KR20210119861A - Slurry wall, construction method for the same and wire mesh assembly - Google Patents

Abstract

The present invention relates to a structure of an underground continuous wall and an underground continuous wall construction method thereof. The underground continuous wall sequentially forms a preceding panel and a following panel. To construct the preceding panel, blocking boxes are installed on both sides of a rebar mesh and an end of the rebar mesh is sealed in a space isolated in the blocking boxes, and, in this state, concrete is placed between a pair of the blocking boxes to complete the preceding panel. Thereafter, in a state in which an end of a preceding rebar mesh is exposed as the blocking boxes are separated, ends of the rebar mesh of the following panel and the rebar mesh of the preceding panel are placed to be overlapped with each other. As concrete for the following panel is placed in a state in which the rebar meshes are overlapped with each other, the rebar meshes of the preceding and following panels can be easily buried together with the concrete. Since the blocking boxes are used as a mold, construction can be very simple. Most of all, when concrete for the preceding panel is placed, the concrete can be fundamentally prevented from being introduced into both ends of the preceding rebar mesh. Moreover, since a body part occupying most parts of the blocking boxes can be separated and withdrawn to be continuously reused for the construction of other panels, economical construction can be possible.

Description

Construction method of continuous underground wall, underground continuous wall with improved constructability, and preceding reinforcing bar network assembly used therefor

The present invention relates to construction technology, and more particularly, to a continuous wall that can be permanently used as an outer wall under a building, a construction method thereof, and a reinforcing bar mesh assembly used therein.

The underground continuous wall is not a temporary facility that is temporarily installed and then demolished for retaining or waterproofing during the construction of the lower foundation of the building, but is a wall intended to be used permanently as an outer wall of the basement floor when the building structure is completed.

1 and 2 show the structure of a conventional underground continuous wall.

1 is a schematic plan view of an area in which an underground continuous wall is to be installed, as viewed from above. Here, the part marked with A is the leading panel part, and the part marked with B is the trailing panel part. When constructing an underground continuous wall, first divide the leading panel part and the trailing panel part so that the leading panel part and the trailing panel part are arranged alternately along the area where the underground outer wall of the building is to be installed.

And the excavation proceeds downward with respect to the preceding panel parts (A1, A2, A3). More specifically, a guide wall (not shown) is installed on the ground surface, and the preceding panel part is excavated to a predetermined depth using an excavator. In this process, in order to prevent the hollow wall formed by excavation from collapsing, a stabilizing solution (usually bentonite solution) for maintaining the hollow wall is injected along with the excavation to fill the excavation part.

When the excavation of the preceding panel part is completed, the reinforcing bar network in which the transverse reinforcing bars (1) and the longitudinal reinforcing bars (2) are interconnected are inserted into the excavation part while the stabilizing solution is filled, and using an injection pipe such as a trami pipe Concrete is poured into the excavation. Since concrete is heavier than the stabilizing solution, the stabilizing solution rises to the top, and the stabilizing solution is pumped and reused. When the filled concrete hardens, a wall is formed. All of the preceding panel parts A1, A2, and A3 may be excavated at the same time, and generally, from A1 to A3 are sequentially performed.

When the construction of the preceding panel unit is completed, excavation and wall forming operations are performed on the trailing panel units B1, B2, and B3 between the preceding panel units. The process is the same as the construction of the preceding panel part. When the construction of the preceding panel part and the following panel part is completed, the continuous wall is completed in the form shown in FIG. 2 .

Such a conventional continuous wall has a problem in structural strength. As described above, since the continuous underground wall makes the trailing panel part after making the leading panel part, the transverse reinforcing bars 1 of the leading panel part and the trailing panel part do not connect to each other as shown in FIG. 2 . Reinforcement-concrete structure is integrated and advantageous in strength when reinforcing bars are connected throughout the continuous wall. In particular, under the condition that seismic design is strengthened as in recent times, the connection of reinforcing bars between panels is emerging as an important issue.

In order to solve this problem, a method of overlapping the reinforcing bars of the leading panel part and the reinforcing bars of the trailing panel part as shown in the portion indicated by D in FIG. 3 is being studied. That is, concrete is first poured and hardened only in the central part except for both ends of the reinforcing bar network of the preceding panel part (A). And, after excavating the trailing panel, concrete is poured while the end of the trailing reinforcing bar network is overlapped with the end of the preceding reinforcing bar network as indicated by D.

When the trailing panel part is excavated in a state where concrete is not poured into the reinforcing bars at both ends, and concrete is poured into the trailing panel part in a state where the reinforcing bars of the trailing panel part and the reinforcing bars of the preceding panel part are overlapped with each other, the form is as shown in FIG. 3 . Concrete was poured in a state where the leading and trailing rebar networks were overlapped with each other, and the reinforcement of the leading and trailing panels was integrated with each other by the concrete, so the strength of the wall was strengthened.

However, there is a problem in that it is technically very difficult to actually implement the above construction method. Reference number g denotes the boundary between the excavation part of the leading panel part and the trailing panel part.

The present invention is to solve the above problems, and the purpose of the present invention is to provide an underground continuous wall with improved structural strength by being buried together in concrete in a state in which the reinforcing bar network of the preceding panel and the reinforcing bar network of the trailing panel are arranged to overlap each other. .

Another object of the present invention is to provide a reinforcing bar network assembly having a unique structure that is embedded inside the underground continuous wall.

Another object of the present invention is to provide a construction method capable of very simply constructing an underground continuous wall using a reinforcing bar network assembly.

On the other hand, other objects not specified in the present invention will be additionally considered within the range that can be easily inferred from the following detailed description and effects thereof.

The preceding reinforcing bar network assembly according to the present invention for achieving the above object is to be included in the preceding panel in the underground continuous wall of a building in which a preceding panel and a succeeding panel are alternately and continuously arranged. The preceding reinforcing bar network assembly includes a preceding reinforcing bar network in which a plurality of transverse reinforcing bars and a plurality of longitudinal reinforcing bars are arranged in a lattice form; and a first area in which the central portion of the preceding reinforcing bar network is disposed and a second area at which both ends of the preceding reinforcing bar network are disposed. It is characterized in that it includes a pair of blocking boxes that prevent the concrete from flowing into the second area when the concrete is poured into the first area by separating them from each other.

According to the present invention, the blocking box acts as a formwork surface when pouring concrete in the central part of the preceding reinforcing bar network, and faces a front plate into which the preceding reinforcing bar network is fitted, and the front plate, but is poured in the center of the preceding reinforcing bar network. After the concrete is hardened, a separation plate is provided to be detachably installed from the front plate so as to open the space in which both ends of the preceding reinforcing bar network are disposed.

In an example of the present invention, the blocking box includes a bottom plate bent from the lower end of the front plate, and a pair of side plates respectively bent from both sides of the front plate, wherein the separation plate includes the It is inserted between a pair of side plates and is detachable. More specifically, an insertion groove is formed on either side of the pair of side plates or both sides of the separation plate along the height direction, and the other of both sides of the pair of side plates or both sides of the separation plate is The side plate and the separating plate can be separated from each other by being inserted into the insertion groove.

In an example of the present invention, at least one of the outer and inner surfaces of the front plate and the upper and lower surfaces of the bottom plate may be formed with a water-repellent film to protrude. In addition, at least a portion of the water-blocking film may have a zigzag cross-section, or irregularities may be formed on at least a portion of the water-repellent film.

In an embodiment of the present invention, a bottom plate formed by bending from the lower end of the front plate is further provided, and the bottom plate is preferably formed to be inclined downward toward both ends from the central part of the preceding reinforcing bar network.

In an example of the present invention, the transverse reinforcing bar of the preceding reinforcing bar network is installed by being inserted into the through hole formed in the blocking box, and is fitted and coupled to the transverse reinforcing bar to further include a sealing member for blocking between the through hole and the transverse reinforcing bar desirable. For example, the sealing member is installed to be inserted into the transverse reinforcing bar in a hollow shape, and has a shape of gradually increasing an outer diameter toward the outside, and may be inserted into the through hole while being fitted in the transverse reinforcing bar. And it is inserted into the transverse reinforcing bar and disposed at the rear end of the sealing member, it may further include a slip prevention member, for example, a nut to prevent the sealing member from being separated from the through hole. And the sealing member and the sliding prevention member by supporting the blocking box, the blocking box by an external force also performs a function of preventing the relative movement along the transverse reinforcing bar.

The underground continuous wall for achieving the object of the present invention, a plurality of preceding panels having a concrete body formed by pouring and hardening between the preceding reinforcing bar network assembly and the pair of blocking boxes described above; and a trailing reinforcing bar network in which transverse reinforcing bars and longitudinal reinforcing bars are interconnected, both ends overlapping with the ends of the preceding reinforcing bar network in the second region adjacent to each other, and the trailing reinforcing bar network and the ends of the preceding reinforcing bar network together It is characterized in that it has a concrete body formed by pouring and hardening so as to be buried, and a plurality of trailing panels disposed between the preceding panels.

The underground continuous wall construction method for achieving another object of the present invention is such that (a) the preceding panel part for excavation construction first and the trailing panel part for excavation construction afterwards are alternately arranged along the area where the continuous wall is constructed. partitioning; (b) After excavating the preceding panel part, and inserting the preceding rebar network assembly according to any one of claims 1 to 10 into the excavated preceding panel part, pouring and curing concrete between the pair of blocking boxes to form a preceding panel; (c) excavating the trailing panel part and separating the outer surface of the blocking box to open the second area; (d) Reinforcing the trailing reinforcing bar network in which the transverse and longitudinal reinforcing bars are interconnected to the excavated trailing panel part, but arranged to overlap with the end of the preceding reinforcing bar network in the second area where the end of the trailing reinforcing bar network is open to do; and (e) forming a trailing panel by pouring and hardening concrete so that the ends of the trailing reinforcing bar network and the preceding reinforcing bar network are buried together.

In the present invention, by forming a continuous wall in a state in which the reinforcing bar network of the preceding panel and the reinforcing bar network of the trailing panel are overlapped with each other, there is an advantage that the structural strength is higher than that of the existing continuous wall. Through this, it is expected that it will be able to be actively used in seismic design, which has become an issue in recent building design.

In particular, the biggest difficulty in the method of constructing the leading and trailing rebar networks in an overlapping state, that is, the problem of dividing and isolating the concrete pouring area, is completely solved through the blocking box, so accurate construction is possible and construction is easy. There is this.

In addition, in the present invention, it is possible to effectively block the inflow of groundwater between the blocking box and the concrete by installing a water-repellent film on the front plate and the bottom plate of the blocking box, respectively.

On the other hand, even if it is an effect not explicitly mentioned herein, it is added that the effects described in the following specification expected by the technical features of the present invention and their potential effects are treated as described in the specification of the present invention.

1 and 2 are diagrams for explaining a conventional underground continuous wall, FIG. 1 is a schematic plan view for explaining a preceding panel part and a following panel part for constructing a continuous wall, and FIG. 2 is a preceding and following panel part This is a schematic cross-sectional view after reinforcing bars and pouring concrete.
3 is a schematic cross-sectional view illustrating a state in which reinforcing bars are mutually overlapped in a conventional underground continuous wall.
4 is a schematic flowchart of a continuous wall construction method according to an example of the present invention.
5 is a schematic perspective view of a prior reinforcing bar network assembly according to an example of the present invention.
6 is a schematic cross-sectional view taken along line AA of FIG. 5 .
7 is a schematic cross-sectional view for explaining a modified example of the blocking box.
8 is a longitudinal cross-sectional view showing the state of the lower end in a state in which the preceding reinforcing bar network assembly is installed underground.
9 and 10 are views for explaining two types of sealing members.
11 to 14 are views for explaining the method according to the present invention.
※ It is revealed that the accompanying drawings are exemplified as a reference for understanding the technical idea of the present invention, and the scope of the present invention is not limited thereby.

In the description of the present invention, if it is determined that related known functions are obvious to those skilled in the art and may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

The present invention relates to an underground outer wall of an underground building, that is, an underground continuous wall structure and a method for constructing the same. The underground continuous wall is intended to be used as a permanent wall rather than a temporary facility to be removed after being temporarily used as an earth wall or a barrier wall during excavation construction.

Hereinafter, with reference to the accompanying drawings, the prior rebar mesh assembly according to an example of the present invention will be first described, and then the configuration of the underground continuous wall using the same and the construction method thereof will be described in detail.

The preceding reinforcing bar network assembly according to an embodiment of the present invention is shown in FIGS. 5 to 8 .

FIG. 5 is a schematic perspective view of the preceding reinforcing bar network assembly, FIG. 6 is a schematic cross-sectional view taken along line A-A of FIG. 5, and FIG. 8 is a longitudinal sectional view showing the lower end of the preceding reinforcing bar network assembly installed underground.

5 to 8 , the preceding reinforcing bar network assembly 50 according to an embodiment of the present invention includes a preceding reinforcing bar network 10 and a blocking box 20 .

The preceding reinforcing bar network 10 is integrally formed by interconnecting a plurality of transverse reinforcing bars 11 and longitudinal reinforcing bars 12 in a lattice form. In this example, both the transverse reinforcing bars 11 and the longitudinal reinforcing bars 12 may use a deformed reinforcing bar.

A blocking box 20 is installed at both ends of the preceding reinforcing bar network 10 , respectively.

The blocking box 20 performs two functions. The first function is the formwork function. That is, when pouring concrete into the preceding panel, the boundary of both sides is determined. The excavated space of the preceding panel part can be divided into a first area D1 and a second area D2, and the first area D1 is the central part of the preceding reinforcing bar network 10 and is between the two blocking boxes 20. space (area) of That is, the area where the concrete is poured first. And the second area D2 is an area (space) in which both ends of the preceding reinforcing bar network 10 are disposed, and is an area poured together when pouring concrete into the trailing panel part. As will be described later, both ends of the preceding reinforcing bar network 10 are respectively fitted into the blocking box 20 and arranged in the isolated space 21 inside the blocking box 20, and this space forms the second area. The second function of the blocking box 20 is to completely block the second area from the first area. This is to prevent concrete from flowing into the second area when pouring concrete into the first area.

The blocking box 20 for performing the above two functions is made of a steel material and is elongated along the height direction of the preceding reinforcing bar network 10 . The blocking box 20 is formed in the form of a long box up and down, and a front plate 22, a pair of side plates 23 bent and extended from both sides of the front plate 22, and the front plate 22 and a bottom plate 24 that is bent and extended from the bottom. The front plate 22 , the bottom plate 24 , and the pair of side plates 23 may be integrally formed or may be formed by bonding such as welding.

In particular, the bottom plate 24 is preferably formed to be inclined downward toward both ends from the central portion of the transverse reinforcing bar 11 as shown in FIG. 8 . This will be explained again when the construction method is explained.

And on the surface facing the front plate 22, a separating plate 25 is installed between a pair of side plates 23, and the separating plate 25 is detachably coupled to/separable from the blocking box 20. . In this example, as shown in FIG. 6 , long insertion groove portions 23a are formed in the side plate 23 in the vertical direction, and insertion portions 25a are formed on both sides of the separation plate 25 , and the insertion portion ( 25a) is inserted into the insertion groove portion 23a, the separation plate 25 is coupled to the pair of side plates (23). A rubber packing (not shown) or the like is interposed in the insertion groove portion 25a so that the separation plate 25 is press-fitted into the insertion groove portion 25a. However, since the separating plate 25 will be removed later, it is not preferable that the separating plate is strongly coupled to the blocking box. There are various ways of coupling the separation plate to the blocking box, and as shown in FIG. 7 , in another example of the present invention, the insertion groove portion 23b may be installed to face each other on the inside of the side plate 23 .

After the blocking box 20 is seated on the excavated preceding panel portion, the separation plate 25 is raised using a crane or the like to separate and take out from the blocking box 20 . When the separation plate 25 is taken out, the outer surface of the blocking box 20 is removed to open the second region D2. For reference, since the rubber packing remains in the insertion groove 25a even if the separation plate is separated from the blocking box and taken out, it can perform the same functions as the water-repellent membranes 41 and 42 to be described later when the continuous wall is completed.

The front plate 22 of the blocking box 20 forms an outer boundary surface of the first area D1, and acts as a formwork surface when concrete is poured into the first area. A plurality of through-holes 26 are formed in the front plate 22 , and transverse reinforcing bars 11 are fitted into these through-holes 26 , respectively. Between the inner circumferential surface of the through hole and the transverse reinforcing bar 11, a water expander or the like is applied to completely seal the gap. In addition, a sealing member may be installed in the through hole 26 . The sealing member blocks between the through hole 26 and the transverse reinforcing bar 11, and prevents concrete from flowing into this gap.

In this example, the sealing member 30 has a shape in which the outer diameter gradually increases from one side to the other, such as a cone shape or a truncated cone shape, and a hollow sealing member 30 that can be fitted and coupled to the transverse reinforcing bar 11 is used. . 9 is a schematic perspective view of the sealing member. In this example, the sealing member 30 is formed in a truncated cone shape with a compressible material such as rubber, fitted to the transverse reinforcing bar 11 , and inserted into the through hole 26 . That is, the sealing member 30 is compressed between the transverse reinforcement 11 and the inner peripheral surface of the through hole 26 . The sealing member 30 may be fitted from the end of the reinforcing bar, and as in this example, one side is completely formed with a cut line 31 , so it may be inserted into the transverse reinforcing bar 11 through the cut line 31 . As shown by the arrow in FIG. 9 , after the sealing member 30 is spread on both sides of the incision line 31 , it can be inserted into the transverse reinforcing bar 11 . Or, as in the example shown in FIG. 10, when inserting the sealing member 35 from the end of the transverse reinforcing bar 10, a plurality of incision lines 36 are formed at the distal end for easy insertion so that the distal end can be easily opened. you can also make it

In addition, the rear end of the sealing member 30 may be provided with a sliding prevention member as shown in FIG. The anti-skid member is inserted into the transverse reinforcing bar to support the sealing member. More fundamentally, the anti-skid member is to enable the blocking box to be firmly coupled to the transverse reinforcing bar. Even if there is no sealing member, it is inserted into the transverse reinforcing bar to prevent the blocking box from moving along the transverse reinforcing bar.

As will be described later, when the preceding reinforcing bar network assembly 50 is installed in the excavated ground of the preceding panel part, concrete is poured into the first area D1 between the blocking boxes 20 on both sides. At this time, due to the weight of the concrete, the blocking boxes 20 on both sides may be pushed out in a mutually spaced direction. Even if it is not the weight of the concrete, there may be such a relative movement even in the process of seating the preceding reinforcing bar network assembly 50 in the ground.

In order to prevent this, in this embodiment, the nut 38 may be used as an anti-slip member. In this example, since the transverse reinforcing bar uses a deformed reinforcing bar with irregularities formed on the outer circumferential surface, if the sealing member 30 is supported by inserting the nut 38 into the reinforcing bar, the sealing member 30 is prevented from being separated from the through hole. In addition, it is possible to prevent the blocking box 20 from being pushed. When the coupling force between the transverse reinforcing bar 11 and the blocking box 20 is increased using the sealing member 30 and the nut 38 in this way, it is possible to prevent the blocking box 20 from being pushed separately. In addition to the nut, the anti-skid member may be inserted into the transverse reinforcing bar to use another member capable of supporting the blocking box.

On the other hand, in the preceding reinforcing bar network assembly 50 according to an example of the present invention, the water-repellent membranes 41 and 42 may be installed on at least one of the outer surface and the inner surface of the front plate 22 . It is preferable to be installed on both sides. Similarly, the water-repellent film 41 is provided on at least one of the upper and lower surfaces of the bottom plate 24 , preferably on both surfaces. The water stop membranes 41 and 42 are for preventing the inflow of underground water, rainwater, etc. from the outside of the building into the inside of the building along the front plate or the floor plate after the continuous wall is completed. Since the blocking box and concrete are of different materials, they cannot be completely combined, so groundwater or rainwater may flow in between the blocking box and the concrete. When the water stop membranes 41 and 42 are installed to block the inflow path of groundwater, the inflow of groundwater can be blocked.

The water-blocking films 41 and 42 are formed to protrude from the outer and inner surfaces of the front plate 22 in a long band shape and are formed over the entire height of the front plate 22 . Similarly, as shown in FIG. 8, the water stop film 42 is formed to protrude from the upper and/or lower surface of the bottom plate 24, and is formed over the entire width direction (longitudinal direction of the transverse reinforcement) of the bottom plate 24. do.

The water-repellent films 41 and 42 are made of steel and can be coupled to the blocking box by welding or the like. When making a barrier box in a factory, a water-repellent film can be installed together. Alternatively, the water-repellent film can be directly attached at the construction site. For example, the water-repellent film may be directly attached to the blocking box using a gel material. Although the water-repellent film is in a gel state, a material capable of maintaining its original shape even when concrete is poured is used.

Referring to FIG. 6 , the water stop film 41 coupled to the front surface of the front plate 41 is formed in a zigzag cross-section, and the water stop film 42 coupled to the rear surface is formed in a straight shape. This is to increase the bonding force between the concrete and the blocking box 20 to prevent the movement of the blocking box 20 when the separation plate 25 is removed from the blocking box 20 . There is another example in FIG. 7 , and since the water-repellent film 43 shown in FIG. 7 has irregularities 43 formed on both sides, the bonding force with concrete can be increased.

Hereinafter, a method for constructing an underground continuous wall using the preceding reinforcing bar network assembly having the above configuration and a structure thereof will be described.

4 is a schematic flowchart of a method for constructing an underground continuous wall according to an embodiment of the present invention.

Referring to FIG. 4 , in the underground continuous wall construction method according to an embodiment of the present invention, the continuous wall is first divided into a leading panel part and a trailing panel part along an area (the circumferential direction of the building structure) where the continuous wall is to be installed. The division of the leading panel part and the trailing panel part is the same as shown in FIG. 1 . That is, the preceding panel portions A1, A2, and A3 and the trailing panel portions B1, B2, B3 are alternately arranged. As shown in FIG. 1 , the length of the preceding panel is generally longer than the length of the following panel.

After division, the preceding panel part is first excavated. Among the plurality of preceding panel units, distant preceding panel units may be excavated together or may be excavated sequentially. However, excavating adjacent preceding panels together is not desirable for equipment operation or maintenance of empty walls. When the preceding panel part is excavated downward, the hollow wall is prevented from collapsing by injecting and filling the bentonite solution stabilizing solution into the excavation part from which the soil has been discharged. After excavating the preceding panel to the design depth, the preceding reinforcing bar network assembly 50 according to the present invention is inserted into the excavated part filled with the stabilizing liquid. At this time, the separation plate 25 of the preceding reinforcing bar network assembly 50 is coupled to the blocking box 20 . When the rooting of the preceding reinforcing bar network assembly 50 is completed, the first region and the second region of the excavation unit are in a state of being isolated from each other. The first region D1 between the pair of blocking boxes 20 is filled with bentonite stabilizing solution, and the second region D2, which is the inner space of the blocking box 20, is a via where the end of the transverse reinforcing bar 11 is inserted. empty state. Since the blocking box 20 has a sealed bottom, the stabilizing solution does not flow into the space 21 inside the blocking box.

In the above state, as shown in FIG. 8 , concrete (C) is poured in the first area (D1) while pulling up the trammy pipe (T) from the lower part to the upper part. Since the stabilizer is lighter than concrete, when concrete is poured, it is pushed upward and discharged to the outside through pumping. When the concrete C filled between the pair of blocking boxes 20 is hardened, the preceding panel 100 is completed as shown in FIG. 11 .

One important point here is that the bottom plate 24 of the blocking box 20 is inclined. As shown by the dotted line in FIG. 8, if the bottom plate of the blocking box 20 is horizontally arranged, when pouring concrete while raising the trammy pipe (T), the bottom plate 24 Concrete may not be completely filled. If the concrete hardens in this state, there may be a big problem in the strength of the wall. Accordingly, in the present invention, the bottom plate of the blocking box is formed to be inclined downward toward the outside so that there is no empty space in the continuous wall and the concrete can be tightly filled.

When the leading panel 100 is completed, the trailing panel part B is now excavated. The trailing panel part B is also excavated while injecting the stabilizing liquid like the preceding panel part. Since the excavation process is the same as that of the preceding panel part, a detailed description thereof will be omitted. After the excavation is completed, when the separation plate 25 is removed from the blocking box 20 using a crane (not shown), the state is as shown in FIG. 12 . That is, as the second region D2 of the preceding panel part A is opened, the excavation part of the trailing panel part B is integrated to form one space. For reference, the separator 25 is recycled when constructing other panels. Meanwhile, in the present invention, at least a part of the water-repellent film 41 installed on the front plate 22 and embedded in the concrete C of the preceding panel 100 has a zigzag shape or irregularities are formed as described above. This prevents the blocking box 20 from moving when the separation plate 25 is separated from the blocking box 20 . That is, when the separation plate 25 is lifted up or pushed aside and lifted, the blocking box can move together, and the zigzag or uneven portion of the water-repellent film is buried in the concrete to increase the bonding force between the blocking box and the concrete. will be. If the water-repellent membrane is in a zigzag or uneven shape rather than in a straight line, the bonding strength with concrete is further strengthened.

After excavation of the trailing panel, a trailing reinforcing bar network in which a plurality of transverse reinforcing bars 61 and longitudinal reinforcing bars 62 are formed in a lattice form is inserted into the excavation part. When reinforcing the trailing reinforcement network 60 , both ends of the trailing reinforcement network 60 are disposed to overlap with the ends of the preceding reinforcement network 10 as shown in FIG. 13 . That is, in the area inside the blocking box 20, the leading reinforcing bar network 10 and the trailing reinforcing bar network 60 overlap each other.

When the rooting of the trailing reinforcing bar network 60 is completed, concrete is poured (C) and hardened in the excavated part to complete the trailing panel 200 . When both the leading panel 100 and the trailing panel 200 are completed, 'head cleaning' is performed and the construction of the continuous wall 300 is completed. The completed continuous wall is as shown in FIG. 14 .

That is, in the underground continuous wall 300, the leading panel 100 and the trailing panel 200 are alternately arranged, and in the interior of the leading panel 100 and the trailing panel 200, the leading rebar network 10 and the trailing reinforcing bar, respectively. The mesh 60 is reinforced, and the concrete C is hardened.

As described above, the blocking box 20 is used in the preceding reinforcing bar network assembly 50 according to the present invention, which is a second region where both ends of the preceding reinforcing bar network are disposed when the preceding panel 100 is made by pouring concrete. This is to prevent concrete from flowing into (D2). That is, the blocking box 20 seals and isolates the second region D2. As described above, both ends of the preceding reinforcing bar network 10 should be reinforced in an overlapping state with the ends of the trailing reinforcing bar network 60 . However, if the concrete poured for the preceding panel flows into the second region D2 and hardens, it is difficult because the trailing reinforcing bar network 60 cannot be overlapped with the end of the preceding reinforcing bar network 10 . In the present invention, when concrete is poured on the preceding panel by using a completely sealed structure called a blocking box, the inflow of concrete into the second area D2 is fundamentally blocked.

As described above, in the present invention, by forming a continuous wall in a state in which the reinforcing bar network of the preceding panel and the reinforcing bar network of the trailing panel are overlapped with each other, there is an advantage in that the structural strength is higher than that of the existing continuous wall. Through this, it is expected that it will be able to be actively used in seismic design, which has become an issue in recent building design.

In particular, in the present invention, the biggest difficulty in the method of constructing the preceding rebar network and the trailing rebar network in an overlapping state, that is, the problem of dividing and isolating the concrete pouring area, is completely solved through the blocking box, so that accurate construction is possible and construction This has the advantage of being easy.

In addition, in the present invention, it is possible to effectively block the inflow of groundwater between the blocking box and the concrete by installing a water-repellent film on the front plate and the bottom plate of the blocking box, respectively.

The protection scope of the present invention is not limited to the description and expression of the embodiments explicitly described above. In addition, it is added once again that the protection scope of the present invention cannot be limited due to obvious changes or substitutions in the technical field to which the present invention pertains.

300 ... underground continuous wall, 100 ... leading panel, 200 ... trailing panel
10 ... preceding reinforcing bars, 11 ... transverse reinforcing bars, 12 ... longitudinal reinforcing bars
20 ... blocking box, 21 ... space part, 22 ... front plate, 23 ... side plate,
24 ... base plate, 25 ... separator plate, 30 ... sealing member, 38 ... nut
41, 42 ... waterproof membrane, 50 ... advance rebar mesh assembly
60 ... trailing reinforcing bar network, 61 ... transverse reinforcing bar, 62 ... longitudinal rebar
A ... leading panel part, B ... trailing panel part, C ... concrete

Claims (13)

As included in the preceding panel in the underground continuous wall of a building formed by alternately and continuously arranged leading and trailing panels,
a preceding reinforcing bar network in which a plurality of transverse reinforcing bars and a plurality of longitudinal reinforcing bars are arranged in a grid form; and
It is installed by being fitted to both ends of the preceding reinforcing bar network, and an isolated space is formed therein, so that the first area in which the central portion of the preceding reinforcing bar network is disposed and the second area in which both ends of the preceding reinforcing bar network are disposed are mutually A pair of blocking boxes for preventing concrete from flowing into the second area when pouring concrete into the first area by separating it; According to claim 1,
The blocking box is
When concrete is poured in the central part of the preceding reinforcing bar network, the front plate acts as a formwork surface and into which the preceding reinforcing bar network is inserted, and the preceding reinforcing bar network faces the front plate, but after the concrete poured in the central part of the preceding rebar network is hardened The preceding reinforcing bar network assembly, characterized in that it comprises a separating plate that is detachably installed from the front plate to open the space portion where both ends of the disposed. 3. The method of claim 2,
The blocking box
A bottom plate formed by bending from the lower end of the front plate, and a pair of side plates respectively bent from both sides of the front plate,
The separation plate is sandwiched between the pair of side plates, the prior reinforcing bar network assembly, characterized in that detachably coupled. 4. The method of claim 3,
Insertion grooves are formed in either both sides of the pair of side plates or both sides of the separation plate along the height direction, and the other of both sides of the pair of side plates or both sides of the separation plate is in the insertion groove portion. Prior reinforcing bar network assembly, characterized in that the side plate and the separation plate are coupled to each other separably by being fitted. 4. The method of claim 3,
The preceding reinforcing bar network assembly, characterized in that at least one of the outer and inner surfaces of the front plate and the upper and lower surfaces of the bottom plate is formed to have a water repellent film protruding. 6. The method of claim 5,
At least a portion of the water-resistant film is formed in a zigzag shape in cross section,
Or at least a portion of the water-resistant membrane is a prior reinforcing bar network assembly, characterized in that the unevenness is formed. 6. The method of claim 5,
The prior reinforcing bar network assembly, characterized in that the water-resistant membrane is in a gel state. 3. The method of claim 2,
Further comprising a bottom plate bent from the lower end of the front plate,
The bottom plate is a preceding reinforcing bar network assembly, characterized in that it is formed to be inclined downward toward both ends from the central portion of the preceding reinforcing bar network. According to claim 1,
The transverse reinforcing bar of the preceding reinforcing bar network is installed by being fitted into the through hole formed in the blocking box, and further comprising a sealing member for sealing between the transverse reinforcing bar and the through hole. 10. The method of claim 9,
The sealing member is installed by being inserted into the transverse reinforcing bar in a hollow shape, and has an outer diameter gradually increasing toward the outside, and is inserted into the through hole while being inserted into the transverse reinforcing bar. 11. The method of claim 10,
The preceding reinforcing bar network assembly, characterized in that it is fitted in the transverse reinforcing bar and installed at the rear end of the sealing member, further comprising a nut for preventing the sealing member from being separated from the through hole. As a wall forming the basement outer wall of a building,
A plurality of preceding panels having a concrete body cast and hardened between the preceding reinforcing bar network assembly according to any one of claims 1 to 11 and the pair of blocking boxes; and
A trailing reinforcing bar network in which transverse reinforcing bars and longitudinal reinforcing bars are interconnected, both ends overlapping with the ends of the preceding reinforcing bar network in the second region adjacent to each other, and the ends of the trailing reinforcing bar network and the preceding reinforcing bar network are buried together A continuous underground wall comprising a concrete body formed by pouring and hardening as much as possible, and a plurality of trailing panels disposed between the preceding panels. (a) partitioning so that the preceding panel part for excavation construction first and the trailing panel part for excavation construction afterwards are alternately arranged along the area where the continuous wall is constructed;
(b) After excavating the preceding panel part, and inserting the preceding rebar network assembly according to any one of claims 1 to 11 into the excavated preceding panel part, pouring and curing concrete between the pair of blocking boxes to form a preceding panel;
(c) excavating the trailing panel part and separating the outer surface of the blocking box to open the second area;
(d) Reinforcing the trailing reinforcing bar network in which the transverse and longitudinal reinforcing bars are interconnected to the excavated trailing panel part, but arranged to overlap with the end of the preceding reinforcing bar network in the second area where the end of the trailing reinforcing bar network is open to do;
(e) forming a trailing panel by pouring and hardening concrete so that the ends of the trailing reinforcing bar network and the preceding reinforcing bar network are buried together;

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