KR102337785B1 - Wire structure for staggered lapping in slurry wall and construction method using the same - Google Patents

Abstract

The present invention relates to a protector structure for an underground continuous wall rebar lap splice. According to the present invention, the protector structure is inserted into an excavation unit excavated downward for building an underground continuous wall forming an outer wall of an underground floor of a building by having a preceding panel and a following panel made of rebar-concrete structures, which are placed successively. The protector structure comprises: a blocking box including a front surface plate formed to be long in a vertical direction, and having a plurality of penetrating holes formed in a vertical direction apart from each other for inserting lap splice rebars, a pair of side surface plates respectively extended from both side ends of the front surface plate, and a rear plate engaged with the pair of side surface plates; a plurality of lap splice rebars inserted into the plurality of penetrating holes and protruding toward a front surface and a rear surface of the front surface plate; a removing means horizontally moving the blocking box with the parts of the lap splice rebars protruding toward a front surface of the front surface plate embedded in concrete of the preceding panel or the following panel, and separating the lap splice rebars from the blocking box; and a rebar settlement unit including a plurality of hollow mounting pipes installed in the blocking box and communicating with the penetrating holes for inserting the lap splice rebars, and a magnet installed in the mounting pipe and engaging the lap splice rebars by magnetic force. The present invention aims to provide a protector structure for an underground continuous wall rebar lap splice, which is capable of improving the structural strength of walls.

Description

A protector structure for reinforcing reinforcement in an underground continuous wall and a method of constructing an underground continuous wall using the same

The present invention relates to construction technology, and more particularly, to a continuous wall construction method permanently used as an outer wall under a building and a reinforcing bar structure used therein.

A continuous underground 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 they 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 excavation from collapsing, the excavation part is filled by injecting a stabilizing solution (usually bentonite solution) for maintaining the hollow wall together with the excavation.

When the excavation of the preceding panel part is completed, the rebar network in which the transverse rebar (1) and the longitudinal rebar (2) are interconnected is 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 part. 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 .

Structural strength of such a conventional continuous wall is a problem. As described above, since the continuous underground wall makes the trailing panel part after making the leading panel part, the transverse reinforcement 1 of the leading panel part and the trailing panel part does not connect to each other as shown in FIG. 2 . Reinforcement-concrete structure is integrated and advantageous in strength when reinforcing bars are continuous 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 in which the reinforcing bars of the leading panel part and the reinforcing bars of the trailing panel part overlap each other, that is, the overlapping method, as shown in the portion indicated by D in FIG. 3, is being studied. 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 with the end of the trailing reinforcing bar network 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 on both ends of the preceding panel part, 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. Concrete was poured with the preceding and trailing rebar networks overlapping 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 into the preceding panel, it is practically very difficult to put a separate barrier material in order to prevent concrete from being poured at both ends. For reference, reference number g denotes the boundary between the excavation part of the leading panel part and the trailing panel part.

An object of the present invention is to provide a method for constructing an underground continuous wall, which has an effect of substantially overlapping reinforcing bars of a leading panel and a trailing panel in an underground continuous wall, and is easy to construct.

Another object of the present invention is to provide a protector structure for the reinforcing bar lap joint necessary to implement the above construction method.

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 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 floor of the building. As being inserted, the front plate is formed long in the vertical direction and has a plurality of through-holes into which the reinforcing bar can be fitted, which is formed to be spaced apart along the vertical direction, and a pair of side surfaces respectively extending from both ends of the front plate. a blocking box having a plate and a rear plate coupled to the pair of side plates; a plurality of reinforcing bars fitted into the plurality of through-holes and installed to protrude toward the front and rear surfaces of the front plate; a removal means for horizontally moving the blocking box in a state in which the portion protruding toward the front of the front plate among the reinforcing bars is embedded in the concrete of the preceding panel or the following panel to separate the reinforcing bars and the blocking box from each other; and a plurality of hollow mounting pipes installed inside the blocking box and communicating with the through-holes so that the reinforcing bar is inserted, and a magnet installed inside the mounting pipe to magnetically couple the reinforcing bars to the reinforcing bar. It is characterized in that it has a seating unit.

In an example of the present invention, a thread is formed on the inner peripheral surface of the front end of the mounting pipe, and a bolt is coupled to the mounting pipe to close the mounting pipe and the through hole.

In one example of the present invention, it is formed long along the height direction of the blocking box, and further includes a support reinforcing bar coupled to the reinforcing bar, and a support for fixing the support reinforcing bar to the block box. In particular, the support reinforcing bars are preferably arranged in a pair side by side.

The underground continuous wall construction method according to the present invention for achieving the above object 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) excavating the preceding panel unit, reinforcing a preceding rebar network in which transverse and longitudinal reinforcing bars are interconnected into the preceding panel unit, and reinforcing the protector structure of the above configuration on both sides of the preceding reinforcing bar network, respectively, arranging the transverse reinforcing bars of the reinforcing bar network and the outwardly protruding parts of the blocking box among the lap joint reinforcing bars to overlap each other; (c) Concrete is poured and hardened between the protector structures disposed on both sides of the preceding panel part so that the transverse reinforcing bar of the preceding panel and the portion protruding outside the blocking box among the reinforcing bars of the preceding panel are buried together in concrete forming a panel; (d) excavating the trailing panel part, moving the blocking box horizontally by moving the removal means to separate it from the reinforcing bar, and then carrying out the blocking box to the outside of the excavation unit using a crane; (d) reinforcing the trailing reinforcement network in which the transverse reinforcement and the longitudinal reinforcement are interconnected to the excavated trailing panel part, but arranging the transverse reinforcement of the trailing reinforcement network and the lap joint reinforcement to overlap each other; and (e) forming a trailing panel by pouring and hardening concrete so that the trailing reinforcement network and the lap joint reinforcement are buried together in an overlapping state.

When the method using the protector structure according to the present invention is used, the structural strength of the wall is improved because the reinforcing bars of the preceding panel and the following panel can be substantially overlapped while constructing the underground continuous wall very simply.

In addition, in the present invention, since the reinforcing bar fitted into the protector structure is firmly fixed to the blocking box by the mounting pipe and the magnet, construction is simple, and safety accidents due to the detachment of the rebar during the construction process can be prevented. In addition, by connecting and fixing the supporting reinforcing bars to the lap joint reinforcing bars, it is possible to fully prevent accidents.

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, and 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 It is a schematic cross-sectional view after reinforcing rebar and pouring concrete.
3 is a schematic cross-sectional view illustrating a state in which reinforcing bars are overlapped with each other in a conventional underground continuous wall.
Figure 4 is a schematic exploded perspective view of the protector structure for the underground continuous wall reinforcing bar lap splicing according to an example of the present invention.
5 is a perspective view of a state in which the protector structure shown in FIG. 4 is coupled.
6A is a schematic cross-sectional view taken along line aa of FIG. 5 .
Figure 6b is a cross-sectional view of a state in which the reinforcing bar and the blocking box are separated from each other by the hydraulic cylinder in the state of Figure 6a.
7 is a schematic perspective view showing a state in which the protector structure is installed on both sides of the preceding reinforcing bar network to make the preceding panel.
8 is a schematic cross-sectional view of the preceding panel.
9 is a cross-sectional view of a state in which the trailing panel part is excavated and the protector structure is separated in the state of FIG. 8 .
10 is a cross-sectional view of a state in which the blocking box is taken out in the state of FIG. 9 .
11 shows a state in which the trailing reinforcing bar network is inserted and concrete is poured in the state of FIG. 10 to complete the trailing panel.
12 is a schematic cross-sectional view of an underground continuous wall according to a modified example of the present invention.
13 is a view for explaining another example of the underground continuous wall construction method according to the present invention.
Figure 14 is a schematic exploded perspective view of an example in which the support reinforcement and the support for supporting the reinforcing bar in the present invention are installed.
15 is a perspective view of a state in which the support reinforcing bar and the support in FIG. 12 are combined.
16 is a schematic cross-sectional view taken along line bb of 5 of FIG. 15 .
17 is a cross-sectional view for explaining that the bolt is coupled to the mounting pipe.
18 is a schematic exploded perspective view of a blocking box for explaining an example in which the blocking box is formed of a plurality of segments in another example of the present invention.
19 and 20 are schematic perspective and cross-sectional views for explaining the water stop installed in the blocking box.
※ 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.

Hereinafter, with reference to the accompanying drawings, a protector structure (hereinafter referred to as a 'protector structure') for lap splicing of an underground continuous wall reinforcing bar according to an example of the present invention will be first described, and then the The construction method will be described in detail.

A protector structure 100 according to an example of the present invention is shown in FIGS. 4 and 5 .

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 a blocking box 10, a reinforcing bar 20 and a removal means to provide

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 part of the front plate 11 and a bottom plate 14 that is bent to block the lower opening. 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 outwardly from the front plate 11 , and the bottom plate 14 is inclined downward as it goes away from the front plate 11 . On the surface facing the front plate 11 , the rear plate 13 is coupled to a pair of side plates 12 .

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, one side 21 protrudes to the outside of the blocking box 10, and the other side 22 is inside the blocking box 10, as shown in FIG. 6a. 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 buried in the concrete in a state overlapping with the reinforcing bar network of the preceding panel, and the other side 22 is buried in the concrete in a state overlapping with the reinforcing bar network of the succeeding panel. That is, as both sides of the reinforcing bar 20 are overlapped with the reinforcing bar network of the preceding panel and the following panel, respectively, a structural effect of overlapping the reinforcing bar networks of the preceding panel and the following panel occurs 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. When the reinforcing bar 20 is inserted into the through hole 15 , a blocking cap 29 is used to prevent concrete from flowing between the through hole 15 and the reinforcing bar 20 . The blocking cap 29 includes a hollow tube body 25 fitted in the through hole 15 , and a blocking plate 26 formed on the front surface of the tube body 25 . The blocking plate 26 is in close contact with the outside of the front plate 11 in the form of a thin plate. A through hole 28 is formed in the central portion of the diaphragm 26 , and the diameter of the through hole 28 is formed smaller than the diameter of the reinforcing bar 20 . A plurality of incision lines 27 are formed in the periphery of the through hole 28 in the radial direction. When the reinforcing bar 20 is inserted into the blocking cap 29, the portions 26a split by the cut line 27 in the diaphragm 26 are between the reinforcing bar 20 and the inner peripheral surface of the tube body 25. to prevent concrete from entering through this gap. Although only a few blocking caps 29 are shown in the drawings for convenience of explanation, the blocking caps 29 are fitted to all reinforcing bars.

On the other hand, in the front plate of the blocking box 10, the through-holes are formed very densely at vertical intervals, which is to allow the vertical spacing of the reinforcing bars 20 to be freely adjusted. In the through hole into which the reinforcing bar 20 is not inserted, the through hole is closed by various means such as fastening a bolt, thereby preventing concrete from flowing through the through hole.

The removal means is for mutually separating the blocking box (10) and the reinforcing bar (20). In particular, in this example, the removal means uses the cylinder 30 to move the blocking box 10 in the horizontal direction to separate it from the reinforcing bar 20. The cylinder 30 moves the blocking box 10 in the height direction. In this example, a hydraulic method is used for the cylinder, but other methods such as pneumatic are not excluded.

One end of the cylinder 30 is fixed to the rear plate 13 of the blocking box 10 . And the piston 31, as shown in Figures 6a and 6b, is fitted in the circular through-portion 16 formed in the front plate (10). A base plate 33 is coupled to an end of the piston 31 . The base plate 33 is a part in contact with the concrete of the preceding panel and is formed in a much larger area than the piston 31 .

When the cylinder 30 operates and the piston 31 protrudes, the concrete c of the preceding panel 200 acts as a reaction force, and the blocking box 10 is pushed back in the state of FIG. 6A and becomes the state of FIG. 6B . Since one side part 21 of the reinforcing bar 20 is embedded and fixed in the concrete c of the preceding panel 200, when the blocking box 10 is pushed back as in the density 6b, the reinforcing bar 20 is also the front It is separated from the through hole 15 of the plate 10 .

For reference, the base plate 33 is formed with a larger area than the piston to distribute the area applied to the concrete when the piston 31 presses the concrete c as a reaction force, and is coupled to the front end of the piston.

When the blocking box 10 and the reinforcing bar 20 are separated from each other, the piston 31 is inserted back into the cylinder, and the entire blocking box 10 can be taken out using a crane or the like.

On the other hand, as the removal means, various means other than the cylinder may be employed. For example, in another example of the present invention, a pantograph jack (not shown) may be used. That is, one end of the pantograph jack is fixed to the blocking box, and the other end is supported on the concrete of the preceding panel through the penetration part. The pantograph consists of a link and a hinge structure, and the length is stretched and contracted. Like the cylinder, the pantograph uses the concrete of the preceding panel as a reaction force and pushes the blocking box to the rear to separate the blocking box and the reinforcing bars. Since the pantograph jack is a known device, further detailed description will be omitted.

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.

7 is a schematic perspective view showing a state in which the protector structures are installed on both sides of the preceding reinforcing bar network to make the preceding panel, and FIG. 8 is a schematic cross-sectional view of the preceding panel.

First, as shown in FIG. 8, the leading panel part (A) and the trailing panel part (B) are divided along the area where the underground continuous wall is to be made, and the leading panel part (A) is first excavated. After excavating the preceding panel part, the preceding rebar network as shown in FIG. 7 is inserted into the excavated preceding panel part. The preceding reinforcing bar network forms a lattice form by forming a plurality of columns and transverse reinforcing bars 212 and transverse reinforcing bars 211, respectively.

After reinforcing the preceding reinforcing bar network into the preceding panel portion (A), the protector structures 100 of the above-described structure are inserted on both sides of the preceding reinforcing bar network, respectively. At this time, the reinforcing bars 20 of the protector structure 100 are arranged to overlap each other with the transverse reinforcing bars 211 of the preceding reinforcing bar network. This state is the state of FIG. 7 .

In this way, in a state where the reinforcing bars 20 of the protector structure 100 and the transverse reinforcing bars 211 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 as shown in FIG. 8 . The preceding panel 100 is completed. Concrete is not poured in the space 19 in which the reinforcing bar 22 is arranged inside the blocking box 10 in the above state. That is, the concrete c is poured only between the protector structures 100 on both sides of the excavated preceding panel portion A to complete the preceding panel 100 .

When the leading panel 100 is completed, the trailing panel part B is now excavated. When the trailing panel part (B) is excavated, an excavation space is formed in the rear of the protector structure (100). After excavating the trailing panel, the blocking box 10 and the reinforcing bar 20 are separated from each other by using a plurality of cylinders 30 as shown in FIG. 9 . When hydraulic pressure is applied to the plurality of cylinders 30 together, the piston 31 protrudes. The piston 31 pushes the cylinder 30 backward by using the concrete c as a reaction force. Since the cylinder 30 is fixed to the blocking box 10 , the entire blocking box 10 is pushed to the rear. A part 21 of the reinforcing bar 20 is embedded and fixed in the concrete c, and as shown in FIG. 9, the blocking box 10 and the reinforcing bar 20 are separated from each other In the state of FIG. 9, 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, the other side of the reinforcing bar 20 is exposed. In this state, the trailing reinforcing bar network is inserted into the trailing panel part (B). Like the trailing reinforcing bar network and the preceding reinforcing bar network, the trailing reinforcing bar network 80 composed of the transverse reinforcing bars 311 and the longitudinal reinforcing bars 312 is inserted into the trailing panel part B. Also at this time, the transverse reinforcing bars 311 of the trailing reinforcing bar network are arranged to overlap each other with the overlapping reinforcing bars 20 . Concrete (c) is poured and hardened in a state in which the reinforcing bars are overlapped in this way to complete the trailing panel 300 as shown in FIG. 11 .

That is, the underground continuous wall has a structure in which the leading panel 200 and the trailing panel 300 are alternately arranged, and the reinforcing bar 20 is interposed therebetween. One side 21 of the reinforcing bar is overlapped with the transverse reinforcing bar 211 of the preceding panel 200, and the other side 22 is overlapped with the transverse reinforcing bar 311 of the trailing panel 300, as a result, the preceding The reinforcing bar network of the panel and the trailing panel has an effect of overlapping each other, making it structurally stronger. 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.

In addition, there is an advantage that construction is very simple. That is, in the present invention, the preceding reinforcing bar network, the trailing reinforcing bar network, and the protector structure are respectively separately assembled, and these are independently inserted into the preceding panel unit and the following panel unit. For example, in another invention of the present applicant (currently unpublished), it can be seen that the construction is very simple compared to the case in which the blocking box must be pre-assembled on both sides of the preceding reinforcing bar network and must be inserted into the preceding panel.

On the other hand, in Figure 12, the arrangement of the reinforcing bar network according to another example of the present invention is shown in a slightly deformed form in the previous example. Referring to FIG. 12 , it can be seen that, unlike the previous example, the transverse reinforcing bars 211 of the preceding panel are disposed to be deeply inserted up to the side portion 12 of the blocking box 10 . Of course, FIG. 12 shows the completed state in which the blocking box 10 is removed, but if you look at the arrangement of the transverse reinforcing bars 211 of the preceding panel, when the protector structure 100 is installed, the arrangement of the transverse reinforcing bars 211 of the preceding panel status can be known. In addition, in the previous example, the transverse reinforcing bars 311 of the trailing panel 300 were directly overlapped with the overlapping reinforcing bars 20, and in this example, a separate reinforcing bar 320 (transverse reinforcing bars) was used to overlap them. It overlaps with the reinforcing bar (20). Referring to FIG. 12 , a pair of reinforcement reinforcing bars 320 are coupled to the transverse reinforcing bars 311 of the trailing panel 300 , and the ends of the pair of reinforcing reinforcing bars 320 are narrowed to each other so that the overlapped inward. Since it is easy to install the reinforcing bar network of the leading panel and the trailing panel according to the standard at the actual construction site, the rebar mesh can be manufactured according to the standard and overlapped with the lap joint using a separate boosting force. Of course, a plurality of reinforcement reinforcing bars are installed along the height direction of the reinforcing bar network.

When configured as described above, as shown in FIG. 12 , the transverse reinforcement 211 of the preceding panel and the reinforcing bar 20 are overlapped, and the transverse reinforcing bar 311 of the trailing panel is the reinforcing bar 20 are overlapping This configuration is also the same in the previous example. An important point is that the transverse reinforcement 211 of the preceding panel and the reinforcement reinforcement 320 of the trailing panel overlap each other. Since the reinforcement reinforcement 320 is combined with the transverse reinforcement 311 of the trailing panel 300, it can be viewed integrally with the transverse reinforcement 311 of the trailing panel, so the reinforcement of the preceding panel and the trailing panel is substantially overlapped. there is

On the other hand, FIG. 13 is for explaining a method of making one leading panel by another method of the present invention and then continuously connecting the succeeding panels from both ends of the preceding panel. In the method described above, the leading panel and the trailing panel are alternately arranged, but in this example, one leading panel is built, and then the succeeding panels are continuously built after that.

That is, the leading panel part and the trailing panel part are divided, respectively, and the preceding panel is built. After the leading panel is built, the trailing panel is excavated and the blocking boxes installed on both sides of the leading panel are removed. A reinforcing bar network composed of transverse reinforcing bars 311, longitudinal reinforcing bars 312, and reinforcing reinforcing bars 320 is inserted into the trailing panel parts B1 and C1, so that the multi-joint reinforcing bars 20 and the reinforcing bars 320 of the preceding panel overlap. place it loosely The process so far is the same as the method described above. Here, there is a difference from the method described above in that the protector structure 100 is installed at the other end of the trailing panel. Looking at the other side (far from the leading panel) of part B1 in FIG. 13 , the reinforcing bar 20 of the protector structure 100 is disposed to overlap with the other end 311a of the transverse reinforcing bar 311 of the following panel. it can be seen that Concrete is poured in the above state to complete the trailing panel 300B. Then, the following panel 300B is built through the same process on the succeeding panel part B2 that is continuously connected in the same way. The construction method is also applied symmetrically to the trailing panel part C1 on one side of the preceding panel to continuously make the trailing panel 300C.

In the method described above, the leading and trailing panel parts are alternately arranged, and after all the preceding panel parts are built, only the trailing reinforcing bar network is inserted and concrete is poured into the trailing panel part between them. It was a structure in which the multi-joint reinforcing bars and the trailing reinforcing bars connected from the preceding panel were mutually stacked. However, in this example, there is a difference in that, after the protector structures are installed on both sides of the leading panel to be built first, the protector structures are installed at the other end of the trailing panel thereafter to continuously build the following panels.

On the other hand, there are two methods in constructing a continuous wall using the protector structure 100 described so far. One is to firmly fix the reinforcing bar 20 to the blocking box 10 to prevent the reinforcing bar 20 from being separated from the blocking box during the construction process. Another point to note is that the blocking box 10 maintains its shape and verticality without being distorted even during the construction process or repeatedly recycled. In the present invention, a configuration for solving this problem is newly proposed.

Hereinafter, the above two items will be described in more detail with reference to FIGS. 14 to 18 .

14 is a schematic exploded perspective view of an example in which a support reinforcing bar and a support for supporting the reinforcing bar in the present invention are installed, and FIG. 15 is a perspective view of a state in which the support rebar and the support are combined in FIG. 16 is a schematic cross-sectional view taken along line b-b of FIG. 15, and FIG. 17 is a cross-sectional view for explaining that the bolt is coupled to the mounting pipe.

Referring to the drawings, in one example of the present invention, a reinforcing bar seating unit is provided in order to stably mount the reinforcing bar 20 to the blocking box 10 . The rebar seating unit includes a mounting pipe 40 and a magnet 50 . The mounting pipe 40 is installed inside the blocking box 10 . The mounting pipe 40 is formed in a hollow shape and is installed in communication with the through hole 15 of the front plate 11 . The mounting pipe 40 may be installed to extend from the front plate 11 to the rear plate 13 , but in this example, it does not extend to the rear plate 13 and is formed a little shorter. This is because the weight of the protector structure 100 increases when the mounting pipe is long. When the reinforcing bar 20 is inserted and installed in the mounting pipe 40, it is possible to prevent the reinforcing bar 20 from shaking in the vertical direction as compared to the case where there is no mounting pipe.

The magnet 50 is installed at the inner end of the mounting pipe 40 . When the reinforcing bar 20 is inserted into the mounting pipe 40, it is attached to the magnet 50, and even if the blocking box 10 is tilted, the reinforcing bar 20 is prevented from leaving the mounting pipe 40.

And, as shown in FIG. 17 , the bolt 42 is coupled to a place where the reinforcing bar 20 is not inserted among the plurality of through-holes 15 formed in the front plate 11 of the blocking box. By fastening the bolt 42 to the screw thread 41 formed on the inner circumferential surface of the mounting pipe 40, the inflow of concrete is prevented.

In addition, referring to FIGS. 14 and 15 , in this example, a support reinforcing bar 60 and a support bar 70 are provided. A pair of supporting reinforcing bars 60 arranged side by side is formed long along the height direction of the blocking box 10, and a plurality of reinforcing bars 20 are fixed. It can be connected using wire, etc. And on the upper side of the blocking box 10, a pair of supporters 70 are installed long in the transverse direction. One side of the support 70 is fixed to the upper side of the blocking box 10 , and the other side is fixed to the upper end of the support reinforcing bar 60 . Due to the configuration of the support rebar 60 and the support 70, the reinforcing bar 20 is prevented from being separated from the block box even when the block box is tilted. When the construction of the preceding panel or the following panel is finished and the blocking box 10 is removed, the coupling between the support rebar 60 and the support 70 is released, and only the blocking box 10 and the support 70 are removed. The support reinforcing bar 60 is embedded in the preceding (following) panel together with the reinforcing bar 20.

In the present invention, the separation of the reinforcing bar 20 is prevented by the mounting pipe 40 and the magnet 50, and the detachment of the reinforcing bar 20 is also prevented by the support reinforcing bar 60 and the support 70. can be prevented These two means may be selectively applied respectively, and when applied together, the lap joint reinforcement can be fixed more firmly.

On the other hand, in another example of the present invention, the blocking box 10A may be manufactured in a plurality of segments along the height direction as shown in FIG. 18 . Since the blocking box 10A is very high at about 10 m or more, there is a concern that the blocking box may be distorted and the verticality may not be accurately maintained in the process of moving and working by lifting the blocking box by the crane during the construction process. If the blocking box is twisted, the verticality is not maintained, so there is a problem that it cannot function accurately as a form when concrete is poured after it is installed in the excavation part. Another problem remains that, since the block box is very long, it is difficult to transport it to the construction site even after the block box is manufactured at the factory. Accordingly, the blocking box 10A may be divided into a plurality of segments 80 along the vertical direction as shown in FIG. 18 . And each segment 80 is provided with reinforcing bars 81 and 82 on the upper and lower surfaces, respectively, and holes 83 are formed in the reinforcing bars. In a state in which the upper and lower segments are in contact with each other, the bolt (b) and the nut (n) are fastened through the hole 83 to assemble the blocking box 10A. By dividing the blocking box (10A) into a plurality of segments in this way, above all, transportation is facilitated, and there is an advantage that the original shape can be well maintained without distortion or deformation.

As described above, in the present invention, when constructing a continuous wall using a protector structure, it is possible to prevent the reinforcing bars from shaking or departing from the blocking box. This simplifies the construction and has the advantage that safe construction is possible.

For reference, a water stop plate applied to an example of the present invention will be briefly described. The example of the blocking box shown in FIGS. 19 and 20 includes a pair of water stop plates 90 . One end of the water stop plate 90 is loosely coupled to the side surface of the blocking box 10 , and the other end protrudes with respect to the blocking box 10 . These protruding parts are buried together when the concrete hardens. And when the blocking box 10 is separated and removed, the water stop plate 90 is separated from the blocking box 10 and remains on the preceding (following) panel as it is. The part attached to the blocking box is buried in the succeeding panel that is built continuously. As a result, one side and the other side of the water stop plate 90 are embedded in adjacent panels, respectively. It is assumed that the concrete of adjacent panels is integrally connected to each other, but since they are poured at different times, minute gaps may occur between the concrete and water may flow through the gaps. The water stop plate prevents water from entering the inside of the wall through the concrete of two adjacent panels.

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, 10A ... blocking box, 11 ... front panel, 12 ... side panel,
13... back plate, 14 ... bottom plate, 15 ... through hole
20 ... lamination bars, 29 ... blocking caps, 30 ... cylinders
31 ... piston, 33 ... base plate, c ... concrete
40 ... mounting pipe, 42 ... bolt, 50 ... magnet
60 ... support bars, 70 ... supports, 80 ... segments
81,82 ... ribs, 90 ... stop plates
200 ... leading panel, 300, 300A, 300B, 300C ... trailing panel
211,311 ... transverse reinforcement, 212,312 ... longitudinal reinforcement
320 ... stress muscle, A ... leading panel part, B, B1, B2, C1 ... trailing panel part

Claims (8)

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,
A front plate in which a plurality of through-holes which are formed long in the vertical direction and can be fitted with reinforcing bars in the vertical direction are formed to be spaced apart along the vertical direction, a pair of side plates respectively extending from both ends of the front plate; a blocking box having a rear plate coupled to a pair of side plates;
a plurality of reinforcing bars fitted into the plurality of through-holes and installed to protrude toward the front and rear surfaces of the front plate;
a removal means for horizontally moving the blocking box in a state in which the portion protruding toward the front of the front plate among the reinforcing bars is embedded in the concrete of the preceding panel or the following panel to separate the reinforcing bars and the blocking box from each other;
a support reinforcing bar formed long along the height direction of the blocking box and coupled to the lap joint reinforcing bar; and
A protector structure for reinforcing reinforcement in an underground continuous wall, characterized in that it includes a support for fixing the supporting reinforcement to the blocking box. The method of claim 1,
A plurality of hollow mounting pipes installed inside the blocking box and communicating with the through-holes so that the reinforcing bar is inserted, and a magnet installed inside the mounting pipe to magnetically couple the reinforcing bars to the reinforcing bars Unit; protector structure for the continuous underground wall reinforcing bar lap joint, characterized in that it further comprises. 3. The method of claim 2,
A thread is formed on the inner peripheral surface of the front end of the mounting pipe,
A bolt is coupled to the mounting pipe to close the mounting pipe and the through hole. The method of claim 1,
The support reinforcing bar is a protector structure for a continuous underground wall reinforcing bar, characterized in that arranged in a pair side by side. (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) excavating the preceding panel part, inserting a preceding reinforcing bar network in which transverse and longitudinal reinforcing bars are interconnected to the preceding panel unit, and inserting the protector structure according to any one of claims 1 to 4 of the preceding reinforcing bar network Reinforcing each on both sides, arranging the transverse reinforcing bars of the preceding reinforcing bar network and the outwardly protruding portions of the blocking box among the lap joint reinforcing bars overlap each other;
(c) Concrete is poured and hardened between the protector structures disposed on both sides of the preceding panel part so that the transverse reinforcing bar of the preceding panel and the portion protruding outside the blocking box among the reinforcing bars of the preceding panel are buried together in concrete forming a panel;
(d) excavating the trailing panel part, moving the blocking box horizontally by moving the removal means to separate it from the reinforcing bar, and then carrying out the blocking box to the outside of the excavation unit using a crane;
(d) reinforcing the trailing reinforcement network in which the transverse reinforcement and the longitudinal reinforcement are interconnected to the excavated trailing panel part, but arranging the transverse reinforcement of the trailing reinforcement network and the lap joint reinforcement to overlap each other; and
(e) forming a trailing panel by pouring and hardening concrete so that the trailing reinforcing bar network and the lap joint reinforcing bars are buried together in an overlapping state; 6. The method of claim 5,
The underground continuous wall construction method, characterized in that the transverse reinforcement of the preceding panel is deeply inserted into the side of the side part of the blocking box and arranged. 6. The method of claim 5,
Further comprising a reinforcement reinforcement formed in the transverse direction coupled to the transverse reinforcement of the trailing panel,
The underground continuous wall construction method, characterized in that the end of the reinforcement reinforcement of the trailing panel is arranged to overlap the lap joint reinforcement. (a) dividing the area in which the continuous wall is constructed into a preceding panel part for excavation construction first, and a plurality of succeeding panel parts continuously connected from the preceding panel part;
(b) excavating the preceding panel part, inserting a preceding reinforcing bar network in which transverse and longitudinal reinforcing bars are interconnected to the preceding panel unit, and inserting the protector structure according to any one of claims 1 to 4 of the preceding reinforcing bar network Reinforcing each on both sides, arranging the transverse reinforcing bars of the preceding reinforcing bar network and the outwardly protruding portions of the blocking box among the lap joint reinforcing bars overlap each other;
(c) Concrete is poured and hardened between the protector structures disposed on both sides of the preceding panel part so that the transverse reinforcing bar of the preceding panel and the portion protruding outside the blocking box among the reinforcing bars of the preceding panel are buried together in concrete forming a panel;
(d) excavating the trailing panel part, moving the blocking box horizontally by moving the removal means to separate it from the reinforcing bar, and then carrying out the blocking box to the outside of the excavation unit using a crane;
(e) arranging the trailing reinforcement network in which the transverse reinforcement and the longitudinal reinforcement are mutually connected to the excavated trailing panel part so that one end of the transverse reinforcement of the trailing reinforcement network and the lap joint reinforcement overlap each other;
(f) arranging the other end of the lateral reinforcing bar of the trailing panel and the lap joint reinforcing bar in any one of claims 1 to 4 to the other end of the trailing panel part so as to overlap each other; and
(g) pouring and hardening concrete so that both ends of the transverse reinforcement of the trailing reinforcement network are buried together in an overlapping state with the lap joint reinforcement of the protector structure disposed on both sides of the trailing reinforcement network, respectively, forming a trailing panel; An underground continuous wall construction method comprising a.

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