the vertical load on the ground, the beam that connects the lower ends of each column, and the beam and the underground wall are connected to the column by the axial force transmission member only . A structure of an underground part of a building, comprising a connecting part for transmitting a vertical load to an underground wall below the beam installation position. The underground structure of a building according to claim 1, wherein the underground wall body above the connecting portion constitutes at least a part of an outer wall of the underground portion. The structure of the underground part of the building according to claim 1 or 2, wherein a lower end portion of the underground wall body is located in a support layer.   The underground wall body includes a steel material arranged in parallel in the excavation formation groove, a cement-based solidified material mixed with excavation soil and cement, and placed in the excavation formation groove around H steel, and H 2. The structure of the underground part of a building according to claim 1, wherein the structure is composed of a cement-based solidifying material cast around the lower end of the steel and having a stronger strength than the cement-based solidified material.

Images