KR20200088050A - Construction method for underground structure - Google Patents

Abstract

The present invention relates to a construction method of an underground structure and, more specifically, to a construction method of an underground structure capable of increasing the structural stability. According to the present invention, the construction method of an underground structure comprises: a wall member preparation step; a wall reinforcing bar placing step; a wall unit forming step; a lower wall reinforcing bar exposing step; a lower wall reinforcing bar coupling step; and a lower slab forming step.

Description

Construction method of underground structures{CONSTRUCTION METHOD FOR UNDERGROUND STRUCTURE}

The present invention relates to the construction technology field, and more particularly, to a construction method of an underground structure.

As a method of forming a wall in the ground and constructing a building structure based on it, the top-down method and the like are actively used.

It is first formed as a temporary facility by a CIP (cast in place pile) method, SCW (soil cement wall) method, etc., and adjacent to it, after forming a wall (plywood) seen by pouring concrete again. , It takes a method of constructing a building structure by forming pillars or bearing walls on this main wall.

That is, after drilling the ground along the excavation area, and reinforcing materials such as reinforcing bars and H piles are inserted into the hole, a concrete (cemented concrete or soil concrete) is poured to form a wall.

Also, after curing the reinforced concrete, it is most important to assemble the reinforcement in the field to reinforce the wall because it is most important to support the earth pressure by the earth wall until the strength is developed.

However, in the conventional underground wall construction method, it is difficult to secure a gap between the wall and the reinforcing bar, and there is a possibility that the reinforcing bar is released with time.

In addition, the stiffness is good in the longitudinal direction of the reinforcing bar, but it is difficult to secure the stiffness as it is constructed with each ball separately in the lateral direction, so there is a possibility that displacement occurs in the wall during excavation.

In addition, since the reinforcing effect by the transverse reinforcing bar is low, the strength of the permanent wall is also lowered, and there is a problem in that the order and the waterproofness are disadvantageous.

The existing technology requires a double construction of an underground wall (a retaining wall) and a main wall (a composite wall), and thus has a problem in that it takes a lot of economical cost and lengthens the construction period as it takes a lot of cross-section.

In order to solve this problem, a method of constructing an underground wall using a wall member having a square tube structure has been proposed as follows.

1 to 4 relates to Korean Patent Publication No. 10-2015-0039406 (construction method of an underground wall using a wall member).

Here, the wall member 100 includes a main body 110 having a rectangular box structure in which a tung portion is formed above and below; A plurality of partition walls 120 formed inside the body 110 so as to have a lattice structure; Includes; guide member 130 is installed on the inner surface of the partition wall 120, the guide member 130 is a pipe member 131 is formed so that the reinforcing bar 133 is inserted; It is characterized by a structure comprising a spacer member 132 which maintains mutual spacing by being coupled to the inner front of the tube member 131 and the partition wall 120 or the inner back of the tube member 131 and the partition wall 120 ( Fig. 1).

That is, in the previous underground wall construction method, it is difficult to secure a gap between the wall and the reinforcing bar, and there is a problem in that the reinforcing effect of the reinforcing bar wall is considerably deteriorated because there is a possibility that the reinforcing bar is detached. , In order to prevent this problem by permanently maintaining the distance between the inner surface of the partition wall 120 and the reinforcing bar 133 in the interior of the wall member 100 (Fig. 2).

Therefore, as the space between the partition wall 120 and the reinforcing bar 133 is permanently secured through the spacer 132, the reinforcing effect by the reinforcing bar 133 can be enhanced to maximize the strength of the wall, and displacement to the wall. It has the effect of preventing the possibility of occurrence.

In addition, by preventing the possibility of displacement in the wall, there is an advantage that it is possible to secure the water-repellent and waterproof properties of the wall.

In addition, after forming the finishing wall 400 on the front surface of the underground wall 200 formed by pouring concrete on the wall member 100, an integrated structure of the underground wall 200 and the finishing wall 400 is implemented to make the overall permanent. There is an advantage that it can be used as a wall (Fig. 3, 4).

5 to 9 relates to Korean Patent Publication No. 10-2015-0039407 (underground wall construction method using a wall member having excellent water and water resistance).

Here, the wall member 100 includes a main body 110 having a rectangular box structure in which a tung portion is formed above and below; A plurality of partition walls 120 formed inside the body 110 so as to have a lattice structure; A locking portion 140 formed on one side of the main body 110 so as to be able to engage the sliding member 150a of the adjacent wall member 100a and slide up and down; It is characterized by a structure comprising a; binding member 150 formed on the other side of the main body 110 so as to be able to engage the sliding member 140b of the other adjacent wall member 100b in the vertical direction (FIG. 5).

That is, in the previous underground wall construction method, when joining the wall, there is a possibility that the joint of the wall connection is poor, and this may cause displacement to deteriorate the water resistance, waterproofness, and strength of the wall. And by connecting the connection portion of the wall through the binding portion 150 to be made solid, it is possible to obtain an effect of improving the water resistance, water resistance and strength, as well as securing stability when the wall is near.

The locking portion 140 and the binding portion 150 are simple through the slide fitting in the up and down direction, but the bonding is securely maintained, so the operation is easy, and there is an advantage that structural stability can be secured.

In addition, as in the prior art, since there is no need to reinforce the longitudinal displacement by separately inserting the wedge pile, it is possible to reduce the economic cost and obtain the effect of easy construction.

In addition, the wall member 100 is characterized in that it is possible to secure the gap between the partition wall 120 and the reinforcing bar 133 through a structure in which the guide member 130 is installed on the inner surface of the partition wall 120 (FIG. 9). .

10 to 14 relates to Korean Patent Publication No. 10-2015-0039408 (a wall member for preventing the inflow of grout or slime into the pipe, and an underground wall using the same and a construction method thereof).

Here, the wall member 100 includes a main body 110 having a rectangular box structure in which a tung portion is formed above and below; A plurality of partition walls 120 formed inside the body 110 so as to have a lattice structure; In addition to being installed inside the main body 110, the upper and lower divisions to prevent the grout or slime from flowing into the upper portion prevent the inflow member 140; characterized in that the structure comprises a.

That is, in the previous underground wall construction method, since the grout, slime, etc. in the vicinity (2) region of the perforated hole flows into the pipe when the wall is approached, the reinforcing bar network in the underground wall may be injured or deterioration of the wall concrete may occur. However, in the prior art, in order to fundamentally prevent such a problem, a structure is proposed to prevent slime in the near-entrance (2) region from entering the tube.

In other words, by installing the inflow prevention member 140 in the interior of the wall member 100 so as to be disposed in the vicinity of the perforated hole, the grout or slime at the bottom of the member 140 is blocked from entering the upper portion and shared. , It prevents the problem of the slime inflow into the tube of the wall member 100 by default (Fig. 10, 11, 12).

Through this, the concrete quality and strength of the underground wall 200 formed by pouring concrete inside the wall member 100 can be secured, and when the wall member 100 is approached, the inside of the member is separately cleaned to grout or Since the hassle of removing the slime can be reduced, there is an advantage in terms of workability and economy.

In addition, the wall member 100 is characterized in that the gap between the partition wall 120 and the reinforcing bar 133 can be secured through a structure in which the guide member 130 is installed on the inner surface of the partition wall 120 (FIG. 13, 14).

On the other hand, in the case of the construction method of the underground structure by the wall member as described above, for structural stability of the underground structure, a solid coupling (joint) of the reinforcing bar reinforced to the wall member and the slab reinforcing bar constructed by the field casting method is required. There has been no specific construction method for this, so it has been pointed out as a problem.

The reference numerals of the above prior art are to be limited only to the description of the prior art.

1. Korea Patent Publication No. 10-2015-0039406 2. Korean Patent Publication No. 10-2015-0039407 3. Korean Patent Publication No. 10-2015-0039408

The present invention has been derived to solve the above problems, and a construction method of an underground structure to increase structural stability by a solid combination of a reinforcing bar reinforced to a wall member and a slab reinforcing bar constructed by a field casting method. The purpose is to present.

In order to solve the above problems, the present invention is provided with a wall portion (a) and a plurality of slabs (b) so that a hollow is formed therein, and as a construction method of an underground structure buried in the ground, the box structure by a steel plate. Wall member preparation step of preparing the wall member 100 is formed, the lower exposed portion 110 for exposing the lower wall reinforcement 130 is formed; A wall reinforcing bar for reinforcing the inner wall reinforcing bar 120 and the lower wall reinforcing bar 130 in the interior of the wall member 100 so that the lower wall reinforcing bar 130 is exposed through the lower exposed part 110. Back muscle stage; Excavating the ground, buriing the wall member 100, and pouring concrete into the wall member 100 to form the wall part (a); Excavating the ground of the inner region of the wall portion (a) so that the hollow is formed, so that the lower wall reinforcement 130 is exposed; The lower slab reinforcing bar 300 for installation of the lower slab b1 among the plurality of slabs (b) is reinforced, but the lower wall reinforcing bar 130 coupling the lower slab reinforcing bar 300 and the lower wall reinforcing bar 130 ) Bonding step; The lower slab (300) and lower wall reinforcing bar (130) is poured into concrete to be buried, forming a lower slab (b1) to form the lower slab (b1); Construction of the underground structure comprising a How to do it.

The lower wall reinforcement 130 includes: a lower wall reinforcement joint 130a coupled to the inner wall reinforcement 120 reinforced inside the wall member 100; Including the lower wall reinforcement extension portion (130b) formed to be bent or curved to be inclined downward toward the inside from the lower wall reinforcement (130a), the lower end is exposed through the lower exposed portion (110); It is preferred.

The inner wall reinforcing bar 120, an outer inner wall reinforcing bar 121 installed along the vertical direction on the outside of the inside of the wall member 100; Including the inner inner wall reinforcement (122) installed along the vertical direction in the inside of the interior of the wall member 100; including, the lower wall reinforcement joint (130a) of the lower wall reinforcement 130 is the outer inner wall reinforcement It is preferable to bind to (121).

The lower slab reinforcement 300 includes an upper lower slab reinforcement 310 disposed on an upper side of the lower slab b1; A lower lower slab rebar 320 disposed under the lower slab b1; Including the lower slab oblique reinforcement 330, one end of which is coupled to the lower lower slab reinforcement 320 and the other end is inclined upward toward the outside, wherein the lower wall reinforcement 130 extends the lower wall reinforcement The portion 130b is formed in a curved structure, and a curved lower wall reinforcement 131 coupled to an end of the lower lower slab reinforcement 320; It is preferable that the lower wall reinforcing bar extension portion 130b is formed in a straight structure, and a straight lower wall reinforcing bar 132 coupled to an end of the lower slab oblique reinforcement 330.

The lower slab oblique reinforcement 330 may include: an upper lower slab oblique reinforcement 331 disposed such that the other end is positioned above the lower slab b1; The other end is disposed to be located in the center of the lower slab (b1), the central lower slab diagonal bar 332; includes, the straight lower wall rebar 132, coupled to the upper lower slab diagonal bar 331 Upper straight lower wall reinforcement 132A; It is preferable to include; a center-side straight lower wall rebar (132B) coupled to the center-side lower slab diagonal bar (332).

It is preferable that the lower exposed portion 110 includes a plurality of lower exposed holes 111 formed under the inner surface of the wall member 100.

A lower opening portion 112 and a lower cover portion 113 of a structure that can be opened and closed to facilitate reinforcing bar reinforcement work are formed below the inner surface of the wall member 100, and the lower cover portion 113 has the plurality of lower portions. An exposed hole 111 is formed, and the step of reinforcing the wall reinforcement comprises: coupling the reinforcing bar inside the lower wall reinforcing bar 130 and the wall member 100 through the lower opening part 112; It is preferable to include; closing the lower opening portion 112 by the lower cover portion 113, so that the end of the lower wall reinforcement 130 is located in the lower exposure hole 111.

The wall member preparation step includes forming a central exposed part 150 for exposing the central wall reinforcement 140 to the wall member 100, wherein the wall reinforcement step includes: the wall member Reinforcing the reinforcing bar in the interior of (100), so that the central wall reinforcement 140 is exposed through the central exposed portion 150; including, of the plurality of slabs (b) of the central slab (b2) A central wall reinforcement (140) coupling step of reinforcing the central slab reinforcement (400) for installation, and combining the central slab reinforcement (400) and the central wall reinforcement (140); It is preferable that the center slab (b2) forming step of forming the center slab (b2) by pouring concrete such that the center slab reinforcement (400) and the center wall reinforcement (140) are buried.

The central wall reinforcement 140 includes a central wall reinforcement joint 140a coupled to the inner wall reinforcement 120 reinforced inside the wall member 100; The central wall reinforcement joint 140a is formed to be bent or curved to be inclined upward toward the inner side, and a central wall reinforcement extension 140b having an upper end exposed through the central exposed portion 150 is included. It is preferred.

The inner wall reinforcing bar 120, an outer inner wall reinforcing bar 121 installed along the vertical direction on the outside of the inside of the wall member 100; Including the inside of the wall member 100, the inner inner wall reinforcing bar 122 installed along the vertical direction in the inside; including, the central wall reinforcing member 140a of the central wall reinforcing bar 140 is the outer inner wall reinforcing bar It is preferable to bind to (121).

The central slab reinforcement 400, the upper central slab reinforcement 410 disposed on the upper side of the central slab (b2); A lower central slab reinforcement 420 disposed at a lower side of the central slab b2; Includes; the central slab oblique reinforcement 430, one end of which is coupled to the upper central slab reinforcement 410 and the other end is inclined downward toward the outside; the central wall reinforcement 140 extends the central wall reinforcement The portion 140b is formed in a curved structure, and a curved central wall reinforcement 141 coupled to an end of the upper central slab reinforcement 410; It is preferable that the central wall reinforcement portion 140b is formed in a straight structure, and a straight central wall reinforcement 142 coupled to an end of the central slab oblique reinforcement 430.

It is preferable that the central portion exposed portion 150 includes a plurality of central portion exposed holes 151 formed in the central portion of the inner surface of the wall member 100.

In the central portion of the inner surface of the wall member 100, a central portion opening portion 152 and a central portion cover portion 153 having a structure that can be opened and closed to facilitate rebar reinforcement work are formed, and the central portion portion 153 includes the plurality of central portions. An exposed hole 151 is formed, and the wall reinforcing step comprises: combining the reinforcing bar inside the central wall reinforcing bar 140 and the wall member 100 through the central opening part 152; It is preferable to include the step of closing the central opening portion 152 by the central cover portion 153, so that an end of the central wall reinforcement 140 is located in the central exposure hole 151.

The present invention proposes a construction method of an underground structure that can increase structural stability by a solid combination of a reinforcing bar reinforced to a wall member and a slab reinforcing bar constructed by a field placing method.

1 to 14 show the prior art,
1 to 4 are views of Korean Patent Publication No. 10-2015-0039406.
5 to 9 are views of Korean Patent Publication No. 10-2015-0039407.
10 to 14 are views of Korean Patent Publication No. 10-2015-0039408.
15 or less shows an embodiment of the present invention,
15 is a cross-sectional view of the underground structure.
16 to 20 are process drawings of a first embodiment of the construction method of the underground structure.
21 to 24 are process drawings of a second embodiment of the construction method of the underground structure.
25 is a process diagram of a third embodiment of the construction method of the underground structure.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figure 15 or less, the present invention relates to a construction method of an underground structure having a wall portion (a), a plurality of slabs (b), and buried in the ground so that a hollow is formed therein, as follows It is made by the same process.

It is formed of a box structure by a steel plate, and prepares a wall member 100 having a lower exposed portion 110 for exposing the lower wall reinforcement 130.

Reinforcing the inner wall reinforcing bar 120 and the lower wall reinforcing bar 130 inside the wall member 100, but reinforcing so that the lower wall reinforcing bar 130 is exposed through the lower exposed portion 110 (exposure hole 111). (Fig. 16, 17).

Since the lower exposed portion 110 is temporarily buried during the construction of the wall portion a, it must be exposed again after an excavation operation for forming a slab, so it is necessary to temporarily close it by a temporary protective member such as styrofoam.

The ground is excavated, the wall member 100 is buried, and concrete is poured into the wall member 100 to form a wall part (a).

To form a hollow, the ground of the inner region of the wall portion (a) is excavated so that the ends of the lower exposed portion 110 and the lower wall reinforcement 130 are exposed.

The lower slab reinforcing bar 300 for installation of the lower slab b1 among the plurality of slabs (b) is reinforced, but the lower slab reinforcing bar 300 and the lower wall reinforcing bar 130 exposed as above by a coupler (c) or the like. Combine (FIG. 18).

Concrete is poured so that the lower slab reinforcement 300 and the lower wall reinforcement 130 are buried, thereby forming the lower slab b1.

That is, on the premise of a method of forming a wall part using the wall member 100, the lower exposed part 110 is formed on the wall member 100, and the lower wall reinforcement 130 is exposed through the lower slab. By being able to easily and stably combine the reinforcing bar 300, there is an effect that the structural stability of the underground structure can be increased.

The slab (b) of the underground structure can be divided into a lower slab (b1) forming the bottom of the bottom layer, a central slab (b2) forming the basement and the ceiling of the basement layer at the same time, and an upper slab (b3) forming the ceiling. Each case will be explained separately.

First, the lower slab b1 and the bonding process will be described.

The lower wall reinforcing bar 130 is specifically, a lower wall reinforcing bar joint 130a coupled (overlapping) to the inner wall reinforcing bar 120 reinforced inside the wall member 100; It is configured to include a lower wall reinforcing bar extending portion 130b formed to be bent or curved to be inclined downward toward the inside from the lower wall reinforcing bar joint 130a, and having a lower end exposed through the lower exposed portion 110. (FIG. 19, 20).

The inner wall reinforcing bar 120 includes: an outer inner wall reinforcing bar 121 installed along the vertical direction on the outside of the inside of the wall member 100; The inside of the wall member 100, the inner inner wall reinforcement 122 installed along the vertical direction in the inside; is configured to include.

The lower wall reinforcement joint 130a of the upper lower wall reinforcement 130 is preferably coupled to the outer inner wall reinforcement 121 rather than the inner inner wall reinforcement 122 for structural stability of the right corner.

The lower slab reinforcement 300 includes an upper lower slab reinforcement 310 disposed on an upper side of the lower slab b1; A lower lower slab reinforcement 320 disposed under the lower slab b1; One end is coupled to the lower lower slab reinforcement (320), the other end is arranged to be inclined upward toward the outside, the lower slab oblique reinforcement (330); is configured to include.

The lower wall reinforcing bar 130, the lower wall reinforcing bar extension portion (130b) is formed in a curved structure, and the lower lower slab reinforcing bar 320 coupled to the end of the curved lower wall reinforcing bar (131); The lower wall reinforcing bar extension portion 130b is formed in a straight structure, and the straight lower wall reinforcing bar 132 coupled to the end of the lower slab oblique reinforcement 330; is configured to include.

As such, it is preferable for the structural stability of the right angle portion that the lower lower slab reinforcement 320 of the lower slab reinforcement 300 and the lower slab diagonal reinforcement 330 coupled thereto and the upper lower wall reinforcement 130 be combined.

In addition, as described above, when the combined structure of the curved lower wall reinforcement 131 and the lower lower slab reinforcement 320 and the straight lower wall reinforcement 132 and the lower slab oblique reinforcement 330 are combined and applied, The effect is to prevent stress concentration as much as possible by sufficiently reinforcing the dangerous section.

The lower slab oblique reinforcement 330 includes: an upper lower slab oblique reinforcement 331 arranged such that the other end is positioned above the lower slab b1; It is preferable that the other end is installed in plural, including; a central-side lower slab oblique reinforcing bar 332 disposed to be located at the center of the lower slab b1.

In this case, the straight lower wall rebar 132 includes: an upper straight lower wall rebar 132A coupled to the upper lower slab diagonal bar 331; It is installed in a plurality of, including a central-side linear lower wall reinforcement (132B) coupled to the central-side lower slab diagonal reinforcement (332), each to be coupled to the plurality of lower slab diagonal reinforcement (330) structural stability of the right corner portion Is preferred.

That is, since the area where the maximum bending moment occurs in the underground structure is a coupling portion (right corner) of the wall and the lower slab, it is desirable for structural stability and efficiency to reinforce this portion as above.

The lower exposed portion 110 to which the end portion of the lower wall reinforcing bar 130 is exposed is basically configured to include a plurality of lower exposed holes 111 formed on the lower inner surface of the wall member 100.

In the interior of the wall member 100, the inner wall reinforcing bar 120 and the lower wall reinforcing bar 130 should be combined. In order to facilitate such reinforcing bar reinforcement work, it can be opened and closed under the inner surface of the wall member 100. It is preferable that the lower opening portion 112 and the lower cover portion 113 of the structure are formed (FIGS. 16 and 17 ).

That is, the lower opening part 112 of the wide area is formed, and through this, the lower wall reinforcing bar 130 and the inner wall reinforcing bar 120 inside the wall member 100 are combined, and it is embedded in the ground. If it is, the lower opening portion 112 is entirely closed by concrete and soil, which makes it difficult to expose the lower wall reinforcing bar 130 later.

Therefore, the lower opening portion 112 is closed by welding or the like of the lower cover portion 113, so that a plurality of lower exposure holes 111 are formed in the lower cover portion 113, and end portions of the lower wall reinforcing bar 130 are formed. It is preferable to be located in the lower exposure hole (111).

Second, the center slab b2 and the bonding process will be described.

To this end, the wall member 100 is formed with a central exposed portion 150 for exposing the central wall reinforcement 140.

Reinforcing the reinforcing bar inside the wall member 100, so that the central wall reinforcing bar 140 is exposed through the central exposed portion 150, and the central slab for installation of the central slab b2 among the plurality of slabs b After reinforcing the reinforcing bar 400, after combining the central slab reinforcing bar 400 and the central wall reinforcing bar 140, the concrete is poured so that the central slab reinforcing bar 400 and the central wall reinforcing bar 140 are buried, and the central slab (b2) ).

The central wall reinforcement 140 is specifically, a central wall reinforcement joint 140a coupled to the inner wall reinforcement 120 reinforced inside the wall member 100; It is configured to include a central wall reinforcement extension portion 140b formed to be bent or curved to be inclined upwardly toward the inside from the central wall reinforcement joint 140a, and to have the top exposed through the central exposed portion 150. (FIG. 23, 24).

As described above, the inner wall reinforcement 120 includes: an outer inner wall reinforcement 121 installed along the vertical direction on the outside of the inside of the wall member 100; The inside of the wall member 100, the inner inner wall reinforcement 122 installed along the vertical direction in the inside; is configured to include.

The central wall reinforcement joint 140a of the upper central wall reinforcement 140 is preferably coupled to the outer inner wall reinforcement 121 rather than the inner inner wall reinforcement 122 for structural stability of the right angle.

The central slab reinforcement 400 includes: an upper central slab reinforcement 410 disposed on an upper side of the central slab b2; A lower central slab reinforcement 420 disposed below the central slab b2; One end is coupled to the upper central slab reinforcing bar 410, the other end is arranged to be inclined downward toward the outside, the central slab oblique rebar 430; is configured to include.

The central wall reinforcement 140 includes a central wall reinforcement extension 140b formed in a curved structure, and a curved central wall reinforcement 141 coupled to an end of the upper central slab reinforcement 410; The central wall reinforcement portion 140b is formed in a straight structure, and the central central wall reinforcement 142 coupled to the end portion of the central slab oblique reinforcement 430; is configured to include.

As such, it is preferable for the structural stability of the right angle portion that the upper central slab reinforcement 410 of the central central slab reinforcement 400 and the central slab diagonal reinforcement 430 coupled thereto and the upper central wall reinforcement 140 be combined.

In addition, as described above, when the combined structure of the curved central wall reinforcement 141 and the upper central slab reinforcement 410 and the straight central wall reinforcement 142 and the central slab oblique reinforcement 430 are combined and applied, The effect is to prevent stress concentration as much as possible by sufficiently reinforcing the dangerous section.

On the other hand, the coupling structure of the above-described lower slab rebar 300-lower wall reinforcing bar 130 and the central slab reinforcing bar 400-central wall reinforcing bar 140 have opposite structures (inclined direction of diagonal rebar, It takes the inclined direction of the extension part of the lower and central wall reinforcement, the coupling structure with the upper and lower slab reinforcement, etc., because the direction of the bending moment caused by the self-weight and earth pressure of the underground structure is opposite to each other in the upper 2 parts. to be.

The central exposed portion 150 where the end portion of the central wall reinforcement 140 is exposed is basically composed of a plurality of central exposed holes 151 formed in the central portion of the inner surface of the wall member 100.

As in the case of the above-described lower exposed portion 110, in the case of the central exposed portion 150, it is preferable to take the following configuration for ease of reinforcing bars.

That is, the central portion opening portion 152 and the central portion cover portion 153 of a structure that can be opened and closed to facilitate the reinforcing bar reinforcement work are formed in the central portion of the inner surface of the wall member 100, and the central portion portion 153 exposes a plurality of central portions. It is preferable that the ball 151 is formed.

Through the central opening part 152, the central wall reinforcement 140 and the reinforcing bar inside the wall member 100 are combined, and the central opening part 153 is closed by the central cover part 153, but the central wall reinforcement It is preferable that the end of 140 is located in the central exposed hole 151.

Third, the upper slab b3 and the bonding process will be described.

In the case of the upper slab reinforcement 500 reinforced to the upper slab b3, the upper upper slab reinforcement 510, the lower upper slab reinforcement 520, and the upper slab diagonal reinforcement 530 are configured.

When pouring concrete for the formation of the wall portion (a), concrete is poured only up to a certain area (d) so that the inner wall reinforcement 120 is exposed, and the upper and upper slab reinforcement of the exposed inner wall reinforcement 120 After combining (500), concrete for the upper region of the wall portion (a) and the entire region of the upper slab (b3) is integrally formed to form an integral structure.

The above is merely a description of some of the preferred embodiments that can be implemented by the present invention, and as is well known, the scope of the present invention should not be construed as being limited to the above embodiments, and the present invention described above. It will be said that both the technical idea and the technical idea together with the fundamental are included in the scope of the present invention.

a: wall part b: slab
b1: lower slab b2: central slab
b3: upper slab 100: wall member
110: lower exposed portion 111: lower exposure hole
112: lower opening portion 113: lower cover portion
120: inner wall reinforcement 121: outer inner wall reinforcement
122: inner inner wall reinforcement 130: lower wall reinforcement
130a: lower wall rebar joint 130b: lower wall rebar extension
131: curved lower wall reinforcement 132: lower wall reinforcement
132A: upper straight lower wall rebar 132B: central straight lower wall rebar
140: central wall reinforcement 140a: central wall reinforcement
140b: Center wall reinforcement extension 141: Curved center wall reinforcement
142: straight center wall reinforcement 150: center exposed
151: central exposure hole 152: central opening
153: central cover 300: lower slab reinforcement
310: upper lower slab reinforcement 320: lower lower slab reinforcement
330: lower slab oblique reinforcement 331: upper lower slab oblique reinforcement
332: central lower slab oblique reinforcement 400: central slab reinforcement
410: upper central slab reinforcement 420: lower central slab reinforcement
430: Central slab diagonal bar

Claims (13)

As a construction method of the underground structure having a wall portion (a) and a plurality of slabs (b) to form a hollow therein, and embedded in the ground,
A wall member preparation step of preparing a wall member 100 formed of a box structure made of a steel sheet and having a lower exposed portion 110 for exposing the lower wall reinforcement 130;
A wall reinforcing bar for reinforcing the inner wall reinforcing bar 120 and the lower wall reinforcing bar 130 in the interior of the wall member 100 so that the lower wall reinforcing bar 130 is exposed through the lower exposed part 110. Back muscle stage;
Excavating the ground, buriing the wall member 100, and pouring concrete into the wall member 100 to form the wall part (a);
Excavating the ground of the inner region of the wall portion (a) so that the hollow is formed, so that the lower wall reinforcement 130 is exposed;
The lower slab reinforcing bar 300 for installation of the lower slab b1 among the plurality of slabs (b), but lower wall reinforcing bar 130 coupling the lower slab reinforcing bar 300 and the lower wall reinforcing bar 130 ) Bonding step;
Forming a lower slab (b1) by pouring concrete such that the lower slab reinforcement (300) and lower wall reinforcement (130) are buried;
Construction method of the underground structure comprising a. According to claim 1,
The lower wall reinforcing bar 130,
A lower wall reinforcement joint 130a coupled to the inner wall reinforcement 120 reinforced inside the wall member 100;
The lower wall reinforcement part 130a is formed to be bent or curved to be inclined downward toward the inside, and the lower wall reinforcement extension part 130b formed so that the lower end is exposed through the lower exposed part 110;
Construction method of the underground structure comprising a. According to claim 2,
The inner wall reinforcement 120,
Outer inner wall reinforcement 121 installed along the vertical direction on the outside of the inside of the wall member 100;
The inside of the wall member 100, the inner inner wall reinforcement 122 installed along the vertical direction in the inside; includes,
The lower wall reinforcement joint (130a) of the lower wall reinforcement (130) is a construction method of the underground structure, characterized in that coupled to the outer inner wall reinforcement (121). According to claim 3,
The lower slab reinforcement 300,
An upper lower slab rebar 310 disposed on an upper side of the lower slab b1;
A lower lower slab rebar 320 disposed under the lower slab b1;
Includes; one end is coupled to the lower lower slab reinforcement (320), the other end of the lower slab oblique reinforcement 330 is disposed to be inclined upward toward the outside;
The lower wall reinforcing bar 130,
The lower wall reinforcement 130b is formed in a curved structure, and a curved lower wall reinforcement 131 coupled to an end of the lower lower slab reinforcement 320;
The lower wall reinforcing bar extension portion 130b is formed in a straight structure, and a straight lower wall reinforcing bar 132 coupled to the end of the lower slab diagonal bar 330;
Construction method of the underground structure comprising a. According to claim 4,
The lower slab diagonal bar 330,
An upper lower slab diagonal bar 331 disposed so that the other end is positioned above the lower slab b1;
Includes; the other end of the lower slab oblique reinforcement 332 is arranged to be located in the center of the lower slab (b1),
The straight lower wall reinforcement 132,
An upper straight lower wall reinforcement bar 132A coupled to the upper lower slab diagonal bar 331;
Construction method of the underground structure, characterized in that it comprises; a central-side straight lower wall reinforcement (132B) coupled to the central-side lower slab oblique reinforcement (332). According to claim 1,
The lower exposed portion 110 is a construction method of the underground structure, characterized in that it comprises a plurality of lower exposed holes 111 formed on the lower inner surface of the wall member (100). The method of claim 6,
The lower opening portion 112 and the lower cover portion 113 of a structure that can be opened and closed to facilitate rebar reinforcement work are formed under the inner surface of the wall member 100,
The lower cover portion 113 is formed with a plurality of lower exposure holes 111,
The wall reinforcement step,
Combining the lower wall reinforcing bar 130 and the reinforcing bar inside the wall member 100 through the lower opening part 112;
Closing the lower opening portion 112 by the lower cover portion 113, so that an end of the lower wall reinforcement 130 is located in the lower exposure hole 111;
Construction method of the underground structure comprising a. According to claim 1,
The wall member preparation step,
Includes; forming a central exposed portion 150 for exposing the central wall reinforcement 140 with respect to the wall member 100;
The wall reinforcement step,
Reinforcing the reinforcing bar inside the wall member 100, so that the central wall reinforcing bar 140 is exposed through the central exposed portion 150; includes,
The central slab reinforcement 400 for the installation of the central slab (b2) among the plurality of slabs (b) is reinforced, but the central wall reinforcement (140) coupling the central slab reinforcement (400) and the central wall reinforcement (140) ) Bonding step;
Forming a central slab (b2) by pouring concrete such that the central slab reinforcement (400) and the central wall reinforcement (140) are buried, forming the central slab (b2);
Construction method of the underground structure, characterized in that it further comprises. The method of claim 8,
The central wall reinforcement 140,
A central wall reinforcement joint 140a coupled to the inner wall reinforcement 120 reinforced inside the wall member 100;
The central wall reinforcement portion 140a is formed to be bent or curved to be inclined upward toward the inside, and a central wall reinforcement extension portion 140b having an upper end exposed through the central exposed portion 150;
Construction method of the underground structure comprising a. The method of claim 9,
The inner wall reinforcement 120,
Outer inner wall reinforcement 121 installed along the vertical direction on the outside of the inside of the wall member 100;
The inside of the wall member 100, the inner inner wall reinforcement 122 installed along the vertical direction in the inside; includes,
Construction method of the underground structure, characterized in that the central wall reinforcement (140a) of the central wall reinforcement (140) is coupled to the outer inner wall reinforcement (121). The method of claim 10,
The central slab reinforcement 400,
An upper central slab reinforcement 410 disposed on an upper side of the central slab b2;
A lower central slab reinforcement 420 disposed at a lower side of the central slab b2;
Includes; one end is coupled to the upper central slab reinforcement (410), the other end is disposed to be inclined downward toward the outside, the central slab oblique reinforcement (430);
The central wall reinforcement 140,
The central wall reinforcement portion 140b is formed in a curved structure, and a curved central wall reinforcement 141 coupled to an end of the upper central slab reinforcement 410;
The central wall reinforcement portion 140b is formed in a straight structure, and the central central wall reinforcement 142 coupled to the end portion of the central slab oblique reinforcement 430;
Construction method of the underground structure comprising a. The method of claim 8,
The central portion exposed portion 150 includes a plurality of central portion exposed hole 151 formed in the central portion of the inner surface of the wall member 100, the construction method of the underground structure. The method of claim 12,
In the central portion of the inner surface of the wall member 100, a central portion opening portion 152 and a central portion cover portion 153 having a structure that can be opened and closed to facilitate rebar reinforcement work are formed,
The plurality of central exposure holes 151 are formed in the central cover portion 153,
The wall reinforcement step,
Combining the reinforcing bar inside the central wall reinforcing bar 140 and the wall member 100 through the central opening part 152;
Closing the central opening portion 152 by the central cover portion 153, so that an end of the central wall reinforcement 140 is located in the central exposure hole 151;
Construction method of the underground structure comprising a.

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