KR100967496B1 - Device for constructing an underground structure - Google Patents

Abstract

PURPOSE: An underground structure construction apparatus is provided to reduce the time and cost for construction by employing removable center piles instead of steel piles and top-base foundation. CONSTITUTION: An underground structure construction apparatus comprises an earth retaining wall(10), center piles(20), a horizontal structure of first floor(30), pillars between floors(40), and a horizontal structure of each floor(50). The earth retaining wall is formed by pressing the perimeter of an excavation. The center piles are removable placed in the excavation. The horizontal structure of first floor is installed on the top of the center piles and spans the earth retaining wall to support the earth pressure of the earth retaining wall. The pillars between floors are fixed to the horizontal structure of first floor and extended downward. The horizontal structure of first floor is supported in the end of the pillars between floors. The horizontal structure of each floor supports the earth retaining wall together with the horizontal structure of first floor.

Description

Underground Structure Construction Equipment {DEVICE FOR CONSTRUCTING AN UNDERGROUND STRUCTURE}

The present invention relates to an underground structure construction apparatus, and more particularly, to an underground structure construction apparatus that makes it easy to improve the verticality of the interlayer pillar and to reduce the construction cost.

In the construction of underground structures, the main construction methods for underground structures have been excavated from the ground to the basement ground after installing the retaining wall along the pit soil plan line and supporting external forces such as earth pressure and water pressure as temporary steel supports. Construct the structure from the bottom to the top, and then install the installation method and soil wall to dismantle the temporary steel support in order to form the steel pillars and the pile foundations extended to the foundation structure. The same method as the TOP DOWN method, which allows the construction of ground structures at the same time as the construction, has a DOWNWARD method for constructing ground structures after completing underground structures.

Applicable construction method has limitations. First, in large sites with large underground structures and deep excavation depths, it is necessary to support external forces such as earth pressure and hydraulic pressure acting on the wall, but the deformation is large as temporary steel support. Secondly, in the downtown area where buildings are densely located, this causes a large deformation of the retaining wall and damages to surrounding buildings due to the ground subsidence. Third, the excavation work and the construction work in the state exposed to the outside As a result, there is a problem of environment and civil complaints caused by noise, vibration, and dust, and fourth, there is a problem in that the construction period is lengthened since the permanent structure construction is sequentially performed after the construction of the temporary steel support.

Top down method and down method are used to solve the problem of the sticking method.

However, the top-down method and the down-word method consist of a structure that installs a plurality of steel pillars and an extended pile foundation before the excavation, and connects each layer structure to the steel pillars while the excavation proceeds. Since all loads act on the extended pile foundation, there is a problem in that an expensive material having a high cross-sectional coefficient and a large rigidity is used. And at the bottom of the steel pillar and the pile foundation extending there is a process to improve the bearing capacity by placing concrete in the perforated state.

In addition, before the excavation, each layer structure is installed after the steel pillars and the pile foundations extending from the upper part to the bottom where the pile is formed. It doesn't fit a bit, so it's hard to connect.

The object of the present invention devised in view of the above point is that it takes a lot of cost and construction period, and installs a temporary center pile composed of section steel instead of installing steel pillars and pile foundations connected thereto, and is connected to the earth wall support While installing the first level horizontal structure to be a permanent structure while installing the interlayer column to connect the horizontal structure of each layer from the bottom direction, and the interlayer column is installed to the bottom surface of the excavation part to support the horizontal structure of each layer The present invention provides an underground structure construction apparatus for separating a center pile and allowing the interlayer pillars to support the horizontal structures and the first stage horizontal structures.

Another object of the present invention consists of a structure for installing the horizontal structure of each floor while sequentially installing the interlayer pillar from the top to the bottom direction, the underground structure construction apparatus having an easy feature to maintain the vertical state between the interlayer pillar and each horizontal structure In providing.

Underground structure construction apparatus for achieving the object of the present invention as described above is the earth wall formed on the circumferential surface of the excavated portion to be excavated to install the underground structure; A plurality of center piles to be removable to the excavation portion; A first horizontal structure installed at an upper end of the center pile to be supported by the center pile; And one side is fixed to the first horizontal structure and the other side is a plurality of interlayer pillars to be fixed to the reinforced concrete foundation installed on the bottom surface of the excavated portion; including, the interlayer pillars are installed on the bottom surface of the first stage horizontal structure Supporting, the center pile is separated and the interlayer pillar supports the first horizontal structure.

Underground structure construction apparatus for achieving the object of the present invention as described above is the earth wall formed on the circumferential surface of the excavated portion to be excavated to install the underground structure; A plurality of center piles to be removable to the excavation portion; A first horizontal structure installed at an upper end of the center pile to be supported by the center pile; Each layer horizontal structure is installed to form a layer to the bottom surface of the excavated portion in the bottom direction of the first horizontal structure to support the earth wall; And one side is fixed to the first level horizontal structure or each layer horizontal structure at the top, and the other side is connected to the interlevel horizontal structure at the bottom so that the horizontal structures can be connected sequentially from the first level horizontal structure. Including the pillar; The interlayer pillar is installed by connecting the horizontal structure of each layer in the bottom direction from the first horizontal structure, and the interlayer pillar is installed to the bottom surface to support the horizontal structure of each layer, the center pile The interlayer pillars support the respective horizontal structures and the first stage horizontal structures.

Further, more preferably, the interlayer pillars are arranged in a line to be perpendicular to the horizontal structure of each layer.

In addition, more preferably, the first stage horizontal structure, each layer horizontal structure and the interlayer column is made of a permanent structure.

In addition, more preferably, the first stage horizontal structure, the horizontal structure of each layer and the interlayer column is formed of a section steel, and are bonded to each other by bolting or welding.

Further, more preferably, a temporary horizontal structure for supporting the earth pressure of the retaining wall is further included between the horizontal structures of each layer.

In addition, more preferably, the horizontal structure of each layer is equipped with a locking jaw member so that the connection member can be suspended in the other end of the interlayer pillar.

Further, more preferably, the connecting member has a structure in which four unit rods form a lattice shape, and the interlayer pillar is positioned inside the lattice of the connecting member.

In addition, more preferably, the horizontal structure of each layer is composed of a coupling member for connecting the connecting member to each other.

Further, more preferably, the reinforced concrete slab is further included in each horizontal structure.

In addition, more preferably, the first stage horizontal structure in contact with the retaining wall and the rim reinforcing member for reinforcing the edge portion of the horizontal structure of each layer by reinforced concrete by a certain width further.

Further, more preferably, a reinforcing member filled with reinforced concrete is installed between the first stage horizontal structure and the beam forming the horizontal structure of each layer, and the reinforcing member is connected to the edge reinforcing member.

In addition, more preferably, the connecting member has a structure in which two unit rods cross each other. The interstitial column is located at the intersection where they intersect.

Further, more preferably, the interlayer column is fixed to the reinforced concrete foundation installed on the bottom surface.

In addition, more preferably, the interlayer pillar further includes reinforced concrete so that bearing capacity can be reinforced.

In addition, more preferably, the horizontal structure of each layer further includes an inclined brace member that is fixed to one side is fixed to the retaining wall and the other side is fixed to the each layer horizontal structure.

In addition, more preferably, a plurality of the inclined brace member is installed in the horizontal structure at each angle toward the retaining wall.

Further, more preferably, between the earth wall and one end of each of the inclined bracing member, a belt is further included to connect one end of the inclined bracing member to each other.

More preferably, when the installation of the horizontal structure of each layer is completed up to the bottom surface of the excavated portion and the inclined support member is separated, reinforced concrete is reinforced to form a permanent wall in addition to the retaining wall.

More preferably, the center pile is installed close to the position of the interlayer pillar such that the center pile does not overlap the interlayer pillar supporting the respective horizontal structures and the first horizontal structure after removing the center pile.

Further, more preferably, the center pile further includes a brace member protruding to support the first horizontal structure and the respective horizontal structure.

As described above, the underground structure building apparatus according to the present invention reduces the construction period by constructing an underground structure using a center pile that can be removed and reused instead of steel pillars and pile foundations that require a lot of expensive materials and construction period. And construction costs are reduced.

In addition, since it is possible to install the interlayer pillars sequentially, it is easy to maintain the vertical state between the interlayer pillars and the horizontal structure of each layer, and the workability is improved.

The first stage horizontal structure or each layer horizontal structure is provided with a rim reinforcement member and a reinforcement member to increase the force to withstand the earth pressure applied by the retaining wall has the effect of improving safety.

In addition, since the inclined bracing member is mounted inclined, the installation and removal time of the inclined bracing member is reduced, and the excavation work is prevented from being delayed due to unnecessary interference during the excavation work, thereby improving workability and shortening the construction period.

Figure 1a is a perspective view showing an underground structure construction apparatus which is a preferred embodiment of the present invention,
Figure 1b is an enlarged perspective view of the lower portion of the underground structure building device,
2 is a cross-sectional view showing an underground structure construction apparatus,
3 to 5 is a cross-sectional view showing a rim reinforcing member and a reinforcing member,
6 to 13 is a state diagram showing the process of construction of the underground structure building apparatus,
6 is a state diagram showing a state in which the center file is installed,
7 is a state diagram showing a state in which the first stage horizontal structure is installed,
8 is a state diagram showing a state in which the connecting member of the interlayer pillar and the horizontal structure of each layer,
9 is a state diagram showing a state in which each floor horizontal structure is installed,
10 is a state diagram showing a state in which the additional excavation is progressing and the interlayer pillar and reinforced concrete foundation is installed on the bottom surface,
Figure 11 is a state diagram showing a state in which the center pile is removed and reinforced concrete reinforcement and reinforced concrete slab of the interlayer column progressed,
12 is a state diagram showing a state in which the underground structure is completed.

Hereinafter, with reference to the accompanying drawings, an underground structure construction apparatus which is a preferred embodiment of the present invention in more detail as follows.

Figure 1a is a perspective view showing an underground structure building apparatus according to an embodiment of the present invention, Figure 1b is a perspective view showing an enlarged lower portion of the underground structure building device, Figure 2 is a cross-sectional view showing an underground structure building device, 3 to 5 is a cross-sectional view showing a rim reinforcing member and a reinforcing member, Figures 6 to 13 is a state diagram showing the process of construction of the underground structure construction apparatus, Figure 6 is a state diagram showing a state in which the center pile is installed 7 is a state diagram showing a state in which the first stage horizontal structure is installed, and FIG. 8 is a state diagram showing a state in which the connecting member of the interlayer pillar and the horizontal structure of each layer is mounted, and FIG. 9 is a state in which the horizontal structure of each layer is installed. Figure 10 is a state diagram, Figure 10 is a state diagram showing a state in which additional excavation is carried out and the interlayer pillar and reinforced concrete foundation is installed on the bottom surface, Figure 11 is a center pile Giant and the reinforcement of reinforced concrete and reinforced concrete slab of the inter-pole showing the advanced state is a state diagram, Figure 12 is a state diagram showing a state in the underground structure is completed.

As shown, an underground structure construction apparatus according to an embodiment of the present invention is a mud wall 10 is formed by pressing along the circumferential surface of the excavation portion, a plurality of center piles 20 to be removed to the excavation portion and Is installed at the upper end of the center pile 20, the first stage horizontal structure 30 and the first stage horizontal structure 30 to support the transverse so as to withstand the earth pressure of the retaining wall (10) is fixed to the lower end and extends in the lower direction The interlayer pillar 40 and the interlayer pillar 40 are supported at the ends and each layer horizontal structure 50 supports the wall 10 together with the horizontal structure 30 at the first stage, the interlayer pillar 40 and each layer. Horizontal structures 50 are sequentially installed according to the depth to be excavated to form an underground floor.

The center pile 20 is made of a section steel that is driven more than the depth to be excavated. The section steel and the section steel to be described later include all of the general structure used as a building frame, such as H beam, steel pipe and square tube. After removing the center pile 20, the center pile 20 may not intersect the interlayer pillar 40 installed at a position capable of stably supporting the horizontal structure 50 and the first horizontal structure 30. It is installed close to 40). In addition, the center pile 20 is mounted with a supporting member 21 protruding to support the first horizontal structure 30 or each layer horizontal structure 50.

The first stage horizontal structure 30 and each layer horizontal structure 50 is composed of a permanent structure. The first stage horizontal structure 30 and each layer horizontal structure 50 is made of a section steel and are bonded to each other by bolting or welding.

The first stage horizontal structure 30 is composed of a connecting member 32 for connecting the connecting member 31 and each connecting member 31. The connecting member 31 has a structure in which four unit rods 31a form a lattice shape, and the interlayer pillar 40 is located inside the lattice of the connecting member 31. The interlayer column 40 is most preferably installed at the center point of the connecting member 31, and is connected to the connecting member 31 by the locking jaw member 33.

The connecting member 31 is most preferably arranged in a lattice shape as shown, but the two unit rods are made to intersect with each other, and the interlayer pillar 40 may be installed at the intersections. have.

Like the first stage horizontal structure 30, each layer horizontal structure 50 is composed of a connecting member 51 and a connecting member 52 for connecting each connecting member 51. The connecting member 51 has a structure in which four unit rods 51a form a lattice shape, and the interlayer pillar 40 is located inside the lattice of the connecting member 51. The interlayer pillar 40 is most preferably installed at the center point of the connecting member 51, and is connected to the connecting member 51 by the locking jaw member 53.

The connecting member 51 is most preferably arranged in a lattice shape as shown, but may be composed of a structure in which the two unit rods cross each other, the interlayer pillar 40 is installed in the intersections. have.

The interlayer pillar 40 is made of a permanent structure made of a section steel, and is coupled to the first stage horizontal structure 30 and each layer horizontal structure 50 by bolting and welding.

One end of the interlayer pillar 40 is fixed to the first end horizontal structure 30 or each layer horizontal structure 50 by being connected to the locking jaw members 33 and 53, and the other end of each layer horizontal structure is located at the bottom adjacent to each other. It is connected to the locking jaw member 53 and fixed to the 50. Since the interlayer columns 40 and the horizontal structures 50 are installed one after the other, it is easy to install them at right angles when the horizontal structures 50 are installed on the interlayer columns 40, and the horizontal structures 50 are arranged in a straight line. desirable.

The connecting members 31 and 51 and the coupling members 32 and 52 constituting the first horizontal structure 30 and each horizontal structure 50 are supported by the center pile 20 before being connected to the interlayer pillar 40. The member 21 may be installed and mounted thereon, and the first end and each layered horizontal structure 30 and 50 may be connected to the interlayer pillar 40 and the first end and each layered horizontal structure 30 and 50 may be formed. Before the connection member 31, 51 or coupling member 32, 52 may be connected to the interlayer column (40).

In the case of forming a wide interval between the horizontal structures 50 of each layer while the excavation proceeds, a temporary horizontal structure may be formed between the horizontal structures 50 to withstand the earth pressure of the retaining wall 10. Hypothesis horizontal structure is made of a structure that supports the earth wall (10) with a section steel to withstand earth pressure across the excavation hole, such as each horizontal structure (50). Hypothesis horizontal structures are not permanent structures but structures that are later dismantled.

Reinforced concrete slab 11 is installed in each layer horizontal structure 50 and the first stage horizontal structure 30. The reinforced concrete slab 11 is a top surface of each layer horizontal structure 50 or the first stage horizontal structure 30 made of section steel. It is formed on the top. In addition, the rim reinforcement member 12 for reinforcing the edge portion of each layer horizontal structure 50 and the first stage horizontal structure 30 by reinforced concrete is formed, the edge reinforcement member 12 is a coupling member (32, 52) It is connected to the reinforcing member 13 is reinforced with reinforced concrete between.

The edge reinforcing member 12 and the reinforcing member 13 are formed on the upper surface of the section steel forming the first stage horizontal structure 30 or each layer horizontal structure 50 as shown in FIG. 3, or as shown in FIG. 4. Filled between the first-level horizontal structure 30 or each layer horizontal structure 50, or as shown in Figure 5, the first-level horizontal structure 30 or each layer horizontal structure 50 is filled with the structure between the cross section and between Is formed. Edge reinforcement member 12 and the reinforcement member 13 serves to evenly support the earth pressure generated in the retaining wall (10). In addition, when the reinforcing member 13 is formed between the coupling members 32 and 52, the reinforcing member 13 serves to prevent the occurrence of deflection of the steel by reinforcing the strength of the steel.

Reinforced concrete foundation 14 is formed on the bottom surface of the excavation is completed excavation, the lowermost interlayer column 40 is fixed to the reinforced concrete foundation (14). At this time, the interlayer column 40 is reinforced concrete 41 is formed so that the bearing capacity can be reinforced.

And the inclined bracing member 60 is installed to be inclined at the point where the earth wall 10 and the first end and each layer horizontal structure (30, 50) contact. The inclined brace member 60 is a structure that withstands the earth pressure of the retaining wall 10 in place of the temporary horizontal structure, one side is fixed to the retaining wall 10 and the other side is fixed to the first end and each layer horizontal structure (30, 50) do. At this time, a plurality of inclined bracing member 60 is installed to be opened at a predetermined angle toward the retaining wall 10, the end of the inclined bracing member 60 is provided with a band 61 to connect each other. The strip 61 supports the soil wall 10 in the horizontal direction.

In addition, when the installation of the horizontal structure 50 of each floor to the bottom surface of the excavation portion is completed, the inclined support member 60 is removed, and then when the retaining wall 10 is a temporary structure, the reinforced concrete 10a is reinforced to reinforce the permanent wall. To achieve.

Underground structure construction apparatus is a preferred embodiment of the present invention configured as described above, when constructing the underground structure of two or more basement floors by repeatedly performing the process of installing the interlayer column 40 and each floor horizontal structure (50) Underground structures of two or more floors can be constructed. In addition, in the case of constructing the underground structure of the basement 1 floor, the interlayer pillar 40 connected to the first horizontal structure 30 is directly fixed to the reinforced concrete foundation 14 without installing the interlayer horizontal structure 50. After that, the center file 20 is removed.

As described above, the underground structure building apparatus according to the present invention installs the horizontal structures 50 on each floor while extending the interlayer column 40 from the first horizontal structure 30 in the lower direction while the excavation work is carried out, and reinforced concrete foundation ( 14) After fixing the lowermost interlayer column 40, the center pile 20 is removed.

In addition, the retaining wall member 10 is also inclined bracing member 60 is removed and reinforced concrete 10a is reinforced to the retaining wall 10 to form a permanent wall. Since the inclined brace member 60 is installed to be inclined at the edge of the first horizontal structure 30 or each layer horizontal structure 50, the excavation work or the construction of installing the horizontal structure 50 each layer is caused by interference. Difficulty of working has a feature, and serves to effectively support the earth pressure acting on the retaining wall (10).

As shown in FIG. 6, after proceeding with the installation of the retaining wall for installing the retaining wall 10 on the circumferential surface of the excavated portion, the center pile indentation step of inserting the plurality of center piles 20 in the excavating portion can be removed. Is carried out. At this time, the center pile 20 is placed in the vicinity so as not to contact the point where the interlayer pillar 40 to be installed later.

As shown in FIG. 7, the support member 21 is installed at the upper end of the center pile 20 which is indented, and the first stage horizontal structure 30 is installed. The brace member 21 is formed in the center pile 20 at regular intervals so as to support the horizontal structure 50, which is installed sequentially. Then, the first stage is connected to the connection member 31 constituting the horizontal structure 30 to install another connecting member 51 to form a layer, and when the excavation work proceeds to sequentially lowered to the required position and the interlayer pillar 40 in that state Perform the work of connecting. At this time, the connecting member 51 to be additionally connected is equipped with the number corresponding to the underground floor to be constructed. In other words, if you want to construct a two-story underground structure, one connecting member 51 is mounted to form a layer, and if you want to construct a three-story underground structure, two connecting members 51 are mounted to form a layer. .

When the installation of the first stage horizontal structure 30 is completed, as shown in FIG. 8, after performing the interlayer pillar installation step of connecting the first interlayer pillar 40 to the first stage horizontal structure 30, the interlayer pillar 40. At the other end of the connection layer 51 of each horizontal structure 50 installation step is carried out. In this case, the support member 21 may be additionally installed so that the connection member 51 may be supported by the center pile 20.

Then, as shown in FIG. 9, the coupling member installation step of installing the coupling member 52 for connecting the connection member 51 is performed to complete the installation of each horizontal structure structure 50.

Each layer horizontal structure 50 is characterized in that it is easy to install so as to form a right angle with the interlayer column 40, and when the installation of each layer horizontal structure 50 is completed to perform additional excavation work to the next layer. The interlayer pillar installation step and the horizontal structure installation step of each floor are repeatedly performed according to the underground depth to be excavated.

When the excavation is completed to the bottom surface of the excavated portion shown in Figure 10 is connected to the interlayer pillar 40, install a reinforced concrete foundation 14 to securely fix the interlayer pillar 40 on the bottom surface of the excavated portion Carry out the basic installation step. At this time, the reinforced concrete foundation 14 may proceed in the order of constructing the reinforced concrete foundation 14 after installing the interlayer pillar 40 as shown, or after installing the reinforced concrete foundation 14, thereon It may proceed in the order of installing the column 40.

After firmly fixing the interlayer column 40 to the reinforced concrete foundation 14, the center pile 20 is removed as shown in FIG. Before removing the center pile 20, the clubs 70 may be installed at the lower part of the horizontal structure 50 or the first level horizontal structure 30 in order to share the load applied to the interlayer pillar 40. The interlayer pillar reinforcement step for reinforcing the reinforced concrete 41 is performed. A slab forming step of forming a reinforced concrete slab 11 on each horizontal structure 50 is carried out. At this time, the first stage and each floor horizontal structure (30, 50) can be installed in each floor in order to share with the interlayer column 40 before being reinforced with reinforced concrete. Repeat the reinforcement step and slab formation step to the upper end. Reinforced concrete slab (11) is formed only on a portion of the first stage horizontal structure 30 or each layer horizontal structure 50 when gulting work in progress, and after the gulting work is completed in front of the horizontal structure 50 of each layer Form.

In addition, between the first horizontal structure 30 and each layer of the horizontal structure 50 in contact with the retaining wall 10 and the edge of the horizontal structure 50 and the retaining wall 10 as shown in FIG. A frame reinforcing member installation step of installing the frame reinforcing member 12 to the thickness of the sum of the thickness of the horizontal structure (30, 50) and reinforced concrete slab 11 is performed. The edge reinforcing member 12 may be formed of reinforced concrete having rigidity so that the earth pressure of the retaining wall 10 may be distributed at the first stage and each horizontal structure 30 and 50. In addition, the step of installing the reinforcing member 13 filling the reinforced concrete between the connecting members 31 and 51 and the coupling members 32 and 52 may be performed. This is to increase the ability of resisting earth pressure in the part where the first stage and each layer horizontal structure 30, 50 are formed only with the steel, or the equipment or the like to be placed on the first stage and each layer horizontal structure 30, 50 for work. This is to prepare for structural reinforcement such as increasing bending stiffness. The edge reinforcing member 12 and the reinforcing member 13 are installed on the top surfaces of the connecting members 31 and 51 and the coupling members 32 and 52 as shown in FIG. 3, or connected as shown in FIG. 4. Installed between the members 31 and 51 and the inner surfaces of the coupling members 32 and 52, or on and in the upper surfaces of the connecting members 31 and 51 and the coupling members 32 and 52 as shown in FIG. It can be installed simultaneously between the sides. At this time, the portion of the interlayer pillar 40 on the inner surface of the connecting members 31 and 51 may be left in the reinforced concrete, so that the interlayer pillar 40 and the reinforced concrete 41 may be integrated from the bottom. . And when the edge reinforcing member 12 and the reinforcing member 13 is formed in a structure that is connected to each other, the resistance to earth pressure generated in the retaining wall 10 is increased, but the edge reinforcing member 12 and reinforcing member 13 ) May be formed in a structure that is not connected to each other.

While installing the horizontal structures 50 for each floor, the inclined bracing member 60 is installed. In the inclined bracing member installation step, a plurality of inclined bracing members 60 are installed at a predetermined angle toward the retaining wall 10, and a belt length 61 is installed to connect the ends of the inclined bracing members 60. The inclined brace member 60 may be dismantled after the horizontal structure 50 is installed at the lower portion, or may be separated from the bottom surface side in turn when the construction is completed up to the bottom surface of the excavation portion, and the earth wall 10 If it is not this permanent wall, reinforced concrete 10a earth pressure wall may be disassembled after installation.

As shown in FIG. 12, when the reinforcement step of the reinforced concrete interlayer pillar, the slab installation step and the retaining wall reinforcement step are performed to the first horizontal structure 30, the installation of the underground structure is completed.

In the excavation work period as described above, the load of the first horizontal structure 30 or each layer horizontal structure 50 is mainly supported on the center pile 20, and the interlayer pillar 40 is supported on the reinforced concrete foundation 14. After that, the center pile 20 is removed, and the interlayer pillar 40 supports the first horizontal structure 30 and each layer horizontal structure 50.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

10: retaining wall 20: center pile
30: first horizontal structure 40: interlayer column
50: horizontal structure of each layer 60: inclined bracing member

Claims (21)

An earth retaining wall formed on the circumferential surface of the excavated portion to be excavated to install the underground structure;
A plurality of center piles to be removable to the excavation portion;
A first horizontal structure installed at an upper end of the center pile to be supported by the center pile; And
One side is fixed to the first horizontal structure and the other side a plurality of interlayer pillars to be fixed to the reinforced concrete foundation is installed on the bottom surface of the excavation portion;
And the interlayer pillar is installed on the bottom surface to support the first horizontal structure, and the center pile is separated and the interlayer pillar supports the first horizontal structure. An earth retaining wall formed on the circumferential surface of the excavated portion to be excavated to install the underground structure;
A plurality of center piles to be removable to the excavation portion;
A first horizontal structure installed at an upper end of the center pile to be supported by the center pile;
Each layer horizontal structure is installed to form a layer to the bottom surface of the excavated portion in the bottom direction of the first horizontal structure to support the earth wall; And
One side is fixed to the first level horizontal structure or each layer horizontal structure at the top so that the horizontal structure can be installed sequentially from the first level horizontal structure, the other side is a plurality of interlayer pillars are connected to the adjacent horizontal interlayer structure Including;
The interlayer column is installed by connecting the horizontal structure of each layer from the first horizontal structure to the bottom direction, and the interlayer pillar is installed to the bottom surface to support the horizontal structure of each layer, the center pile is separated and the interlayer pillar Underground structure building apparatus, characterized in that for supporting the horizontal structure and the first stage horizontal structure of each layer. The method of claim 2, wherein the interlayer pillar
Underground structure construction apparatus, characterized in that arranged in a line to form a right angle with the horizontal structure of each floor. The underground structure construction apparatus according to claim 2, wherein the first horizontal structure, each horizontal structure, and the interlayer column are made of a permanent structure. The underground structure construction apparatus of claim 2, wherein the first horizontal structure, the horizontal structure of each layer, and the interlayer column are formed of a section steel, and are joined to each other by bolting or welding. The method of claim 2, wherein the horizontal structure between each layer
Underground structure construction apparatus further comprises a temporary horizontal structure for supporting the earth pressure of the earth wall. The underground structure construction apparatus according to claim 5, wherein the horizontal structure of each layer is provided with a latching member so that the connection member can be suspended at the other end of the interlayer pillar. According to claim 7, wherein the connection member is made of a structure in which the four unit rods form a lattice shape, the underground structure building apparatus, characterized in that the interlayer column is located inside the grid of the connection member. According to claim 8, wherein the horizontal structure of each layer underground structure building apparatus, characterized in that consisting of a coupling member for connecting the connecting member to each other. The horizontal structure of claim 9, wherein
Underground structure building apparatus, characterized in that it further comprises a reinforced concrete slab. 11. The method according to any one of claims 2 to 10, characterized in that it further comprises a rim reinforcing member for reinforcing the edge portion of the horizontal structure of the first stage horizontal structure and each layer horizontal structure in contact with the retaining wall with reinforced concrete by a predetermined width. Underground structure building device. 12. The method of claim 11,
And a reinforcing member filled with reinforced concrete between the first stage horizontal structure and the section steel forming the horizontal structure of each layer, and the reinforcing member is connected to the edge reinforcing member. The method of claim 7, wherein the connecting member is made of a structure in which two unit rods cross each other. Underground structure building apparatus, characterized in that the interlayer column is located at the intersection crossing. The underground structure construction apparatus according to claim 13, wherein the interlayer column is fixed to a reinforced concrete foundation installed on a bottom surface. The method of claim 14, wherein the interlayer pillar
Underground structure construction apparatus characterized in that it further includes reinforced concrete so that the bearing capacity can be reinforced. The horizontal structure of any one of claims 2 to 10,
One side is fixed to the retaining wall and the other side is an underground structure construction apparatus further comprises an inclined bracing member is installed to be inclined fixed to the horizontal structure of each layer. The method of claim 16, wherein the horizontal structure of each layer
Underground structure construction apparatus, characterized in that a plurality of the inclined brace member is installed to be opened at a predetermined angle toward the retaining wall. 18. The method of claim 17, Between the earthen wall and one end of each of the inclined bracing member, Underground structure building apparatus further comprising a belt for connecting one end of the inclined bracing member to each other. 19. The method of claim 18, wherein when the installation of the horizontal structure of each layer is completed up to the bottom surface of the excavated portion and the inclined support member is separated,
Underground structure construction apparatus, characterized in that reinforced concrete is reinforced to form a permanent wall in addition to the retaining wall. The method according to any one of claims 2 to 10, wherein the center pile is
After the removal of the center pile, underground structure building apparatus, characterized in that installed close to the position of the inter-layer column so as not to overlap the inter-layer column for supporting the horizontal structure and the first-level horizontal structure. 21. The basement construction device according to claim 20, wherein the center pile further includes a brace member protruding to support the first horizontal structure and each horizontal structure.

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