KR20210119935A - Underground structure using strut and method construturing the same - Google Patents

Abstract

The present invention relates to an underground structure using a strut and a construction method thereof. The present invention includes: an underground continuous wall including a plurality of peristyle type posts stuck in the ground in a polygonal, closed curve, or two-line form to support an earth wall; a plurality of middle piles stuck in the ground in an inner area of the underground continuous wall; an inner concrete wall in which a plurality of concrete panels are arranged in horizontal and vertical directions along the underground continuous wall to be brought into contact with the underground continuous wall; a floor body constructed in an inner underground floor of the inner concrete wall; a first inter-floor body constructed at a set height in a vertical direction from the floor body; a first outer concrete wall constructed by a set thickness on the inner concrete wall located in a space between the floor body and the first inter-floor body; and first middle support bodies constructed by surrounding the middle piles located in the space between the floor body and the first inter-floor body, respectively. Accordingly, the present invention is capable of shortening a construction period by facilitating the installation of an underground structure including a temporary structure; and improving economic feasibility by minimizing an underground installation space while substantially supporting pressure of an earth wall by excavation phase.

Description

Underground structure using braces and their construction method

The present invention relates to an underground structure using a brace and a construction method therefor.

In general, underground vertical structures such as vertical tunnels and underground structures installed in the ground are set by repeating the process of driving piles into the ground, installing earth plates while excavating the ground, installing wales on the piles, and installing earth anchors on the earth wall. Construct to the depth, install a form such as plywood or steel from the underground floor, and pour concrete on site for construction. However, such a construction method has disadvantages in that the construction is complicated and expensive because it is necessary to remove the form such as plywood or steel after constructing the underground vertical structure.

Republic of Korea Patent No. 10-1322089 (published on October 28, 2013) (hereinafter referred to as prior art) proposes a wall construction method in which a wale is installed on a retaining wall to support the wale and the PC wall with braces. However, in the prior art, the installation sequence of the PC wall is complicated, and the backfill construction is impossible because a wale is installed on the back side, so voids are generated in the basement. have. In addition, when installing a wale on a vertical pile, welding and bolting are performed, but there is no way to dismantle and recover temporary steel materials because there is not enough space to access the back side of the PC wall, making it difficult to dismantle the wale. Therefore, there is a disadvantage of lowering the economy.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an underground structure using a brace and a construction method thereof, which is simple in construction and shortens the construction period.

Another object of the present invention is to provide an underground structure using braces and a construction method thereof, which forms a space in the vertical direction by minimizing the installation space in the ground while firmly supporting the pressure of the earth wall.

In order to achieve the object of the present invention as described above, the steps of constructing an underground continuous wall by installing column-type piles to form a polygonal or closed curve shape in the ground to construct an underground structure; driving intermediate piles into the ground of the inner region of the underground continuous wall; The ground excavation area surrounded by the column-type piles is excavated to a unit depth, and the concrete panels are arranged to form a polygonal or closed curve in the horizontal direction along the column-type piles so as to contact the exposed column-type piles excavated to the unit depth. a unit inner wall construction step of constructing a unit inner concrete wall by installing steel beams to support the arranged concrete panels; repeating the unit inner wall construction step a plurality of times to a set depth to construct an inner concrete wall; pouring abandoned concrete on the inner basement floor of the inner concrete wall; constructing a waterproofing layer on the inner concrete wall and the abandoned concrete; pouring floor concrete on the waterproof layer of the discarded concrete; Demolition of steel beams installed in the unit inner wall construction step adjacent to the floor concrete; Install the first formwork on the inner concrete wall to pour the unit outer concrete wall following the inner concrete wall of the area where the steel support beams have been removed, and install the second formwork on each of the intermediate piles to pour the unit intermediate support. and constructing the unit outer concrete wall and the unit intermediate supports by pouring and curing the concrete respectively on the first and second formwork; Placing girders in the horizontal direction on top of the unit outer concrete wall and the unit intermediate supports, mounting the deck slabs on the girders in the horizontal direction, and constructing the interfloor floor by pouring the topping concrete on the deck slabs ; Demolition of steel beams installed in the unit inner wall construction step adjacent to the interfloor floor; Install the first formwork on the inner concrete wall to pour the unit outer concrete wall following the inner concrete wall of the area where the steel support beams have been removed, and install the second formwork on each of the intermediate piles to pour the unit intermediate support. and constructing the unit outer concrete wall and the unit intermediate supports by pouring and curing the concrete respectively on the first and second formwork; and installing girders in the horizontal direction on the upper part of the unit outer concrete wall and the unit intermediate supports, installing the deck slabs on the girders in the horizontal direction, and constructing the interfloor floor by pouring the topping concrete on the deck slabs. There is provided a method for constructing an underground structure using a beotimbo, including a step;

The concrete panel is supported on the underground continuous wall by a support means, and the support means includes a plurality of through holes formed in the concrete panel and an anchor bolt inserted into the through hole of the concrete panel and embedded in the underground continuous wall or It is preferable to include a fixing pin.

The first formwork preferably includes concrete panels for formwork arranged in a horizontal direction at a distance from the inner concrete wall, and a connection unit for connecting the concrete panels for formwork to the inner concrete wall, respectively.

Preferably, the second form includes two concrete half barrels forming a pair surrounding the intermediate pile, and a connection unit for connecting and fixing the two concrete half barrels.

The unit outer concrete wall includes a protrusion on which one end of the girder is mounted horizontally protruded from the upper end, and the unit intermediate support protrudes from the upper end in the horizontal direction and one end of the girders is mounted. It is preferable to include

In addition, the underground continuous wall including a plurality of column-type piles that support the earth wall by being driven into the ground in the form of a polygonal or closed curve; a plurality of intermediate piles embedded in the ground in the inner region of the underground continuous wall; an inner concrete wall in which a plurality of concrete panels are arranged in horizontal and vertical directions along the continuous underground wall so as to be in contact with the underground continuous wall; a floor body constructed on the inner basement floor of the inner concrete wall; a first interfloor floor constructed at a height set in a vertical direction from the floor; a first outer concrete wall constructed to a thickness set on an inner concrete wall located in a space between the floor and the first interfloor; and first intermediate supports respectively wrapped with concrete and constructed on intermediate piles positioned in the space between the floor and the first interfloor floor, wherein the first and second interfloor floors are formed from the outer concrete wall and the outer concrete wall, respectively. A plurality of girders mounted in a horizontal direction between intermediate supports, deck slabs mounted on the girders, and topping concrete poured on the deck slabs, wherein the outer concrete wall is horizontally disposed on the upper end It is preferable to include a protrusion on which one end of the girder is protruded, and the intermediate support includes a protrusion on which one end of the girders is mounted by protruding in the horizontal direction from the upper end.

A second interlayer floor constructed at a height set in the vertical direction from the first interfloor floor, and a second outer concrete wall constructed to a predetermined thickness on the inner concrete wall located in the space between the first and second interfloor floors And, it is preferable to further include second intermediate supports respectively wrapped with concrete in the intermediate piles located in the space between the first and second interfloor floors.

In the underground structure using the brace of the present invention, a continuous underground wall is installed in the ground in the form of polygons, closed curves, and two straight lines to support the earth wall and to contact the continuous underground wall with a plurality of concrete in the horizontal and vertical directions. The panels are arranged to constitute the inner concrete wall, the floor is provided on the inner basement floor of the inner concrete wall, the first outer concrete wall is provided with a thickness set in the inner concrete wall, and the first interfloor floor is provided at intervals in the vertical direction. It not only supports the pressure of the soil wall firmly, but also forms a plurality of spaces in the vertical direction.

In addition, the underground structure construction method of the present invention installs cast piles and intermediate piles, constructs the inner concrete wall to a set depth while repeating the unit inner wall construction step, and pours discarded concrete on the inner basement floor of the inner concrete wall Then, after constructing the waterproofing layer, then pouring the floor concrete, and then constructing the unit outer concrete wall, the unit intermediate support, and the interfloor floor, it is easy to construct an underground structure having a plurality of internal spaces in the vertical direction while supporting the earth wall. The underground structure is constructed quickly and firmly, and the inner concrete wall is supported without a separate support material such as an earth anchor to support the inner concrete wall. Structures can be freely installed in adjacent downtown areas.

In addition, in the present invention, since the interlayer support is formed by mounting the girders on the unit outer concrete wall and the unit intermediate supports, and the deck slabs are mounted on the girders, then pouring the topping concrete, the construction of the interlayer support becomes easy and simple.

In addition, the present invention does not require backfilling of the backside of the structure after the installation of the underground structure is completed, so the amount of excavated soil is small, so the economic efficiency is excellent.

1 is a flowchart illustrating an embodiment of a method for constructing an underground structure using a brace according to the present invention.
2a to 2i are a side view and a plan view respectively showing an embodiment of the underground vertical structure construction method according to the present invention in stages of construction,
3 is a front sectional view showing an embodiment of an underground structure using a brace according to the present invention;
4 is a plan view showing an embodiment of an underground structure using a brace according to the present invention;
5 is a plan cross-sectional view of a unit intermediate support constituting an embodiment of an underground structure using a brace according to the present invention.

Hereinafter, an embodiment of an underground structure using a brace according to the present invention and a construction method thereof will be described with reference to the accompanying drawings.

1 is a flowchart illustrating an embodiment of a method for constructing an underground structure using a brace according to the present invention.

As shown in Figure 1, an embodiment of the method for constructing an underground structure using a brace according to the present invention is to form a polygonal, closed curve, or two-row straight line in the ground on which the underground structure is to be constructed. A step (S1) of installing and constructing the underground continuous wall (W) proceeds (refer to FIGS. 2a and 2b). When viewed from above, the continuous underground wall (W) is installed in one of a polygonal, closed curve, two-row straight shape, a square, hexagonal, circular, oval, and two-row straight shape. In the underground continuous wall (W), in the ground that does not require water protection, it is constructed as a retaining wall of earth plate type. Hereinafter, a case in which the columnar piles 10 are installed in a rectangular shape will be described. Since the technology for installing the column-type piles 10 in the ground is a general technology, a detailed description thereof will be omitted.

After constructing the continuous underground wall (W), the step (S2) of driving the intermediate piles 20 into the ground of the inner region of the underground continuous wall (W) proceeds (see FIGS. 2a and 2b). Intermediate piles (W) are arranged in a line or arranged in a plurality of columns according to the size of the inner region of the underground continuous wall (W), it is preferable that the intervals are uniformly arranged from each other.

After driving the intermediate piles (W), the ground excavation area surrounded by the column-type piles 10 is excavated to a unit depth, and the column-type piles ( 10) The concrete panels 30 are arranged to form a polygonal or closed curve in the horizontal direction, and the steel support beams 40 are installed to support the arranged concrete panels 30 to construct the unit inner concrete wall (UW1) The unit inner wall construction step (S3) proceeds (see Fig. 2c). Before installing the concrete panels 30, the ground may be excavated to a certain depth, and a wale and a brace 40' may be installed. Each of the concrete panels 30 has a uniform thickness and is preferably a square panel forming a plane, and may also be a hexagonal panel or a triangular panel. When the unit inner concrete wall UW1 has a circular cross-sectional shape, the concrete panels 30 constituting the unit inner concrete wall UW1 are each formed as curved panels having a uniform thickness and the same radius of curvature. The concrete panels 30 are arranged in a horizontal direction, each standing in a vertical direction and supported on the underground continuous wall (W), and the concrete panels 30 arranged in a row in the horizontal direction are supported by steel braces 40 . The concrete panel 30 is preferably supported on the underground continuous wall (W) by the supporting means (G). As an example of the support means (G), as shown in FIG. 2c, the support means (G) includes a plurality of through holes (1) provided in the concrete panel (30) and the through holes of the concrete panel (30). It includes a fixing pin (or anchor bolt) (2) inserted through (1) and embedded in the underground continuous wall (W). That is, in a state in which the concrete panel 30 is supported on the continuous underground wall (W), the fixing pin (2) is driven into the underground continuous wall (W) through the through hole (1) of the concrete panel 30 to form the concrete panel (30). ) is supported. As another example of the support means (G), the support means is provided on the back surface of the locking brackets coupled to the column-type piles 10 of the underground continuous wall (W), and the concrete panel 30 is caught by the locking brackets. Includes a locking groove. That is, when the engaging brackets are coupled to the column-type pile 10 of the continuous underground wall (W) and the concrete panel 30 is supported on the continuous underground wall (W), the engaging groove provided at the rear of the concrete panel 30 is caught. It is supported by hanging on the brackets. In the unit inner wall construction step (S3), the wale 50 is installed on the concrete panels 30 arranged along the column-type piles 10, and the steel support beams 40 are installed on the wale 50 to install the concrete panel. It is desirable to support (30).

After the unit inner wall construction step (S3), the unit inner wall construction step (S3) is repeated a plurality of times to a set depth to construct the inner concrete wall (UW) (S4) proceeds (see Fig. 2d). That is, the inner concrete wall UW composed of the unit inner concrete walls UW1 has a length in the vertical direction and has a polygonal or closed curve shape in cross section. And the steel beams 40 are positioned at intervals set in the vertical direction.

After constructing the inner concrete wall (UW), the step (S5) of pouring the discarded concrete 71 on the inner underground floor of the inner concrete wall (UW) proceeds (see Fig. 2e).

After pouring the discarded concrete 71, and after the discarded concrete 71 is cured, the step (S6) of constructing the waterproofing layer 72 on the inner concrete wall UW and the discarded concrete 71 is performed (see Fig. 2e). ).

After constructing the waterproof layer 72 on the discarded concrete 71, the step (S7) of pouring the floor concrete 73 on the waterproofing layer 72 of the discarded concrete 71 proceeds (see FIG. 2e). The upper surface of the bottom concrete 73 is preferably poured so as to be located above the lower end of the inner concrete wall (UW).

After pouring the concrete floor 73, adjacent to the concrete floor 73, the step (S8) of dismantling the steel support beams 40 installed in the unit inner wall construction step (UW1) proceeds. That is, the steel support beams 40 located just above the floor concrete 73 are removed.

After removing the steel braces 40, the first formwork is installed on the inner concrete wall (UW) to pour the unit outer concrete wall (OW1) following the inner concrete wall (UW) in the area where the steel support beams 40 are removed. Install the second formwork to pour the unit intermediate support (CW1) to the intermediate piles 20, respectively, and pour and cure the concrete in the first and second forms, respectively, to form the unit outer concrete wall (OW1) and the unit intermediate support. A step (S9) of constructing (CW1) proceeds (refer to FIG. 2f). The height of the unit outer concrete wall (OW1) and the height of the unit intermediate support (CW1) are preferably constructed to be the same.

The first formwork has a predetermined height in the concrete floor 73 and is installed at a set interval with the inner concrete wall UW. As an example of the first formwork, the first formwork is a plate-shaped formwork concrete panel 81 arranged in the horizontal direction on the upper surface of the floor concrete 73 at a distance from the inner concrete wall UW, and the formwork It is preferable to include a connection unit 82 for connecting the concrete panels 81 to the inner concrete wall UW so as to maintain a gap therebetween. As an example of the connecting unit 82 , the connecting unit 82 is embedded in the inner concrete wall UW, the inner bolt 3 with the male screw portion exposed to the outside, and the connecting nut to the male screw portion of the inner bolt 3 . Both bolts 5 connected by (4) and inserted through and inserted into the concrete panel 81 for formwork, respectively located on both sides of the concrete panel 81 for formwork, to one male thread part of both bolts 5 It includes two fastening nuts (6) to be fastened. In this way, when the first formwork 81 is installed as the concrete panel 81 for formwork, there is no need to install a separate formwork scaffold, etc., so the construction is very simple. On the other hand, the first formwork may be a wood panel or a metal panel, and in this case, an on-site casting is performed.

It is preferable that the unit outer concrete wall OW1 includes a mounting protrusion 7 protruding in the horizontal direction at the upper end. That is, the unit outer concrete wall (OW1) has a uniform thickness, the upper end is provided with a protrusion (7) protruding in the horizontal direction.

The unit outer concrete wall OW1 may be constructed using the first formwork twice. That is, the unit outer concrete wall OW1 is constructed using an upper first formwork capable of forming a roughening protrusion and a lower first formwork capable of forming a lower portion thereof.

The second formwork has a set height. As an example of the second form, the second form surrounds the intermediate pile 20, and the two concrete half barrels 61 forming a pair, and the two concrete half barrels 61 are connected and fixed. unit 62 . The unit intermediate support (CW1) is preferably a circular or square-shaped column. When the intermediate unit support (CW1) is a rectangular column, the cross-sectional shape of the concrete half barrel (61) is a digut shape, and when the unit intermediate support (CW1) is a circular-shaped column, the cross-sectional shape of the concrete half barrel (61) is become semicircular.

It is preferable that the unit intermediate support CW1 includes a mounting protrusion 8 protruding in the horizontal direction at the upper end. That is, when the unit intermediate support (CW1) is a rectangular pillar, the upper end of the rectangular pillar is provided with a mounting protrusion 8 protruding horizontally across four sides.

The unit intermediate support (CW1) may be constructed using the second formwork twice. That is, the unit intermediate support CW1 is constructed using an upper second formwork capable of forming a roughening protrusion and a lower second formwork capable of forming a lower portion thereof.

Meanwhile, the unit intermediate support CW1 may include a circular or rectangular column and a connecting wall connecting adjacent columns to each other in a horizontal direction.

After constructing the unit outer concrete wall (OW1) and the unit intermediate support (CW1), the girders 91 are mounted on the upper part of the unit outer concrete wall (OW1) and the unit intermediate support (CW1) in the horizontal direction, and the girders 91 ), the deck slabs 92 are mounted in the horizontal direction, and the topping concrete 93 is poured on the deck slabs 92 to construct the interfloor (S) step (S10) proceeds (see Fig. 2g). ). The girder is mounted on the upper end of the unit outer concrete wall OW1 and the upper end of the unit intermediate support CW1, and the girder 91 is mounted on the upper end of two adjacent unit intermediate supports CW1. The deck slab 91 is formed in a plate shape, and the deck slab 91 is arranged to form the same plane. The concrete floor 73, the interlayer floor S, and the unit outer concrete wall(s) OW1 form one space.

After constructing the interfloor (S), the step (S11) of dismantling the steel support beams (40) installed in the unit inner wall construction step (S3) adjacent above the interfloor (S) is proceeded.

After removing the steel braces 40, the first formwork is installed on the inner concrete wall (UW) to pour the unit outer concrete wall (OW1) following the inner concrete wall (UW) in the area where the steel support beams 40 are removed. Install the second formwork to pour the unit intermediate support (CW1) to the intermediate piles 20, respectively, and pour and cure the concrete in the first and second forms, respectively, to form the unit outer concrete wall (OW1) and the unit intermediate support. A step (S12) of constructing (CW1) proceeds (see FIG. 2H). It is preferable to install the first and second formwork in the same way as installing the first and second formwork in the above step.

After constructing the unit outer concrete wall (OW1) and the unit intermediate support (CW1), the girders 91 are mounted on the upper part of the unit outer concrete wall (OW1) and the unit intermediate support (CW1) in the horizontal direction, and the girders 91 ), the step (S13) of installing the deck slabs 92 in the horizontal direction, and pouring the topping concrete 93 on the deck slabs 92 to construct the interlayer floor (S) (S13) proceeds (see FIG. 2i). ). In this way, the step of constructing the interlayer floor (S) is preferably performed in the same manner as the step of constructing the above interlayer floor (S). The two interfloor floors S and the unit outer concrete wall(s) OW1 between the two interfloor floors S form one space.

Remove the steel support beams 40 installed by the unit inner wall construction step, construct the unit outer concrete wall (OW1) and the unit intermediate support (CW1), and repeat the process of constructing the interfloor floor (S) adjacent to the ground while repeating the process Construct the inter-floor floor (S) or construct the inter-floor (S0) above the ground.

3 is a front cross-sectional view showing an embodiment of an underground structure using a brace according to the present invention. 4 is a plan view showing an embodiment of an underground structure using a brace according to the present invention.

As shown in FIGS. 3 and 4, an embodiment of an underground structure using a brace according to the present invention is an underground continuous wall (W), intermediate piles (20), an inner concrete wall (UW), a floor body (70) ), a first interlayer floor (S1), a first outer concrete wall (80A), and a first intermediate support (C1).

The underground continuous wall (W) includes columnar piles (10) embedded in the ground in the form of a polygon, a closed curve, or a double straight line when viewed from above. Hereinafter, a case in which the columnar piles 10 are installed in a rectangular shape will be described. Since the technology for installing the column-type piles 10 in the ground is a general technology, a detailed description thereof will be omitted.

The intermediate piles 20 are embedded in the ground in the inner region of the underground continuous wall (W). Intermediate piles 20 are arranged in a line or arranged in a plurality of columns according to the size of the inner region of the underground continuous wall (W), and it is preferable that the intervals are uniformly arranged from each other.

The inner concrete wall UW includes a plurality of concrete panels 30 arranged in horizontal and vertical directions along the underground continuous wall W so as to be in contact with the underground continuous wall W. The concrete panel 30 is preferably supported on the underground continuous wall (W) by the supporting means (G). As an example of the supporting means (G), the supporting means (G) is inserted through a plurality of through holes (1) provided in the concrete panel (30) and the through holes (1) of the concrete panel (30) to be underground. Includes a fixing pin (or anchor bolt) (2) that is driven into the continuous wall (W) (see Fig. 2c).

The floor body 70 is constructed on the inner basement floor of the inner concrete wall (UW). The floor body 70 is a cast concrete 71 poured on the inner subsurface floor of the inner concrete wall UW, a waterproof layer 72 provided on the upper surface of the abandoned concrete 71, and the waterproof layer 72 of It includes a concrete floor (73) poured upwards.

The first interlayer floor (S1) is constructed at a height set in the vertical direction from the floor (70) to form a space together with the inner concrete wall (UW) and the floor (70). The first interlayer floor (S1) has a plurality of girders (91) mounted in the horizontal direction between the first outer concrete wall (80A) and the first intermediate supports (C1), respectively, and the girders (91). The deck slabs 92 are mounted, and the topping concrete 93 poured on the deck slabs 92 is included. The first outer concrete wall 80A includes a protrusion 7 protruding from the upper end in the horizontal direction and on which one end of the girder 91 is mounted, and the first intermediate support C1 is protruded at the upper end in the horizontal direction. It includes a protrusion 8 on which one end of the girders 910 is mounted. The deck slab 92 is formed in a plate shape, and the deck slabs 92 are arranged to form the same plane.

The first outer concrete wall 80A is constructed to a thickness set in the inner concrete wall UW located in the space between the floor 70 and the first interlayer floor S1. The first outer concrete wall 80A is a concrete panel 81 for formwork positioned at a distance from the inner concrete wall UW, and a connection that maintains the interval between the inner concrete wall UW and the concrete panel 81 for formwork It includes a unit 82 and the filled concrete 86 that is poured and cured between the inner concrete wall UW and the concrete panel 81 for the formwork. As an example of the connection unit 82 , the connection unit 82 includes an inner bolt, both bolts, and fixing nuts, and the connection unit 82 is as described above (see FIG. 2f ). The first outer concrete wall 80A, the floor 70, and the first interlayer floor S1 form one space.

The first intermediate supports C2 are formed of concrete enclosing the intermediate piles 20 in the intermediate piles 20 positioned in the space between the floor body 70 and the first interlayer floor S1, respectively. The first intermediate support C2, as shown in FIG. 5, surrounds the intermediate pile 20, and forms a pair of two concrete half barrels 61 and the two concrete half barrels 61. It includes a connecting unit 62 for connecting and fixing them, and a filled concrete 63 filled between the two concrete half barrels 61 . When the first intermediate support (C1) is a rectangular column, the cross-sectional shape of the concrete half barrel (61) is a digut-shape, and when the first intermediate support (C1) is a circular-shaped column, the cross section of the concrete half barrel (61) The shape becomes a semicircle shape.

In addition, the present invention is located in the space between the second interfloor S2 constructed at a height set in the vertical direction from the first interfloor S1 and the first and second interfloor floors S1 and S2. The second outer concrete wall 80B constructed to a thickness set in the inner concrete wall UW and the intermediate piles 20 located in the space between the first and second interlayer floors S1 and S2, respectively It may further include second intermediate supports (C2) wrapped in concrete. The second interfloor S2 is preferably the same as the configuration of the first interfloor S1, and the second outer concrete wall 80B is preferably the same as the configuration of the first outer concrete wall 80A, The second intermediate support (C2) is preferably the same as that of the first intermediate support (C1).

Hereinafter, the operation and effect of the underground structure and its construction method using the beotimbo according to the present invention will be described.

In the underground structure using the brace of the present invention, a continuous underground wall (W) is installed in the ground in the form of a polygonal, closed curve, or two-row straight line to support the earth wall and to contact the underground continuous wall (W). A plurality of concrete panels 30 are arranged in the horizontal and vertical directions to constitute the inner concrete wall (UW), and the floor 70 is provided on the inner basement floor of the inner concrete wall (UW), and the inner concrete wall (UW) Since the first outer concrete wall 80A is provided with a thickness set in will form

In addition, the underground structure construction method of the present invention installs the column-type piles 10 and the intermediate piles 20, and repeats the unit inner wall construction step (S3) to construct the inner concrete wall (UW) to a set depth and After pouring discarded concrete 71 on the inner basement floor of the inner concrete wall (UW), constructing a waterproofing layer 72, and then pouring the floor concrete 73, the unit outer concrete wall (OW1) and the unit intermediate support (CW1) ) and the interfloor floor (S) is constructed, so it is simple to construct an underground structure having a plurality of internal spaces in the vertical direction while supporting the earth wall, thereby constructing the underground structure quickly and firmly. Also, the inner concrete wall (UW ), the inner concrete wall (UW) is supported without a separate support material such as an earth anchor to support it, so it occupies a small underground installation space in the ground, so that it can be installed freely even when buildings are adjacent to each other.

In addition, in the present invention, girders 91 are mounted on the unit outer concrete wall OW1 and the unit intermediate supports CW1, deck slabs 92 are mounted on the girders 91, and then the topping concrete 93 is installed. Since the interlayer support (S) is formed by pouring, the construction of the interlayer support (S) is easy and simple.

In addition, since the present invention does not require backfilling of the backside of the structure after installation of the underground structure is completed, the amount of underground excavated soil is small, so the economic efficiency is excellent. The occurrence of holes is excluded.

W; underground continuous wall 20; Intermediate file (20)
UW; inner concrete wall 70; floor body
S1; first interfloor 80A; 1st exterior concrete wall
C1; first intermediate support

Claims (5)

constructing an underground continuous wall by installing column-type piles to form a polygonal, closed curve, or two-row straight shape on the ground to construct the underground structure;
driving intermediate piles into the ground of the inner region of the underground continuous wall;
The ground excavation area surrounded by the column-type piles is excavated to a unit depth, and the concrete panels are arranged to form a polygonal or closed curve in the horizontal direction along the column-type piles so as to be in contact with the exposed column-type piles excavated to the unit depth. a unit inner wall construction step of constructing a unit inner concrete wall by installing steel beams to support the arranged concrete panels;
repeating the unit inner wall construction step a plurality of times to a set depth to construct an inner concrete wall;
pouring abandoned concrete on the inner basement floor of the inner concrete wall;
constructing a waterproofing layer on the inner concrete wall and the abandoned concrete;
pouring floor concrete on the waterproof layer of the discarded concrete;
Demolition of steel beams installed in the unit inner wall construction step adjacent to the floor concrete;
A first formwork is installed on the inner concrete wall to pour the unit outer concrete wall following the inner concrete wall of the area where the steel support beams have been removed, and the second formwork is installed in each of the intermediate piles to pour the unit intermediate support. and constructing a unit outer concrete wall and unit intermediate supports by pouring and curing each of the concrete into the first and second formwork;
Placing girders in the horizontal direction on top of the unit outer concrete wall and the unit intermediate supports, mounting the deck slabs on the girders in the horizontal direction, and constructing the interfloor floor by pouring the topping concrete on the deck slabs ;
Demolition of steel beams installed in the unit inner wall construction step adjacent to the interfloor floor;
A first formwork is installed on the inner concrete wall to pour the unit outer concrete wall following the inner concrete wall of the area where the steel support beams have been removed, and the second formwork is installed in each of the intermediate piles to pour the unit intermediate support. and constructing a unit outer concrete wall and unit intermediate supports by pouring and curing each of the concrete into the first and second formwork;
Placing girders in the horizontal direction on top of the unit outer concrete wall and the unit intermediate supports, mounting the deck slabs on the girders in the horizontal direction, and constructing the interfloor floor by pouring the topping concrete on the deck slabs including;
The second formwork includes two concrete half barrels forming a pair surrounding the intermediate pile, and a connecting unit for connecting and fixing the two concrete half barrels, and the two concrete half barrels are filled with concrete. An underground structure construction method using a brace, characterized in that the is poured. According to claim 1, wherein the concrete panel is supported on the underground continuous wall by a support means, the support means is inserted through a plurality of through-holes formed in the concrete panel, the through-holes of the concrete panel, the underground continuous A method of constructing an underground structure using braces, including anchor bolts or fixing pins embedded in the wall. According to claim 1, wherein the first formwork comprises a concrete panel for formwork arranged in a horizontal direction at a distance from the inner concrete wall, and a connecting unit for connecting the concrete panels for formwork to the inner concrete wall, respectively. Underground structure construction method using. According to claim 1, wherein the unit outer concrete wall comprises a protrusion protruding in the horizontal direction to the upper end one end of the girder is mounted, the unit intermediate support is protruding in the horizontal direction to the upper end one end of the girders A method of constructing an underground structure using a brace, including a protrusion on which is mounted. a continuous underground wall including a plurality of column-type piles that are embedded in the ground in the form of polygons, closed curves, or two straight lines to support the earth wall;
a plurality of intermediate piles embedded in the ground in the inner region of the underground continuous wall;
an inner concrete wall in which a plurality of concrete panels are arranged in horizontal and vertical directions along the continuous underground wall so as to be in contact with the underground continuous wall;
a floor body constructed on the inner basement floor of the inner concrete wall;
a first interfloor floor constructed at a height set in a vertical direction from the floor;
a first outer concrete wall constructed to a thickness set on an inner concrete wall located in a space between the floor and the first interfloor;
first intermediate supports respectively wrapped in concrete and constructed on intermediate piles positioned in the space between the floor and the first interfloor;
a second interfloor floor constructed at a height set in a vertical direction from the first interfloor;
a second outer concrete wall constructed to a thickness set on the inner concrete wall located in the space between the first and second interfloor floors;
Containing second intermediate supports respectively wrapped with concrete in the intermediate piles located in the space between the first and second interfloor floors,
The first and second interfloor floors each have a plurality of girders mounted in a horizontal direction between the outer concrete wall and intermediate supports, deck slabs mounted on the girders, and a topping placed on the deck slabs. Containing concrete,
The first and second intermediate supports each surround the intermediate pile and form a pair of two concrete half barrels, a connection unit for connecting and fixing the two concrete half barrels, and the inside of the two concrete half barrels An underground structure using braces, including filled concrete filled in.

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