JPH08109631A - Underground wall - Google Patents

Abstract

PURPOSE: To use H-shaped steels connecting joints excellent in cut-off efficiency as core materials to facilitate the manufacturing, execution and reinforcement. CONSTITUTION: In a plurality of soil cement columns 5 erected and overlapped to each other widthwise of a wall, and the underground wall is constituted of a plurality of H-shaped steels 2 erected to hold a female joint 13 connected to a flange of one H-shaped steel and a male joint 14 connected to a flange of the other H-shaped steel each other. Accordingly, the underground wall with a high rigidity excellent in cut-off efficiency is obtained in a narrow space. In addition, the joints are provided to the insides of the flanges of the H-shaped steels, so that an earth retaining wall or a bearing wall having a flat surface of exposure is obtained, and it can be easily reinforced. When an H-shaped connection body connecting the flanges of a plurality of H-shaped steels to each other is used, the necessary number of joints and the number of erection is reduced to economize.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground wall used as an earth retaining wall, a bearing wall, a foundation, etc., especially in the field of civil engineering and construction, and particularly to an underground wall of a structure requiring a large bearing capacity. It is about.

[0002]

2. Description of the Related Art First, a method of constructing an underground wall will be described. First, soil cement is injected while excavating the ground with an auger, and at the same time, soil cement and earth and sand are stirred to form a soil cement wall. Then, the core material is set up in the wall of the soil cement before the soil cement hardens. These excavations, pouring of soil cement, and raising of core material are repeated to construct the underground wall. Therefore,
The underground wall is composed of solidified soil cement pillars and a plurality of core materials standing upright in the pillars. These core materials may be connected to each other or may be erected separately from each other.
Shaped steel, steel pipe sheet pile, square steel sheet pile, etc. were used. However, since rolled steel sheet pile does not have sufficient strength against bending,
It cannot be used for underground walls of structures that require a large yield strength.

Further, when the underground wall composed of core materials interconnected with each other is used as a retaining wall, a load bearing wall, etc., the earth and sand on one side divided by the underground wall or surrounded by the underground wall is used. Excavate and remove. In this earth and sand excavation and removal work, both the earth and sand on the excavation side and the soil cement column are excavated, and the soil cement is stripped from the core material, so one side of the core material is exposed after the earth and sand excavation and removal. Therefore, as the excavation work of earth and sand progresses, the underground wall will be pushed by the earth pressure, water pressure, etc. from the side where the earth and sand have not been removed to the side where the earth and sand have already been removed. Then, to support the underground wall, columns are reinforced at certain intervals. Since this pillar supports a plurality of core materials collectively, a beam (referred to as abdomen upset) that is installed horizontally along the core material in the standing direction of the core material and the uprighting of the core material through the abdomen uplifting. It consists of a beam (referred to as a girder) that is installed at a right angle to the installation direction.

FIG. 5 is a cross-sectional view showing one construction of an underground wall using a conventional H-section steel. In the figure, 2 is an H-shaped steel,
5 is a soil cement pillar and 6 is earth and sand. The cross section of H-section steel is optimally designed mainly from the bending moment and axial force applied to the flange, and the shearing force and axial force mainly applied to the web, and the plate thickness of the flange and the web is determined. There is. Further, since the H-section steels are erected at predetermined intervals, they are separated from each other (hereinafter,
"Prior art 1").

FIG. 6 is a cross-sectional view showing another structure of the underground wall using the conventional steel pipe sheet pile. In the figure, 61 is a steel pipe sheet pile, 62 is a steel pipe, 63 is a female joint, 64 is a male joint, 5
Is a soil cement pillar, and 6 is earth and sand. The joints 63, 6
4 are adhered to the outer peripheral portion of the steel pipe 62 at diagonal positions. In this example, steel pipe sheet piles 61 in which a female joint is attached to one location on the outer periphery of the steel pipe and a male joint is attached to its diagonal position are sequentially erected and held together, but only the female joint is in the diagonal position. A steel pipe sheet pile 65 adhered to the above and a steel pipe sheet pile 66 in which only the male joint is adhered in a diagonal position are alternately erected, and an underground wall in which both male and female joints are held can be formed. In this example, a steel plate formed into a substantially C-shape or a partially cut steel pipe and a bar steel formed into a substantially T-shape or a joined steel plate were used as female and male joints, respectively. It is also possible to cut into half and bond the fitting joints on both side edges to the steel pipes respectively, and use these as the female and male joints (hereinafter referred to as "prior art 2").

FIG. 7 is an explanatory view showing a method of reinforcing an underground wall in the prior art 2. In the figure, 71 is a crossbeam, 72
Is angry and 73 is stuffed concrete. When excavating and removing the earth and sand on the inner side surrounded by the underground wall that is partitioned by the underground wall, the one side of the steel pipe 62, which is the core material, is exposed when used as an earth retaining wall or a bearing wall. It becomes a wavy wall. Therefore, this underground wall is cut into beams 7
In order to increase the apparent contact area between the beam (referred to as abdomen waving) 72 installed orthogonally to the steel pipe 62 and the steel pipe 62 when the steel pipe 62 is supported and reinforced by 1, the waving up 72 and the steel pipe 62 are formed, for example. Concrete (referred to as filling concrete) 73 is filled in the corrugated gap.

Further, in the underground wall using the conventional square steel sheet pile, a male and female joint consisting of a half of a straight steel sheet pile is attached to the parallel flange portion of the square steel pipe having the same thickness over the entire circumference. There is an example of an underground wall in which square steel sheet piles formed by joining them are erected while holding these male and female joints together. Since these joints are formed by bulging by rolling on both side edges of the straight steel sheet pile, their joint shape and size are limited, and moreover they project outward from the outer surface of the flange including the straight steel sheet pile. Therefore, there is a protrusion on the side surface of the core material of the underground wall in this example, and it is not flat. As a similar conventional example,
For example, Japanese Examined Patent Publication No. 3-76370 and Japanese Patent Laid-Open No. 63-31
2413, JP-A-63-31414, JP-A-63-71241 and JP-A-2-15635 (hereinafter referred to as "Prior Art 3").

Furthermore, when excavating and removing the earth and sand on one side or surrounded by the underground wall of Prior Art 3 to use as a retaining wall, a bearing wall, etc., one side of a square steel sheet pile as a core material Because it is exposed, it becomes a wall surface with protrusions at certain intervals. Therefore, when reinforcing this underground wall, for the purpose of apparently increasing the contact area between the beam (referred to as bellows) installed orthogonally to the square steel sheet pile and the square steel sheet pile, for example, the bellows and the square steel sheet. The gaps between the sheet piles are filled with filling concrete or steel pieces.

Further, for example, JP-A-57-151725.
There is an underground wall using a rectangular steel sheet pile formed by attaching a web to the linear steel sheet pile by sufficient welding bonding and using a linear steel sheet pile as a flange member, which is disclosed in Japanese Patent Laid-Open Publication No. 2003-242242.
Also in this example, as in the case of the prior art 3, since the joint portion is formed by bulging on the side edge portion of the straight steel sheet pile, the joint shape and size are limited, and a part of the joint is further formed. Protrudes more outward than the outer surface of the flange including the straight steel sheet pile, so the side surface of the core material of the underground wall of this example has a protrusion and is not flat (hereinafter referred to as "Prior Art 4").

Furthermore, for example, a plurality of special rolled H-shaped steel sheet piles formed by bulging male joints on both side edges of the flange, as disclosed in Japanese Patent Laid-Open No. 63-45844, are used. There is an underground wall that uses square steel sheet piles formed by butt-welding each other. In this example, a twin-engagement type female joint that holds the male joint is used to connect the rectangular steel sheet piles. The twin-engagement type female joint has a substantially H-shaped cross section, and one of the grooves is closely fitted to the male joint on the side to be welded and the other groove is tightly fitted to the male joint on the side to be connected. Therefore, as in the prior arts 3 and 4, the shape and size of the joint are limited, and a part of the female joint projects further outward than the outer surface of the flange. The side surface of the core material has protrusions and is not flat. (Less than,
"Prior art 5").

FIG. 8 shows, for example, Japanese Patent Application Laid-Open No. 55-165320.
It is a cross-sectional view which shows the structure of the underground wall which used the conventional square steel sheet pile disclosed by the publication. In the figure, 82 is a square steel sheet pile, 83 is a semi-cylindrical female joint, 84 is a male joint consisting of a ridge, 5 is a soil cement column, and 6 is earth and sand. A semi-cylindrical female joint 83 is formed on one side edge of the flange of the rectangular steel sheet pile 82, and a male joint 84 formed of a ridge is formed on the other side edge of the flange so as to protrude inward from the outer surface of the flange. Since it is provided, the square steel sheet pile is erected, and the half wall joint of one square steel sheet pile and the protruding male joint of the other square steel sheet pile are held to form the underground wall. . Since the semi-cylindrical female joint and the ridge male joint of the flange side edge portion of this example are formed by rolling, their joint shape and size are limited as in the prior arts 3 and 4. Furthermore, since the joint does not project outward from the outer surface of the flange, the core material side surface of the underground wall of this example is flat (hereinafter referred to as "prior art 6").

[0012]

In the prior art 1, since a plurality of H-section steels are erected at intervals with no mutual joints provided, a flange portion of the H-section steel as a core material is provided. The bending moment and axial force are mainly applied as external forces, and the shearing force and axial force are mainly applied as external forces to the web part. Although there is an advantage that it is possible to do a), a) There is a problem that water cannot be stopped because the H-section steels are kept apart from each other and a gap is left between them (hereinafter,
"Problem 1"). b) Furthermore, when excavating and removing the earth and sand on one side separated by the underground wall, the soil cement columns between the H-section steels collapse, so it cannot be used for earth retaining walls, bearing walls, etc. There was a problem that it was limited (hereinafter referred to as "Problem 2").

In the prior art 2, since a plurality of steel pipes are joined to each other via joints and erected, the core material of the underground wall is designed by an external force acting on the underground wall in the optimum cross-section design. Since the magnitude and direction of a certain bending moment, shearing force, and axial force are different between the standing direction of the underground wall and the direction perpendicular thereto, the material strength characteristics of anisotropic cross section are required. c) Therefore, if a steel pipe having an isotropic cross section and a smaller section modulus than that of the H-section steel is used, a steel tube having a larger outer diameter than that of the H-section steel web height when the H-section steel is used is required. In addition, since the quality becomes excessive in one direction, it is unavoidable that the core material is uneconomically selected and the price of the core material increases (hereinafter referred to as "Problem 3"). d) Further, as compared with the case where H-shaped steel is used for the core material,
The diameter of the soil cement column becomes large, the drill hole becomes large due to the auger, the workability of the drill deteriorates, the amount of soil cement injected during drilling increases and the amount of sediment discharged during drilling increases, resulting in the production of underground walls. There was a problem that the price declined and the price increased (hereinafter referred to as "Problem 4"). e) Furthermore, in densely populated areas such as urban areas, changes in the design of the underground wall itself due to conflicts with others, and a review of the construction machinery and construction method due to restrictions on the construction space, resulting in lower productivity of the underground wall and There was a problem of rising prices (hereinafter referred to as "Problem 5").

F) Furthermore, when excavating and removing earth and sand on one side divided by the underground wall or surrounded by the underground wall and used as an earth retaining wall or a bearing wall, a core material is used. One side of a steel pipe is exposed, resulting in a wavy wall surface. Therefore, when reinforcing this underground wall, a beam (which is referred to as an abdomen waving) installed orthogonal to the steel pipe is designed to increase the apparent contact area of the steel pipe with the waving and the corrugation formed by the steel pipe. Since it is necessary to fill the concrete gaps in the gaps, the work process for reinforcing the underground wall increases and the work period is extended. There was a problem that productivity of walls and the like decreased and prices increased (hereinafter referred to as "Problem 6").

In the prior art 3, since a fitting joint made of a half-cut of a straight steel sheet pile is joined to a parallel flange portion of a square steel pipe or the like having the same plate thickness over the entire circumference, g) a square as a core material Considering that the bending moment and axial force are mainly applied to the flange part of the steel pipe etc., and the shearing force and axial force are mainly applied to the web part, the optimal cross-section design is the flange and web thickness. However, since the flanges of the rectangular steel pipe and the web have the same plate thickness, there is excess thickness in either one, which makes it uneconomically necessary to select the core material, which increases the price of the core material. There was a problem similar to 3. h) Further, since the joint is bulged and formed by rolling, its shape, size, and mounting position cannot be freely selected, and a joint having a complicated shape such as a labyrinth shape cannot be obtained. The above-mentioned problem 1 of deterioration and water leakage
There was a problem similar to.

I) The joint portion is formed by bulging at the side edge of the straight steel sheet pile by rolling and protrudes outward from the outer surface of the flange including the straight steel sheet pile. Since the core material side surface of the underground wall used is not flat because it has protrusions at a certain interval, it excavates and removes the earth and sand on one side divided by the underground wall or surrounded by the underground wall and excavated. When used as a load-bearing wall or the like, one side of the square steel sheet pile, which is the core material, is exposed, so that the wall surface has projections at certain intervals. Therefore, when reinforcing this underground wall, the space between the bellows and the square steel sheet pile is increased in order to increase the apparent area of the beam (bellying sheet) installed orthogonal to the square steel sheet pile in contact with the square steel sheet pile. Since it is necessary to fill the gaps that can be filled with stuffed concrete or steel slabs, it will increase the work process of underground wall reinforcement and extend the work period. ,
There was a problem similar to the above-mentioned problem 6 such as a decrease in productivity of the bearing wall and an increase in price.

In the prior art 4, since the web is welded and joined to the flange member made of the straight steel sheet pile, j) when both are welded and joined, sufficient strength and reliability as a welded joint are obtained. Since it is required, careful welding is performed, the welding cost rises, and the price of the core material rises (hereinafter referred to as "problem 7"). k) Similar to the prior art 2, the joint portion projects outward from the outer surface of the flange, and there are projections at certain intervals on the side surface of the core material of the underground wall. Since it is necessary to fill the space formed between the square steel sheet piles with filling concrete or steel slabs, this will increase the work process of the underground wall reinforcement and extend the working period, and also require filling concrete as an additional material. Therefore, there is a problem similar to the problem 6 described above that the productivity of the earth retaining wall, the bearing wall, etc. is decreased and the price is increased.

In the prior art 5, since there is an underground wall using a square steel sheet pile formed with a special rolled H-shaped steel sheet pile, l) special rolling is required to bulge and form male joints on both side edges of the flange. Therefore, there was a problem that the price of the core material increased (hereinafter referred to as "Problem 8"). m) Further, because of the special rolling, the shape and size of the joint and the mounting position cannot be freely selected, and a joint having a complicated shape such as a labyrinth shape cannot be obtained. There was a problem similar to the above problem 1. n) Further, the twin-engagement type female joint having an H-shaped cross section is provided with a close fitting of a male joint on the side where one groove is welded and a male joint on the side where the other groove is connected. Since it is configured to be inserted, there is no room in the gap between the joints, and when the core material is built in soil cement, the fitting is not smooth and the workability deteriorates, and the underground wall There was a problem of decreased productivity and increased prices (hereinafter referred to as "Problem 9").

O) Further, a part of the female joint projects further outward than the outer surface of the flange, and there are projections at certain intervals on the side surface of the core material of the underground wall. Since it is necessary to fill the crevices formed between the steel sheet pile and the square steel sheet pile with stuffed concrete or steel slabs, this leads to an increase in the work process of underground wall reinforcement and an extension of the work period. It was necessary, and there were the same problems as the above-mentioned problem 6 that the productivity of the earth retaining wall, the bearing wall and the like decreased and the price increased.

Since the prior art 6 is an underground wall using a square steel sheet pile in which both the female joint and the male joint are protruded inward from the outer surface of the flange, these fitted joints are outside the outer surface of the flange. Since the core material side surface of this underground wall is flat because it does not project to the side, when reinforcing this underground wall, there is no gap between the bellows and the square steel sheet pile, and the direct bellows is directly Since it can be attached to the sheet pile, it has the advantage of not requiring special construction such as filling concrete, but p) because it requires special rolling to bulge two types of male and female joints on the same side of the flange. However, there was a problem similar to the above problem 8 that the price of the core material increased. q) Further, because of the above special rolling, the shape and size of the joint and the mounting position cannot be freely selected, and a joint having a complicated shape such as a labyrinth shape cannot be obtained, resulting in deterioration of water blocking performance and water leakage. There was a problem similar to problem 1 above.

The present invention has been made in order to solve such a problem. Even if H-section steel is used for the core material of the underground wall, water does not leak and the optimum cross-section design of the core material is achieved. It is possible to reduce the weight of the core material, the joints can be freely selected, the productivity of the core material and the workability such as installation are good, and the earth and sand on one side of the underground wall can be excavated and removed. The purpose of the present invention is also to obtain an underground wall where the waterproofness is maintained and the reinforcement is easy, thereby improving the economic efficiency, productivity and workability.

[0022]

The underground wall according to claim 1 of the present invention is in close proximity to a core material made of a plurality of H-shaped steels which are erected so that flange side edge portions are adjacent to each other. A plurality of pairs of joints in which a female joint joined to one H-section steel flange and a male joint joined to the other H-section steel flange are mutually held, and the core is surrounded to surround the core. It is composed of a plurality of soil cement columns that are erected so as to overlap each other in the same direction as the standing direction of the material.

According to a second aspect of the present invention, the underground wall is close to a core material made of a plurality of H-shaped steels that are erected close to each other in the same direction as the standing direction of the core material. And a plurality of pairs of joints in which a female joint joined to one H-section steel flange and a male joint joined to the other H-section steel flange are held together, It is composed of a plurality of soil cement columns that are erected so as to overlap each other in the same direction as the erection direction of the core material. In particular, this joint is a female joint joined to the inner surface (web side) or the edge surface of the flange of one of the H-section steels that are close to each other, and the female joint that is joined to the inner surface (web side) of the flange outer surface to the other close end. H
Male joints, which are joined to the inner surface (web side) of the shaped steel flange or the edge surface of the flange so as to be located on the inner side (web side) of the flange outer surface, form a pair and are held together.

According to a third aspect of the present invention, there is provided an underground wall, which comprises a core member made of a plurality of H-shaped steel joints erected close to each other in the same direction as the erection direction of the core member, and And a plurality of pairs of joints in which a female joint joined to a flange of one H-shaped steel joined body and a male joint joined to a flange of the other H-shaped steel joined to each other are held together, It comprises a plurality of soil cement columns that surround the material and are erected upright in the same direction as the erected direction of the core material so as to overlap each other. In particular, this H-shaped steel joined body is formed by abutting the flange side edge portions of a plurality of H-shaped steels together and joining them to each other, and has a box shape in which flanges are projected on both upper and lower surfaces.

According to a fourth aspect of the present invention, there is provided an underground wall comprising a plurality of H-shaped steel joined bodies erected close to each other in the same direction as the standing direction of the core, And a plurality of pairs of joints in which a female joint joined to a flange of one H-shaped steel joined body and a male joint joined to a flange of the other H-shaped steel joined to each other are held together, It comprises a plurality of soil cement columns that surround the material and are erected upright in the same direction as the erected direction of the core material so as to overlap each other. In particular, this H-shaped steel joined body is formed by abutting the flange side edge portions of a plurality of H-shaped steels together and joining them to each other, and has a box shape in which flanges are projected on both upper and lower surfaces. Further, this joint is a female joint joined to the inner surface (web side) of the flange or the edge surface of the flange of one of the adjacent H-shaped steel joints, the female joint being located inside the outer surface of the flange (web side). Male joints located on the inner side (web side) of the flange or the edge surface of the flange of the other adjacent H-shaped steel joint located inside the outer side of the flange (web side) form a pair, and form a pair with each other. I am hugged.

A subsurface wall according to a fifth aspect of the present invention is a core made of a plurality of H-section steels or H-section steel joined bodies that are erected close to each other in the same direction as the erection direction of the core material. Material and a female joint joined to the flange of one H-section steel or H-section steel joint body adjacent to each other and a male joint joined to the flange of the other H-section steel or H-section steel joint body adjacent to each other A plurality of pairs of joints each of which is embraced by each other, and a plurality of soil cement columns that surround the core material and are erected so as to overlap each other in the same direction as the erection direction of the core material. Has been done. In particular, the soil and soil cement on one side partitioned by the underground wall is excavated and removed, and one flange surface of the core material is exposed.

[0027]

The ground wall according to claim 1 of the present invention is connected by a plurality of pairs of joints in which a plurality of H-shaped steels are held by each other. Because it is held, it does not leak water. B) Even if the earth and sand on one side partitioned by the underground wall is excavated and removed, the soil cement pillar or the earth and sand will not be exposed. C) Even if the cross section of the core material of the underground wall is optimally designed, there is a high degree of freedom in selecting the dimensions of the flange and the web, so the core material has a dimension that does not waste material dynamics. . D) Further, in any case, the diameter of the soil cement column is smaller than that in the case where a steel pipe, a square steel pipe column, a straight steel sheet pile or a square steel sheet pile is used as the core material.

In the underground wall according to claim 2 of the present invention, since a plurality of ordinary rolled H-section steels are connected by a joint which is located inside (on the web side) of the flange outer surface and joined, In addition to the actions a) to d) of claim 1 of the present invention, there is the following action. E) Since there is nothing protruding from the outer surface of the flange of the H-section steel, even if the earth and sand on one side partitioned by the underground wall are excavated and removed, the exposed side surface of the core material is flat.

In the underground wall according to claim 3 of the present invention, the H-section steel joined body in which a plurality of H-section steels are joined to each other is connected by a joint. Action a) ~
In addition to d), it has the following effects. F) Compared with the case of using H-shaped steel alone as the core material,
The number of joints required is reduced by a factor of several. G) Furthermore, the number of times of core material erection work is reduced to a few times at the construction site of civil engineering and construction.

In the underground wall according to a fourth aspect of the present invention, an H-shaped steel joined body in which a plurality of H-shaped steels are joined to each other is joined inside the flange outer surface (on the web side). Since they are connected by a joint, the actions a) to d) of claim 1 of the present invention, the action e) of claim 2 and the claim 3 of the present invention.
There are the above-mentioned actions f) to g).

In the underground wall according to the fifth aspect of the present invention, since the earth and sand on one side partitioned by the underground wall is excavated and removed to expose the outer surface of one flange of the core material, Become a wall or bearing wall.

[0032]

【Example】

Example 1. FIG. 1 is a plan view showing the structure of an underground wall according to an embodiment of the present invention. In the figure, 11 is a core material, 2 is H
Shaped steel, 13 is a female joint, 14 is a male joint, and 5 is a soil cement column. In this embodiment, a substantially C-shaped female joint 13 in which a part of the cross section of the steel pipe is cut off is provided on the same side of the upper and lower flanges of the H-section steel 2, and a substantially T-shaped male joint 14 is provided on the other side. The core material 11 is joined together. This core material 11 is
Before the soil cement pillar 5 was solidified, the joints 13 and 14 were built while being held by each other and stood up one after another.

Example 2. FIG. 2 is a plan view showing the structure of the underground wall according to another embodiment of the present invention. In the figure, 21
Is a core material, 2 is an H-shaped steel, 23 is a female joint, 24 is a male joint, 5
Is a soil cement pillar. The core material 21 is an H-shaped steel 2,
It is composed of a female joint 23 and a male joint 24 joined thereto. In this embodiment, the female joint 23 is the H-shaped steel 2
Each of the upper and lower flanges is provided on each of the side surfaces on the web side near one side edge portion thereof, and has a substantially C-shape with a corner in which a part of a rectangular cross section is cut off. On the other hand, the male joints 24 are provided on the other side edge portions of the upper and lower flanges, respectively, located inside (on the web side) of the outer surface of the flanges, and are substantially L-shaped. The core member 21 composed of the H-shaped steel 2, the female joint 23, and the male joint 24, while allowing the joints 23 and 24 to hold each other before the soil cement column 5 solidifies,
Built in and built up sequentially.

Example 3. FIG. 3 is a plan view showing the structure of the underground wall according to another embodiment of the present invention. In the figure, 31
Is a core material, 2 is an H-shaped steel, 33 is a female joint, 34 is a male joint, 5
Is a soil cement column, and 32 is an H-shaped steel joined body. In this embodiment, the H-shaped steel joined body 32 is formed by abutting the flange side edge portions of two H-shaped steels 2 to each other.
Then, a substantially C-shaped female joint 33 in which a part of the cross section of the steel pipe is cut is joined to the same side of the upper and lower flanges of the H-shaped steel joined body 32, and a substantially T-shaped male joint 34 is joined to the other side. The core material 31 is configured. The core material 31 was built up and sequentially erected while holding the joints 33 and 34 with each other before the soil cement column 5 was solidified.

Example 4. FIG. 4 is a plan view showing the structure of the underground wall according to another embodiment of the present invention. In the figure, 41
Is a core material, 2 is an H-shaped steel, 43 is a female joint, 44 is a male joint, 5
Is a soil cement column, and 42 is an H-shaped steel joined body. In this embodiment, the H-shaped steel joined body 42 is formed by abutting the flange side edge portions of two H-shaped steels 2 to each other.
The female joints 43 are respectively provided on the inner side surfaces on the web side near one side edge portion of the upper and lower flanges of the H-shaped steel joined body 42, and each of the rectangular cross-sections has a substantially angled C shape. It has a character shape. On the other hand, the male joints 44 are provided at the other side edge portions of the upper and lower flanges respectively located inside (on the web side) of the outer surface of the flange, and each have a substantially L-shaped holding portion.
It has a character shape. This core material 41 is a soil cement pillar 5
Before they solidified, the joints 43 and 44 were built up and stood upright one after another while hugging each other.

Example 5. In addition, although the said Examples 1-4 demonstrated the combination of a substantially C-shaped female joint and a substantially T-shaped or substantially L-shaped male joint as a joint, in the present invention, it is not limited thereto. Others having the same function, for example, a combination of a substantially C-shaped female joint having a corner with a rectangular cross section cut off and a male joint with a rectangular cross section, a substantially C having a corner cut off a rectangular cross section You may use the combination which makes both a character type a female joint and a male joint, and the combination of a substantially S-shaped female joint and a substantially U-shaped male joint.

Further, in the above-mentioned Examples 1 to 4, the core material in which the female joint and the male joint are respectively joined to both sides of the upper and lower flanges has been exemplified, but the present invention is not limited to this, and other similar It is also possible to use a material having such a function, for example, a core material in which a female joint and a male joint are respectively joined to only one side of the upper and lower flanges.

Further, in the above-mentioned Examples 1 to 4, the core material in which the female joint and the male joint are respectively joined to both sides of the upper and lower flanges has been exemplified, but the present invention is not limited to this, and other similar Having a different function, for example, a core material 5 in which female joints are joined to both sides of the upper and lower flanges, respectively.
1 and a core material 61 in which male joints are respectively bonded to both sides of the upper and lower flanges, the core materials 51 and 61 are alternately erected while sequentially embracing the male and female joints, and standing up sequentially. May be.

Further, in the above-mentioned Examples 1 to 4, the core material in which the female joint and the male joint are respectively joined to both sides of the upper and lower flanges is exemplified, but the present invention is not limited to this, and other similar Using a core material 71 having female joints joined to both side edges of one flange and a core material 81 having male joints joined to both side edges of one flange. The core members 71 and 81 may be alternately erected and stood up sequentially while holding the joints of the above-mentioned joints with each other.

Embodiment 6 FIG. Further, in Examples 1 to 4 and 5 described above, the H-section steel 2 has the same upper and lower flange widths, but the present invention is not limited thereto, and has other similar functions. For example, H-section steels having different upper and lower flange widths may be used. Therefore, the underground wall easily becomes an arc shape.

Example 7. Further, in the above-mentioned Embodiment 2, the H-shaped steel combined body 21 in which two H-shaped steels having the same upper and lower flange widths are joined is used as the core material, but the present invention is not limited thereto. But having other similar functions, such as three or more flanges with the same upper and lower flange widths.
A core material in which shaped steels are joined to each other may be used.
You may use the core material which the H-section steels from which the upper and lower flange widths differ from each other are mutually joined.

[0042]

Since the present invention is constructed as described above, it has the following effects.

According to the underground wall of the first aspect of the present invention, 1) Since the shape and size of the joint and the mounting position can be freely selected, an underground wall with good waterproofness can be obtained.
Will be solved, and the use range of the underground wall will be further expanded. 2) Since the joints are joined to the H-section steel and held together, the remaining soil cement columns do not collapse even if excavation and removal of earth and sand and soil cement on one side separated by the underground wall It can be used for retaining walls and bearing walls, and problem 2 is solved. 3) Since the H-shaped steel constitutes the core material, the optimum design of the core material is possible. Therefore, the problem 3 is solved, the price of the core material is lowered, and the underground wall is inexpensive. 4) Since the H-section steel constitutes the core material, the diameter of the soil cement column is small and the drilling hole by the auger is small,
The productivity of the underground wall is improved, problem 4 is solved, and the underground wall becomes cheaper.

5) Since the H-shaped steel constitutes the core material, the diameter of the soil cement column is small and the construction space is narrow.
Construction becomes easier, problem 5 is solved, the construction period of the underground wall is shortened, and the cost is reduced. 6) Since the H-shaped steel constitutes the core material, the welding of the web is not required, so that the welding cost is suppressed, the problem 7 is solved, the price of the core material is lowered, and the underground wall is inexpensive. 7) Since the shape and size of the joint or the manufacturing method can be freely selected, it is possible to select an inexpensive joint, so that the problem 8 is solved, the cost of the core material falls, and the underground wall becomes cheaper. . 8) Since the shape and size of the joint or the manufacturing method can be freely selected, it is possible to select a joint with good workability, which improves productivity of the underground wall, solves problem 9, and The wall construction period will be shortened and the cost will be further reduced.

According to the underground wall of claim 2 of the present invention,
In addition to solving the problems 1 to 5 and 7 to 9 which are the effects of the above claim 1, since the side surface of the core material is flat, 9) when reinforcing, there is no gap between the abdomen and the side surface of the core material. Since the stuffed concrete becomes unnecessary, the problem 6 is solved, the construction period of the earth retaining wall and the bearing wall is shortened, and the cost is further reduced. 10) Furthermore, when excavated and removed soil and sand cement on one side of the partition, the exposed wall has a good appearance, and aesthetic treatment such as spraying onto the wall is easy.
Therefore, the use range of the underground wall can be expanded.

According to the underground wall of claim 3 of the present invention,
In addition to solving the problems 1 to 5 and 7 to 9 which are the effects of the above claim 1, since the H-shaped steel joined body constitutes the core material, 11) the number of required joints is reduced to a fraction. Therefore, the cost of the joint and the cost of joining the joint to the H-section steel are reduced, and the price of the underground wall can be reduced. 12) Furthermore, at the construction site of civil engineering and construction, the number of times the core material is erected is reduced to a fraction, so that the construction work is speeded up, the productivity of the underground wall is improved, and the underground wall is improved. The construction period will be shortened and the cost will be further reduced.

According to the underground wall of claim 4 of the present invention, 13) since the H-shaped steel joined body having flat side faces constitutes the core material, the problems 1 to 9 are solved and the above-mentioned claim There are three effects 11) to 12).

According to the underground wall of the fifth aspect of the present invention, 14) the earth and sand on one side of the partition and the soil cement are excavated and removed, so that the earth retaining wall or the bearing wall having a good waterproofness can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view showing a configuration of an underground wall according to an embodiment of the present invention.

FIG. 2 is a plan view showing a configuration of an underground wall according to another embodiment of the present invention.

FIG. 3 is a plan view showing a configuration of an underground wall according to another embodiment of the present invention.

FIG. 4 is a plan view showing a configuration of an underground wall according to another embodiment of the present invention.

FIG. 5 is a plan view showing a configuration of an underground wall made of H-shaped steel by a conventional method.

FIG. 6 is a plan view showing a configuration of an underground wall made of a steel pipe sheet pile according to a conventional method.

FIG. 7 is an explanatory diagram showing the uprising of a retaining wall made of steel pipe sheet pile by a conventional method.

FIG. 8 is a plan view showing a configuration of an underground wall made of square steel sheet pile by a conventional method.

[Explanation of symbols]

 2 H-section steel 5 Soil cement 6 Sediment 14 Female joint 15 Male joint 24 Female joint 25 Male joint 62 Steel pipe 71 Cut beam 72 Raised

Claims (5)

[Claims] 1. A core material made of a plurality of H-section steels having their flange-side edge portions standing upright in proximity to each other, a female joint joined to a flange of one H-section steel adjacent to each other, and the other A plurality of pairs of joints each having a male joint joined to the flange of the H-section steel, the female joint and the male joint being embraced by each other; An underground wall composed of a plurality of soil cement pillars that are erected in the same direction as the installation direction while overlapping each other. 2. A core material made of a plurality of H-section steels standing upright in proximity to each other along the same direction as the standing direction of the core material, and a flange of one H-section steel adjacent to each other. A female joint located on the inner surface side of the flange and a male joint located on the inner surface side of the flange and joined to the other H-shaped steel flange, and the female joint and the male joint embrace each other. An underground wall composed of a plurality of pairs of joints, and a plurality of soil cement columns that surround the core material and that are vertically erected so as to overlap each other in the same direction as the erection direction of the core material. 3. A box-shaped H-shaped steel joined body having flanges on both sides of upper and lower surfaces formed by abutting and joining flange side edge portions of a plurality of H-shaped steels to each other, and the core. A core material that is erected close to each other along the same direction as the erection direction of the material, a female joint joined to the flanges of one H-section steel joined body that is close to each other, and the other H-section steel A plurality of pairs of joints having a male joint joined to a flange of a joined body, the female joint and the male joint being held by each other, and surrounding the core member, and a standing direction of the core member. An underground wall composed of a plurality of soil-cement pillars that are vertically erected in the same direction as each other. 4. A box-shaped H-shaped steel joined body having flanges on both sides of upper and lower surfaces formed by abutting and joining flange side edge portions of a plurality of H-shaped steels to each other, and the core. A core material that is erected close to each other along the same direction as the standing direction of the material, and a female member that is positioned on the inner surface side of the flange and is joined to the flange of one H-shaped steel joint body that is close to each other. A plurality of pairs of joints having a joint and a male joint that is joined to the flange of the other H-shaped steel joined body while being positioned on the inner surface side of the flange, and the female joint and the male joint are held together. An underground wall composed of a plurality of soil cement columns that surround the core material and that are vertically erected so as to overlap each other in the same direction as the erection direction of the core material. 5. The underground wall according to claim 1, wherein one flange outer surface of the core material is exposed.