JP2002250031A - Underground structural wall and construction method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To construct an underground structural wall while utilizing a continuous wall as a permanent structure without increasing the execution cost and prolonging the construction period. SOLUTION: A drilled ditch is formed in the ground, and first structural rigid members 13 are erected in the ditch. The continuous wall 11 is precedently constructed by filling concrete C1 in the drilled ditch, the structural wall 12 is posteriorly constructed to be kept in contact wit the continuous wall 11, and the continuous wall 11 and the structural wall 12 are integrated to form the underground structural wall 10. When the continuous wall 11 is precedently constructed, the protruded webs 13b of the first structural rigid members 13 are protruded toward the installation position of the structural wall 12 in the ground. When the structural wall 12 is posteriorly constructed, the protruded webs 13b of the first structural rigid members 13 are fixed in the structural wall 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground structural wall installed as a permanent structure in the ground and a method of constructing the same.

[0002]

2. Description of the Related Art An underground structural wall of this type is usually provided with a retaining wall in the ground, excavating a space surrounded by the retaining wall, and further forming a form so as to be in contact with the retaining wall. ,
It is installed by placing structural rigid materials in the formwork and filling concrete.

[0003] In this case, the earth retaining wall is used as a temporary structure, and is usually removed or buried in the ground after the construction of the underground structural wall. Here, as the retaining wall, as shown in FIG.
1 and 2 with horizontal sheet piles 2 and 2 installed between them, as shown in (b), with soil improvement pile 4 with rigid material 3 embedded inside, or (c) A reinforced concrete continuous wall 5 or the like as shown is used.

[0004]

By the way, there is a demand to use the above-mentioned earth retaining wall as it is as a permanent structure for the purpose of simplifying the construction and reducing the cost. However, what is shown in FIG.
Lack of durability and reinforcement, and the one shown in (b)
When constructing a soil improvement pile, there is a concern that the improvement material will be dispersed in the soil and cause environmental pollution, and there is also a problem in terms of durability.

On the other hand, a continuous wall 5 as shown in FIG.
Although is excellent in terms of durability and reinforceability, there is also a case where the strength is still insufficient when used alone as a main structure. In such a case, a reinforcing wall or the like should be newly installed inside the connecting wall 5, but in order to install such a reinforcing wall firmly in the connecting wall, an anchor or the like is required. However, there is a concern that the construction cost increases and the construction period is prolonged.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been made to construct an underground structural wall without increasing construction costs or prolonging a construction period while using a continuous wall as a permanent structure. It is an object of the present invention to provide a method that can be used and a structure of an underground structure suitable for employing such a construction method.

[0007]

Means for Solving the Problems To solve the above problems, the present invention employs the following means. That is,
In the method for constructing an underground structure wall according to claim 1, while forming a digging groove in the ground, a first structural rigid material is erected so as to be located in the digging groove, and concrete is filled in the digging groove. By doing so, the connecting wall is pre-constructed, the structural wall is subsequently built so as to be in contact with the connecting wall, and an integrated structure of the connecting wall and the structural wall is constructed as an underground structural wall, When the connecting wall is pre-constructed, a part of the first structural rigid member is allowed to protrude from the excavation groove toward the installation target position of the structural wall in the ground,
When the structural wall is subsequently constructed, a part of the first structural rigid material is fixed in the structural wall.

According to a second aspect of the present invention, there is provided a method of constructing an underground structure wall,
The method of constructing an underground structure wall according to claim 1, wherein, when the connecting wall is pre-constructed, the entire portion of the first structural rigid member is located inside the excavation trench, By disposing a first structural rigid member inside the excavation groove and then moving the first structural rigid member toward the installation target position side of the structural wall, the first structural rigid member is moved. It is characterized in that a part of the material is projected into the ground.

[0009] According to a third aspect of the present invention, there is provided a method for constructing an underground structure wall.
3. The method of constructing an underground structure wall according to claim 2, wherein the first structural rigid member includes a main body extending vertically and a protrusion extending laterally from the main body. The projecting portion is configured to project into the ground, and the width of the main body when viewed from the wall thickness direction of the continuous wall is compared with the width of the projecting portion. It is characterized by being large.

According to a fourth aspect of the present invention, there is provided a method of constructing an underground structure wall, comprising:
The method for constructing an underground structure wall according to claim 2 or 3, wherein when excavating the excavation groove, the inside of the excavation groove is filled with muddy water, and when the first structural rigid member is built, The inside of the excavation trench, by an elastic impermeable sheet,
A first region including the first structural rigid material and an excavation wall surface on the structural wall side facing the first structural rigid material, and a second region positioned to surround the first region. In order to partition a part of the structural material into the ground, and to pump out the water in the first area, the water pressure in the second area is raised to the first structure. The method is characterized in that the first structural rigid material is moved to the excavation wall surface on the structural wall side by acting on the rigid material.

[0011] According to a fifth aspect of the present invention, there is provided a method of constructing an underground structure.
The method for constructing an underground structure according to claim 2 or 3, wherein the first structural rigid member is erected on the digging wall surface of the digging groove, which is opposite to the structural wall, in the digging wall. Arranging a reaction plate facing the first structural rigid member, and providing a telescopic device between the reaction plate and the first structural rigid member; In order for the first structural rigid member to protrude into the ground, the first structural rigid member is moved to the excavation wall surface on the structural wall side by extending the telescopic device.

[0012] According to a sixth aspect of the present invention, there is provided a method for constructing an underground structure.
4. The method for constructing an underground structure according to claim 2, wherein when the first structural rigid material is erected, the first excavation wall and the first excavation wall in the excavation groove are opposite to the first excavation wall. 5. A pressurized balloon is installed so as to be located between the structural rigid material and a part of the structural material is projected into the ground by pressurizing and expanding the pressurized balloon. It is characterized in that the first structural rigid material is moved to the excavation wall surface on the structural wall side.

According to a seventh aspect of the present invention, there is provided a method for constructing an underground structure.
The method for constructing an underground structural wall according to any one of claims 2 to 6, wherein the first structural rigid material is vibrated when a part of the first structural rigid material is projected into the ground. Is provided.

[0014] The method for constructing an underground structure according to claim 8 comprises:
2. The method for constructing an underground structure wall according to claim 1, wherein the first structural rigid member has a main body extending vertically and a protrusion extending laterally from the main body. And the projecting portion is configured to project into the ground, and when the first structural rigid material is erected in the excavation groove, the first structural rigid material is Driving along the excavation wall surface of the excavation groove on the side of the structural wall so that only the main body portion is located in the excavation groove and the protruding portion is positioned protruding into the ground in the installation target position of the structural wall. It is characterized by being installed.

According to a ninth aspect of the present invention, there is provided a method for constructing an underground structure,
2. The method for constructing an underground structure wall according to claim 1, wherein the first structural rigid member has a main body extending vertically and a protrusion extending laterally from the main body. The projecting portion is configured to project from the connecting wall toward the installation target position of the structural wall, and when the connecting wall is pre-constructed, a foam resin is formed around the projecting portion. While covering with a material, the first structural rigid material,
When the foamed resin material is built in the excavation groove so as to be located along the excavation wall surface of the excavation groove on the structure wall side, and when the structure wall is to be subsequently constructed, the installation target position of the structure wall is After excavating the ground, by removing the foamed resin material, the projecting portion is exposed to the structural wall side.

A method of constructing an underground structure according to claim 10 is the method of constructing an underground structure wall according to any one of claims 1 to 9, wherein when the structure wall is subsequently constructed, The structure wall may have a structure in which a second structural rigid material is embedded in concrete, and the second structural rigid material may be connected to a part of the first structural rigid material.

An underground structure constructing method according to claim 11 is the method according to claim 10 for constructing an underground structural wall,
The first structural rigid material and the second structural rigid material are joined by any one of the following joining methods. Weld joint, bolt joint, comb-shaped mesh joint, closed dowel joint, truss joint,
Open dowel joint.

According to a twelfth aspect of the present invention, there is provided a method of constructing an underground structural wall according to the tenth or eleventh aspect, wherein the second structural rigid member is used when the structural wall is constructed. A finishing plate is provided in a portion located on the opposite side to the connecting wall, and concrete is poured between the finishing plate and the connecting wall.

According to a thirteenth aspect of the present invention, there is provided a method for constructing an underground structural wall according to any one of the first to twelfth aspects, wherein the step of constructing the structural wall comprises the steps of: A beam member is fixed to a part of the first structural rigid member protruding.

According to a fourteenth aspect of the present invention, the underground structural wall is installed in the ground so that the continuous wall and the structural wall are in contact with each other, and the continuous wall has a structure in which a first structural rigid material is embedded in concrete. The structural wall is configured such that a second structural rigid material is embedded in concrete, and the first structural rigid material is
A part thereof is configured to protrude from the connecting wall and be fixed to the second structural rigid member in the structural wall.

According to a fifteenth aspect of the present invention, there is provided an underground structural wall.
4. The underground structure wall according to 3, wherein a beam is fixed to a part of the first structural rigid material protruding from the continuous wall.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are diagrams schematically showing an underground structure wall 10 according to an embodiment of the present invention. FIG. 1 is a plan view of a main part of the underground structure wall 10, and FIG.
FIG.

As shown in these figures, the underground structure wall 10 is provided as a retaining wall in the ground G, and is in contact with the continuous wall 11 provided on the ground G side and the continuous wall 11. And a structural wall 12 provided as described above.

The connecting wall 11 is formed by embedding the first structural rigid material 13 in the concrete C1, and is constructed before the structural wall 12. The structural wall 12 is formed by embedding the second structural rigid member 14 in the concrete C2.

The first and second structural rigid members 13 and 14 are:
Body parts 13a and 14a formed of steel columns made of H-shaped steel or T-shaped steel, respectively,
It is configured to include projecting webs 13b and 14b projecting from 14a. The projecting web 13b of the first structural rigid member 13 is located in a protruding state from the connecting wall 11 toward the inside of the structural wall 12, and the second structural rigid member 14
Is welded to the projecting web 14b. As a result, the projecting web 13a of the first structural rigid member 13 is
2 has an integrated structure.

The main body 13a of the first structural rigid member 13
Is located in the connecting wall 11 so as to be in contact with the structural wall 12, and is separated from the wall surface 11 a of the connecting wall 11 opposite to the structural wall 12. Thereby, the first structural rigid member 13 has a configuration in which a constant covering thickness of the concrete C1 is secured to the ground G side.

The structural wall 12 has a structure in which a wall surface opposite to the continuous wall 11 is formed by finishing panels (finished plates) 15, 15,... These finishing panels 15 are formed of, for example, a precast concrete slab, are integrated with the second structural rigid member 14, and are supported by the second structural rigid member 14.

Next, a method of constructing the underground structure wall 10 will be described. For this, first, as shown in FIG. 3A, an excavation groove 17 is formed at a position where the connecting wall 11 is to be installed in the ground G. In this case, the inside of the excavation groove 17 is filled with muddy water W containing a stable liquid. Next, this excavation groove 17
A first structural rigid member 13 is built therein. In this case, the first structural rigid member 13 is arranged such that the end of the protruding web 13 b faces the installation target position 18 of the structural wall 12. So that all parts of the material 13 are located (the protruding web 13
The first structural rigid member 13 is arranged in the center of the excavation groove 17 so that b does not fit). In this case, the first structural rigid member 13 is covered with a water-impermeable sheet 19 having elasticity.

Here, the water-impermeable sheet 19 is, for example, provided between four core members 20 arranged vertically. Here, of the cores 20, 20,..., Two cores 20a, 20a located at the end of the water-impermeable sheet 19 are:
The two core members 20b, which are arranged at positions separated from each other with the first structural rigid member 13 interposed therebetween while being in contact with the excavation wall surface 17a on the installation target position 18 side of the structural wall 12, and located at the center. 20b is the main body portion 13 of the first structural rigid material 13.
Among the flanges 21 and 21 of the H-shaped steel constituting the member a, the flange 21a is disposed in contact with the edge of the flange 21a located on the opposite side to the installation target position 18 of the structural wall 12.

By arranging the impermeable sheet 19 in this way, the inside of the excavation groove 17 can be partitioned into the first and second regions S1 and S2. Here, the first region S1 is a region including the first structural rigid member 13 and a portion of the excavated wall surface 17a on the side of the structural wall 18 which is located facing the first structural rigid member 13. The second area S2 is an area located so as to surround the first area S1.

From this state (the state of FIG. 3A), when the muddy water W in the first area S1 is pumped, the impermeable sheet 19
Is located so as to be in close contact with the first structural rigid member 13 due to the mud pressure in the second region S2 as shown in FIG. 3 (b), whereby the first structural rigid member 13 Is pressed by the muddy water pressure in the second region S2, and the excavation wall surface 17a
Side so that the projecting web 13b
Fit inside. In this case, since the width of the first structural rigid member 13 viewed from the wall thickness direction (x direction) of the main body 13a is larger than the width of the protruding web 13b, only the protruding web 13b is in the ground G. And the first structural rigid member 13 stops in a state where the main body 13b is in contact with the excavated wall surface 17a. At this time, first, vibration is applied to the structural rigid material 13 by using a vibrator (not shown) or the like, so that the protruding web 13b is securely fitted into the ground G.

Thereafter, the impermeable sheet 19 is removed, and further, the concrete wall C is filled in the excavation groove 17 by replacing the muddy water W in the excavation groove 17 to form the continuous wall 11. When the concrete C1 of the continuous wall 11 has hardened, the ground G on the side of the structural wall 12 of the continuous wall 11 is excavated. Thereby, the projecting web 13b of the first structural rigid member 13 is
It is exposed in a protruding state from the wall surface of the continuous wall 11.

Next, a second structural rigid member 14 is installed so as to face the projecting web 13b exposed from the wall surface of the continuous wall 11, and the projecting webs 13b of the first and second structural rigid members 13, 14 are provided. , 14b are welded to each other. Further, the finishing panel 15 is attached to a flange of the second structural rigid member 14 located on the opposite side to the connecting wall 11. The concrete C is placed in the space surrounded by the finishing panel 15 and the connecting wall 11 using the finishing panel 15 and the connecting wall 11 as a formwork.
2 is formed to form the structural wall 12. According to the above procedure, the structure of the underground structure wall 10 as shown in FIGS. 1 and 2 is obtained.

According to the above-described method for constructing the underground structure wall 10, the pre-constructed continuous wall 11 and the succeedingly constructed structural wall 12
Is constructed as an underground structure wall 10 and, when the connecting wall 11 is pre-constructed, the projecting web 13 b of the first structural rigid member 13 is directed toward the installation target position 18 of the structural wall 12. Since the projecting web 13b of the first structural rigid member 13 is fixed in the structural wall 12 when the structural wall 12 is to be subsequently constructed, the inside of the continuous wall 11 is reinforced by the structural wall 12. Thus, it is possible to obtain a permanent structure excellent in durability while using the continuous wall 11. Then, the continuous wall 11 and the structural wall 12 can be firmly and easily integrated, and furthermore, the construction cost in this case does not increase, and the construction period can be lengthened.

Further, according to the above-described method for constructing the underground structure wall 10, the first structural rigid member 13 is arranged so that all the portions of the first structural rigid member 13 are located inside the excavation groove 17. Further, since the first structural rigid member 13 is moved toward the installation target position 18 side of the structural wall 12 so that the projecting web 13b projects into the ground G, the projecting web 13b is At the same time as projecting into G, the covering of the concrete C1 on the first structural rigid member 13 can be secured, and the workability is good.

Further, the first structural rigid member 13 is
a of the first structural rigid member 13 because the width dimension of the first
The protruding web 13b is moved inside the ground G
The main body 1 of the first structural rigid material 13
3a can be stopped at the excavation wall surface 17a of the excavation groove 17, whereby the first structural rigid member 13 can be easily arranged at a fixed position.

Further, the first structural rigid member 13 is removed from the excavation groove 17.
When it is built in the inside, the inside of the excavation groove 17 is surrounded by a water-impermeable sheet 19 having elasticity, a first region S1 including the first structural rigid member 13, and a second region surrounding the first region S1. The first structural rigid member 13 is formed by partitioning the first structural rigid member 13 from the first structural rigid member 13 by pumping up the muddy water W in the first region S1 and applying the muddy pressure in the second region S2 to the first structural rigid member 13. 13, the projecting web 13b is fitted into the ground G, so that the first structural rigid member 13 can be moved in the excavation groove 17 without requiring special equipment and the like, Simple construction is possible.

Further, the projecting web 1 of the first structural rigid material 13
When the first structural rigid member 13 is vibrated when the 3b is fitted into the ground G, the fitting of the projecting web 13b into the ground G can be ensured.

Furthermore, according to the above-described underground structural wall 10 and the method of constructing the same, the projecting webs 13b and 14b of the first structural rigid member 13 and the second structural rigid member 14 are connected to each other by welding. In addition, the structural strength of the underground structure wall 10 can be secured, and a strong structure can be realized.

When the structural wall 12 is constructed, a finishing panel 15 is provided in a portion of the second structural rigid member 14 located on the side opposite to the connecting wall 11, and the finishing panel 15 and the connecting wall 11 are connected to each other. Since the concrete C2 is cast in between, it is possible to use the finishing panel 15 as a formwork, and it is possible to realize labor saving, rationalization, and improvement in safety of on-site work.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and other configurations can be adopted without departing from the gist of the present invention. is there.

For example, in the above embodiment, the protruding webs 13b, 1 of the first and second structural rigid members 13, 14 are used.
4b are welded to each other, but not limited to this, they may be joined by bolts 23 as shown in FIG. 4, and in this case, construction can be performed more easily.

Further, as shown in FIG.
The first and second structural rigid members 13 and 14 are formed by forming the distal ends of the first and second structural rigid members 13 and 14b in such a manner that the distal ends of the first and second structural members are fitted in a comb shape when viewed from the upside.
May be employed, in which the projecting webs 13b and 14b are joined to each other. in this case,
The welding operation or the like becomes unnecessary, and the installation of the first and second structural rigid members can be facilitated.

Further, as shown in FIG. 6, the tip of the projecting web 13b of the first structural rigid member 13 is formed in a T-shape in plan view, and the projecting web 14b of the second structural rigid member 14 is formed. In the meantime, a closed type dowel 24 whose front end 24a is closed with a slight gap left is attached, and the front end of the protruding web 13b is positioned inside the closed dowel 24 so that these can be removed. You may make it employ | adopt the closed type dowel joint which joins mutually. In order to perform such joining, the second structural rigid member 14 is positioned so that the tip of the protruding web 13b is located inside the closed type dowel 24.
The first and second structural rigid members 13 and 14 can be easily joined at the same time as the second structural rigid member 14 is installed, thereby improving workability. Can be achieved.

Further, as shown in FIG. 7, the space between the first structural rigid member 13 and the second structural rigid member 14 is formed in a zigzag shape when viewed from an elevation using a large number of web members 25. The truss connection may be performed so as to be as follows. In this case, the bending moment is strengthened by the connection between the first structural rigid member 13 and the second structural rigid member 14, and these can function well as a structural material. .

As shown in FIG. 8, a dowel 26 is provided at the tip of the projecting web 13b of the first structural rigid member 13 so as to expand toward the side in the projecting direction. An opening 27 having a size smaller than the width of the end of the dowel 26 is formed in the flange 14 c of the material 14 on the side of the connecting wall 11.
An open dowel 27 having a may be provided, and these may be joined (open dowel joint) by locating the tip of the dowel 26 inside the open dowel 27. In this case, it is easy to provide a margin between the dowel 26 and the open dowel 27, so that the installation error of the first and second structural rigid members 13, 14 can be easily absorbed. .

In the above embodiment, when the projecting web 13b of the first structural rigid member 13 is fitted into the ground G, the muddy water pressure is applied to the first structural rigid member 13 using the impermeable sheet 19. Was to act, but instead of this,
As shown in FIG. 9A, when the first structural rigid member 13 is erected in the excavation groove 17, the installation target position 18 of the structural wall 12 is set.
A reaction plate 28 is installed on the excavation wall surface 17b on the opposite side to the above, and guide plates 29, 29 are provided at the end of the reaction plate 28 so as to guide the first structural rigid member 13 from both sides. The jack (expansion / contraction device) 30 is further disposed between the reaction force plate 28 and the first structural rigid member 13, and the jack 30 is extended from this state as shown in FIG. The projecting web 13b of one structural rigid member 13 may be fitted into the ground G. Thereby, the protruding web 13b can be reliably fitted into the ground G.

Further, as shown in FIG. 10A, when the first structural rigid member 13 is erected in the excavation groove 17, the excavated wall surface 17b on the opposite side of the installation target position 18 of the structural wall 12 and A pressurized balloon 31 is installed between one structural rigid member 13 and the pressurized balloon 31 as shown in FIG.
May be moved under pressure to move the first structural rigid member 13 so that the protruding web 13b is fitted into the ground G. Thereby, the protruding web 13b can be reliably fitted into the ground G.

In the above embodiment, as shown in FIGS. 11 and 12, the beam member 32 is fixed to a part of the protruding web 13b of the first structural rigid member 13 so as to extend in the horizontal direction. In this case, as shown in the figure, it is desirable to reinforce the upper and lower sides of the beam member 32 with a rib plate 33. In this way, even if the structure in contact with the underground structure wall 10 has a plurality of floors, it can be well coped with. In addition, beam material 3
2 may also be used as a temporary support such as a cut beam, and in this case, the construction of the structural wall 12 and the structure inside the structural wall 12 can be facilitated.

Further, instead of the configuration of the above embodiment, a configuration as shown in FIG. 13 may be adopted. In the underground structure wall 10 shown in FIG. 13, the width of the excavation trench 17 in the wall thickness direction (x direction) of the underground structure wall 10 is the length of the body 13 a of the first structural rigid member 13 in the x direction. And the flange 2 of the main body 13a.
1, 21 are the excavation wall surfaces 17a, 17 of the excavation groove 17, respectively.
b, and the protruding portion 13b of the first structural rigid member 13 protrudes toward the structural wall 12 side.

In order to construct such an underground structure wall 10, first, an excavation groove 17 is formed in the ground G, and the excavation groove 17 is formed.
A first structural rigid member 13 is built therein. At this time, the first structural rigid member 13 is arranged such that only the main body portion 13a is located in the excavation groove 17 and the projecting portion 13b is located so as to project into the ground G within the installation target position of the structural wall 12. Further, by applying vibration to the first structural rigid member 13 or hitting the first structural rigid member 13, the first structural rigid member 1
3 is the excavation wall surface 17a on the side of the structural wall 12 in the excavation groove 17
Pour along. Thereby, as shown in FIG. 13, the first structural rigid member 13 can be arranged in the excavation groove 17 with the protruding web 13b fitted in the ground G. Thereafter, the construction of the underground structure wall 10 is completed by forming the structure wall 12 along the excavation groove 17 in the same procedure as in the above embodiment.

Further, in the configuration of FIG. 13, the first structural rigid member 13 has a configuration in which the projecting web 13b is provided only on the side of the structural wall 12, but instead of this, as shown in FIG. , The first structural rigid member 13 is connected to the structural wall 12 of the main body 13a.
A configuration in which the protruding webs 13b are provided on both the side and the opposite side may be adopted. Also in this case, similarly to the underground structure wall 10 in FIG. 13, the first structure rigid member 13 is driven by vibration or impact along the excavation wall surface 17 a of the excavation groove 17, thereby forming the first structure rigid member 13. The rigid material 13 is connected to the projecting web 1
3b is inserted into the excavation groove 17 in a state of being fitted into the ground G. Thereby, the protruding web 13b can be easily fitted into the ground G, and the workability is excellent.

In the above-described embodiment, the first structural rigid member 13 has a configuration in which the projecting web 13b is provided on the main body 13a made of H-shaped steel. However, the present invention is not limited to this. As shown, as the first structural rigid material 13,
An H-shaped sheet pile 35 provided with a protruding web 13b is used.
The continuous wall 11 may be formed by burying the wall.

The first structural rigid member 13 is not limited to this.
A steel pipe sheet pile 38 as shown in FIG. As shown in FIG. 17, as the first structural rigid material 13, a U-shaped sheet pile provided with a protruding web 13 b may be used, and these may be connected to each other and embedded in the continuous wall 11.

Further, the first structural rigid material 13 as shown in FIGS. 16 and 17 may be directly driven into the ground and used as the continuous wall 11 as it is. In this case, as shown in FIG. 18, an H-shaped sheet pile 35 provided with a protruding web 13 b may be directly driven into the ground and used directly as the continuous wall 11.

In the above embodiment, the excavation groove 1
7 is formed in a groove shape, but the invention is not limited to this. As shown in FIG. It may be formed as. In this case, as shown in FIG. 19, the first structural rigid member 13 includes
It is preferable to use a hole having the same dimension as the diameter of the excavation hole 41, so that the protruding portion 13b can be favorably protruded into the ground G on the structure wall 12 side. Further, in this case, the first structural rigid member 13 may be built in the excavation hole 41 every time the excavation hole 41 is excavated, or the excavation hole 41 may be formed continuously to form the excavation groove 1.
After the 7 is provided, it may be built in the excavation hole 41.

Further, instead of the configuration of the above embodiment,
A configuration as shown in FIG. 20 may be adopted.
20, (a) and (b) show the underground structure wall 10
It is a figure showing other construction methods, and (c) is a schematic diagram of the 1st structural rigid material 13 used in this case.

Here, as shown in FIG. 20 (c), when the connecting wall 11 is pre-constructed, the periphery of the protruding web 13b is used as the first structural rigid material 13, for example, a foamed resin material 43 such as styrene foam. Use the one covered by Here, as a method of attaching the foamed resin material 43,
A small hole 44 is provided in the protruding web 13b and the foamed resin material 43, and a wire 45 is inserted into the small hole 44, and the wire 45 is wound around the foamed resin material 43 and the protruding web 13b to thereby protrude. Web 13
The foamed resin material 43 is fixed to b.

Then, the first structural rigid member 13 in a state as shown in FIG.
In this case, as shown in FIG.
Are located along the excavation wall surface 17 a of the excavation groove 17 on the side of the structural wall 12. And the muddy water W in the excavation groove 17
By replacing concrete with concrete C
Cast concrete C inside. In this state, by excavating the installation target position 18 of the structural wall 12 on the ground G, and further removing or scraping the foamed resin material 43, as shown in FIG. A state in which the recessed portion 46 is formed on the wall surface on the side of the wall 12 and the protruding web 13b of the first structural rigid member 13 is exposed inside the recessed portion 46 is realized.

Thereafter, as shown in FIG. 20B, the second structural rigid member 14 is erected in the installation target position 18 of the structural wall 12, and further, the projecting web of the second structural rigid member 14 is formed. 1
4b and the protruding web 13b of the first structural rigid member 13 are joined, and concrete is poured into the installation target position 18 of the structural wall 12 to form the underground structural wall 10.

As described above, by providing the foamed resin material 43 for preventing the concrete C from wrapping around the projecting web 13b of the first structural rigid material 13, the first structural rigid material 13 is Moving or projecting web 1
The projecting web 13b of the first structural rigid member 13 can be easily exposed to the structural wall 12 without performing an operation such as fitting the 3b into the ground G, and the workability can be improved. Further, here, by using the foamed resin material 43, the handling thereof is easy, and the removal operation can be facilitated.

In addition, other configurations may be adopted without departing from the spirit of the present invention. In addition, the above-described modified examples may be appropriately selectively combined and adopted. Needless to say, it is good.

[0063]

As described above, according to the method for constructing an underground structure wall according to the first aspect, an underground structure wall obtained by integrating a precedingly constructed continuous wall and a succeedingly constructed structure wall is used. When constructing the connecting wall in advance, a part of the first structural rigid material is projected toward the installation target position of the structural wall, and when constructing the structural wall, Since a part of one structural rigid material is fixed in the structural wall, the inside of the continuous wall is reinforced by the structural wall, and it is possible to obtain a permanent structure having excellent durability while using the continuous wall. In addition, the continuous wall and the structural wall can be firmly and easily integrated. In this case, the construction cost does not increase, and the construction period can be shortened.

According to the method for constructing an underground structural wall according to the second aspect, the first structural rigid member is arranged so that all portions of the first structural rigid member are located inside the excavation trench. By moving the first structural rigid material toward the installation target position side of the structural wall, a part of the first structural rigid material is projected into the ground. Can be projected into the ground, and at the same time, the concrete covering of the first structural rigid material can be secured, and the workability is good.

According to the method of constructing an underground structural wall according to claim 3, the width of the main body of the first structural rigid member is larger than the width of the protruding portion. When moving inside the excavation groove of one structural rigid material and projecting the protruding portion into the ground, the main body of the first structural rigid material can be stopped at the excavation wall surface of the excavation groove, Thereby, the first structural rigid member can be easily arranged at a fixed position.

According to the method for constructing an underground structure wall according to the fourth aspect, when the first structural rigid material is buried in the excavation groove, the interior of the excavation groove is formed by the elastic impermeable sheet. Is divided into a first region including the structural rigid material of the first region and a second region surrounding the first region, and the muddy water of the first region is pumped up, and the muddy pressure of the second region is reduced to the first region. By moving the first structural rigid material by acting on the first structural rigid material, the first structural rigid material can be moved in the excavation groove without requiring special equipment. Can be
Simple construction is possible.

According to the method of constructing an underground structure wall according to claim 5, a part of the first structural rigid material is projected to the ground by using the reaction plate and the expansion and contraction device. A part of one structural rigid material can be fitted into the ground.

According to the method for constructing an underground structure wall according to claim 6, when a part of the first structural rigid material is projected to the ground,
Since the vibration is applied to the first structural rigid member, a part of the first structural rigid member can be easily and surely fitted into the ground.

According to the construction method of the underground structure wall according to the seventh aspect, since a part of the first structural rigid material is made to protrude into the ground by using the pressurized balloon, the first structure can be surely formed. Part of the rigid material can be fitted into the ground.

According to the method for constructing an underground structure according to the eighth aspect, the first structural rigid material is provided only in the main body portion in the excavation groove, and the protruding portion is provided in the ground in the installation target position of the structural wall. The projecting portion is located along the excavation wall on the structural wall side of the excavation groove so that the projecting portion can be easily inserted into the ground, thereby improving workability. it can.

According to the method for constructing an underground structure according to the ninth aspect, the projecting portion is provided with a foamed resin material for preventing the concrete from wrapping around the projecting portion of the first structural rigid member, so that the projecting portion is formed on the structural wall. It can be easily projected to the side, and the workability can be improved. Here, by using the foamed resin material, the handling is facilitated and the removal operation can be facilitated.

According to the method for constructing an underground structural wall according to claim 10, the first structural rigid member is connected to the second structural rigid member constituting the structural wall. Structural strength can be ensured, and a strong structure can be realized. In this case, by joining the first and second structural rigid members as in the eleventh aspect, it is possible to select an optimal joining means in accordance with functional or construction requirements.

According to the method for constructing an underground structural wall according to the twelfth aspect, when constructing the structural wall, a finishing plate is provided on a portion of the second structural rigid material opposite to the continuous wall. Since concrete is cast between the finishing plate and the connecting wall, it is possible to use the finishing panel as a waste formwork, thereby saving labor, streamlining, and improving safety of on-site work. be able to.

According to the method of constructing an underground structural wall according to claim 13, the beam material is fixed to a part of the first structural rigid member, so that the structure in contact with the underground structural wall has a plurality of floors. Even if there is, it can respond satisfactorily. Also,
Beam materials can also be used as temporary structures such as cut beams,
In this case, the construction can be facilitated.

In the underground structure wall according to claim 14,
Since the connecting wall and the structural wall are integrated in a state where the first and second structural rigid members embedded in each are connected,
Usually, a strong structure can be realized while effectively using the continuous wall used as the temporary structure. Further, in this case, if the beam is protruded from the first structural rigid material as in claim 15, this beam can be used as a cut beam, and when the structural wall is to be subsequently constructed, The construction can be facilitated, and even if the structure in contact with the underground structure wall has a plurality of floors, the structure can be satisfactorily dealt with.

[Brief description of the drawings]

FIG. 1 is a plan cross-sectional view of a main part of an underground structure wall schematically showing an embodiment of the present invention.

FIG. 2 is an elevational sectional view of the same.

FIG. 3 is a process diagram showing a first procedure for moving a first structural rigid member in an excavation groove when constructing a continuous wall among the underground structural walls shown in FIGS.

FIG. 4 is a view schematically showing another embodiment of the present invention, and is an enlarged plan sectional view of a connecting portion of first and second structural rigid members.

5 (a) is an enlarged plan sectional view and FIG. 5 (b) is an enlarged elevation view of a connecting portion of the first and second structural rigid members.

FIG. 6 is an enlarged plan sectional view of a connecting portion of the first and second structural rigid members.

FIG. 7A is an enlarged plan sectional view of the connecting portion of the first and second structural rigid members, and FIG.

FIG. 8 is an enlarged plan sectional view of a connecting portion of the first and second structural rigid members.

FIG. 9 is a process diagram showing a second procedure for moving the first structural rigid member in the excavation trench when constructing a continuous wall among the underground structural walls shown in FIGS. is there

FIG. 10 is a process chart showing a third procedure.

FIG. 11 is a plan sectional view of a main part of the underground structure wall.

FIG. 12 is a vertical sectional view of a main part of the same.

FIG. 13 is a diagram schematically showing another embodiment of the present invention, and is a plan sectional view of a main part of a continuous wall of an underground structure wall.

FIG. 14 is a view schematically showing still another embodiment of the present invention, and is a plan sectional view of a main part of a continuous wall of an underground structure wall.

FIG. 15 is a view schematically showing still another embodiment of the present invention, and is a plan sectional view of a main part of a continuous wall of an underground structure wall.

FIG. 16 is a plan sectional view showing another example of the first structural rigid member used for the underground structural wall of the present invention.

FIG. 17 is a cross-sectional plan view showing still another example of the first structural rigid material used for the underground structural wall of the present invention.

FIG. 18 is a plan sectional view showing still another example of the first structural rigid member used for the underground structural wall of the present invention.

FIG. 19 is a view schematically showing still another embodiment of the present invention, and is a plan sectional view of a main part of a continuous wall of an underground structure wall.

FIG. 20 is a view schematically showing still another embodiment of the present invention, wherein (a) and (b) are process diagrams for constructing an underground structural wall, and (c) is a case in this case. FIG. 2 is a plan sectional view of a first structural rigid material used for the first embodiment.

FIG. 21 is a perspective view of an earth retaining wall schematically showing a conventional technique of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Underground structural wall 11 Connecting wall 12 Structural wall 13 First structural rigid material 13a Main body 13b Projecting web 14 Second structural rigid material 14a Main body 14b Projecting web 15 Finishing panel (finished plate) 17 Drilling groove 19 Impermeable sheet Reference Signs List 23 Bolt 24 Closed Dowel 27 Open Dowel 28 Reaction Plate 30 Jack (Expansion Device) 31 Pressurized Balloon 32 Beam Material 43 Foam Resin Material S1 First Area S2 Second Area W Muddy Water

Claims (15)

[Claims] 1. An excavation trench is formed in the ground while a first structural rigid material is erected so as to be located in the excavation trench, and concrete is filled in the excavation trench to form a continuous wall in advance. And constructing a structural wall to be in contact with the connecting wall,
It is configured to construct an integrated structure of the connecting wall and the structural wall as an underground structural wall.When the connecting wall is pre-constructed, a part of the first structural rigid material is removed from the excavation groove. Protruding toward the installation target position of the structural wall in the ground, and when constructing the structural wall later, fixing a part of the first structural rigid material in the structural wall. Characteristic construction method of underground structural wall. 2. The method for constructing an underground structure wall according to claim 1, wherein when the connecting wall is pre-constructed, all parts of the first structural rigid member are located inside the excavation trench. In such a manner, the first structural rigid member is disposed inside the excavation groove, and thereafter, by moving the first structural rigid member toward the installation target position side of the structural wall, A method for constructing an underground structural wall, comprising: projecting a part of a first structural rigid material into the ground. 3. The method of constructing an underground structural wall according to claim 2, wherein the first structural rigid member is a main body extending vertically and a protrusion extending laterally from the main body. The projecting portion is configured to project into the ground, and the width of the main body when viewed from the wall thickness direction of the continuous wall is defined as the width of the projecting portion. A method for constructing an underground structural wall, characterized in that it is made larger than its dimensions. 4. The method for constructing an underground structure wall according to claim 2, wherein when excavating the excavation trench, the interior of the excavation trench is filled with muddy water, and the first structural rigid material is removed. When erected, the inside of the excavation groove includes the first structural rigid material and the excavation wall surface on the structural wall side facing the first structural rigid material by an elastic impermeable sheet. A first area and a second area positioned so as to surround the first area, and to allow a part of the structural material to protrude into the ground, By pumping up muddy water, the water pressure in the second region is applied to the first structural rigid member to move the first structural rigid member to the excavation wall on the structural wall side. How to build a wall. 5. The method for constructing an underground structure according to claim 2, wherein the first structural rigid member is erected on the side of the excavation groove in the excavation groove opposite to the structural wall. A reaction force plate positioned facing the first structural rigid material, and a telescopic device is provided between the reaction force plate and the first structural rigid material; A method for constructing an underground structural wall, comprising: extending the telescopic device to move the first structural rigid material to an excavation wall on the side of the structural wall in order to project a portion into the ground. 6. The method for constructing an underground structure according to claim 2, wherein when the first structural rigid material is erected, the excavation on the opposite side of the excavation groove from the structural wall. A pressure balloon is installed so as to be located between a wall surface and the first structural rigid material, and the pressure balloon is pressurized and expanded to protrude a part of the structural material into the ground. The method according to claim 1, wherein the first structural rigid material is moved to an excavation wall on the side of the structural wall. 7. The method for constructing an underground structure wall according to claim 2, wherein the first structural rigid material is partially projected into the ground, and the first structural rigid material is protruded into the ground. A method for constructing an underground structural wall, characterized by applying vibration to a structural rigid material. 8. The method for constructing an underground structural wall according to claim 1, wherein the first structural rigid material is a main body extending vertically and a protrusion extending laterally from the main body. And having a portion, and is configured to protrude the protruding portion into the ground.When the first structural rigid material is built in the excavation groove,
The first structural rigid material, such that only the main body portion is located in the excavation groove, the projecting portion is protruded into the ground in the installation target position of the structural wall, the excavation groove of the excavation groove A method for constructing an underground structural wall, which is driven along an excavation wall on the structural wall side. 9. The method for constructing an underground structural wall according to claim 1, wherein the first structural rigid member includes a main body extending vertically and a protrusion extending laterally from the main body. And a projecting portion that projects from the connecting wall toward the installation target position of the structural wall. When the connecting wall is pre-constructed, the projecting portion is used. Is covered with a foamed resin material, and the first structural rigid material is built in the digging groove so that the foamed resin material is located along the digging wall surface of the digging groove on the structure wall side. When constructing the structural wall in the following, after excavating the ground at the installation target position of the structural wall, by removing the foamed resin material, exposing the protrusion to the structural wall side. Characteristic construction method of underground structural wall. 10. The method for constructing an underground structure wall according to claim 1, wherein when the structure wall is subsequently constructed, a second structural rigid material is attached to the structure wall. A method for constructing an underground structural wall, comprising a structure buried in concrete and connecting the second structural rigid material to a part of the first structural rigid material. 11. The method for constructing an underground structural wall according to claim 10, wherein the first structural rigid member and the second structural rigid member are joined by any one of the following joining methods. A method for constructing an underground structural wall, characterized by being performed.
Weld joint, bolt joint, comb-shaped mesh joint, closed dowel joint, truss joint, open dowel joint. 12. The method for constructing an underground structure wall according to claim 10 or 11, wherein when the structure wall is constructed,
An underground structure, wherein a finishing plate is provided in a portion of the second structural rigid material opposite to the connecting wall, and concrete is cast between the finishing plate and the connecting wall. How to build a wall. 13. The method for constructing an underground structure wall according to claim 1, wherein in constructing the structure wall, one of the first structural rigid members protruding from the connecting wall is provided. A method for constructing an underground structural wall, comprising fixing a beam member to a part. 14. A connecting wall and a structural wall are installed in the ground so as to be in contact with each other, wherein the connecting wall has a structure in which a first structural rigid material is buried in concrete, A second structural rigid material is embedded in concrete, and a part of the first structural rigid material protrudes from the connecting wall and is fixed to the second structural rigid material in the structural wall. An underground structural wall characterized in that the underground structural wall is formed. 15. The underground structural wall according to claim 14, wherein a beam member is fixed to a part of the first structural rigid member protruding from the connecting wall. Structural wall.