KR20220140159A - Protector structure, protector structure assembly and method for slurry wall construction using the same - Google Patents

Abstract

The present invention relates to a protector structure for lap joint of reinforcing bars of a slurry wall. According to the present invention, the protector structure is inserted into an excavation unit excavated downward to build a slurry wall having an outer wall body in a basement floor of a building since a front panel and a rear panel of a reinforced concrete structure are continuously arranged. The protector structure includes: a blocking box formed to be lengthwise in the vertical direction and including a front plate, a pair of side plates individually extended from both side ends of the front plate, and a rear plate having a rail unit in the vertical direction and connected between the pair of side plates; and a removing unit installed in the rail unit, and including a binding member and a drawing line. The binding member can move in the vertical direction of the blocking box along the rail unit. One end of the drawing line is connected to the binding member, and the other end of the drawing line is connected to a driving unit. When the driving unit installed on the outer side of the blocking box operates and applies power in a transverse direction, the blocking box is removed by being pulled toward the driving unit by the removing unit. The purpose of the present invention is to provide the protector structure for constructing a slurry wall, capable of being easily separated after the concrete is cured.

Description

Protector structure and assembly for underground continuous wall construction, and construction method of underground continuous wall using the same

The present invention relates to construction technology, and more particularly, to a continuous wall construction method that is permanently used as an outer wall under a building, and a protector structure used in the construction method.

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.

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 portion indicated by A is the leading panel portion, and the portion indicated by B is the trailing panel portion. 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 alternately arranged 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 the 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 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 section 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 is pushed up to the top, and it 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 simultaneously or sequentially.

When the construction of the preceding panel unit is completed, excavation and wall formation 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 .

Recently, in order to strengthen the structural strength of the continuous wall, a method of overlapping the transverse reinforcing bars of the leading panel part and the trailing panel part as shown in the portion D of FIG. 3 has been attempted. Among the reinforcing bars of the preceding panel part (A), concrete is first poured and hardened only in the central part except for both ends. 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.

For this, both ends of the preceding reinforcing bar network are covered with a protector structure, etc. to block and isolate, and pour concrete only on the central part of the preceding panel for curing. When the concrete is cured, the trailing panel is excavated and the protector structure is separated to expose both ends of the leading rebar network. In a state where both ends of the preceding rebar network are exposed, the trailing reinforcing bar network is inserted into the trailing panel portion, but the ends of the preceding rebar network and the trailing reinforcing bar network are arranged to overlap each other. In this state, when concrete is poured into the trailing panel part, the form is as shown in FIG. 3 . Concrete was poured while the preceding and trailing reinforcing bar networks were overlapped with each other, and the reinforcing bars of the leading and trailing panels were 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. When pouring concrete to the leading panel, a separate protector structure should be installed to prevent concrete from being poured at both ends of the leading rebar network. When pouring concrete to the trailing panel, the protector structure should be removed and separated. In particular, there is a problem that it is not easy to remove the protector structure.

For reference, 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 to provide a protector structure and a protector structure assembly that are installed on both sides of the preceding panel when the preceding panel is built in an underground continuous wall and can be very easily removed after the concrete of the preceding panel is cured. There is a purpose.

Another object of the present invention is to provide a continuous wall construction method using the above-described protector structure.

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

The protector structure according to the present invention for achieving the above object is an excavation part excavated downward to construct an underground continuous wall in which the leading panel and the trailing panel of the reinforced concrete structure are continuously arranged to form the outer wall of the basement of the building. As being inserted, it is formed long in the vertical direction, and is coupled between a front plate, a pair of side plates respectively extending from both ends of the front plate, and the pair of side plates, and a rail unit along the vertical direction. a blocking box having a rear plate formed thereon; and a binding member installed on the rail part and movable in the vertical direction of the blocking box along the rail part, a lifting unit for moving the binding member in the vertical direction, one end connected to the binding member and the other end driven Including; removal means having a traction line connected to the unit; when the driving unit installed on the outside of the blocking box operates and applies a force in the lateral direction, the blocking box is pulled toward the driving unit by the removal means and removed is characterized by

In one embodiment of the present invention, the rail portion is a slit cut in the vertical direction on the rear plate of the blocking box, and the binding member is disposed on the front surface of the rear plate and formed to a size to prevent separation through the slit. a flange portion to be a flange portion, a connecting rod extending from the flange portion and fitted into the slit, and a coupling portion disposed on the rear surface of the rear plate and coupled to the traction line, when the traction line is pulled, the flange portion crosses the blocking box pull in the direction

On the other hand, the protector structure assembly according to the present invention is made of the above configuration, a pair of protector structures installed on both sides of the ground excavation; and a drive unit installed between the pair of protector structures and connected to each traction line of the pair of protector structures. It is characterized by being pulled and removed.

On the other hand, in the underground continuous wall construction method for achieving another object of the present invention, (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 as much as possible; (b) excavating the preceding panel portions disposed on both sides with the trailing panel portion interposed therebetween, inserting a preceding reinforcing bar network in which transverse and longitudinal reinforcing bars are interconnected to the preceding panel portion, and forming the protector structure of the above configuration Reinforcing each on both sides of a pair of preceding reinforcing bar networks; (c) forming a preceding panel by pouring and hardening concrete between the protector structures disposed on both sides of the preceding panel unit; (d) excavating the trailing panel portion disposed between the preceding panels, installing a driving unit between a pair of preceding panels, and attaching a traction line of the protector structure that is in close contact with the pair of leading panels to the driving unit connecting to; (e) the blocking box is removed from the preceding panel by operating the driving unit and pulling the blocking box, and the binding member sequentially removes the blocking box while moving from the lower side to the upper side of the blocking box, taking out the blocking box from the trailing panel unit; and (f) forming the trailing panel by inserting the trailing reinforcement network in which the transverse reinforcement and the vertical reinforcement are interconnected to the excavated trailing panel part, and pouring and hardening concrete to form the trailing panel.

The protector structure according to the present invention can be used for installing reinforcing bars and water stop plates when constructing an underground continuous wall. The blocking box of the present protector structure is installed in close contact with the preceding panel to assist in the construction of the preceding panel, and has the advantage that it can be very easily separated from the preceding panel by a removal means after the preceding panel is completed.

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 views 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 perspective view of a protector structure and assembly according to an example of the present invention.
5 is a schematic cross-sectional view taken along line AA of FIG. 4 .
Figure 6 is a schematic longitudinal cross-sectional view of Figure 4, for explaining the removal process of the protector structure.
7 and 8 are for explaining the removal process of the protector structure described in FIG. 6 in cross-sectional views.
※ 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 the subject matter of the present invention may be unnecessarily obscured as it is obvious to those skilled in the art with respect to related known functions, the detailed description will be omitted.

The protector structure that is the object of the present invention can be used for various purposes as it is used to construct an underground continuous wall. First, when pouring concrete into the preceding panel, it functions as a formwork on both sides. In a continuous wall, the wall is divided regardless of whether it is overlapped or not. It is installed on both sides of the excavated area and functions as a formwork when pouring concrete. It can also be used as a structure for the reinforcing bar joint of the leading panel and the trailing panel. In this case, lap joint reinforcing bars overlapping each of the preceding and trailing reinforcing bars may be installed in the protector structure. This part will be explained again later. In addition, it can be used as a structure for installing the water stop plate at the construction joint between the leading panel and the trailing panel. A water stop is formed long in the vertical direction, and one side in the width direction is embedded in the leading panel and the other side is embedded in the trailing panel, respectively, to block between the construction joints. A protector structure may be used to install the stop plate.

That is, since the functions of the protector structure are various as described above, the protector structure in the present invention is not limited to performing any one function. However, in the following description, a structure (including a formwork function) for the reinforcing bar lamination function will be described as an example.

Hereinafter, with reference to the accompanying drawings, the protector structure and assembly according to an embodiment of the present invention will be first described, and then the construction method of the underground continuous wall using the protector structure will be described in detail.

4 is a schematic perspective view of a protector structure and assembly according to an example of the present invention, FIG. 5 is a schematic cross-sectional view taken along line A-A of FIG. 4, and FIG. 6 is a schematic longitudinal cross-sectional view of FIG. 4, to explain the removal process of the protector structure it is for

Referring to the drawings, the protector structure 100 according to an example of the present invention is inserted into an excavation part excavated downward to construct an underground continuous wall and includes a blocking box 10 and a removal means.

The blocking box 10 is formed long in the vertical direction, the front plate 11, a pair of side plates 12 bent and extended from both sides of the front plate 11, and from the lower portion of the front plate 11 and a bottom plate 14 that is bent to block the lower opening. Also, on the surface facing the front plate 11 , the rear plate 13 is coupled between the pair of side plates 12 . Accordingly, an isolated space (the upper side may be opened) is formed inside the blocking box 10 .

The front plate 11 has two parallel through-holes 15 as a pair, and a plurality of sets of through-holes 15 are formed at regular intervals along the vertical direction. The side plate 12 is formed to be slightly inclined outward from the front plate 11 . The bottom plate 14 is inclined downward as it goes away from the front plate 11 . Of course, in another example, the side plate and the bottom plate may not be arranged to be inclined, or a rectangular parallelepiped shape may be formed as a whole.

The rear plate 13 of the blocking box 10 is provided with a long rail portion in the vertical direction, and the rail portion may adopt various shapes. In this example, the rail unit adopts a slit 16 cut lengthwise in the vertical direction at the center of the rear plate 13, and in another example, a different configuration may be selected. On the front side of the rear plate 13, the slit 16 is wrapped around the slit 16 to form a long vertical groove (17, channel) therein, a roughly 'C'-shaped angular pipe 18 is coupled. The slit 16 and the groove 17 will be described again together with the removal means.

On the other hand, in this example, the protector structure is used for the reinforcing bar of the continuous underground wall, and in this example, the reinforcing bar 20 is installed in the blocking box 10 . The reinforcing bar 20 is installed by being inserted into the through hole 15 of the front plate 11 . When the reinforcing bar 20 is inserted into the through hole 15 , as shown in FIG. 5 , one side 21 protrudes to the outside of the blocking box 10 , and the other side 22 is inside the blocking box 10 . is inserted The lengths of the protruding portion and the inserted portion are approximately the same. In the continuous wall, one side 21 of the reinforcing bar 20 is embedded in the concrete in a state of overlapping with the reinforcing bar network of the preceding panel, and the other side 22 is buried in the concrete while overlapping with the reinforcing bar network of the succeeding panel. That is, both sides of the reinforcing bar 20 are overlapped with the reinforcing bar network of the preceding panel and the following panel, respectively, resulting in a structural effect that the reinforcing bar networks of the preceding panel and the following panel are mutually overlapped as a whole. In this example, the lap joint reinforcing bars are shown to be formed in a 'C' shape, but two '1' shaped reinforcing bars independent of each other without a connection part may be used.

On the other hand, the removal means is for mutually separating the blocking box (10) and the reinforcing bar (20). In this example, the removal means includes a binding member 30 and a traction line 40 , and the removal means is driven by the driving unit 50 .

The binding member 30 includes a flange portion 31 , a connecting rod 32 , and a coupling portion 33 inserted into the groove portion 17 formed in the rear plate 13 of the blocking box 10 . The flange portion 31 is formed in a substantially plate-shaped width that does not pass through the slit 16 and is movable in the vertical direction within the groove portion 17 . The connecting rod 32 is formed extending from the flange portion 31 to the outside through the slit 17 . The coupling portion 33 is formed at the end of the connecting rod 32 and is a portion coupled to the traction line 40 to be described later, and in this example, it may be formed in a ring shape. Since the binding member is connected to a traction line to be described later, the drive unit-can be moved in the vertical direction together with the traction line, but in another example of the present invention, a separate lifting unit for moving the binding member 30 may be provided. In this example, the lifting unit may use a winch (not shown) on which the wire 37 is wound. The wire 37 released from the winch is connected to the binding member 30, so that the binding member 30 can move up and down by the operation of the winch.

One end of the traction line 40 is connected to the coupling part 33 of the binding member 30 as mentioned above, and the other end is connected to the driving unit 50 to be described later. The driving unit 50 is for pulling the traction line 40 to separate the blocking box 10 that is in close contact with the preceding panel. In this example, as the blocking box 10 is removed, it is mutually separated from the reinforcing bar 20 . The driving unit 50 may employ various means such as a motor and a cylinder. In this example, the driving unit 50 is connected to a rope 51 (including an electric cable) on the upper portion and can be moved in the vertical direction.

As shown in FIG. 4 , in the protector structure assembly according to the present invention, the driving unit 50 is disposed between a pair of protector structures 100 . In a state in which the preceding panels are already completed on both sides, the trailing panel part is excavated between them, and the driving unit 50 is disposed. Pull and remove the protector structure 100 installed on each side of the front panel on both sides. In order for the driving unit 50 to apply a force to pull the blocking box, a reaction force is required. In this example, the driving unit 50 pulls both the blocking boxes between a pair of blocking boxes, so the force acts in the opposite direction. The blocking boxes arranged on the opposite side each act as a reaction force.

Hereinafter, a method of constructing an underground continuous wall using the protector structure 100 having the above configuration will be described with reference to the drawings.

As described in the prior art, first, the leading panel part (A) and the trailing panel part (B) are alternately partitioned along the area where the underground continuous wall is to be made, and the preceding panel part (A) is first excavated. After excavating the preceding panel unit, the preceding reinforcing bar network 60 made of the transverse reinforcing bars 61 and the longitudinal reinforcing bars 62 is inserted into the excavated preceding panel unit.

After reinforcing the preceding reinforcing bar network 60 into the preceding panel part A, the protector structures 100 of the above-described structure are inserted on both sides of the preceding reinforcing bar network, respectively. However, in the protector structure, the removal means such as the binding member and the traction line are separated. That is, only the blocking box is installed in the protector structure. At this time, the reinforcing bars 20 of the protector structure 100 are arranged to overlap each other with the transverse reinforcing bars 61 of the preceding reinforcing bar network. In this way, in a state in which the reinforcing bars 20 of the protector structure 100 and the transverse reinforcing bars 611 of the preceding reinforcing bar network are overlapped with each other, the concrete c is poured and hardened between the protector structures 100 on both sides of the preceding panel (P). ) is completed. One side of a cross-sectional view of the completed preceding panel P is shown in FIG. 7 . The other side of the preceding panel is formed symmetrically.

When the adjacent preceding panels P with the trailing panel part B interposed therebetween are each completed, after excavating the trailing panel part B, the removal means and the driving unit 50 are located in the excavated area as shown in FIG. 6 . ) is installed. The binding member 30 of each protector structure 100 is disposed in the lower part as shown in FIG. 6 , and the driving unit 50 is also disposed in the lower part corresponding thereto. The driving unit 50 and the binding member 30 are respectively connected to each other with the traction line 40 .

When the driving unit 50 is operated in the above state, the driving unit 50 pulls the traction lines 40 on both sides at the same time, and the flange part 31 of the binding member 30 pulls the blocking box 10 and blocks it. The box 10 is removed. As the blocking box 10 is removed from the preceding panel P, the reinforcing bar 20 and the blocking box 10 are also separated from each other. Since it is difficult to remove the blocking box 10 by one operation, the blocking box 10 while moving the driving unit 50 and the binding member 30 from the lower part to the upper part as shown by the imaginary line in FIG. 6 . ) to remove it.

The state in which the blocking box 10 is finally removed is shown in FIG. 8 . When the blocking box 10 is removed from the state of FIG. 7, it becomes the state of FIG. In the state of FIG. 8, if the blocking box 10 is taken out to the ground using a crane or the like, it becomes the state of FIG.

When the blocking box 10 is removed, as shown in FIG. 8 , the other side 22 of the reinforcing bar 20 is exposed toward the trailing panel part B. As shown in FIG. In this state, the trailing reinforcing bar network is inserted into the trailing panel part (B). As with the trailing reinforcing bar network and the preceding reinforcing bar network, longitudinal reinforcing bars consisting of transverse reinforcing bars 311 and 312 and a trailing reinforcing bar network (not shown) in which the transverse reinforcing bars are arranged in a lattice form are inserted into the trailing panel part (B). . Also at this time, the transverse reinforcing bars of the trailing reinforcing bar network are disposed to overlap with the other side 22 of the lap joint reinforcing bar 20 . Concrete is poured and hardened in the state where the reinforcing bars are overlapped in this way to complete the trailing panel (not shown).

In other words, the underground continuous wall has a structure in which leading and trailing panels are alternately arranged, and reinforcing bars are interposed therebetween. One side of the reinforcing bars is overlapped with the transverse reinforcing bars of the preceding panel, and the other side is overlapped with the transverse reinforcing bars of the trailing panel. become strong That is, by the protector structure according to the present invention, the problem that the transverse reinforcing bars of the preceding panel and the following panel do not overlap each other in the existing underground continuous wall can be solved.

Above all, the use of the protector structure according to the present invention has the advantage that construction is very simple. In other words, by installing blocking boxes on both sides of the preceding panel part, the other side of the lap joint reinforcing bar is stably isolated, and concrete is poured to construct the preceding panel easily. After the preceding panels on both sides are completed, the two blocking boxes can be easily removed at the same time by using a removal means and a driving unit after excavating the trailing panel part between them.

On the other hand, although it has been described and illustrated that the slit is formed on the rear plate of the blocking box, in other examples, it may be configured differently. For example, each pipe may be installed on the back side of the rear plate, and a slit may be formed by making a long cut in the vertical direction at the center of each pipe. In addition, the flange portion of the binding member may be installed in the space between each pipe and the front surface of the rear plate to make it movable. It is added that the configuration of the rail part can be variously modified as described above.

Meanwhile, although it has been mainly described that the protector structure is used for the reinforcing bar joint between the leading panel and the trailing panel so far, in another example, the protector structure may be used for installation of the water stop plate. That is, when the preceding panel is built in a state in which the water stop plate is detachably installed on the front panel of the blocking box, a part of the water stop plate is buried in the concrete of the preceding panel. If the blocking box is removed in this state, the water stop plate and the blocking box are separated from each other. That is, as in the previous example, the lap joint reinforcing bar is separated from the blocking box, in this example, the water stop plate is separated from the blocking box.

There is an advantage that the underground continuous wall can be very easily constructed by the protector structure, the protector structure assembly and the construction method according to the present invention.

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.

100 ... protector structures
10 ... blocking box, 11 ... front panel, 12 ... side panel,
13... back plate, 14 ... bottom plate, 15 ... through hole
20 ... reinforcing bar, 30 ... binding member, 31 ... flange part
32 ... connecting rod, 33 ... joint, 40 ... tow line
50 ... drive unit, c ... concrete
A ... leading panel part, B ... trailing panel part, P ... leading panel part

Claims (4)

In order to construct an underground continuous wall in which the leading panel and the trailing panel of the reinforced concrete structure are continuously arranged to form the outer wall of the basement floor of the building, it is inserted into the excavation part excavated downward,
It is formed long in the vertical direction, the front plate, a pair of side plates respectively extending from both ends of the front plate, and the rear surface coupled between the pair of side plates and having rails formed along the vertical direction a blocking box having a plate; and
Including; including a;
Protector structure, characterized in that when the driving unit installed on the outside of the blocking box operates and applies a force in the lateral direction, the blocking box is pulled toward the driving unit by the removal means and removed.
The method of claim 1,
The rail part is a slit cut along the vertical direction on the rear plate of the blocking box,
The binding member is disposed on the front side of the rear plate and has a flange portion formed to a size to prevent separation through the slit, a connecting rod extending from the flange portion and fitted into the slit, and disposed on the rear surface of the rear plate and a coupling part coupled to the traction line,
Protector structure, characterized in that when the pulling line is pulled, the flange portion pulls the blocking box in the transverse direction.
A pair of protector structures configured as described in claim 1 or 2 and installed on both sides of the ground excavation part; and
A drive unit installed between the pair of protector structures and connected to each traction line of the pair of protector structures; including,
Protector structure assembly, characterized in that when the drive unit is operated, the pair of protector structures are pulled together toward the drive unit and removed.
(a) partitioning so that the leading 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) excavating the preceding panel portions disposed on both sides with the trailing panel portion interposed therebetween, and inserting a preceding rebar network in which transverse and longitudinal reinforcing bars are interconnected to the preceding panel portion, and the protector according to claim 1 or 2 Reinforcing the blocking box of the structure on both sides of the pair of preceding reinforcing bar networks, respectively;
(c) forming a preceding panel by pouring and hardening concrete between the blocking boxes disposed on both sides of the preceding panel part;
(d) excavating the trailing panel part disposed between the preceding panels, installing a shopping mall removing means in a blocking box, installing the driving unit between a pair of preceding panels, and closely adhering to the pair of preceding panels, respectively connecting the traction line of the protector structure to the driving unit;
(e) the blocking box is removed from the preceding panel by operating the driving unit and pulling the blocking box, and the binding member sequentially removes the blocking box while moving from the lower side to the upper side of the blocking box, taking out the blocking box from the trailing panel unit; and
(f) forming a trailing panel by inserting a trailing reinforcement network in which transverse and longitudinal reinforcement are interconnected to the excavated trailing panel part, and pouring and hardening concrete to form a trailing wall construction method comprising: .

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