KR101685114B1 - Underground diaphragm wall using embedded plates and coupler and contructing method thereof - Google Patents

Abstract

Disclosed are an underground continuous wall using buried hardware and a coupler, and a construction method thereof. The underground continuous wall comprises: a baffle wall installed in an excavation space; a support plate provided to one surface of the baffle wall to enable at least a portion to be buried by the baffle wall; a coupler of which one end is fixated to the support plate and the other end has an insertion groove; and a connection member inserted into the insertion groove to be fixated for slab construction.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground continuous wall and a method of constructing the same,

The present invention relates to an underground continuous wall using a metal fitting and a coupler, and a construction method thereof.

In general, the underground continuous wall method is a cast-in-place pile method in which a reinforced concrete wall is continuously formed in the ground, and is also called a slurry wall method or a diaphragm method.

Such an underground continuous wall method can be utilized as a foundation of a dam, or as a role of an earthquake-proof wall, a barrier wall, a vibration barrier wall, a construction of an underground structure of a building, and a main wall.

In order to construct an underground continuous wall, first place a guide wall on the ground according to the thickness and location of the design wall, fill it with stabilizer, and excavate it to a certain depth. Since the stabilizing liquid has a specific gravity higher than that of water, it can prevent collapse of the excavation surface, penetrate into the soil porosity of the excavation surface, and form a catchment film, thereby enhancing the effect of the groundwater flow.

After the excavation is completed, surging is performed to remove the remaining ground particles in the trench, and a reinforcing assembly composed of a reinforcing net and a tremie pipe are sequentially installed in the trench. One element is completed by pouring the concrete and recovering the stabilizing liquid. In the same way, the elements are successively installed to form a reinforced concrete wall in the ground.

1 to 3, a dowel bar 30 is folded on the reinforcing bar assembly 10 through the styrofoam 20 to stretch the reinforcing bar 30 to form the slab reinforcement 30, And concrete is placed in the reinforcing bars for slabs to which the connecting reinforcing bar 30 is connected.

However, in order to connect the joint reinforcing bars 30 to the reinforcing bars for slabs, the styrofoam 20 must be removed from the reinforcing bar assembly 10 composed of the reinforcing bars 11. At this time, Styrofoam 20 may reduce bond strength between the underground continuous wall and the slab.

In addition, damage and fatigue may occur in the joint reinforcement 30 in the process of stretching the joint reinforcement 30, which is bent 90 degrees to the rebar assembly 10, and the durability and quality of the structure may be deteriorated.

Particularly, in order to connect the rebar to the rebar for the slab, it is necessary to work on the rebar assembly by spreading the rebar and removing the styrofoam. As a result, .

Patent Registration No. 10-1216716 (registered on December 21, 2012)

Embodiments of the present invention can provide an underground continuous wall and a method of constructing an underground continuous wall using a fillet steel material and a coupler capable of improving an adhesion force and a binding force between an underground continuous wall and a slab structure as an environmentally friendly construction method, .

An underground continuous wall using a coupler according to an aspect of the present invention includes: a diaphragm wall installed in a digging space; A support plate provided on one surface of the diaphragm wall body such that at least a portion thereof is embedded in the diaphragm wall body; A coupler having one end fixed to the support plate and the other end formed with an insertion groove; And a joint member fixed to the insertion groove for slab construction.

At this time, the diaphragm wall may be manufactured by placing concrete in a state where a reinforcing bar assembly composed of a reinforcing net is inserted into the excavation space.

The support plate may be fixed to the reinforcing bar assembly of the diaphragm wall through an anchor such that one side thereof is exposed on one side of the diaphragm wall body.

The insertion groove may be formed with a female screw thread capable of rotating with the end of the coupling element.

The apparatus may further include a protection plate mounted on the support plate to selectively cover the portion where the coupler is fixed.

According to an aspect of the present invention, there is provided a method of constructing an underground continuous wall using a coupler, the method comprising: excavating the ground to form a excavation space; Inserting a reinforcing assembly provided with a support plate into the excavation space; Placing the diaphragm wall by pouring and curing concrete into the reinforcing bar assembly inserted in the excavation space; Fixing the coupler to the support plate exposed in the diaphragm wall by excavating the surrounding ground of the diaphragm wall; And connecting a coupling member for slab construction to the coupler.

At this time, cleaning the concrete attached to the surface of the support plate after the step of installing the diaphragm wall, and marking the support plate for marking the fixing of the coupler.

In addition, the step of connecting the coupling member to the coupler may include rotating the coupling member by inserting the end of the coupling member into the insertion groove of the coupler.

In the embodiments of the present invention, the concrete is laid in the slab after the reinforcing structure is completed by lapping the reinforcing bars for the slab to the coupler, and the reinforced concrete structure is integrally rotated with the underground continuous wall and the slab structure, It is possible to realize integration between the underground continuous wall and the slab structure without the need to fold and unfold the rebar in the assembly, and the durability and quality of the structure can be improved.

Further, since the embodiments of the present invention do not require a process of chipping (depth of about 6 mm) of the joint reinforcing bar portion of the conventional diaphragm wall body for integrating the diaphragm wall (underground continuous wall) and the basement slab structure, It is advantageous in that it can be distinguished from the conventional technology in terms of high quality maintenance, environment-friendly operation, shortening of air, and cost reduction because there is no unnecessary unit work type.

In addition, since embodiments of the present invention do not require removal of foreign substances such as styrofoam from the conventional reinforcing bar assembly, it is possible to prevent the binding force between the underground continuous wall and the slab from being lowered due to the styrofoam residue that is not completely removed from the reinforcing bar assembly It has the advantage of being able to provide an environmentally friendly method.

FIG. 1 is a perspective view showing a reinforcing bar assembly equipped with styrofoam according to the prior art. FIG.
2 is a side cross-sectional view showing a state in which styrofoam is mounted on a reinforced concrete assembly in which concrete is installed according to a conventional technique.
3 is a side cross-sectional view illustrating a state in which styrofoam is removed from a reinforced concrete assembly in which concrete is installed according to a related art.
FIG. 4 is a side cross-sectional view illustrating an underground continuous wall using a filler metal and a coupler according to an embodiment of the present invention. FIG.
FIG. 5 is a perspective view illustrating an underground continuous wall using a filler metal and a coupler according to an embodiment of the present invention. FIG.
6 is a perspective view illustrating an underground continuous wall using a filler metal and a coupler according to another embodiment of the present invention.
7 is a block diagram illustrating a method of constructing an underground continuous wall using a buried hardware and a coupler according to an embodiment of the present invention.
8 is a state diagram illustrating a process of forming an excavation space in an underground continuous wall construction method using a buried hardware and a coupler according to an embodiment of the present invention.
9 is a state diagram illustrating a process of inserting a reinforcing bar assembly into an excavation space in an underground continuous wall construction method using a buried hardware and a coupler according to an embodiment of the present invention.
10 is a state diagram showing a process of constructing a diaphragm wall in a method of constructing an underground continuous wall using a buried hardware and a coupler according to an embodiment of the present invention.
11 is a state view showing a process of exposing a supporting plate of a diaphragm wall in a method of constructing an underground continuous wall using a metal fitting and a coupler according to an embodiment of the present invention.
FIG. 12 is a state diagram showing a process of installing a coupler and a coupling member on a support plate in a method of constructing an underground continuous wall using a metal fitting and a coupler according to an embodiment of the present invention.
13 is a view showing a process of forming a slab by placing and curing concrete in a joint member in a method of constructing an underground continuous wall using a filler metal and a coupler according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, configurations and operations according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE INVENTION The following description is one of many aspects of the claimed invention and the following description may form part of the detailed description of the invention. However, the detailed description of known configurations or functions in describing the present invention may be omitted for clarity.

While the invention is susceptible to various modifications and its various embodiments, it is intended to illustrate the specific embodiments and the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

And terms including ordinals such as first, second, etc. may be used to describe various elements, but the constituent elements are not limited by such terms. These terms are used only to distinguish one component from another. It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

FIG. 4 is a side cross-sectional view illustrating an underground continuous wall using a filler metal and a coupler according to an embodiment of the present invention, FIG. 5 is a view illustrating an underground continuous wall using a filler metal and a coupler according to an embodiment of the present invention It is a perspective view.

4 to 5, an underground continuous wall 100 using a buried hardware and a coupler according to an embodiment of the present invention includes a partition wall 111, a support plate 120, a coupler 130, Member 140 as shown in FIG.

In the present embodiment, the underground continuous wall 100 is used as a wall for constructing an underground structure of a building, but is not limited thereto, and may be modified and applied in various forms. For example, the underground continuous wall 100 disclosed in the present embodiment may be used as an earth retaining wall or a water barrier wall, or used for an underground driveway, an underground tunnel, or a dam.

Specifically, the diaphragm wall body 111 is provided on the excavation space 1 formed in the ground through excavation, more specifically, on the excavation side wall of the excavation space 1 to prevent collapse of the excavation surface, have.

The diaphragm wall body 111 is a wall formed by combining a reinforcing bar assembly and concrete (not shown), and can be manufactured by placing concrete in a reinforcing bar assembly inserted in the excavation space 1 (see FIG. 10). For example, the diaphragm wall body 111 can be manufactured by putting a reinforcing bar assembly made of a reinforcing net into the excavation space 1 according to the thickness and position of the provided design wall and pouring concrete from the lower end of the excavation space 1 have.

The diaphragm wall body 111 can be continuously manufactured in the excavation space 1 divided / set for each element, and the continuously constructed diaphragm wall body 111 is composed of a reinforced concrete wall for constructing an underground structure of the structure .

On one surface of the diaphragm wall body 111, a part of the support plate 120 may be embedded by concrete. Here, one surface of the diaphragm wall body 111 may be defined as a surface of the diaphragm wall body 111 facing the direction in which the slab is formed.

The support plate 120 may be an embedded plate fixed to the reinforcing bar assembly 111 of the diaphragm wall body 111 so as to be exposed on one side of the diaphragm wall body 111. For example, one surface of the support plate 120, that is, a surface where coupling with the coupler 130 is formed, is exposed to one surface of the diaphragm wall body 111, and the other surface of the support plate 120 is anchor bolt And a gap retaining member 102, and can be filled with concrete. In addition to the anchor bolts for the fillets, various types of fastening devices can be used as fastening means for fastening the support plate 120 to the steel assembly.

A coupler 130 may be coupled to one surface of the support plate 120.

The coupler 130 is a coupling means for fixing the coupling member 140 for slab construction to the support plate 120, and may be a coupler for a coupling steel bar. In this coupler 130, one end of the coupler 130 may be coupled to one surface of the support plate 120 through welding. At this time, an insertion groove 131 may be formed at the other end of the coupler 130 to engage with the end of the coupling member 140. The insertion groove 131 may be rotationally coupled to the end of the coupling member 140 via a female thread or may be coupled to the end of the coupling member 140 in a forced fit manner.

The joint member 140 is a reinforcing steel for slabs for slab construction and may be fixedly inserted into the insertion groove 131 of the coupler 130. At this time, a male screw thread capable of rotational coupling with the female thread of the insertion groove 131 may be formed at the end of the joint member 140.

Meanwhile, when the diaphragm wall body 111 is manufactured by pouring concrete into the reinforcing bar assembly, the concrete may be adhered to the surface of the support plate 120 installed on one side of the reinforcing bar assembly. At this time, Even if the concrete is removed, the concrete may partially remain on the surface of the support plate 120. Here, the concrete remaining on the surface of the support plate 120, in particular, the portion where the coupler 130 is fixed, may lower the bonding force between the coupler 130 and the support plate 120.

In another embodiment, it is possible to provide a configuration for keeping the machined surface of the support plate 120 on which the coupler 130 is fixed smooth and clean, in order to improve the coupling force between the coupler 130 and the support plate 120.

6 is a perspective view illustrating an underground continuous wall using a filler metal and a coupler according to another embodiment of the present invention.

6, an underground continuous wall using a filler metal and a coupler according to another embodiment includes a diaphragm wall body 111, a support plate 120 ', a coupler 130, a joint member 140, and a protection plate 150 ). The diaphragm wall body 111, the coupler 130, and the coupling member 140, except for the support plate 120 'and the protection plate 150, may have the same structure as the diaphragm wall body 111, The coupler 130 and the coupling member 140 are the same as those of the coupler 130 and the coupling member 140, detailed description thereof will be omitted.

The protection plate 150 is detachably mounted on the support plate 120 'and the protection plate 150 is disposed on one side of the support plate 120', more specifically, on the support plate 120 'so as to surround the portion where the coupler 130 is fixed. ). ≪ / RTI > To this end, the protection plate 150 has an area enough to cover a portion where the coupler 130 is fixed, and a coupling piece 151 may be provided at the edge of the protection plate 150. The engaging pieces 151 may have a protruding structure protruding from both side edges of the protecting plate 150 and may be fixed to the engaging grooves 121 of the supporting plate 120 '.

Since the protective plate 150 is made of a material having a predetermined elasticity and the engaging pieces 151 of the protective plate 150 are engaged with the engaging grooves 121 of the support plate 120 ' And can be engaged with each other. To this end, the protective plate 150 may be made of a thin plate of bendable material, or may be made of a stainless steel plate. Of course, the present invention is not limited thereto, and the protective plate 150 may be made of any material capable of selectively fixing the coupling piece 151 to the coupling groove 121 of the support plate 120 '.

The support plate 120 'may have a coupling groove 121 into which the coupling piece 151 of the protection plate 150 can be inserted. For example, the support plate 120 'may be provided with a plurality of coupling grooves 121 spaced around a portion where the coupler 130 is fixed.

Accordingly, when the coupler 130 is fixed to the support plate 120 ', if the protection plate 150 partially holding the concrete is removed from the support plate 120', the support plate 120 'to which the coupler 130 is fixed A smooth and clean machined surface can be maintained at the fixed part.

FIG. 7 is a block diagram illustrating a method for constructing an underground continuous wall using a filler metal and a coupler according to an embodiment of the present invention. FIG. 8 is a cross-sectional view of a subterranean continuous wall construction using a filler metal and a coupler according to an embodiment of the present invention. FIG. 9 is a view illustrating a process of inserting a reinforcing bar assembly into a digging space in a method of constructing an underground continuous wall using a buried hardware and a coupler according to an embodiment of the present invention. 10 is a state view showing a process of constructing a diaphragm wall in a method of constructing an underground continuous wall using a metal fitting and a coupler according to an embodiment of the present invention, FIG. 12 is a view illustrating a process of exposing a support plate of a diaphragm wall in a method of constructing an underground continuous wall using a filler metal and a coupler according to an embodiment of the present invention. FIG. 13 is a view illustrating a process for installing a coupler and a coupling member on a support plate in a method for constructing an underground continuous wall using a plug, FIG. 13 is a flowchart illustrating a method for constructing an underground continuous wall using a fillet and a coupler according to an embodiment of the present invention, And a concrete slab is formed by pouring and curing concrete into a joint member.

As shown in FIG. 7, an underground continuous wall construction method using a buried hardware and a coupler according to an aspect of the present invention includes a step S100 of forming an excavation space, a step S200 (S300) of mounting the diaphragm wall, fixing the coupler (S400) to the support plate, and connecting the coupling member to the coupler (S500).

As shown in FIG. 8, the excavation space forming step S100 excavates a ground on which a building is placed to form a excavation space 1 for building an underground structure. At this time, excavation equipment (for example, Bucket, BC Cutter ...) suitable for excavation with a predetermined depth for excavation can be used, and a stabilizing liquid (bentonite ...) for preventing collapse of excavation surface and forming a water- It can be put into the excavation space.

As shown in FIG. 9, in step S200 of inserting the reinforcing bar assembly into the excavation space, the manufactured reinforcing bar assembly is inserted into the excavation space. Here, the reinforcing bar assembly is a reinforcing net composed of a vertical reinforcing bar and a horizontal reinforcing bar on the ground, and can be manufactured in a shape corresponding to the excavation space 1. The reinforcing bar assembly can be manufactured by attaching an anchor bolt (101) 120 may be welded and attached.

As shown in FIG. 10, in the step S300 of constructing the diaphragm wall body, the diaphragm wall body 111 is installed by pouring concrete into the reinforcing bar assembly inserted into the excavation space. At this time, the concrete can be poured from the lower end of the excavation space 1 through the trapezium pipe inserted into the excavation space.

When one diaphragm wall body 111 is constructed in the excavation space 1, a plurality of diaphragm walls 111 are put into a divided / established excavation space per element to form excavation space 1 in the same manner as the above- A reinforced concrete wall may be formed in the basement of the building.

11, when the concrete curing of the reinforced concrete wall is completed, the concrete adhered on the support plate 120 of the diaphragm wall body 111 is removed while the basement layer is gradually removed, so that the diaphragm wall 100 Of the support plate 120 is exposed.

Particularly, foreign matter adhering to the surface of the support plate 120 can be cleaned so that the coupler 130 can be effectively fixed to the support plate 120 before the coupler 130 is fixed to the support plate 120. Also, an indication for fixing the coupler 130, for example, an indication related to the fixed position, number, dimensions, etc., may be marked on the surface of the support plate 120.

According to another embodiment, when the protection plate 150 is mounted on the support plate 120, the protection plate 150 can be separated from the support plate 120, and without removing the foreign substances on the surface of the support plate 120, The support plate 120 can be provided with a clean machined surface to which the support plate 130 is fixed.

12, in the step S400 of fixing the coupler to the support plate, the coupler 130 is fixed to the support plate 120 exposed to the diaphragm wall body 111. As shown in FIG. At this time, each of the couplers 130 may be fixed to one surface of the support plate 120 through welding.

The step S500 of connecting the coupling member to the coupler connects the coupling member 140 for slab construction, for example, the reinforcing bars for the slab to the coupler 130. [ At this time, since the end of the coupling member 140 is fitted to the insertion groove 131 of the coupler 130, the coupler 130 can be lapped on the coupling member 140.

13, the slab structure S can be formed by pouring and curing concrete in the joint member 140. As shown in FIG. To accomplish this, in the state where a mold for forming the slab structure S is formed on the lower part of the support plate 120, the different joint members 140 and 140 'are connected to each other, and the joint members 140, The concrete can be poured into the concrete pipe 140 '. Thereby, the diaphragm wall body 111 and the slab structure S can be integrated.

As described above, the present invention can be applied to a conventional underground continuous wall construction method, for example, a step of stretching a 90-degree jointed reinforced concrete bar, a step of chipping concrete on the underground continuous wall structure to maintain the integrated structure of the slab structure, ) Step, and the step of removing foreign matters such as the styrofoam used in the bending of the 90-degree bending reinforcement are eliminated, so that it is possible to maintain high quality, eco-friendly operation, shorten the air, and reduce the cost And the like.

It is to be understood that the embodiments described above are merely illustrative of some examples of the technical idea and the scope of the technical idea is not limited to the described embodiments, It will be understood that various changes, substitutions, and alterations may be made therein without departing from the spirit and scope of the invention.

100: underground continuous wall 111: diaphragm wall
112: Concrete 120, 120 '
130: Coupler 140, 140 '
150: Shield plate

Claims (9)

A diaphragm wall manufactured by placing concrete in a reinforcing bar assembly in a state that a reinforcing bar assembly composed of a reinforcing net is inserted into the excavation space;
A support plate provided on one surface of the diaphragm wall body such that at least a portion thereof is embedded in the diaphragm wall body;
A coupler having one end fixed to one surface of the support plate and the other end formed with an insertion groove;
An anchor bolt provided on the other surface of the support plate to be fixed to the reinforcing bar assembly;
A joint member fixed to the insertion groove for slab construction; And
And a gap holding member provided on the other surface of the support plate for maintaining a gap between the other surface of the reinforcing bar assembly and the support plate,
The coupler
When the support plate is exposed from the surface of the diaphragm wall cured of concrete, the foreign matter on the surface of the support plate is removed and welded to one surface of the support plate in accordance with the installation position of the coupling member for slab installation ,
The slab structure is formed in the joint member by pouring concrete and curing,
The support plate is fixed to the reinforcing bar assembly of the diaphragm wall through an anchor bolt for a fillet metal so that one side thereof is exposed on one side of the diaphragm wall body,
And a coupling member for coupling the diaphragm wall and the slab structure to the coupling member, wherein the coupling member is inserted into the coupling groove of the coupler, and another coupling member for coupling the slab structure is connected to the coupling member. Underground continuous wall. delete delete The method according to claim 1,
Wherein the insertion groove is formed with a female screw thread capable of rotating with the end of the coupling member, and a coupler. The method according to claim 1,
And a protection plate mounted on the support plate to selectively surround a portion where the coupler is fixed,
The underfloor continuous wall is provided with a coupling piece protruding from both side edges of the protection plate, and a coupling groove in which the coupling piece is fitted and fixed is formed on the support plate. Excavating the ground to form a excavation space;
Inserting a reinforcing assembly provided with a support plate into the excavation space;
Placing the diaphragm wall by pouring and curing concrete into the reinforcing bar assembly inserted in the excavation space;
Cleaning the concrete attached to the surface of the support plate;
Marking the support plate with a mark for securing the coupler;
Fixing the coupler to the support plate exposed in the diaphragm wall;
Connecting a coupling member for slab installation to a coupler;
Placing and curing concrete in the joint member to form a slab,
Wherein marking the support plate comprises:
A mark for fixing the coupler is marked on one surface of the support plate in accordance with an installation position of the joint member for slab construction,
The step of fixing the coupler to the support plate may include:
The coupler is welded to one surface of the support plate in accordance with the marked indication,
Wherein forming the slab comprises:
A concrete structure for forming a slab structure is formed in the lower part of the support plate, another joint member for constructing the slab structure is connected to a joint member inserted in the insertion groove of the coupler, concrete is inserted into the joint member, Wherein the slab structure is integrally formed with a metal fitting and a coupler. delete The method according to claim 6,
Wherein coupling the coupling member to the coupler comprises:
And an end portion of the coupling member is inserted into the insertion groove of the coupler and is wrapped. delete

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