KR20200114553A - Underground structure with top-down construction method using underground column wall and construction method therefor - Google Patents

Abstract

Disclosed are an underground structure manufactured in a top-town method using a column type wall and a construction method thereof, which can construct the column type wall sufficiently securing water-proof performance even when steel pipes are constructed to be spaced apart from each other by using a steel water-stop plate, construct an upper plate structure, both wall structures, and a lower plate structure in the top-down method after excavating the inside of both column type walls, and construct the box-shaped underground structure.

Description

An underground structure manufactured in a top-down method using a main heat type wall and its construction method {UNDERGROUND STRUCTURE WITH TOP-DOWN CONSTRUCTION METHOD USING UNDERGROUND COLUMN WALL AND CONSTRUCTION METHOD THEREFOR}

The present invention relates to an underground structure manufactured in a top-down manner using a main heat type wall and a construction method thereof. More specifically, construct a main column wall that can sufficiently secure water-repelling performance even when the steel pipes are spaced apart using a steel index plate, and after excavating the inside of both main column walls, the upper plate structure, both wall structures and the lower plate structure are topped. The present invention relates to an underground structure manufactured in a top-down manner using a main column wall that constructs a box-shaped underground structure by using a down method and a construction method thereof.

Figure 1a is a construction view of a conventional main heating wall.

That is, it can be seen that the side surfaces of the steel pipe piles overlap each other to be connected to the excavation space formed by trench excavation of the ground, and after inserting a reinforcing bar assembly or a steel frame member inside, concrete is filled inside the steel pipe pile.

Therefore, since steel pipes and steel pipes are overlapped with each other, the ordering performance can be sufficiently secured, while steel pipes have to be processed, and there are many overlapping areas, so there will be a loss of steel pipes as much as the overlapping parts when connecting multiple steel pipes. There is a limit that economic feasibility is inevitably lowered.

Figure 1b is a construction diagram of another conventional main heating wall.

That is, the steel pipes 10 are not constructed so as to overlap each other, but the steel pipes are spaced apart from each other, but a connecting steel 20 is additionally formed on the outer circumferential surface of the steel pipes, and the connecting steels are meshed with each other so that the steel pipes will be connected to each other in spaced construction I made it possible.

Unlike FIG. 1A, this method is economical because it is possible to reduce the number of steel pipes installed because the steel pipes are not overlapped, and how to secure the order performance of the part where the connecting steel 20 is installed becomes important.

Accordingly, as shown in FIG. 1B, it can be seen that the steel pipe and the steel pipe are using various types of connecting steel 20 to facilitate connection, and the part (connection part) where the connecting steel is connected to each other is finished with a filler to secure water-repellent performance. It can be seen that it is used as (C).

As a result, it can be seen that the conventional main-heated wall is constructed on the ground so that the steel pipes are spaced apart from each other, but the water-repelling performance is secured by constructing the main-heated wall using connecting steel and fillers, but it is difficult to secure water-repellent performance unless the construction quality is secured. There was this.

Republic of Korea Patent Laid-Open Patent No. 10-1662091 (Name of the invention: a barrier wall manufactured using an inner barrier material and a structure construction method using the same, publication date: October 5, 2016) Republic of Korea Patent Publication No. 10-2015-0051101 (Name of the invention: steel pipe for the water wall, publication date: May 11, 2015)

Accordingly, the present invention is a steel material that can be constructed by first constructing a main heat-type wall that can sufficiently secure water-repelling performance even when the steel pipes are spaced apart from each other, and then quickly construct a box-type underground structure inside the main heat-type wall in a top-down method. It is a technical task to solve the provision of an underground wall manufactured using a water-stop plate and an underground structure construction method using the same.

In order to achieve the above task, an underground hardened material manufactured using the main column wall of the present invention and a top-down type underground structure construction method using the same are both column type walls formed by connecting and installing steel pipes in a longitudinal direction using a guide tube. ; And a top plate structure formed to be integrated with both main column walls by pouring top plate concrete on the precast top plate mounted between the two main column walls using a space formed by excavating the ground from the ground surface between the two main column walls. Including; a lower plate structure formed between the two main column walls by excavating the lower part of the upper plate structure; and both side walls formed by side wall concrete formed on both exposed main column walls between the upper plate structure and the lower plate structure; and an underground structure including; Is done.

The main column wall of the invention is capable of securing the ordering performance between the steel pipes by using a steel index plate, and the precast superstructure is first quickly constructed by excavating between the main column walls, and then the excavation space is restored to enable the operation of vehicles, etc. Therefore, it is possible to provide an underground wall manufactured using a steel index plate and a method for constructing an underground structure using the same, which can secure constructability and safety according to the construction of the underground structure.

The upper part of the underground structure of the present invention is constructed by a precast method so that vehicle traffic can be quickly restored, and it is constructed in a stationary manner using a steel pipe support between the main column walls, and the excavation space above the upper plate structure is It is possible to provide an underground wall manufactured using a steel index plate that enables more efficient underground structure construction and a method for constructing an underground structure using the same because it is restored to enable immediate vehicle passage.

In the underground structure of the present invention, the lower plate structure is constructed in a field-cast concrete method, but a waterproof sheet is installed so as not to be damaged by leakage from the lower part to prevent leakage to the lower plate structure, and both side wall structures are finished. It enables rapid construction using panels.

Third, if the lateral spacing of the main column wall becomes longer, an intermediate main column wall should be additionally constructed, but the steel pipe of the main column wall located above the upper plate structure is not sacrificed, and the recovery is possible by separating it. It is possible to provide an underground wall manufactured using this possible steel index plate and a method for constructing an underground structure using the same.

1A and 1B are construction views of a conventional main heat type wall,
Figure 2 is a construction view of an underground structure manufactured using the main column wall of the present invention,
3A, 3B and 3C are detailed configuration diagrams of an underground structure manufactured using the main column wall of the present invention,
4A and 4B are a flow chart of a top-down method of constructing an underground structure using an underground hardening material manufactured using the main column wall of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless otherwise stated.

[Underground structure (300) manufactured in a top-down manner using main heat type walls]

Figure 2 shows a construction diagram of an underground structure 300 manufactured in a top-down manner using the main column wall 100 of the present invention.

As shown in FIG. 2, the underground structure 300 is constructed by connecting the steel pipes in the longitudinal direction using a guide pipe 120 so as to sufficiently secure the ordering performance, thereby separating the two main column walls 100 in the transverse direction from each other. It is possible to construct both side walls 310 of the underground structure 300 by performing construction, and the inner wall of the underground structure 300 by installing the intermediate wall 200 in the outline of the both main column walls 100 330) is to be constructed, and the upper structure of the upper plate structure 320 is constructed so that vehicle passage is possible, and a top-down method is used to construct the lower plate structure 340 under the upper plate structure 320. It is constructed.

Looking specifically at this, it can be seen that the underground structure 300 includes a main column wall 100, an intermediate wall 200, and an underground structure 300, as shown in FIG. 2.

First, the main column wall 100 is constructed by spaced apart the steel pipes 110 in the longitudinal direction using the guide pipes 120, thereby preventing the loss of steel pipes caused by overlapping steel pipes and securing order performance between adjacent steel pipes. I made it possible to do it.

Accordingly, the main column wall 100 is a steel pipe 110, a guide pipe 120, a stud 130, a steel pipe connection plate 140, a steel pipe bracket 150, a steel pipe connector 160, as shown in FIGS. 2 and 3A. ).

First, the steel pipe 110 is a circular steel pipe having a constant diameter according to FIG. 3A, and a cylindrical guide part 121 of the guide pipe 120 is formed on one outer circumferential surface, and a steel material of the guide pipe 120 is formed on the opposite outer circumferential surface. It can be seen that each of the water stop plates 122 extends laterally.

Accordingly, a perforated hole (h) having a diameter into which the steel pipe 110 formed in both sides of the guide pipe 120 can be inserted is formed in the ground in advance, and the steel pipe 110 is inserted into the perforated hole, and then inserted first. The steel pipes 110 are connected to each other in a manner such that the steel material index plate 122 of the steel pipe 110 connected to the cylindrical guide part 121 of the steel pipe 110 is inserted downward from the top to be guided.

Accordingly, according to FIG. 3A, it can be seen that the guide pipe 120 is composed of a cylindrical guide portion 121 and a steel index plate 122.

The cylindrical guide part 121 is formed of a vertical hollow pipe 121b in which one side is integrated with a connection flange 121a formed in the form of a vertical plate over the extended length of the steel pipe 110, and the other side of the vertical hollow pipe 121b The opening 121c is formed so that the steel material index plate 122, which will be described later, is inserted downward from the upper side of the vertical hollow pipe 121b and in the opening 121c to be installed as a guide.

The steel index plate 122 is integrally formed on the outer circumferential surface of the steel pipe 110 at a position opposite to the cylindrical guide portion 121, and a filling hole 122b is formed in the connection flange 122a in the form of a vertical plate. The formed vertical hollow pipe (122c) is formed to be integrated.

At this time, the vertical hollow pipe (122c) is wrapped with a water expansion index material (122d) on the outer circumferential surface, and is inserted into the vertical hollow pipe (121b) of the cylindrical guide part 121 while the water expansion index member (122d) is wrapped It is shaped to be sized.

In addition, the connection flange 122a integrally formed in the vertical hollow tube 122c is integrally inserted into the cylindrical guide portion 121 and the opening 121c.

Thus, when water enters by the water expansion index member 122d, the water expansion index member 122d expands to enable the first order from the rear surface of the steel pipe by the guide pipe 120, and the vertical hollow pipe 122c ), the liquid waterproofing material is injected to the outside through the filling hole 122b of the vertical hollow pipe 122c, thereby enabling a secondary degree from the rear of the steel pipe.

In addition, as shown in Fig. 3a, the stud 130 is formed on the outer circumferential surface of the steel pipe toward the front side, so that when constructing the both side walls 310 of the underground structure 300, it is used as a shear connector for securing the composite performance in casting shotcrete or sidewall concrete. To be able to work.

In addition, as shown in FIG. 3A, the steel pipe connection plate 140 is formed to be located toward the front side of the guide pipe 120 between the outer circumferential surfaces of the steel pipes connected to each other. The third order from the rear surface of the steel pipe is possible by the steel pipe connection plate 140.

In addition, the inside of the steel pipe 110 is filled with concrete so that the main column wall 100 is a concrete-filled steel pipe to secure structural rigidity, so that it can act as both side walls 310 of the underground structure 300. do.

It is not necessary to fill the recovered upper steel pipe 110b by filling the concrete filling depth above the upper plate structure 320 only up to the steel pipe connection 160 to be described later.

In addition, as shown in FIG. 3A, it can be seen that the steel pipe bracket 150 formed toward the front side on the outer circumferential surface of the steel pipe 110 is further integrally formed at a position where the end of the precast upper plate 321 to be described later is supported.

Accordingly, as shown in FIG. 3A, the steel pipe bracket 150 is formed of a horizontally extended upper section steel 151 and a stiffener plate 152 between the lower surface of the upper section steel and the outer circumferential surface of the steel pipe, and the precast upper plate 321 on the upper surface of the upper section steel 151 ) The bottom of the end can be supported.

As shown in FIG. 2, since the steel pipe 110 is buried from the ground surface to the upper plate structure 320 of the underground structure 300 by the final restoration, the steel pipe connection 160 located above the upper plate structure 310 of the underground structure 300 To form, and the upper steel pipe 110b above the steel pipe connector 160 is recovered.

Accordingly, as shown in Fig. 3a, the upper and lower steel pipes 110a and 110b are connected in a socket manner based on the steel pipe connection 160, and are integrated with each other by a horizontal bolt and a nut penetrating the steel pipe connection, and the horizontal bolts are loosened during recovery. The upper steel pipe 110a is made to be recoverable.

Next, as shown in Figs. 2 and 3A, the intermediate wall 200 is formed by installing struts 220 between the two main column walls 100 when the lateral distance between the two main column walls 100 increases. It is also necessary to be able to resist resistance, and when the lateral distance between the two main column walls 100 increases, the underground structure 300 also extends in the transverse direction, so that the upper plate structure 320 is formed as the inner wall 330 There is a need for intermediate support.

Accordingly, the intermediate wall 200 is formed by including a vertical steel material 210 and an intermediate bracket 250 as shown in FIGS. 2 and 3B.

As shown in FIG. 3B, the vertical steel material 210 is inserted into the ground by being separated from each other in the longitudinal direction when the steel pipe 110 is constructed using an H-type steel beam. The separation distance may be determined so as to support the precast upper plate 321 in the longitudinal direction.

Accordingly, a perforated hole (h1) having a diameter into which the vertical steel material 210 can be inserted is formed, and the vertical steel material 210 is inserted into the perforated hole, and concrete is placed only in the perforated hole located in the lower ground of the lower structure 340. By pouring and curing, the lower part is fixed and constructed.

The intermediate bracket 250 is a support for supporting the end of the precast upper plate 321 as shown in FIG. 3B, and has the same function as the steel pipe bracket 150 formed on the steel pipe 110.

For example, in order to support the ends of the precast top plate 321 on both sides, h-type steels 251 extending in both sides of the vertical steel are formed by welding, etc., and use a formwork not shown in both sides. The extended h-type steel is buried so that the concrete pedestal is formed in a spherical shape.

The underground structure 300 is a box body structure constructed to be continuous in the underground in the longitudinal direction using the main column wall 100 and the intermediate wall 200 as described above, as shown in FIGS. 2 and 3, and both side walls 310 ), an upper plate structure 320, an inner wall body 330, and a lower plate structure 340.

The underground structure 300 is constructed in a top-down manner, so that only the upper plate structure 320 can be constructed so that a vehicle can be passed to the top of the underground structure 300.

Accordingly, as shown in FIG. 2, the two side walls 310 are constructed by pouring concrete into the steel pipe 110 as described above to construct the main column wall 100, and then the two main column walls 100 that are constructed horizontally apart from each other. ) After excavating the ground between the inner side first to expose the main column wall 100, the steel pipe connection plate 140 and the steel pipe 110 are used as formwork on the exposed main column wall, and side wall concrete is poured so that the stud 130 is buried. After forming in such a way that it is formed by finishing with a panel.

Accordingly, the steel pipe 110 filled with concrete is the both side walls 310 of the underground structure 300, and has a 1, 2, 3 order function and resists earth pressure, and the upper plate structure and the lower plate structure are connected.

As shown in FIGS. 3A and 3B, the top plate structure 320 is formed by installing both main column walls 100 in the top-down method, and after installing the steel pipe bracket 150 on the steel pipe, the precast top plate 321 After the end is supported, the top plate concrete is poured and constructed so that the precast top plate 321 is integrated with the two main column walls 100.

In other words, it is possible to quickly construct a top plate structure by using a method of mounting the precast top plate 321 without using only cast-in-place concrete, and then integrating it with both main column walls 100 through the top plate concrete. do.

At this time, when the intermediate wall 200 is constructed between the two main column walls 100, a precast top plate 321 is placed between the intermediate bracket 250 formed on the vertical steel material 210 and the steel pipe bracket 150. It is installed, and the concrete top plate 321 is poured and constructed so that the vertical steel is buried.

In the top-down method, in the top-down method, both the precast top plate and the top plate concrete are used because the upper part is restored or a retracted plate is installed to enable vehicle passage, and the underground structure 300 is additionally constructed. It can be seen that the construction is being carried out quickly.

The inner wall 330 has a constant width continuously in the longitudinal direction so that the vertical steel 210 of the intermediate wall 200 is buried between the upper plate structure 320 and the lower plate structure 340, as shown in FIGS. 2 and 3B. It will be constructed with a concrete wall.

The lower plate structure 340 may be formed of a concrete plate structure having a predetermined thickness between the lower ends of both side walls 310, as shown in FIGS. 2 and 3B.

Figure 3c shows the construction of the waterproof sheet 350 in the construction of the upper plate structure 320 and the lower plate structure 340.

That is, since both ends of the upper plate structure 320 and the lower plate structure 340 are connected to the two main column walls 100, there is a difference in construction time, so that a construction joint may occur, and water leakage may occur through this.

Therefore, in the case of the upper plate structure 320 as shown in Figure 3c

A protective layer 351 is formed on the upper surface of the upper plate structure to have a certain thickness, a sheet waterproofing material 352 is installed on the upper surface of the protective layer 351, and a primer plate is applied to the upper surface of the sheet waterproofing material 352, and then the protective mortar 353 Is formed to a certain thickness, but the portion in contact with the steel pipe 110 of both main column walls 100 is arranged so that the sheet waterproofing material 352 overlaps up and down, and the upper sheet waterproofing material 352a is a U-shaped bottom filled with rubber. The reinforcing plate 354 formed with the bent portion is connected to the lower sheet waterproofing material 352b so that the lower sheet waterproofing material 352b is in contact with the main heat chamber wall 100, and the upper sheet waterproofing material 352a is placed on the lower sheet waterproofing material 352b. And the upper sheet waterproofing material 352a overlaps the lower sheet waterproofing material 352b, and the lower sheet waterproofing material 352b is connected to each other with the reinforcing plate 354 formed with a U-shaped bent part filled with rubber, and the flow path is It can be seen that the index is made possible by the U-shaped bent part filled with rubber as it is extended.

Next, in the case of the lower plate structure 340 as shown in Figure 3c

A protective mortar 353 is formed on the upper surface of the discarded concrete to a certain thickness, and after applying a primer, a sheet waterproofing material 352 is installed, and a protective layer 351 is formed, and the lower plate is placed on the upper surface of the protective layer 351. The structure 340 is formed, but the portion in contact with the steel pipe 110 of both main column walls 100 is arranged so that the sheet waterproofing material 352 overlaps up and down, and the lower part of the upper sheet waterproofing material 352a is filled with rubber. It can be seen that the reinforcing plate 354 in which the U-shaped bent portion is formed is connected to the lower sheet waterproofing material 352b so that the water flow path is extended and the water index by the rubber is possible.

[Construction method of underground structure manufactured in top-down method using main heat type wall]

4A and 4B show a flow chart of a top-down method of constructing an underground structure using an underground structure 300 manufactured using the main column wall 100 of the present invention.

The above construction method is after constructing both the main column wall body 100 and the intermediate wall body 200, excavating the ground between the both column wall body 100, and after installing the top plate structure 320, the top plate structure ( 320) This is a method of closing the lower plate structure 340, both side walls 310 and the inner wall body 330 by allowing the vehicle to pass through the upper excavated space and continuously excavating the ground under the upper plate structure 320.

First, according to FIG. 4A,

It can be seen that three perforated holes h are spaced apart from each other in the transverse direction for the construction of both the main column wall body 100 and the intermediate wall body 200.

Accordingly, the left and right perforation holes (h) are connected to the steel pipe 110 for the construction of both main column walls 100 in the longitudinal direction, and the concrete is filled inside, but filled only up to the bottom of the steel pipe connector 160, and the middle After inserting the vertical steel material 210 into the perforated hole h, it can be seen that concrete is filled only in the lower part of the lower plate structure 340.

Next, while excavating the ground between the two main column walls 100, struts (220, braces) are installed to prevent the risk of collapse due to excavation, and the steel pipe 110 of the both main column walls 100 and the intermediate wall 200 ) And the vertical steel material 210 is exposed.

After forming the steel pipe bracket 150 and the intermediate bracket 250 of the steel pipe 110 and the vertical steel material 210 exposed thereto, the ends of the precast top plate 321 are the steel pipe bracket 150 and the intermediate bracket 250 ) It is mounted to be supported on the upper surface.

Next, according to FIG. 4B,

Reinforcing bars are laid in the space between the two main column walls 100 and the precast top plate 321, and upper concrete is poured on the top, so that the precast top plate 321 is integrated with both the main column walls 100, and the top plate structure 310 ) Will be constructed first.

At this time, by additionally installing a double-hole plate on the heads of both the main heat chamber wall 100 and the intermediate wall 200 on the upper plate structure to enable vehicle passage.

Next, the lower plate structure 340 is constructed by additional excavation of the lower ground of the upper plate structure 330. When constructing the upper plate structure 320 and the lower plate structure 340 with water, the waterproof sheet 350 is installed together.

Next, wall concrete is poured on the exposed surfaces of both main columned walls 100 in the upper and lower spaces between the upper plate structure 320 and the lower plate structure 340, and intermediate wall concrete is poured on the exposed vertical steel material. As a result, both side walls 310 and inner walls 330 are completed, and the construction of the underground structure 300 is completed.

At this time, although not shown, in the case of deepening between the upper plate structure and the lower plate structure, additional struts are installed between both main column walls and the lower panel structure is constructed, and then wall concrete is poured on the exposed surfaces of both main column walls 100, After pouring the intermediate wall concrete on the exposed vertical steel, it can be constructed by removing the strut.

Accordingly, the upper plate structure 320 is removed, the connection bolts of the steel pipe bracket 150 formed on the steel pipe are loosened, the excavation space is restored, and the upper steel pipes of the two main column walls 100 are removed before compaction. And, the vertical steel material 210 is also removed and recovered by the length of the upper steel pipe. Accordingly, the final restored ground is compacted and a pavement layer is formed on the surface.

The above description of the present invention is for illustrative purposes only, and those of ordinary skill in the art to which the present invention pertains will be able to understand that other specific forms can be easily modified without changing the technical spirit or essential features of the present invention will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

100: main heating wall
110,100a,100b: steel pipe, upper steel pipe, lower steel pipe
120: guide tube 121: cylindrical guide portion
121a: connecting flange 121b: vertical hollow pipe
121c: opening
122: steel index plate 122a: connecting flange
122b: filling hole 122c: vertical hollow pipe
122d: water expansion index material
130: stud 140: steel pipe connection plate
150: steel pipe bracket
151: upper section steel 152: stiffener plate
160: steel pipe connection
200: intermediate wall
210: vertical steel 220: strut
250: middle bracket
300: underground structure
310: both side walls 320: upper plate structure
321: precast top plate 330: inner wall
340: lower plate structure

Claims (10)

Both main column type walls 100 formed by connecting and installing the steel pipe 110 in the longitudinal direction using the guide pipe 120; And
It is formed so as to be integrated with both main column walls by pouring concrete on the precast top plate 321 mounted between both main column walls using a space formed by excavating the ground between the two column walls 100 from the ground surface. A top plate structure 320; The lower plate structure 340 formed between the two main columned walls 100 by excavating the lower part of the upper plate structure 320; and both the exposed main columned wall 100 between the upper plate structure 320 and the lower plate structure 340 Both sidewalls 310 formed by pouring sidewall concrete; an underground structure 300 including; an underground structure manufactured in a top-down manner using a main column type wall including. The method of claim 1,
The steel pipe 110 has a cylindrical guide portion 121 of the guide pipe 120 formed on one outer circumferential surface, and the steel material index plate 122 of the guide pipe 120 is extended laterally on the opposite outer circumferential surface,
After inserting the steel pipe 110 into the perforated hole formed in the ground, the steel index plate 122 of the steel pipe 110 connected to the cylindrical guide part 121 of the first inserted steel pipe 110 is inserted downward from the top. An underground structure manufactured in a top-down manner using a main column wall to be guided. The method of claim 2,
The cylindrical guide part 121 is formed of a vertical hollow pipe 121b in which one side is integrated with a connection flange 121a formed in the form of a vertical plate over the extended length of the steel pipe 110, and the other side of the vertical hollow pipe 121b It is manufactured in a top-down manner by using a main column wall that allows the opening 121c to be formed so that the steel index plate 122 is inserted downward from the top and guided into the vertical hollow pipe 121b and the opening 121c. Underground structures. The method of claim 2,
The steel index plate 122 is integrally formed on the outer circumferential surface of the steel pipe 110 at a position opposite to the cylindrical guide portion 121, and a filling hole 122b is formed in the connection flange 122a in the form of a vertical plate. It is formed so that the formed vertical hollow tube (122c) is integrated,
The vertical hollow pipe (122c) uses a main column wall formed in size so that it can be inserted into the vertical hollow pipe (121b) of the cylindrical guide portion (121) while the water expansion index member (122d) is wrapped around the outer circumferential surface. An underground structure manufactured in a top-down method. The method of claim 4,
When water enters by the water expansion index member 122d, the water expansion index member 122d expands to enable the first order from the rear surface of the steel pipe by the guide pipe 120,
When the liquid waterproofing material is injected into the vertical hollow pipe 122c at high pressure, the liquid waterproofing material is injected to the outside through the filling hole 122b of the vertical hollow pipe 122c, thereby enabling an additional second order from the rear of the steel pipe,
It is a top-down method by using a main heat type wall that enables a third degree from the rear of the steel pipe by the steel pipe connection plate 140 formed to be positioned toward the front side of the guide pipe 120 between the outer circumferential surfaces of the steel pipes connected to each other. Constructed underground structure. The method of claim 1,
The precast top plate
A steel pipe bracket that is formed of a horizontally extended upper section steel 151 and a stiffener plate 152 between the lower surface of the upper section steel and the outer circumferential surface of the steel pipe so that the upper section of the upper section 151 is supported by the lower end of the precast top plate 321 ( Underground structure manufactured in a top-down manner using main column walls to be mounted between both main column walls by 150). The method of claim 1,
A steel pipe connection unit 160 located above the upper plate structure 310 of the underground structure 300 is further formed in the steel pipe 110 to divide the steel pipe into an upper steel pipe 110a and a lower steel pipe 110b,
The upper and lower steel pipes 110a and 110b based on the steel pipe connection 160 are connected by overlapping in a socket type, and they are integrated with each other by a horizontal bolt and a nut penetrating the steel pipe connection part, and the upper steel pipe 110a by loosening the horizontal bolt when restoring. An underground structure manufactured in a top-down method using a main column wall that allows silver recovery. The method of claim 1,
An intermediate wall 200 is further installed between the two main column walls, and the intermediate wall 200 is
A perforated hole h1 having a diameter into which the vertical steel 210 can be inserted is formed, the vertical steel 210 is inserted into the perforated hole, and concrete is poured only into the perforated hole located in the lower ground of the lower structure 340 And curing to form the lower part fixed,
An intermediate bracket 250 is installed to form an h-type steel extending in both sides of the vertical steel 210, and the h-type steel extending in both sides is buried so that the concrete support is formed in a spherical shape, and precast So that the end of the top plate 321 is supported,
The inner wall 330 is further formed with a concrete wall having a constant width continuously in the longitudinal direction so that the vertical steel material 210 of the intermediate wall 200 is buried between the upper plate structure 320 and the lower plate structure 340. An underground structure manufactured in a top-down method using a main column wall. (a) connecting and installing steel pipes in a longitudinal direction using a guide pipe to construct both main column walls;
(b) using a space formed by excavating the ground from the ground surface between the two main column walls, pouring top plate concrete on the precast top plate mounted between the two main column walls to form a top plate structure to be integrated with both main column walls ;
(c) excavating the lower part of the upper plate structure to form a lower plate structure while installing struts between both main column walls; And
(d) constructing an underground structure by forming both side walls by using sidewall concrete formed on both exposed main column walls between the upper plate structure and the lower plate structure, and including,
In the step (b), in the construction of the upper plate structure 320, a waterproof sheet 350 is installed,
The waterproof sheet 350 installed on the upper plate structure
A protective layer 351 is formed on the upper surface of the upper plate structure 320 to have a certain thickness, a sheet waterproofing material 352 is laid on the upper surface of the protective layer 351, and a primer coat is applied on the upper surface of the sheet waterproofing material 352, and then protected. The mortar 353 is formed to have a certain thickness, but the part in contact with the steel pipe 110 of both main column walls 100 is arranged so that the sheet waterproofing material 352 overlaps up and down, but the upper sheet waterproofing material 352a is lower than the rubber The reinforcing plate 354 filled with the U-shaped bent portion is connected to the lower sheet waterproofing material 352b so that the lower sheet waterproofing material 352b contacts the main heat chamber wall 100, and the upper sheet waterproofing material on the upper part of the lower sheet waterproofing material 352b (352a) is located, and the upper sheet waterproofing material 352a overlaps the lower sheet waterproofing material 352b, and the lower sheet waterproofing material 352b is connected to each other with the reinforcing plate 354 formed with a U-shaped bent part filled with rubber. , Underground structure construction method manufactured in a top-down method using a main-heated wall that enables water retention by a rubber-filled U-shaped bend while the running path is extended. The method of claim 9,
In the construction of the lower plate structure 340 of step (c), a waterproof sheet 350 is installed,
The waterproof sheet 350 installed on the upper plate structure
A protective mortar 353 is formed on the upper surface of the discarded concrete to a certain thickness, and after applying a primer, a sheet waterproofing material 352 is installed, and a protective layer 351 is formed, and the lower plate is placed on the upper surface of the protective layer 351. The structure 340 is formed, but the portion in contact with the steel pipe 110 of both main column walls 100 is arranged so that the sheet waterproofing material 352 overlaps up and down, and the lower part of the upper sheet waterproofing material 352a is filled with rubber. Construction method of an underground structure manufactured in a top-down method by using a main heat type wall that allows the reinforcing plate 354 formed with a U-shaped bent portion to be connected to the lower sheet waterproofing material 352b so that the water flow path is extended and water index by rubber is possible .

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