KR102214787B1 - Multi guide block and construction method of underground continuous wall using the same - Google Patents

Abstract

The present invention relates to a multi-guide block, which reinforces a joint between continuous panels when an underground continuous wall is constructed, thereby improving waterproofing performance and bearing capacity of the underground continuous wall. The multi-guide block includes: a guide block; and a multi-plate coupled to the guide block to be separable and embedded in the joint between the panels forming the underground continuous wall, wherein the multi-plate has a waterproofing plate and a joint rod installed on both front and back directions, respectively.

Description

Multi-guide block and construction method of underground continuous wall using it {MULTI GUIDE BLOCK AND CONSTRUCTION METHOD OF UNDERGROUND CONTINUOUS WALL USING THE SAME}

The present invention is a block member installed in the connection portion to improve the ordering performance and strength of the underground continuous wall by reinforcing the connection between the panel and the panel when constructing the underground continuous wall, and a construction method of the underground continuous wall using the same It is about.

If the ground is to be excavated to build an underground building in the ground, an earthen wall is installed to prevent the collapse of the excavation surface and to prevent groundwater from flowing into the working space.

Various construction methods can be applied according to the working environment or conditions, such as ground conditions and the scale of the underground building, for the construction of such earthing walls. Among them, the underground continuous wall construction method, also called the slurry wall construction method or the D-wall construction method. The wall constructed by the structure has very high water-repellency and rigidity and can be used as a permanent wall of this structure, so it is particularly widely used in large-scale construction in urban areas or large depth constructions where a lot of groundwater flows out.

In the underground continuous wall construction method, a trench is formed through underground excavation, a reinforcing bar network is installed inside the trench, concrete is poured to build a preceding panel, and a trench is formed by extending the rebuilt panel, and then a rebar network is installed. And it is done by pouring concrete here to build a trailing panel.

Therefore, the joint between the preceding panel and the following panel becomes a weak part and becomes a passage for groundwater leakage.In order to solve this problem, a water shield plate is installed at the joint of the preceding panel and the succeeding panel to improve the ordering capacity of the underground continuous wall. Efforts to make it continue.

For example, Patent Publication No. 10-1051965 uses the panel joint 100 shown in FIG. 1 to provide a shielding plate 110 between the joints of the preceding concrete unit panel 200 and the following concrete unit panel 300. To be installed.

As shown in Fig. 2, a) the panel joint 100 into which the water shielding plate 110 is inserted is installed on one side of the excavation space, and concrete is poured into the excavation space to form a reinforced concrete structure. After constructing the preceding concrete unit panel 200, b) excavating the adjacent ground to secure a trailing excavation space for the construction of the following concrete unit panel 300, and thereby replace the exposed panel joint 100 Separated from (110) and removed, c) reinforcing reinforcing bars are installed in the following excavation space again, and concrete is poured, so that one side is embedded in the preceding concrete unit panel (200). By being buried in 300), the water shield plate 110 is installed at the joint between the preceding concrete unit panel 200 and the following concrete unit panel 300.

However, the above-described joint according to Registration No. 10-1051965 is a simple connection between the preceding concrete panel 200 and the following concrete panel 300 so that both ends are in contact, and only the shield plate 110 is installed therebetween. Not only is it very fragile, but it is also not easy to check the joint state of the joint.

For example, the preceding concrete panel 200 and the following concrete panel 300 differ in the degree of drying shrinkage during the curing process because the concrete pouring time is different, and thus there is a possibility that voids may occur in the joint.

In addition, the joint between the preceding concrete panel 200 and the trailing concrete panel 300 is made of a non-rooted concrete structure, so when vibrations such as earth pressure or earthquakes occur in the underground continuous wall, stress concentration is generated and the order performance is lost. There is a problem.

KR 10-1051965 B1

The present invention was conceived to solve the above-described problems of the prior art. In addition to structurally unifying the panels constituting the underground continuous wall and the panels, the joints between these panels are piled to increase rigidity, It is intended to provide a multi-guide block in which the order structure of the continuous wall is not destroyed, and a construction method of the underground continuous wall using the same.

In addition, the present invention provides a multi-guide block for maintaining the continuity of the order structure even if the length of the order structure becomes longer due to the very deep depth of the underground continuous wall, and a method of constructing the underground continuous wall using the same. I want to provide.

According to the most preferred embodiment of the present invention for solving the above problems, it consists of a guide block and a multi-plate that is detachably coupled to the guide block and is buried in the joint between the panel and the panel forming an underground continuous wall. The multi-plate is provided with a multi-guide block, characterized in that the shield plate and the connecting rod are respectively installed in both front and rear directions.

Here, the guide block includes a block body formed by combining a pair of end plates located at both ends of the upper and lower ends and a pair of side plates located at both left and right sides, and protruding to both sides of the block body while being located at the rear of the block body. It is made of a supporting outer plate so that a piece is formed, and a gripper is installed on the protruding piece to form a fitting slit between the side plate and the gripper, and the multi-plate is a half consisting of a fitting fixing plate and a horizontally bent support inner plate. A pair of plates are combined and configured, and a fitting fixing plate is inserted into the fitting slit so that the multi-plate may be detachably coupled to the guide block.

In addition, the gripper may be constituted of an elastic member comprising a support piece fixed to the support shell plate and a pressing piece extending from the support piece and having a free end portion thereof, so that the fitting fixing plate is pressed and fixed.

In addition, a connecting rod is installed on one end plate of the block body, and a connection hole into which the connecting rod is inserted is provided in the other end plate of the block body, so that a plurality of multi-guide blocks are jointly connected or a head for assembly to the multi-guide block. Can be easily installed.

In addition, the side plate of the block body and the fitting fixing plate of the half plate are provided with internal and external working openings that match each other to facilitate the joint connection of the multi-guide block and the installation of the assembly head.

In addition, by providing each of the inner and outer pin fixing holes coincident with the side plate of the block body and the fitting fixing plate of the half plate, and allowing the locking pin to pass through the inner and outer pin fixing holes together, You can prevent the plate from separating.

In addition, a sealing plate may be provided with a sealing hole in the fixing plate of the half plate, so that the gap between the half plates opposite to each other is narrowed by the pressing rod inserted into the sealing hole and the pressing nut fastened thereto, so that the water shield plate can be fixedly installed. have.

According to another embodiment of the present invention, the multi-guide block is used, comprising: a) excavating the ground to form a preceding trench for building a preceding panel; b) installing a multi-guide block on at least one of the front and rear inner surfaces of the preceding trench; c) inserting a reinforcing bar net into the preceding trench and pouring concrete; d) forming a trailing trench for building a trailing panel so that the block body of the multi-guide block is exposed; e) removing the block body by separating the block body and the multi-plate of the multi-guide block; f) inserting a reinforcing bar net into the trailing trench and pouring concrete; a method of constructing an underground continuous wall is provided.

In the present invention, a multi-plate and a joint bar are installed at the joint between the panel and the panel to form a pile-shaped structure having independent rigidity, and function as a high shear connector for both panels, so that each panel has an integral behavior. In addition, since there is no room for cracks to occur at the joints, the underground continuous wall constructed thereby can function as an outer wall having a very high order performance and high strength.

In addition, in the present invention, it is not only easy to connect a plurality of joints of the multi-guide blocks, but also have high integrity between the multi-guide blocks connected by the joints by means of a connecting rod and a fastening means, and As it can maintain the continuity of the underground continuous wall, it has versatility and reliability that can be easily applied to all depths at which the underground continuous wall is constructed. In addition, since this joint connection operation is performed outside the trench, safety and workability are improved, thereby enabling precision work.

In addition, since the guide block of the present invention is installed and removed in a state in which the part that comes into contact with the concrete of the panel is minimized, the effort such as cleaning for reuse after recovery is minimized, thereby enabling economical repeated use.

1 is a cross-sectional view of a panel joint for installing a water shield plate at a joint between a panel and a panel according to the prior art.
2 is an explanatory view of a method of constructing an underground combustion wall using the panel joint.
3 is a perspective view of a multi-guide block according to an embodiment of the present invention.
4 is an exploded perspective view of the multi-guide block.
5 is an enlarged perspective view of portions A and B of 4;
6 is a perspective view of the assembly head of the present invention.
7 is a perspective view of the multiplate of the present invention as viewed from above and below.
8 is an explanatory diagram of an operation relationship of a gripper according to an embodiment of the present invention.
9 is an explanatory view of the operation relationship of the locking means according to an embodiment of the present invention.
Fig. 10 is an explanatory diagram of a water shield plate installation structure according to the present invention.
11 and 12 are perspective views of still another embodiment of the structure of the shield plate of the present invention.
13 to 21 are vertical and horizontal cross-sectional views of each step of the method for constructing an underground continuous wall using a multi-guide block of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in the case of obscuring or obscuring the technical idea of the present invention due to a detailed description of a known configuration in the description of the present invention, a description of the known configuration will be omitted.

3 is an overall view of the multi-guide block MB according to an embodiment of the present invention, and FIG. 4 is an exploded view of the multi-guide block MB.

The multi-guide block (MB) of the present invention is installed in front or rear of the excavated trenches (T1, T2) when constructing the continuous panels (P1, P2) to build the underground continuous wall, and the panel (P1) and In addition to the order function to prevent the penetration of groundwater in the joint (J) between the panels (P2), and to have a structural continuity strongly coupled between the panels (P1, P2), as shown in Figs. As it is lost, it consists of a guide block 10 and a multi-plate 30.

The guide block 10 guides the multi-plate 30 so that it is embedded and installed in the joint J between the panels P1 and P2, and the multi-plate 30 until the construction of the panels P1 and P2 is completed. ) Is supported, and once the construction of one panel is completed, it is recovered and reused repeatedly for the construction of another panel.

As shown in FIG. 3, the guide block 10 includes a block body 10A for guiding the detachment of the multi-plate 30 and a support shell 10B for supporting the block body 10A. Among them, the block body 10A has a rectangular belt plate shape in a long direction in which a pair of end plates 11 located at both ends of the upper and lower sides and a pair of side plates 12 located at both left and right sides are combined to open both the front and rear sides. . Accordingly, the support shell 10B has a shape of a plate-like structure that closes the open portion behind the block body 10A, and protrusions 19 are formed on both sides of the block body 10A to be described later. 20) installation surface is provided. A reinforcing wall 18 may be further installed in the inner space of the block body 10A in which the end plate 11 is formed by the side plate 12.

5 is an enlarged view of portions A and B of FIG. 4 in order to explain a specific embodiment of the block body 10A.

Fastening holes 15a and 15b are provided in both end plates 11 of the block body 10A. The fastening holes 15a and 15b allow the lower end of the multi-guide block MB located at the top and the upper end of the multi-guide block MB located at the lower end to be fastened with a fastening means, so that the multi-guide blocks MB at the upper and lower portions are It becomes a coupling means to be structurally united.

In addition, a connecting rod 13 protruding outward is installed on one end plate 11 of the block body 10A, as shown in FIG. 5A. In addition, a connection hole 14 into which the connection rod 13 is inserted is also provided in the other end plate 11 of the block body 10A corresponding to the connection rod 13 as shown in FIG. 5B.

When a plurality of the connecting rod 13 and the connecting hole 14 are jointly connected and used, the coupling process between the multi-guide blocks (MB) can be made more accurate and simple. Guide.

That is, the fastening holes 15a and 15b between the upper and lower multi-guide blocks MB are in a state in which the connecting rod 13 of one multi-guide block MB is inserted into the connecting hole 14 of the other multi-guide block MB. When the connecting rod 13 is inserted into the connecting hole 14, the corresponding fastening holes 15a and 15b naturally coincide with each other, and accordingly, the fastening operation can be easily performed.

In addition, the upper end of the multi-guide block (MB), specifically the guide block (10), so that the multi-guide block (MB) is inserted into the trench (T1, T2) to be installed or the guide block (10) is removed. The assembly head 60 to be described later is installed on the upper end of ). Even at this time, the connecting rod 13 is inserted into the insertion hole 61 of the assembly head 60, and the fastening hole 15a provided in the end plate 11 of the block body 10A and the assembly head 60 By matching the fastening holes 62 provided in each other to facilitate the coupling between them.

A mounting hole 19a may be further provided in the protruding piece 19 of the support shell 10B. The mounting hole (19a) is provided in at least one of the upper and lower portions of the protruding piece (19), when a plurality of multi-guide blocks (MB) are to be jointly connected, the lower part inserted first into the trench (T1, T2) By enabling joint connection work while the upper part of the multi-guide block (MB) protrudes to the outside of the trenches (T1, T2), joint connection work between the multi-guide blocks (MB) can be made safely and efficiently. do. Detailed matters regarding this will be described in connection with the construction method of the underground continuous wall to be described later.

6 shows an embodiment of the above-described assembly head 60.

As described above, the assembly head 60 lifts the multi-guide blocks MB in the trenches T1 and T2 or when removing the guide blocks 10, or a plurality of multi-guide blocks MB. As to be able to suspend the upper multi-guide block (MB) when interconnecting each other, the insertion hole 61 and the fastening hole 62, each provided with a joint piece (60A), and the joint piece (60A) It is installed vertically on and consists of a suspension piece (60B) provided with a suspension hole (63).

The connecting rod 13 is inserted into the insertion hole 61. In addition, the fastening hole 62 provided in the bonding piece 60A is provided in the end plate 11 when the bonding piece 60A and the end plate 11 of the block body 10A come into contact with each other at the correct position. Each corresponding fastening hole (15a) and its position is matched. Therefore, the operator, like the work of connecting a plurality of multi-guide blocks (MB), the connecting rod (13) installed on the end plate (11) of the block body (10A) into the insertion hole (61) of the assembly head (60). After being inserted, it is possible to perform the fastening work immediately without performing a separate fitting work for the fastening holes 15a and 62 provided in the end plate 11 and the bonding piece 60A.

A reinforcing piece (60C) may be further installed between the joining piece (60A) and the suspension piece (60B).

On the other hand, for the fastening work for the fastening holes 15a, 15b, 62), it is necessary to enter the operator's hand or tool into the block body 10A. For this purpose, the side plate of the block body 10A ( 12) is provided with an inner working opening (16). Therefore, by inserting the work tool into the block body 10A through the inner work opening 16, the operator can easily integrate the upper multi-guide block (MB) and the lower multi-guide block (MB). Of course, the fitting fixing plate 31 of the multi-plate 30, which will be described later, should also be provided with an outer working opening 35 that matches the inner working opening 16.

7 is a view of the multi-plate 30 from the top and bottom. The multi-plate 30 is detachably coupled to the guide block 10, and is buried in the joint J between the panel P1 and the panel P2 to form a pile-shaped structure to form a joint part J It functions as a shear connector so that each panel (P1, P2) can behave integrally while increasing the rigidity of ). In addition, the multi-plate 30 also serves as a guide to allow the shield plate 50 to be installed at a proper position inside the joint (J).

This multi-plate 30 is configured by coupling a pair of half plates 30A comprising a fitting fixing plate 31 and a support inner plate 32 bent horizontally thereto.

The multi-plate 30 is coupled to the guide block 10 in a form surrounding the open portion in front of the block body 10A and both side plates 12, and the fitting fixing plate 31 is the block body 10A. It is fixed to be detachable while in contact with the side plate 12.

To this end, a gripper 20 is installed on the protruding piece 19 formed by the support shell 10B so that a fitting slit (s) is formed between the side plate 12 and the gripper 20. Accordingly, the fitting fixing plate 31 not only allows the multi-plate 30 to be coupled to the guide block 10 while being inserted into the fitting slit (s), but also can be easily removed from the fitting slit (s), so that the multi-plate 30 It facilitates the separation work between the and the guide block (10).

At this time, the gripper 20 is composed of an elastic member, and a support piece 21 and a pressing piece 22 extended and bent from the support piece 21 have a ∧-shaped cross section, and the support piece ( 21) is fixed to the protruding piece 19, and the end of the pressing piece 22 is configured as a free end, so that the fitting fixing plate 31 inserted into the fitting slit s by the elastic force of the gripper 20 is Pressurized to prevent the multi-plate 30 from being unintentionally easily separated from the guide block 10, while removing the guide block 10 from the multi-plate 30 can be easily separated by the elastic force. . 8 illustrates the above-described operation relationship when the gripper 20 is configured with an elastic member as described above.

However, if the fixing plate 31 inserted into the fitting slit (s) is not completely fixed only by the elastic force of the gripper 20, the wedge member 44 is placed between the fitting fixing plate 31 and the gripper 20. It is also possible to make their bonded state more rigid by inserting.

In addition, a locking means may be further provided in the multi-guide block MB. The locking means prevents unintentional separation between the guide block 10 and the multi-plate 30 during a working process, and FIG. 9 shows an embodiment of such a locking means.

The locking means is sufficient as long as it is configured to facilitate locking and unlocking of the coupling structure of the guide block 10 and the multi-plate 30. According to the embodiment shown in FIG. 9, the block body 10A ), the inner pin fixing hole 17 is provided in the side plate 12, and the inner pin fixing hole in the fitting fixing plate 31 of the half plate 30A that comes into contact with the side plate 12 of the block body 10A when combined An outer pin fixing hole 36 corresponding to (17) is provided, so that the locking pin 41 passes through the inner and outer pin fixing holes 17 and 36 together to be fixed. At this time, the locking pin 41 may be provided with a male thread so that the locking pin 41 may be fastened and fixed to any one of the inner and outer pin fixing holes 17 and 36 by a screw fastening method.

Therefore, when the side plate 12 of the block body 10A and the fitting fixing plate 31 of the half plate 30A are locked by the locking pin 41, the multi-plate 30 installed on the guide block 10 is separated in the front and rear directions. It cannot be.

The locking operation of the locking pin 41 is usually performed outside the multi-plate 30 and is immediately removed when the installation work inside the trenches (T1, T2) is completed, but due to the conditions of the operation, when the concrete pouring is completed. There are cases in which the locking and unlocking operations must be performed inside the block body 10A due to the fact that the locking pin 41 must remain until the end. Therefore, it is preferable that the inner and outer pin fixing holes 17 and 36 are located in the vicinity of the inner and outer work openings 16 and 35.

Meanwhile, the multi-plate 30 of the present invention increases the rigidity of the joint J between the panel P1 and the panel P2, as described above, while allowing the panels P1 and P2 to behave integrally. For this purpose, the multi-plate 30 is provided with a joint rod 38 in both front and rear directions.

The joint bar 38 located in front of the multi-plate 30 is embedded in the preceding panel P1 to allow shear connection between the preceding panel P1 and the multi-plate 30, and located at the rear of the multi-plate 30. The connecting rod 38 is embedded in the trailing panel P2 so that the front panel 30 and the trailing panel P2 are connected in a shear connection, so that the preceding panel P1 and the trailing panel P2 connect the multi-plate 30 to each other. It makes it structurally unity through the medium. At this time, by forming a hook (not shown) at the end of the connecting bar 38, the connecting bar 38 may have a more powerful shear connection function. These joint rods 38 are specifically vertically installed in the front and rear support inner plate 32 of the half plate 30A.

10 shows the installation structure of the shield plate 50.

A water shield plate 50 that prevents intrusion of groundwater at the joint J of the panel P1 and the panel P2 is also vertically installed on the multiplate 30 in the front-rear direction. To this end, the half plate 30A is provided with an installation plate 33 that is bent inclined at the support inner plate 32, as shown in FIG. 10A, and the installation plate 33 has an order of the end surface. A fixing piece 34 provided with a fixing groove 34a for installing the plate 50 is formed.

The shield plate 50 is composed of a central fixing protrusion 51 and order blades 52 formed on both sides of the fixing protrusion 51, as long as the fixing protrusion 51 is for forming the multi-plate 30 It is installed in a shape that is inserted between each of the fixing grooves 34a provided in the pair of half plates 30A.

In this way, the shield plate 50 is installed during the process of coupling the multi-plate 30 to the guide block 10, and more specifically, as shown in Fig. 10 (a), the block body 10A is mutually It is installed during the process of installing the separated pair of half plates 30A, so that the shield plate 50 is not separated from the fixing groove 34a by pressing the separated pair of half plates 30A. Needs to be.

As a means for this, as shown in (b) of FIG. 10, a sealing hole 37 is provided on the upper side of the fitting fixing plate 31 of the half plate 30A. Accordingly, when the pressing rod 42 is inserted into the rod insertion hole 37 provided in each of the pair of half plates 30A and tightened with the pressing nut 43, the fixing pieces 34 on both sides are interposed therebetween. It is to pressurize the located water shield 50.

More specifically, when the multi-plate 30 is to be coupled to the guide block 10, first, the fitting fixing plate 31 of each half plate 30A is inserted and fixed to the fitting slit s. When the lower part is fixed, the upper part of the half plate 30A is inserted into the rod insertion hole 37, and then the two half plates 30A are pressed with the pressing nut 43, The gap between the opposite half plates (30A), more specifically, the gap between the fixing pieces (34) between the blocking plate (50) is narrowed, and the blocking plate (50) is pressed by the fixing pieces (34) on both sides. As a result, it is not easily separated from the multi-plate 30.

The shield plate 50 fixedly installed on the multi-plate 30 in the above-described manner may require integration with another adjacent shield plate 50 when a plurality of multi-guide blocks MB are jointly connected and used. have.

11 and 12 show examples of the structure of the shield plate 50 for this.

In the water shield plate 50 according to the embodiment of FIG. 11, a groove 53 is provided at one end of the upper and lower sides, and a protrusion 54 inserted into the groove 53 is formed at the other end thereof. When a plurality of the grooves 53 and the protrusions 54 are installed by extending a long joint of the multi-guide block (MB), the water shield plates 50 located in the upper and lower portions are integrated with each other so that a gap between the water shield plates 50 is formed. There is no room for it.

The shield plate 50 according to the embodiment of FIG. 12 is further provided with a connection hole 55 in the fixing protrusion 51. The connection hole 55, when a plurality of multi-guide blocks (MB) are installed by extending a long joint, is in contact with the connection hole 55 of the adjacent water shield plate 50 to communicate with each other. Therefore, by inserting both sides of the coupling rods 56 into the respective connecting holes 55 of the upper and lower water shield plates, these water shield plates 50 can have integrity. At this time, it is preferable to integrate the order blades 52 by applying an adhesive between the order blades 52 of the water shield plate 50.

Other than that, although not shown, only the grooves 53 are provided at both ends of the water shield plate 50, and when the upper and lower ends of the upper and lower water shield plates 50 come into contact, an adhesive liquid is inserted into the groove 53 to be integrated. You can also have sex.

13 to 21 show each step with respect to a construction method for constructing an underground continuous wall with increased water-repellency and joint (J) stiffness using the multi-guide block (MB) of the present invention described so far, which a) forming a preceding trench (T1); b) installing a multi-guide block (MB); c) building the preceding panel (P1); d) forming a trailing trench (T2); e) removing the block body 10A; f) Step of constructing a subsequent panel (P2); is included, and each step will be described in more detail as follows.

a) forming the preceding trench T1 (Fig. 13);

Prior to the formation of trenches (T1, T2) for constructing the underground continuous wall, guide walls (1) are installed around both sides thereof.

The guide wall (1) protects the ground around the trenches (T1, T2) from collapsing due to the impact of the excavator during the excavation process, and serves as a support for the rebar net (2) and the tremi pipe (3) to be installed in the future. It is constructed with reinforced concrete or steel frame.

When the installation of the guide wall 1 is completed, a trench cutter is mounted on the excavation equipment to excavate the ground so that the preceding trench T1 for constructing the preceding panel P1 is formed in the ground.

The excavation proceeds by injecting a stabilizer such as bentonite into the interior so that the empty wall does not collapse, and such a stabilizer must always be kept higher than the groundwater level during the working process.

In addition, when excavation is completed, the slime mixed in the stabilizer should be removed through desanding to prevent the quality of the concrete of the constructed underground continuous wall from deteriorating.

b) Multi-guide block (MB) installation step (Fig. 14, 15);

A multi-guide block (MB) is installed on at least one of the inner surfaces of both front and rear sides of the preceding trench (T1) where excavation and slime treatment have been completed.

At this time, the working openings 16 and 35 formed in the multi-guide block (MB) should be closed by using a filler that can be removed in the future so that concrete does not flow into the multi-guide block (MB) when placing concrete. Of course, it is okay to completely close the work openings 16 and 35 that are not used in the future, such as located at the bottom of the trench T1.

The installation work of the multi-guide block (MB) is performed in a state where the assembly head 60 is installed at the top, and when the installation work of the multi-guide block (MB) is completed, the assembly head 60 is separated and removed.

The multi-guide block (MB) installation in this step may be performed simultaneously with the rebar network (2) installation work in the next step. However, here, the multi-guide block (MB) is first installed, and then the reinforcing bar network (2) is installed as an example.

When the combination of the block main body and the multi-plate 30 is locked by the locking pin 41, the locking pin 41 may be removed immediately after the installation of the multi-guide block MB is completed.

In addition, when a plurality of multi-guide blocks (MB) are to be jointly connected, a connecting rod 13 installed on the end plate 11 of one block body 10A is provided on the end plate 11 of the other block body 10A. Inserted into the connection hole 14, and by inserting a fastening means such as a fastening bolt into each fastening hole (15a, 15b) of the end plates 11, which are in contact with each other, and fastened, the upper and lower multi-guide blocks (MB ) To integrate.

15 shows a specific example of a joint connection method between the multi-guide blocks (MB).

The joint connection between the multi-guide blocks MB is not only safe to be made outside of the trench T1, but also enables precise work. However, if these are first jointed and then inserted into the trench T1, the length of the jointly connected multi-guide block MB may be too long, so that insertion into the trench T1 itself may not be easy.

Therefore, as shown in FIG. 15, the lower multi-guide block MB is inserted into the trench T1, but the upper part protrudes to the outside of the trench T1, so that the joint connection operation is performed in the trench T1. It is desirable to solve the problem of the above length by making it directly above the T2), and to promote ease of operation, safety, and precision.

This will be described in more detail as follows.

First, as shown in Figure 15 (a), insert the multi-guide block (MB) to be located at the bottom into the inside of the trench (T1), but mount it in the mounting hole (19a) formed in the protruding piece (19) After the rod 23 is inserted, the mounting rod 23 is supported by the guide block 10 so that the locking pin 41 and the working openings 16 and 35 are exposed to the outside. To this end, a cradle 70 is further installed between the cradle 23 and the guide block 10.

When the lower multi-guide block (MB) is securely supported by the mounting rod 23 while the upper portion is exposed, the locking pin 41 is removed, and the work opening ( Remove the assembly head 60 through 16,35).

Next, as shown in (c) of FIG. 15, in a state in which the upper multi-guide block (MB) is suspended using the assembly head 60, the lower end thereof is mounted by the mounting rod 23. After intimate contact with the lower multi-guide block (MB) exposed only the upper part, the upper and lower multi-guide blocks (MB) using the connection rod 13, the connection hole 14, and each fastening hole (15a, 15b) as described above. Connect the joint.

At this time, it is preferable to integrate the upper and lower shield plates 50 by using the aforementioned means of the groove 53 and the protrusion 54, or the means of the connecting hole 55 and the coupling rod 56.

c) the step of constructing the preceding panel P1 (Figs. 16 and 17);

When the installation of the multi-guide block (MB) is completed, the reinforcing bar network (2) is installed and fixed inside the preceding trench (T1), and after inserting the tremi pipe (3), the concrete inside the preceding trench (T1) is pulled out. Pour.

At this time, a vibration device 4 provided with a vibration rod 4a is installed outside the trench T1, and a hook muscle 2a installed on the upper end of the reinforcing bar 2 is mounted on the vibration rod 4a. The reinforcing bar (4a) maintains the correct position by the reinforcing bar (4a), and by allowing vibration to be transmitted to the hook (2a) when concrete is poured, it is possible to make compaction in the poured concrete.

d) forming a trailing trench (T2) (Fig. 18);

When the poured concrete is cured to express the required strength, a trailing trench (T2) for constructing a trailing panel (P2) to be built adjacent thereto is formed. The process of forming the trailing trench T2 is not different from that of the preceding trench T1.

Due to excavation for formation of the trailing trench T2, the block body 10A of the multi-guide block MB attached to the preceding panel P1 is exposed to the outside.

e) removing the block body 10A (FIG. 19);

The block body 10A of the multi-guide block MB exposed while attached to the preceding panel P1 by the formation of the trailing trench T2 is separated from the multi-plate 30 and removed.

To this end, first, a trench cutter or the like is used to remove the hardened concrete leaking through the gap between the trench T1 and the multi-guide block MB, thereby facilitating the separation of the block body 10A.

In addition, after removing the filler from the working openings 16 and 35 located on the upper part of the multi-guide block MB, the assembly head 60 is placed on the upper end of the block body 10A using the working openings 16 and 35. Install. Of course, if the locking pin 41 is present, it can also be removed through the working openings 16 and 35.

Next, insert the suspension hook installed on equipment such as a crane into the suspension hole of the assembly head 60 integrated with the block body 10A, and pull it to the rear, the block body 10A is easily removed from the multiplate 30. Separated.

When the block body 10A is removed from the preceding panel (P1), the rear of the multi-plate (30) is followed by a state in which the one-side joint bar (38) protrudes along with the one-side order wing (52) of the water plate (50). It is exposed into the trench T2. The order wing 52 and the joint bar 38 exposed as described above are embedded in the trailing panel P2 constructed in the next step, so that the joint J with improved rigidity and high order performance can be formed.

f) Construction of the trailing panel P2 (Figs. 20 and 21);

In the same manner as in step c) described above, the reinforcing bar mesh 2 is inserted into the trailing trench T2 and concrete is poured to construct the trailing panel P2 having structural integrity with the preceding panel P1.

The construction of the underground continuous wall is completed by repeating each of the above steps.

In the above, the present invention has been described in detail with reference to specific embodiments, but the embodiments are only examples for making the present invention easier to understand, so those of ordinary skill in the art will have the scope of the technical idea of the present invention. It is obvious that it will be possible to implement this in various ways. Therefore, such modified examples will be said to belong to the scope of the present invention as described in the claims.

One; Guide wall 2; Rebar mesh
2a; Hook muscle 3; Tremi Hall
4; Vibration device 4a; Vibration rod
10; Guide block 10A; Block body
11; End plate 12; shroud
13; Connecting rod 14; Connection hole
15a, 15b, 62; Fastening holes 16,35; Work opening
17,36; Pingo precision 18; Reinforcement wall
19; Protruding piece 20; Gripper
21; Support piece 22; Pressure piece
30; Multiplate 30A; Half plate
31; Fitting plate 32; Support inner plate
33; Mounting plate 34; Fixed piece
34a; Fixing groove 37; Sealing hole
38; Eumbong Lee 41; Locking pin
42; Crimping rod 43; Pressure nut
44; Wedge member 50; Order plate
51; Fixed projection 52; Order wing
53; Groove 54; spin
60; Assembly head 60A; Joint
60B; Suspension flight 60C; Reinforcement piece
61; Insertion hole 63; Suspension Hall
P1,P2; Panels T1,T2; Trench
s; Fitting slit MB; Multi Guide Block

Claims (15)

It is installed in the front or rear of the excavated trenches (T1, T2) to build the underground continuous wall,
Guide block 10,
It consists of a multi-plate 30 that is detachably coupled to the guide block 10 and is buried in the joint J between the panel P1 and the panel P2 forming an underground continuous wall,
The multi-plate 30 is provided with a shield plate 50 and a connecting rod 38 in both front and rear directions, respectively,
The guide block 10 includes a block body 10A formed by combining a pair of end plates 11 located at both ends of the upper and lower ends and a pair of side plates 12 located at both left and right sides, and the block body ( It is made of a supporting shell plate 10B that is positioned at the rear of 10A) and has protruding pieces 19 formed on both sides of the block body 10A,
The protruding piece 19 is provided with a gripper 20 to form a fitting slit (s) between the side plate 12 and the gripper 20,
The multi-plate 30 is configured by combining a pair of half plates 30A comprising a fitting fixing plate 31 and a support inner plate 32 bent horizontally thereto,
A multi-guide block, characterized in that the multi-plate 30 is detachably coupled to the guide block 10 by inserting the fixing plate 31 into the fitting slit (s). delete The method of claim 1,
The joint rod 38 is vertically installed in the front and rear of the support inner plate 32,
The water shield plate (50) is a multi-guide block, characterized in that it is fixedly installed by a fixing piece (34) provided on the installation plate (33) bent in the support inner plate (32). The method of claim 1,
The gripper 20 is an elastic member consisting of a support piece 21 fixed to the support shell plate 10B, and a pressing piece 22 that is extended and bent from the support piece 21 and has a free end. Multi-guide block characterized by. The method of claim 1,
A connecting rod 13 is installed on one end plate 11 of the block body 10A,
A multi-guide block, characterized in that the other end plate (11) of the block body (10A) is provided with a connection hole (14) into which the connecting rod (13) is inserted. The method of claim 1,
Fastening holes 15a and 15b are provided in the end plate 11 of the block body 10A,
The side plate 12 of the block body 10A is provided with an inner working opening 16 for fastening work for the fastening holes 15a, 15b,
A multi-guide block, characterized in that the fitting fixing plate (31) of the half plate (30A) is provided with an outer working opening (35) that matches the inner working opening (16). The method of claim 1,
The side plate 12 of the block body 10A is provided with an inner pin fixing hole 17,
The fitting fixing plate 31 of the half plate 30A is provided with an outer pin fixing hole 36 that matches the inner pin fixing hole 17,
A multi-guide, characterized in that the multi-plate 30 installed in the guide block 10 is prevented from being separated by being locked by the locking pin 41 installed through the inner and outer pin fixing holes 17 and 36 together. block. The method of claim 1,
A rod insertion hole 37 is provided in the fitting fixing plate 31 of the half plate 30A, and mutually by a pressing rod 42 inserted into the rod insertion hole 37 and a pressing nut 43 fastened thereto. A multi-guide block, characterized in that the shield plate 50 is fixedly installed while the gap between the opposite half plates 30A is narrowed. The method of claim 1,
Multi-guide block, characterized in that the mounting hole (19a) is formed in the protruding piece (19). The method of claim 1,
The water shield plate (50) is a multi-guide block, characterized in that the groove (53) is provided at one end of the top and bottom, and a protrusion (54) inserted into the groove (53) is formed at the other end. The method of claim 1,
A multi-guide block, characterized in that a connection hole (55) is formed in the fixing protrusion (51) of the shield plate (50). As using the multi-guide block (MB) according to any one of claims 1, 3 to 11,
a) excavating the ground to form a preceding trench (T1) for building the preceding panel (P1);
b) installing a multi-guide block (MB) on at least one of the inner surfaces of both front and rear sides of the preceding trench (T1);
c) inserting a reinforcing bar net (2) into the preceding trench (T1) and pouring concrete;
d) forming a trailing trench (T2) for constructing a trailing panel (P2) such that the block body (10A) of the multi-guide block (MB) is exposed;
e) removing the block body (10A) by separating the block body (10A) and the multi-plate (30) of the multi-guide block (MB);
f) inserting the reinforcing bar net (2) into the trailing trench (T2) and pouring concrete; the method of constructing an underground continuous wall comprising: The method of claim 12,
The step b) is performed in a state where the assembly head 60 is installed on the top of the multi-guide block (MB),
The assembly head 60 is a junction piece (60A) provided with an insertion hole (61) and a fastening hole (62), and is vertically installed in the bonding piece (60A) and a suspension hole (63) It consists of a piece (60B),
The connecting rod 13 installed on the end plate 11 of the block body 10A is inserted into the insertion hole 61 of the assembly head 60, and is provided on the end plate 11 and the joining piece 60A. Construction of an underground continuous wall, characterized in that the assembly head 60 is integrated with the multi-guide block (MB) by fastening the end plate 11 and the joining piece (60A) through the holes (15a, 62). Way. The method of claim 12,
In step b), a plurality of multi-guide blocks (MB) are jointly connected and installed,
The connection of the upper and lower multi-guide blocks (MB) is a connection hole (14) provided in the end plate (11) of the other block body (10A) with a connecting rod (13) installed on the end plate (11) of one block body (10A) A method of constructing an underground continuous wall, characterized in that the end plates 11 are inserted into and contacted with each other through fastening holes 15a and 15b provided thereto. The method of claim 14,
The joint connection of the plurality of multi-guide blocks MB in the step (b) is performed so that the operation openings 16 and 35 of the multi-guide block MB are exposed to the outside of the trench T1. A method of constructing an underground continuous wall, characterized in that the block MB is inserted into the trench T1.

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