KR102439239B1 - Connecting box for underground continuous wall and construction method using them same - Google Patents

Abstract

When connecting the continuous underground wall at the connecting part between the adjacent continuous underground wall and the continuous underground wall, it is possible to secure the structural integrity of the underground continuous wall by constructing the reinforcing bar network of the underground continuous walls as overlapping reinforcing bars. The present invention relates to a connection box body for a continuous underground wall having an effective spill prevention device for earthquake-resistant design of a wall, and a method for constructing an underground continuous wall using the same.

Description

Connection box body for continuous underground wall with spill prevention device and construction method for underground continuous wall using the same

The present invention relates to a connection box body for a continuous underground wall having a leak prevention device and a method for constructing an underground continuous wall using the same. More specifically, when connecting the continuous underground wall at the connecting part between the adjacent continuous underground wall and the succeeding continuous underground wall, the structural integrity of the continuous underground wall can be secured by constructing the reinforcing bar network of the continuous underground walls to be set as overlapping reinforcing bars. The present invention relates to a connection box body for a continuous underground wall having an effective outflow prevention device for earthquake-resistant design of a continuous underground wall, and a method for constructing an underground continuous wall using the same.

The conventional underground continuous wall blocks the inflow of groundwater, trench excavates the ground to a predetermined depth designed for a bucket or trench cutter suitable for excavation of soil, and then supplies a stabilizing solution in proportion to the excavated soil volume to cause the trench excavation surface to collapse. It is a construction method constructed in such a way as to form a continuous reinforced concrete wall in the ground by repeating the work of preventing the occurrence of the

Figure 1a shows a construction example of a conventional underground continuous wall.

That is, the first continuous underground wall (W1) of a certain length is constructed, the second continuous underground wall (W2) is constructed by being spaced apart by the connection portion 22, and the connection portion 22 is used with an excavator (bucket or trench cutter). ), and then inject the stabilizing solution to connect the first continuous underground wall (W1) and the second continuous underground wall (W2) to the connection portion and construct the continuous underground wall (W3) at the connection site to be integrated. it can be seen that there is

However, according to the recent “Seismic Design Standards for Buildings (KSD 41 17 00)”, in the case of continuous underground walls, in-plane bending, that is, underground A problem arises in that the construction of an underground continuous wall that can safely behave even with a bending moment acting in the extension direction (longitudinal direction) of the continuous wall has to be made.

That is, the conventional continuous underground wall is constructed to be continuous and integrated with the underground continuous wall at the connection part of the continuous underground wall constructed to be spaced apart from each other. How to construct the wall connection part to satisfy the “Seismic Design Standard for Buildings (KSD 41 17 00)” emerged as a very important issue.

Figure 1b shows a continuous construction example of a conventional underground continuous wall.

That is, the continuation and integration of the adjacent underground continuous wall in the prior art is the end horizontal root (5: 5a, 5b) drawn out from the end closing plate 3 of the preceding underground continuous wall 1 and the end horizontal of the succeeding underground continuous wall 2 After setting the reinforcing bar (8) and the reinforcing bar (11) to overlap each other in the trench at the connection part, pour the concrete for the trailing underground continuous wall (2), and in the end, you can see that the adjacent continuous underground wall is continuously constructed by connecting the reinforcing bars. can

Accordingly, although it is possible to secure the longitudinal integrity of the underground continuous wall by constructing the end horizontal reinforcing bars 8 and the reinforcing reinforcing bars 11 to overlap each other, in construction, the end finishing plate of the preceding continuous underground wall 1 In the state that the reinforcing bar is exposed to the connecting part by means of (3), the trench of the connecting part is excavated, the stabilizing solution is injected into the connecting part trench, and the succeeding underground continuation is applied to the reinforcing bar of the exposed preceding continuous underground wall (1). As the reinforcing bars by the end finishing plate 3 of the wall 2 have to be constructed so that they overlap each other, a lot of space-time interference between the reinforcing bars occurs, and there is a limit in which constructability and workability are deteriorated.

Figure 1c shows a continuous construction example of the underground continuous wall using a conventional joint box.

In the joint box, in a state in which the joint box 4 is integrally formed so that the end of the reinforcing bar network 21 for the preceding underground continuous wall is penetrated, the preceding concrete 23 for the underground continuous wall is poured to the inside of the joint box 4 When the furnace is cured in a state in which the preceding underground continuous wall concrete 23 is excluded, it is possible to draw upwards on the connection side of the joint box 4, and the end of which the teflon 8 is integrally formed on both sides. It can be seen that the joint box 4 can be opened by the closing plate 22 .

That is, by avoiding the exposure of the end of the reinforcing bar network 21 for the underground continuous wall by the end closing plate 22 installed in the joint box 4, the workability deterioration due to the rebar exposure in the continuous underground wall construction is prevented. it can be seen that

As a result, it can be seen that the reinforcing bars exposed inside the joint box 4 overlap with the reinforcing bars of the continuously constructed underground continuous wall to ensure the structural integrity of the adjacent continuous underground wall by pouring concrete.

However, since these joint boxes 4 are buried in the ground and sacrificed except for the end end plate 22, it is difficult to secure efficiency and economical efficiency, and the end of the reinforcing bar network 21 must be penetrated through the joint box 4 Therefore, manufacturing is inevitably complicated, and excessive construction load is applied, or in order to sufficiently secure the anchoring length of the overlapping reinforcing bars (secure anchorage), problems such as deformation due to the increase in the size of the joint box 4 may occur. There was a limit to that.

Republic of Korea Patent No. 10-1216716 (Title of the invention: underground continuous wall and its construction method, publication date: May 11, 2012) Republic of Korea Patent No. 10-1037774 (Title of the invention: Connection structure for underground continuous wall construction and underground continuous wall construction method using the same, publication date: March 25, 2010) Japanese Patent No. 264929 (Title of the invention: Joint structure with underground continuous wall, publication date: January 26, 1993) Japanese Patent No. 254079 (Title of the invention: Joint box for continuous underground wall construction, publication date: July 30, 1993)

Accordingly, the present invention uses a connection box body for a continuous underground wall having an outflow prevention port in the construction of the connection portion (S) of the preceding continuous wall and the succeeding continuous wall of the adjacent continuous underground wall in the seismic design of the continuous underground wall, A space secured by the connection box body for continuous underground walls equipped with a preventive device, and an extra space to sufficiently secure the anchorage of overlapping reinforcing bars (extended length and width of the connection box body for continuous underground walls equipped with a spill prevention device) control) safely, but it is easy to assemble and install, so construction efficiency is improved, and the connection box body for continuous underground walls equipped with a spill prevention device that meets the seismic design standards and a method for constructing an underground continuous wall using the same It is a technical problem to be solved.

In addition, the present invention enables the continuous construction of the underground continuous wall while securing economic feasibility by allowing the connection box body for the underground continuous wall having the used outflow prevention device to be pulled out except for the opening closing plate after the preceding continuous wall construction and to be reused. It is a technical task to solve the provision of a connection box body for a continuous underground wall equipped with a spill prevention device and a method for constructing an underground continuous wall using the same.

In addition, the present invention provides a connection box body for a continuous underground wall having a leak prevention device in which the underground continuous wall reinforcing bar network is equipped with a spill prevention device in a state in which the connection box body for a continuous underground wall having a leakage prevention device is first buried in a stable liquid during the preceding continuous wall construction Since it can be installed to be inserted down into the interior hollow, it is possible to separate the construction process of the underground continuous wall reinforcing bar network and the connection box body for the underground continuous wall equipped with a spill prevention device. It is a technical task to solve the provision of a connection box body for a continuous underground wall and a construction method for an underground continuous wall using the same.

In addition, the present invention provides an underground continuous wall reinforcement network equipped with a spill prevention device when pouring concrete for a preceding continuous wall construction even though it is installed so that it is inserted into the hollow inside the connection box body for a continuous underground wall having a leak prevention device. A concrete finishing part is formed in the hollow inside of the wall connection box body to prevent the poured concrete from flowing in, so it is possible to draw out the connection box body for an underground continuous wall equipped with a spill prevention device, thereby securing economic feasibility and continuous underground wall continuation construction. It is a technical task to solve the provision of a connection box body for a continuous underground wall equipped with a spill prevention device and a method for constructing an underground continuous wall using the same.

Accordingly, the connection box body for the underground continuous wall having an outflow prevention port for achieving the above object has an opening (D2) formed between the flange portion and the open end of the inner support plate on one side and a trench (T1) on the opposite side of the opening (D2) , A hollow box-type body including the other side (D1) installed so as to be in contact with the end side of the T2, the stabilizing solution injected into the trench (T1, T2) is injected into the hollow inside; an inner support plate formed over the entire installation height of the hollow box-shaped body part and formed of a web connected to the other side surface (D1) opposite to the opening (D2) from the flange portion arranged to form the opening (D2); And in the opening (D2) between the flange portion and the open end, the end reinforcement of the underground continuous wall reinforcement network penetrates, and the stabilizing solution injected into the trenches (T1, T2) passes but the concrete (C) does not pass through the concrete finish It includes; by adjusting the extension length and width, it is possible to secure the anchoring length of the end reinforcing bar set with the overlapping reinforcing bars, and to secure safety according to the concrete (C) pouring pressure. The internal support plate is formed in the hollow inside to support the pressure and construction load by the stabilizing solution and concrete.

The present invention installs a connection box body for a continuous underground wall having an outflow prevention device used for the continuous construction of an underground continuous wall by overlapping reinforcing bars separately from the underground continuous wall reinforcing bar network, and can be recovered except for the opening closing plate. Accordingly, it is possible to secure the economic feasibility by reusing the connection box body for the underground continuous wall equipped with the leak prevention port while securing the constructability and workability.

In addition, even if the connection box body for the underground continuous wall equipped with an outflow prevention device and the underground continuous wall reinforcing bar network are installed through a separate process, the underground continuous wall reinforcing bar network is inserted into the hollow inside the connection box body for the underground continuous wall equipped with the leakage prevention device Construction management and quality control by using the concrete finishing part to prevent the concrete poured into the hollow inside the connection box body for underground continuous walls will be advantageous to

In addition, according to the connection box body for a continuous underground wall having a leak prevention device according to the present invention, it can be manufactured at various installation heights, so that it can be applied to various underground continuous wall constructions.

In addition, the connection box body for the underground continuous wall having an outflow prevention device according to the present invention is provided with an internal connection plate, so that stable load resistance is possible even with an increase in the extension length for securing the anchorage of the overlapping reinforcing bars.

In addition, the connection box body for a continuous underground wall having an outflow prevention device according to the present invention is able to sufficiently secure the longitudinal structural integrity of the continuous underground wall, which is very effective in seismic design.

Figure 1a is a construction example of a conventional underground continuous wall,
Figure 1b is a continuous construction example of a conventional underground continuous wall,
Figure 1c is a continuous construction example of the underground continuous wall using a conventional joint box,
2, 3 and 4 are a configuration perspective view and an installation example of a connection box body for an underground continuous wall having a leak prevention device of the present invention;
Figures 5a, 5b, 5c and 5d shows a flow chart of the construction method of the underground continuous wall using the connection box body for the underground continuous wall provided with the outflow prevention device of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 them. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached 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.

[Connection box body 100 for underground continuous wall having a leak prevention device of the present invention]

2, 3 and 4 show a configuration perspective view and an installation example of the connection box body 100 for an underground continuous wall having an outflow prevention device of the present invention.

The connection box body 100 for the underground continuous wall provided with the leak prevention device can be simply referred to as the underground continuous wall connection box body 100 .

Referring to FIG. 3, this underground continuous wall connection box body 100 is a trench (in a state in which stabilizing liquid is injected into the excavated trenches T1 and T2 for the preceding continuous underground wall 210 and the following continuous underground wall 220) T1, T2) is inserted and installed in the end space first, and the underground continuous wall reinforcing bar network 240 is lifted separately and inserted down so as to span the inner hollow of the underground continuous wall connection box body 100 inserted in the stabilizing solution.

At this time, as shown in Fig. 2, in the opening (D2) of the connection box body 100 for the underground continuous wall, the end reinforcing bar of the underground continuous wall reinforcing bar network 240 is inserted in the process of the opening closing plate 130 being fitted to the concrete finishing part 150. As the 241 is naturally inserted, it is inserted into the hollow inside of the connection box body 100 for the underground continuous wall.

Accordingly, the opening closing plate 130 fitted into the concrete finishing unit 150 serves to prevent the poured concrete (C) from flowing into the hollow inside the connecting box body 100 for the underground continuous wall.

That is, referring to Figure 4, when the concrete (C) is poured from the lower part of the trench (T1, T2), the opening closing plate 130 inserted into the concrete finishing part 150 blocks the concrete inflow, and the connection box body for the underground continuous wall Concrete (C) does not flow into the hollow inside of (100).

At this time, the connection box body 100 for the underground continuous wall except for the opening closing plate 130 is drawn out and removed before the concrete is cured, so that reuse is possible, and the part where the connection box body 100 for the underground continuous wall is formed is underground. In a state in which the end reinforcing bars 241 of the continuous wall reinforcing bar network 240 are filled in the stabilizing liquid, the preceding continuous underground wall 210 and the succeeding underground continuous wall 220 are completed.

Accordingly, in a state where the end reinforcement 241 of the preceding underground continuous wall 210 and the trailing underground continuous wall 220 are buried in the trenches T1 and T2, the connection part S is excavated to form a trench T3, , the stabilizing solution is injected into the trench T3.

Thus, the exposed end reinforcing bar 241 of the leading underground continuous wall 210 and the succeeding underground continuous wall 220 and the end reinforcing bar 251 of the connecting portion underground continuous wall 230 are set as overlapping reinforcing bars with each other. After inserting 250 into the trench (T3) in which the stabilizing solution is injected,

Concrete (C) is poured into the trench (T3) of the connection part (S), so that the leading underground continuous wall 210, the trailing underground continuous wall 220 and the connecting part underground continuous wall 230 are structurally continuous with each other. .

At this time, if the extension length and width of the connection box body 100 for the underground continuous wall are adjusted, the anchorage length (fixture site) of the overlapping reinforcing bars can be sufficiently secured, and safety according to the concrete (C) pouring pressure can be secured. By forming the inner support plate 120 in the hollow inside, it is possible to support the pressure and the construction load by the stabilizing liquid and concrete.

Accordingly, the connection box body 100 for the underground continuous wall is, as shown in FIGS. 2, 3 and 4, a hollow box-type body part 110, an internal support plate 120, an opening closing plate 130, and a concrete finishing part 150. includes

First, in the connection box body 100 for the underground continuous wall, the hollow box-shaped body part 110 and the inner support plate 120 are integrally formed, and the opening closing plate 130 is installed together with the underground continuous wall reinforcing bar network 240 . becomes the final sacrifice.

In addition, the concrete finish part 150 is formed between the side end of the inner support plate 120 and the open end part 113 of the hollow box-shaped body part 110 so that the opening end plate 130 is inserted, so that the concrete C is hollow. The box-shaped body part 110 serves to prevent the inflow into the inner hollow while allowing the stabilizing solution to pass therethrough.

Accordingly, it can be seen that the hollow box-shaped body part 110 can be manufactured by using steel as a hollow box body having a U-shaped cross section so that an inner hollow is formed, for example, as shown in FIGS. 2, 3 and 4, and installed vertically. In consideration of the height, the individual body parts 111 are manufactured to have a constant height, and the individual body parts 111 are assembled with each other using connectors 112 such as splices to use those manufactured at a constant height.

When assembled and manufactured in this way, it can be used for underground continuous wall construction with various construction depths, and thus there is an advantage of securing applicability.

This hollow box-shaped body part 110 is made of a U-shaped steel box body with an opening D2 formed on one side and the other side D1 in contact with the trench end while accommodating the stabilizing solution in the inner hollow, but the shape is arbitrary, In the inner hollow, an inner support plate 120, which will be described later, is formed extending from the other side D1 toward the opening D2, so that the opening D2 is naturally formed between the open end 113 and the side of the inner support plate 120. .

At this time, the inner support plate 120 and the opening end 113 forming the opening D2 have a leak prevention hole 151, which is a fitting groove, as a concrete finishing part 150. The inner support plate 120 and the open end part ( 113), the opening D2 is opened and closed by the opening closing plate 130 fitted to the outflow prevention port 151 .

Accordingly, it can be seen that the leak prevention port 151 is formed with fitting grooves formed on the side of the open end 113 and the side of the flange 121 of the inner support plate 120 .

This outflow prevention hole 151 is formed to extend downward along the inner support plate 120 and the opening end 113 facing each other, and the opening closing plate 130 is fitted in the outflow prevention hole 151, but the opening closing The stabilizing liquid (bentonite liquid, etc., for stabilizing trench hollow walls) injected into the trenches T1 and T2 through the through-holes 133 of the plate 130 passes through, and the concrete (C) containing aggregates is a hollow box-shaped body part. (110) It shall refer to a thing having a function to prevent it from passing into the inner hollow part.

The inner support plate 120 is formed in the hollow inside the hollow box-shaped body part 110 as shown in Figs. It serves to reinforce the hollow box-shaped body 110 of the cross-section of the hollow box body while resisting the pressure and construction load caused by the concrete, thereby enabling structural reinforcement according to the extension of the anchorage of the end reinforcing bar 241.

Accordingly, the inner support plate 120 is formed of, for example, T-shaped steel material over the entire installation height of the hollow box-shaped body part 110 with reference to FIGS. 2 and 3, so that the side of the flange part 121 in the form of a vertical plate has an outlet. The earth 151 is formed, and the web 122 in the form of a vertical plate is connected to the other side D1 of the hollow box-shaped body 110 opposite the opening D2 from the flange portion 121 .

This inner support plate 120 is integrally formed with the hollow box-shaped body part 110 so as to behave integrally, and the flange portion 121 of the inner support plate 120 is an opening closing plate through which the end reinforcing bar 241 passes ( 130), the width is determined so that the lower insertion is possible.

Accordingly, the end reinforcing bar 241 of the underground continuous wall reinforcing bar network 240 is inserted downwardly together with the opening closing plate 130 to the side of the flange part 121, and eventually the hollow box-shaped body part 110 precedes the internal hollow. The end reinforcement 241 of the wall 210 can be accommodated.

At this time, the lowermost end of the flange portion 121 of the hollow box-shaped body portion 110 and the inner support plate 120 is capable of a wedge action, so that it is easily seated on the remnants of the inner tip of the trench. A tapering shape (T) in which the thickness becomes thinner downward. It is preferable to form

Furthermore, as shown in FIG. 4 , a water stop groove 124 into which a water stop plate can be inserted is further formed in the flange portion 121 of the inner support plate 120 , and the water stop plate 125 is inserted thereinto and the water stop plate is cured by curing the concrete (C). By protruding from the end surface of the concrete, it is possible to solve the water index problem due to the concrete construction joint of the preceding and following continuous underground walls 210 and 220 and the connecting portion of the underground continuous wall 230 .

That is, when the concrete is cured, one side of the water stop plate is fixed to the concrete, so when the hollow box-type body part 110 is pulled out, the water stop plate 125 can be separated from the inner support plate 120 of the hollow box-type body part 110 .

Next, as shown in FIGS. 2 and 3, the opening closing plate 130 is inserted into the leak prevention hole 151 between the hollow box-shaped body 110 and the inner support plate 120, which is a hollow box with a C-section. In the form of a vertical plate capable of occluding the opening D2 between the outflow prevention holes 151, a plurality of through holes 133 are formed to be spaced apart so that the end reinforcing bars 241 can pass therethrough.

Referring to FIG. 4 , the opening closing plate 130 is inserted into the outflow prevention hole 151 between the opening end 113 and the side of the flange 121 of the inner support plate 120 , and the opening closing plate 130 . Among the through holes 133 formed in the , it is possible to prevent the concrete C from passing through the stabilizing solution by using the through holes through which the end reinforcing bar 241 does not penetrate. For this, a filter may be attached to the through-hole to pass the stabilizing solution but not concrete, or the diameter may be adjusted.

This opening closing plate 130 is also manufactured with an individual opening closing plate 131 at a constant height, and by assembling the individual opening closing plates 131 with each other using a connector 132 such as a splice to each other to have a constant height. to make use of it.

Accordingly, it is possible to install in response to the installation height of the hollow box-shaped body part 110 , so that it can be used for underground continuous wall construction having various construction depths, so there is an advantage of securing applicability.

Such an opening closing plate 130 is sacrificed by remaining in the final underground continuous wall.

Next, as shown in FIGS. 2, 3 and 4 , the concrete finishing part 150 is formed on both sides of the open end 113 of the hollow box-shaped body 110 and the flange 121 of the inner support plate 120 . It is formed with a leak prevention hole 151 which is a formed fitting groove.

Accordingly, the injected stabilizing solution serves to pass while preventing the concrete (C) from flowing into the hollow inside the hollow box-shaped body part 110 by the opening closing plate 130 inserted and installed in the outflow prevention port 151 .

Accordingly, the end reinforcing bar 241 of the underground continuous wall reinforcing bar network 240 penetrates the through hole 133 of the opening closing plate 130 installed by the concrete finishing unit 150 and into the hollow box-shaped body unit 110 inside. When the concrete (C) is poured in the installed state to be accommodated, the concrete (C) is prevented from flowing into the hollow inside the hollow box-shaped body part 110 by the concrete finishing part 150, except for the opening closing plate 130. When the connection box body 100 for the underground continuous wall is drawn out, the preceding and following continuous underground walls 210 and 220 are constructed in a state in which the end reinforcing bars 241 are exposed to the stabilizing solution of the drawn space.

5, the underground continuous wall 200 is a preceding underground continuous wall 210, a trailing underground continuous wall 220, a connection part underground continuous wall 230, an underground continuous wall reinforcing bar network 240, for a connection part Includes a reinforcing bar network (250).

That is, the preceding underground continuous wall 210 and the following underground continuous wall 220 are,

After constructing trenches (T1, T2) in the ground (G) by excavation, and injecting the stabilizing solution into the excavated trenches (T1, T2), the other side (D1) of the connection box body 100 for the underground continuous wall discussed above Insert and install into the trenches T1 and T2 first to be supported on the end of the trenches T1 and T2,

The end reinforcing bar 241 of the underground continuous wall reinforcing bar network 240 is installed through the opening closing plate 130 downward to the outflow prevention port 151 of the concrete finishing part 150 of the connection box body 100 for the underground continuous wall. so that the end reinforcing bar 241 extends into the hollow inside the connection box body 100 for the underground continuous wall,

Concrete (C) is poured from the bottom of the trenches (T1, T2) to drain the stabilizing solution,

The opening closing plate 130 is sacrificed as it is, but before the poured concrete C is cured, the connection box body 100 for the underground continuous wall is drawn out, and the end reinforcing bars 241 are the ends of the trenches T1 and T2. It is a continuous underground wall constructed to be spaced apart by the connection part (S) formed to be exposed and embedded in the side stabilizing solution.

The connection portion S, which is the ground between the preceding continuous underground wall 210 and the following continuous underground wall 220 constructed in this way, is additionally excavated in the trench T3 to inject the stabilizing solution into the trench T3.

Next, the underground continuous wall 230 at the connection site is a continuous underground wall constructed to be structurally integrated between the preceding continuous underground wall 210 and the following continuous underground wall 220 .

Next, the underground continuous wall reinforcing bar network 240 is a connection box body for the underground continuous wall installed first in the trenches (T1, T2) formed to construct the preceding continuous underground wall 210 and the following continuous underground wall 220 ( As a reinforcing bar network installed together with the opening closing plate 130 of 100), a reinforcing bar formed at the end of the reinforcing bar 241 is used.

The end reinforcing bar 241 is lowered and inserted into the concrete finishing part 150 together with the opening closing plate 130 to extend into the hollow inside the connection box body 100 for the underground continuous wall.

Next, the reinforcing bar network 250 for the connection part excavates the connection part S between the leading underground continuous wall 210 and the trailing underground continuous wall 220, and the end reinforcement 241 extended in the trenches T1 and T2. ), a stabilizing solution is injected into the trench (T3) formed so as not to be damaged, and the end reinforcing bars 241 extending in the trenches (T1, T2) and the end reinforcing bars 251 of the reinforcing bar network 250 for the connection part are used as overlapping reinforcing bars. It is a reinforcing bar network inserted into the trench T3 to be formed.

Accordingly, when concrete is poured into the trench (T3) and the stabilizing solution is discharged, the concrete is cured, and the preceding continuous underground wall 210, the succeeding underground continuous wall 220, and the connecting part underground continuous wall 230 are structurally longitudinal to each other. direction and integrated into the construction.

[Construction method of connecting box body 100 for underground continuous wall having a leak prevention device of the present invention]

5a, 5b and 5c and 5d show a flow chart of the construction method of the underground continuous wall 200 using the connection box body 100 for the underground continuous wall having an outflow prevention device of the present invention.

The construction method of the underground continuous wall 200 using the connection box body 100 for the underground continuous wall is the connection box body 100 for the underground continuous wall except for the opening closing plate 130 inserted and installed in the trenches T1 and T2 first. The end reinforcement 241 of the leading underground continuous wall 210 and the trailing underground continuous wall 220 using

After excavating the trench (T3) in the connection part (S), by injecting the stabilizing solution, in the state to be mixed with the stabilizing solution at the ends of the trenches (T1, T2),

Constructed so that the exposed end reinforcing bars 241 of the preceding underground continuous wall 210 and the trailing underground continuous wall 220 and the end reinforcing bars 251 of the reinforcing bar network 250 for the connection part are set as overlapping reinforcing bars, and concrete (C) is poured into the trench (T3) of the connection site (S), and the continuous underground wall 230 is connected between the leading underground continuous wall 210 and the trailing underground continuous wall 220 in the longitudinal direction of the underground continuous wall 200. They are constructed so that they are structurally integrated with each other.

Accordingly, as shown in FIG. 5A , a trench T1 is constructed in the ground G using an excavator, and a stabilizing solution is injected.

The trench T1 has a rectangular cross section and is vertically formed in the ground. A trench excavator may be used, and a stabilizing solution such as a bentonite solution is injected into the trench to prevent the trench inner wall from collapsing.

Accordingly, the connection box body 100 for the underground continuous wall is provided, and the hollow box-shaped body part 110 , the internal support plate 120 , and the concrete finishing part 150 are assembled.

At this time, the connection box body 100 for the underground continuous wall is first embedded in the stabilizing solution so that the other side D1 of the connecting box body 100 for the underground continuous wall is in contact with the end space side of the trench T1, and thus the stabilizing solution is the trench T1. ) and the connection box body 100 for the underground continuous wall is introduced through the opening (D2) into the hollow inside.

Next, as shown in FIG. 5b, the concrete finishing part 150 formed in the opening D2 of the connection box body 100 for the underground continuous wall embedded in the trench T1 first is inserted into the leak prevention hole 151 and descends. The opening closing plate 130 is installed to penetrate, but in this process, the end reinforcement 241 of the underground continuous wall reinforcement network 240 set to penetrate the opening closing plate 130 is the connection box body 100 for the underground continuous wall. ) to be installed together to extend into the inner hollow.

In this state, the stabilizing solution is discharged from the trench T1 while pouring the concrete C by installing the tremi pipe so that the concrete C is poured from the lower part of the trench T1.

This concrete (C) does not flow into the hollow inside the connection box body 100 for the underground continuous wall by the concrete finishing part 150 installed in the connection box body 100 for the underground continuous wall, so only the stabilizing solution is the connection box body for the underground continuous wall ( 100) is introduced.

Accordingly, as shown in FIG. 5C , the opening closing plate 130 remains before the concrete C is cured, and the connection box body 100 for the underground continuous wall is drawn out.

Accordingly, when the concrete (C) is cured, the leading underground continuous wall 210 is left in the stable liquid by projecting the end reinforcing bar 241 into the drawn space where the connection box body 100 for the underground continuous wall is located.

Accordingly, the preceding continuous underground wall 210 and the following continuous underground wall 220 spaced apart with the connecting portion S are constructed in the same manner, and it is not possible to construct together with the preceding continuous underground wall 210 .

As a result, it can be seen that the preceding continuous underground wall 210 and the succeeding underground continuous wall 220 constructed at a position spaced apart by the connecting portion S are being constructed adjacent to each other in the longitudinal direction.

Next, as shown in FIG. 5D , a trench T3 is excavated in the connection portion S, and a stabilizing solution is also injected.

The excavation of this trench (T3) is constructed so that the end reinforcing bars 241 of the preceding and following continuous underground walls 210 and 220 are not damaged, and the stabilizing solution injected into the trench T3 is applied to the preceding and following continuous underground walls 210 and 220. The connection part (S) trench (T3) is constructed while mixing with the stabilizing solution around the end reinforcing bar (241).

In the state in which the end reinforcing bars 241 of the leading and trailing underground continuous walls 210 and 220 are embedded in the mixed stabilizing solution, the reinforcing bar network 250 for the connection part is lifted and inserted into the trench T3 while the reinforcing bar network 250 for the connecting part is inserted. ) of the end reinforcing bar 251 is set as an overlapping reinforcing bar by overlapping the end reinforcing bars 241 of the preceding and following underground continuous walls 210 and 220 .

Accordingly, when the concrete (C) is poured into the trench (T3) so that the mixed stabilizing solution of the connection part (S) is discharged, the overlapping reinforcing bars 241,251 are embedded in the concrete (C) and the preceding underground continuous wall 210 in the longitudinal direction. ), the connecting portion of the underground continuous wall 230 between the following continuous underground wall 220 is structurally integrated with each other and can resist the bending moment in the longitudinal direction, so that it is possible to provide seismic performance.

As a result, in the present invention, all of the connection box bodies 100 for the underground continuous wall except the opening closing plate 130 are drawn out and reused, and the continuous underground wall 200 can be continuously constructed in the longitudinal direction.

The foregoing description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms 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 restrictive. For example, each component described as a single type may be implemented in a distributed manner, and likewise components described as distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications 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: Connection box body for underground continuous wall having a leak prevention port
110: hollow box-type body 111: individual body
112: connector 113: open end
120: inner support plate 121: flange portion
122: web 124: index groove
125: index plate
130: opening closing plate 131: individual opening closing plate
132: connector 133: through hole
150: concrete finish 151: spill prevention port
200: underground continuous wall
210: leading underground continuous wall 220: trailing underground continuous wall
230: connection part underground continuous wall 240: underground continuous wall reinforcing bar network
241: end reinforcing bar 250: reinforcing bar network for connection part
251: end reinforcement C: concrete
D1: the other side of the hollow box-type body
D2: the opening of the hollow box-shaped body part
T1, T2, T3: Trench

Claims (11)

One side has an opening D2 formed between the flange portion 121 and the open end 113 of the inner support plate 120 and the other side is installed to be in contact with the end of the trenches T1 and T2 opposite to the opening D2. (D1), the hollow box-shaped body part 110 in which the stabilizing solution injected into the trenches (T1, T2) is injected into the hollow inside;
As being formed over the entire installation height of the hollow box-shaped body part 110, the web 122 connected to the other side D1 opposite the opening D2 from the flange part 121 arranged to form the opening D2. an inner support plate 120 formed of; and
In the opening D2 between the flange part 121 and the open end part 113, the end reinforcement 241 of the underground continuous wall reinforcement network 240 penetrates, and the stabilizing solution injected into the trenches T1 and T2 passes through. However, the end reinforcing bar 241 including; and adjusting the extension length and width to be set as overlap reinforcing bars; In order to secure the anchorage length and secure safety according to the concrete (C) pouring pressure, the internal support plate 120 is formed in the inner hollow to support the pressure and the construction load by the stabilizing solution and concrete. Connection box body for underground continuous wall. The method of claim 1,
The hollow box-shaped body part 110,
An opening (D2) is formed on one side to receive the stabilizing solution and the other side (D1) includes a U-shaped steel box body in contact with the end of the trench, and the inner hollow is formed extending from the other side (D1) toward the opening (D2) A connection box body for an underground continuous wall having an outflow prevention port in which the inner support plate 120 is integrally formed. 3. The method of claim 2,
The inner support plate 120 is,
As being formed over the entire installation height of the hollow box-shaped body part 110, from the flange part 121 disposed to form the opening D2 to the web 122 connected to the other side D1 opposite the opening D2. A connection box body for an underground continuous wall having a spill prevention port containing a steel material to be formed. The method of claim 1,
The opening closing plate 130,
As a vertical plate with a through hole 133 formed so that the end reinforcing bar 241 of the underground continuous wall reinforcing bar network 240 penetrates, the concrete finishing part 150 which is a fitting groove formed on the side of the flange part 121 and the open end part 113 ) is installed to fit into the leakage prevention port 151 of
A connection box body for a continuous underground wall having an outlet preventing the concrete (C) from passing through the stabilizing solution but not passing through the through hole 133 through which the end reinforcing bar 241 does not penetrate. The method of claim 1,
In the flange portion 121 of the inner support plate 120, a water stop groove 124 into which the water stop plate can be inserted is further formed, and the water stop plate 125 is inserted so that the water stop plate protrudes from the end surface of the concrete by curing the concrete (C). A connection box body for an underground continuous wall having an outflow prevention port to be formed. The method of claim 1,
The hollow box-shaped body part 110,
In consideration of the vertical installation height, the individual body parts 111 of the U-shaped steel box chain are manufactured at a constant height, and the individual body parts 111 are assembled with each other using the connector 112 to each other and manufactured at a constant height. ,
The opening closing plate 130,
The individual opening closing plate 131 in the form of a vertical plate is manufactured at a constant height, and the individual opening closing plate 131 is assembled with each other using the connector 112 with each other to have a leak prevention device using the one manufactured at a constant height. Connection box body for underground continuous wall. (a) so that the other side (D1) of the connection box body 100 for the underground continuous wall having the outflow prevention port of claim 1 is in contact with the end space side of the trenches (T1, T2) of the preceding and following continuous underground walls (210,220) First embedding the connection box body 100 for an underground continuous wall having an outflow prevention port 151 in the stable liquid;
(b) setting the end reinforcement 241 of the underground continuous wall reinforcement network 240 of the leading and trailing underground continuous walls 210 and 220 to pass through the opening closing plate 130;
(c) Concrete finish of the connection box body 100 for the underground continuous wall having the outflow prevention port 151 first embedded in the trench (T1, T2) inside the opening end plate 130 through which the end reinforcing bar 241 is installed The end reinforcing bar 241 of the underground continuous wall reinforcing bar network 240 of the leading and trailing underground continuous walls 210 and 220 is installed in the part 150 so as to be installed in the underground continuous wall connection box body 100 having an outflow prevention port. Installing to extend into the hollow; and
(d) Concrete (C) is poured from the lower part of the trenches (T1, T2) while the stabilizing solution is discharged from the trenches (T1, T2) to construct the preceding and following continuous underground walls (210, 220), but concrete (C) is not poured into the hollow inside the connection box body 100 for a continuous underground wall having a leak prevention port by the opening closing plate 130 installed in the concrete finishing part 150, so only the stabilizing liquid has an outflow prevention port. A method of constructing an underground continuous wall using a connection box body for a continuous underground wall having a spill prevention device comprising a; 8. The method of claim 7,
After step (d),
Before the concrete (C) is cured, the connection box body for the underground continuous wall is drawn out having an outflow prevention device except for the opening closing plate 130,
When the concrete (C) is cured, the leading and trailing underground continuous walls 210 and 220 protrude into the space in which the connection box body 100 for the underground continuous wall having an outflow prevention port is located so that it remains in the stable liquid ( The underground continuous wall construction method using the connection box body for the underground continuous wall having a spill prevention device further comprising the step e). 9. The method of claim 8,
After step (e),
A trench (T3) is excavated in the connection part (S) between the leading and trailing continuous underground walls (210, 220), and the stabilizing solution is injected, and mixing with the stabilizing solution around the end reinforcing bars (241) of the preceding and following continuous underground walls (210, 220) construction of the connection part (S) and the trench (T3),
In a state in which the end reinforcing bars 241 of the leading and trailing underground continuous walls 210 and 220 are embedded in the mixed stabilizing solution, the reinforcing bar network 250 for the connection part is lifted and inserted into the trench T3 while the reinforcing bar network 250 for the connecting part is inserted. The end reinforcing bars 251 of the overlapping reinforcing bars are set to overlap with the end reinforcing bars 241 of the leading and trailing underground continuous walls 210 and 220,
Concrete (C) is poured into the trench (T3) so that the mixed stabilizing solution of the connection part (S) is discharged, and the overlapping reinforcing bars 241,251 are embedded in the concrete (C) and the preceding underground continuous wall 210 in the longitudinal direction. , (f) of allowing the connection part underground continuous wall 230 between the trailing underground continuous wall 220 to be structurally integrated with each other and to resist the bending moment in the longitudinal direction to provide seismic performance A method of constructing a continuous underground wall using a connection box body for a continuous underground wall having a spill prevention device. 9. The method of claim 8,
The hollow box-shaped body part 110 of the connection box body 100 for a continuous underground wall having an outflow prevention port of the step (a),
An opening (D2) is formed on one side to receive the stabilizing solution and the other side (D1) includes a U-shaped steel box body in contact with the end of the trench, and the inner hollow is formed extending from the other side (D1) toward the opening (D2) The inner support plate 120 is integrally formed,
The opening closing plate 130 of the hollow box-shaped body part 110 of the connection box body 100 for the underground continuous wall having the leakage prevention port of step (a) is,
As a vertical plate with a through hole 133 formed so that the end reinforcing bar 241 of the underground continuous wall reinforcing bar network 240 penetrates, the concrete finishing part 150 which is a fitting groove formed on the side of the flange part 121 and the open end part 113 ) is installed to fit into the leak prevention hole 151, and the stabilizing solution passes through the through hole 133 through which the end reinforcing bar 241 does not penetrate, but the concrete (C) has a leak prevention hole that does not pass through it. A method of constructing a continuous underground wall using a connecting box for an underground continuous wall. 11. The method of claim 10,
The opening closing plate 130,
As a vertical plate with a through hole 133 formed so that the end reinforcing bar 241 of the underground continuous wall reinforcing bar network 240 penetrates, the concrete finishing part 150 which is a fitting groove formed on the side of the flange part 121 and the open end part 113 ) is installed to fit into the leakage prevention port 151 of
By using the through hole 133 that the end reinforcing bar 241 does not penetrate, the stabilizing solution passes but prevents the concrete (C) from passing through,
In the flange portion 121 of the inner support plate 120, a water stop groove 124 into which the water stop plate can be inserted is further formed, and the water stop plate 125 is inserted so that the water stop plate protrudes from the end surface of the concrete by curing the concrete (C). A method of constructing an underground continuous wall using a connection box body for an underground continuous wall having a spill prevention device to be formed.

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