KR102242163B1 - Waterproofing block assembly used to water stop construction for forming underground continuous wall and connecting method for the same - Google Patents

Abstract

Disclosed are a waterproofing block assembly used in water stop construction for forming an underground continuous wall and a method for constructing an underground continuous wall by using the same. The waterproofing block assembly comprises: a rear plate extending in a vertical direction; and a body part protruding forward from the rear plate, having a groove formed in the front surface thereof to insert a water stop material, and having stress material insertion holes formed in both front surfaces of the groove, respectively, to communicate with the front surface of the rear plate. The stress material insertion holes are formed in a size at which a joint part stress material disposed to cover the discontinuity of a reinforcing bar in a joint part between adjacent continuous underground walls when the underground continuous walls are formed can be inserted. The water block assembly further includes a temporary fixing part for temporarily fixing the stress material in a state in which a rear end of the stress material is inserted into the stress material insertion hole. The temporary fixing part is provided to have a temporary fixing force smaller than a fixing force by concrete while the front end of the stress material protruding forward than the stress material insertion hole is embedded in the concrete.

Description

Waterstop block assembly used for water stop construction for underground continuous wall formation, and underground continuous wall construction method using the same {WATERPROOFING BLOCK ASSEMBLY USED TO WATER STOP CONSTRUCTION FOR FORMING UNDERGROUND CONTINUOUS WALL AND CONNECTING METHOD FOR THE SAME}

The present application relates to a water stop block assembly used in the construction of a water stop for forming a continuous underground wall, and a method of constructing a continuous underground wall using the same.

In general, a construction method for forming a diaphragm wall (underground continuous wall) is formed into a single structure by connecting panels formed separately from each other due to the characteristics of the construction method.

By the way, according to the existing construction method, there was a weak section in terms of seismic design because there was an unrooted section between the panel and the panel. In particular, as the seismic design standards of buildings were recently revised (2019), the underground structures connected to the ground floor of the building were also designated as seismic design targets, and the seismic design reflection is also required for diaphragm wall construction.

Accordingly, there is a need to newly implement a diaphragm wall construction method that satisfies the seismic design standard and can easily perform construction and secure economic feasibility at a certain level or higher.

The technology behind the present application is disclosed in Korean Patent Publication No. 10-1318202.

The present application is to solve the problems of the prior art described above, it is applied to the construction of the underground continuous wall (diaphragm wall), it is possible to remove or minimize (reduce) the unrooted section of the continuous underground wall, and accordingly, meet the seismic design criteria. It is an object of the present invention to provide a water-stop block assembly and a method of constructing an underground continuous wall using the same.

However, the technical problems to be achieved by the embodiments of the present application are not limited to the technical problems as described above, and other technical problems may exist.

As a technical means for achieving the above technical problem, the index block assembly according to an aspect of the present application, the rear plate extending in the vertical direction; And a water-stop material insertion groove protruding forward from the rear plate, and a water-stop material insertion groove into which the water-stop material is inserted in the front surface, and a stress material insertion hole communicating with the front surface of the rear plate is formed in each of the front surfaces of both sides of the water-stop material insertion groove. Including a body portion, wherein the stress material insertion hole is formed in a size capable of inserting a joint stress material disposed to cover the reinforcement discontinuity of the joint between adjacent underground continuous walls when the underground continuous wall is formed, The water-stop block assembly further includes a temporary fixing part for temporarily fixing the stress material in a state in which the rear end of the stress material is inserted into the stress material insertion hole, the temporary part further forward than the stress material insertion hole It may be provided so that the front end portion of the protruding stress member has a temporary clamping force smaller than the clamping force of the concrete in a state embedded in the concrete.

The underground continuous wall construction method according to one aspect of the present application includes: (a) the stress material is inserted into the stress material insertion hole to form the excavation space and the rear surface of the rear plate faces one side wall of the excavation space. Arranging the water block assembly; (b) placing and pouring a reinforcing bar network for panel formation in the excavation space; (c) forming the trailing excavation space on one side of the excavation space; (d) separating and removing the water block assembly from the stress material; And (e) arranging and pouring a reinforcing bar network for forming a trailing panel in the trailing excavation space.

The above-described problem solving means are merely exemplary and should not be construed as limiting the present application. In addition to the above-described exemplary embodiments, additional embodiments may exist in the drawings and detailed description of the invention.

According to the above-described problem solving means of the present application, the stress material is inserted into the hole for inserting the stress material and the water-stop block assembly in which the water-stop material is inserted into the water-stop material insertion groove is disposed in the excavation space, and the reinforcing bar network for the other side of the box structure in the excavation space Insertion and pouring are performed, and a preceding panel can be formed, and after that, a trailing panel can be formed by forming a trailing excavation space, removing the main water block assembly, inserting and pouring a reinforcing bar mesh into the trailing excavation space. , Since the front end of the stress member is embedded in the concrete of the preceding panel and the rear end of the stress member is embedded in the concrete of the subsequent panel, the preceding panel and the following panel can be connected by the stress member. Accordingly, an underground continuous wall in which the unrooted section is removed or minimized (reduced) can be implemented with a simple construction. In addition, the underground continuous wall secured to the order effect by the water-stop material can be implemented.

1 is a schematic front view of an index block assembly according to an embodiment of the present application.
2 is a schematic side view of an index block assembly according to an embodiment of the present application.
3 is a schematic cross-sectional view of an index block assembly according to an embodiment of the present application into which a stress material is inserted.
4 to 7 are schematic conceptual cross-sectional views for explaining the construction of an underground continuous wall using an index block assembly according to an embodiment of the present application.
8 is a schematic perspective view of an elastic packing unit of the index block assembly according to an embodiment of the present application.
9 is a schematic perspective view of a wedge-shaped elastic packing unit of an index block assembly according to an embodiment of the present application.
10 is a schematic perspective view of an elastic packing unit consisting of a plurality of members of the index block assembly according to an embodiment of the present application.
11 is a schematic side view of the water block assembly according to an embodiment of the present application in which the pipe member is disposed obliquely.
12 is a schematic cross-sectional view of an index block assembly according to an exemplary embodiment of the present disclosure into which a stress member provided with an extension part is inserted.
13 is a schematic cross-sectional view of the water block assembly according to an embodiment of the present application into which a stress member provided with a water support member is inserted.
14 is a schematic cross-sectional view for explaining a first step of a method of constructing an underground continuous wall according to an embodiment of the present application.
15 is a schematic cross-sectional view for explaining a second step of a method of constructing an underground continuous wall according to an embodiment of the present application.
16 is a schematic cross-sectional view for explaining a third step of a method of constructing an underground continuous wall according to an embodiment of the present application.
17 is a schematic cross-sectional view for explaining a fourth step of a method of constructing an underground continuous wall according to an embodiment of the present application.
18 is a schematic cross-sectional view for explaining disposition of a trailing reinforcing bar network in a trailing excavation space in a fifth step of a method for constructing an underground continuous wall according to an embodiment of the present application.
19 is a schematic cross-sectional view for explaining pouring in a subsequent excavation space in a fifth step of a method for constructing an underground continuous wall according to an embodiment of the present application.
FIG. 20 is a schematic cross-sectional view for explaining a method of constructing an underground continuous wall according to an embodiment of the present application to which a trailing reinforcing bar network of FIG. 19 and a trailing reinforcing bar network of a different type are applied.

Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present application. However, the present application may be implemented in various different forms and is not limited to the embodiments described herein. In addition, in the drawings, parts irrelevant to the description are omitted in order to clearly describe the present application, and similar reference numerals are attached to similar parts throughout the specification.

Throughout this specification, when a part is said to be "connected" with another part, it is not only "directly connected", but also "indirectly connected" or "electrically connected" with another element interposed therebetween. "Including the case.

Throughout the present specification, when a member is positioned "on", "upper", "upper", "under", "lower", and "lower" of another member, this means that a member is located on another member. This includes not only the case where they are in contact, but also the case where another member exists between the two members.

In the entire specification of the present application, when a certain part "includes" a certain component, it means that other components may be further included, rather than excluding other components unless specifically stated to the contrary.

In addition, terms related to direction or position (upper, upper, upper, lower, lower, lower, front, front, rear, rear, etc.) in the description of the embodiments of the present application are based on the arrangement state of each component shown in the drawings. It is set to. For example, when looking at FIG. 1, the 12 o'clock direction is the upper side, the portion facing the 12 o'clock direction is the upper side, the end facing the 12 o'clock direction is the upper side, the 6 o'clock direction is the lower side, and the general A portion facing the 6 o'clock direction may be a lower portion, and an end portion facing the 6 o'clock direction may be a lower portion. In addition, when looking at FIG. 2, the overall 3 o'clock direction may be the front, the overall 3 o'clock direction may be the front, the overall 9 o'clock direction may be the rear, the overall 9 o'clock direction may be the rear, etc. . As another example, when looking at FIG. 3, the overall 12 o'clock direction is the front, the overall 12 o'clock direction is the front, the overall 6 o'clock direction is the rear, the overall 6 o'clock direction is the rear, etc. I can.

The present application relates to a water stop block assembly used in the construction of a water stop for forming a continuous underground wall, and a method of constructing a continuous underground wall using the same.

First, a description will be given of the water block assembly (hereinafter referred to as'this water block assembly') 1 according to an embodiment of the present application. The water-stop block assembly 1 may relate to an water-stop block assembly disposed such that the rear surface faces one wall of the excavation space 91. It will be described in detail below.

1 to 3, the water block assembly 1 includes a rear plate 11 extending in the vertical direction. Each of the outer portions in the width direction of the rear plate 11 may extend to protrude further in both outer portions in the width direction than the body portion 12 to be described later.

In addition, referring to Figures 1 to 3, the water block assembly (1) includes a body portion (12). The body portion 12 is formed to protrude forward from the rear plate 11. In addition, the size, shape, etc. of the body portion 12 may be variously designed according to necessity. For example, if necessary, the thickness of the body portion 12 may be thick or slim. In addition, referring to FIG. 3, the body portion 12 may be formed in a two-stage structure in the front-rear direction. Specifically, referring to Figure 3, the body portion 112 may be formed in a two-stage structure in the front-rear direction, and each of the rear end block portion and the front end block portion constituting the second stage has a maximum width and goes forward. To narrow the width, both outer surfaces in the width direction may be formed in the form of tapered inclined surfaces. Alternatively, although not shown in the drawings, as another embodiment, the body portion 12 may be formed in a single-stage structure in the front-rear direction. Even in this case, the body portion 112 may be formed in the form of tapered inclined surfaces on both outer surfaces in the width direction such that the rear end has a maximum width and the width becomes narrower toward the front.

In addition, the body portion 12 has a water-stop material insertion groove 121 in which the water-stop material is inserted in the front surface, and for inserting a stress material communicating with the front surface of the rear plate 11 in each of the front surfaces of both sides of the water-stop material insertion groove 121 Hole 122 is formed.

Referring to FIGS. 1 and 3 together, the water-stop material insertion groove 121 may be formed in a form in which a cross-sectional shape recessed rearwardly extends in the vertical direction. Referring to FIG. 3, the water-stop material 3 may be inserted into the water-stop material insertion groove 121 so that at least a part of the water-stop material 3 protrudes forward from the body portion 12.

In addition, referring to FIG. 3, the stress material insertion hole 122 is a joint stress material (hereinafter referred to as'stress material') disposed to cover the reinforcement discontinuity of the joint between adjacent underground continuous walls when the underground continuous wall is formed. It is formed in a size that allows insertion of (2). The stress material 2 may have a state in which the rear end 2a is inserted into the stress material insertion hole 122 so that the front end 2b protrudes forward than the body 12 and extends in the front-rear direction. For example, the diameter, cross-sectional area, etc. of the stress material insertion hole 122 may be set so that the stress material 2 can be inserted. For reference, the stress material 2 may be a reinforcing bar. For example, the stress material 2 may be a deformed reinforcement. The reinforcing bar discontinuity of the joint between the adjacent underground continuous walls of the stress member 2 will be described later.

In addition, referring to Figure 3, the water block assembly (1) is a processing unit (13) for temporarily fixing the stress material (2) in a state in which the rear end of the stress material (2) is inserted into the stress material insertion hole (122). ).

This water-stop block assembly (1) can be applied to a water stop construction under the formation of an underground continuous wall. In this case, referring to FIG. 4, the water-stop block assembly (1) is excavated in a state assembled with the stress member (2). Arranged in the space 91, and referring to FIG. 5, concrete is poured in the excavation space 91, and referring to FIG. 6, a trailing excavation space adjacent to one side of the excavation space 91 (neighboring excavation space) After 92 is excavated, referring to FIG. 7, the water-stop block assembly 1 may be separated from and removed from the stress material 2. Referring to FIG. 3, the temporary part 13 is the present water-stop block. After the assembly (1) is assembled with the stress material (2), the stress material (2) is the stress material until the separation from the stress material (2) is performed when the water block assembly (1) is removed from the excavation space (91). It may be temporarily fixed to maintain the inserted state in the insertion hole 122.

Accordingly, the temporary fixing part 3 has a temporary fixing force that is smaller than the fixing force by concrete in a state in which the front end 2b of the stress material 2 protruding forward than the stress material insertion hole 122 is embedded in the concrete. It is provided to have. As described above, the stress material 2 is inserted into the stress material insertion hole 122 in the excavation space, the present water-stop block assembly 1 is disposed in the excavation space 91, and concrete is poured into the excavation space 91 Is made, and the trailing excavation space 92 adjacent to one side of the excavation space 91 is excavated, and after that, the water block assembly 1 may be removed, which is a protruding part of the stress material 2 Since the front end (2b) is in a state embedded in the concrete, the front end (2b) dpsms can be applied to the fixing force (for example, adhesion) by the poured concrete. Accordingly, when the water block assembly 1 is removed, the water water block assembly 1 and the stress member 2 are separated, the stress member 2 is left, and the water water block assembly 1 can be removed, The temporary fixing portion 3 may have a temporary fixing force smaller than the fixing force by concrete acting on the front end portion 2b. In addition, the temporary unit 13 is performed when the water block assembly 1 is assembled with the stress member 2, and then the water block assembly 1 is removed from the excavation space 91 with the stress member 2 Until separation, the stress material 2 may have a temporary clamping force capable of maintaining a state inserted into the stress material insertion hole 122. In other words, the temporary unit 13 deviates from the expected impact degree of the water block assembly 1 or the stress member 2 seen from the stress member 2 and transport, lifting, etc. after the water block assembly 1 is assembled. You can have a temporary tack that is set so that it is not.

According to this, the temporary fixing force of the temporary fixing part 13 may be smaller than the fixing power by concrete acting on the front end part 2b, and the lower limit value is performed when the present water block assembly 1 is removed from the excavation space 91. The stress material 2 may be set to such an extent that it can maintain a state inserted into the stress material insertion hole 122 until the stress material 2 is separated from the stress material 2.

1 and 3, the stress material insertion hole 122 includes a first hole 122a formed on one side in the transverse direction around the water-stop material insertion hole 121 and a second hole 122a formed on the other side in the transverse direction. It may include a hole (122b). Each of the first hole 122a and the second hole 122b may be formed in plurality at intervals along the vertical direction. Accordingly, referring to FIG. 7, when the underground continuous wall is formed, the index material 3 is interposed between the panel formed in the excavation space 91 and the panel formed in the following excavation space 91, and indexes in the width direction. A stress member 2 extending in the front-rear direction from one side and the other side of the material 3 may be disposed at intervals along the vertical direction.

The stress material 2 may be made of a material that forms attractive force with respect to the magnet. As described above, the stress member 2 may be reinforced, and in this case, the stress member 2 may form an attractive force with respect to the magnet. In addition, referring to Figure 3, the temporary portion 13 is a magnet unit disposed on the front surface of the rear plate 11 communicating with the stress material insertion hole 122 to act on the rear end of the stress material 2 (131) may be included. That the magnet unit 131 is disposed on the front surface of the rear plate 11 means that the magnet unit 131 is provided to be in contact with the front surface of the rear plate 11, or spaced apart from the front surface of the rear plate 11 by a predetermined distance. It may mean including all that are arranged and arranged. Referring to FIG. 3, a plurality of magnet units 131 may be provided to correspond to each of the plurality of stress material insertion holes 122. For example, each of the plurality of magnet units 131 faces each of the plurality of stress material insertion holes 122 in the front-rear direction, that is, the stress material 2 inserted into each of the plurality of stress material insertion holes 122 ) Can be placed on the extension line. Accordingly, the magnet unit 131 may exert an attractive force on the rear end of the stress material 2 inserted into the stress material insertion hole 122.

The magnet unit 131 may be provided so that the attractive force due to the magnetism forms at least a part of the temporary clamping force described above. In other words, the attractive force of the magnet unit 131 and the stress member 2 may be included in the above-described temporary clamping force. For reference, the magnet unit 131 may be a permanent magnet.

In addition, the magnet unit 131 may position the stress material 2 inserted into the stress material insertion hole 122. For example, in the process of inserting the stress material 2 into the stress material insertion hole 122, the stress material 2 has its rear end (rear surface) connected to the magnet unit 131 by the attraction of the magnet unit 131. It can be guided so that it can be positioned oppositely.

In addition, referring to FIG. 3, the temporary portion 13 may include a tube member 132 having a hollow passage into which the stress member 2 can be inserted. The tube member 132 has its front end fixed with respect to the front surface of the body portion 12 so that the hollow passage forms the stress material insertion hole 122, and is attracted to the rear end of the stress material 2 inserted into the hollow passage. The above-described magnet unit 131 may be disposed at the rear end so as to act. For example, the front end portion of the tube member 132 may be fixed to the front surface of the body portion 12 by welding. In addition, the rear end of the tube member 132 may be located on the edge of the magnet unit 131. That is, the tube member 132 may be provided in a form extending forward from the edge portion of the magnet unit 131. Accordingly, the stress member 2 inserted into the hollow passage of the tube member 132 may have a rear end facing the magnet unit 131. The tube member 132 may be a closed shape in which a hollow portion (hollow passage) is formed in cross section, for example, it may be a circular tube.

In addition, referring to FIG. 3, the temporary part 13 is elastically disposed in a state in which at least a part of the gap between the inner circumference of the stress material insertion hole 122 and the outer circumference of the stress material 2 is elastically compressed. It may include a packing unit 133.

The elastic packing unit 133 may be provided so that the elastic recovery force applied by the elastic compression forms at least a part of the temporary clamping force. For example, by the elastic recovery force of the elastic packing unit 133, the elastic packing unit 133 may be in contact with the inner circumference of the stress material insertion hole 122 or the outer circumference of the stress material 2, and the elastic packing unit 133 ) And the frictional force between the inner circumference of the stress material insertion hole 122 and the elastic packing unit 133, the frictional force acting between the elastic packing unit 133 and the outer circumference of the stress material 2, etc. Can form part. Accordingly, a portion of the stress material 2 in contact with the elastic packing unit 133 may be fixed in the stress material insertion hole 122.

In addition, between the stress material 2 and the stress material insertion hole 122 may be shielded by the elastic packing unit 133. Accordingly, the concrete poured into the excavation space 91 can be prevented from flowing between the stress material 2 and the stress material insertion hole 122.

That is, the elastic packing unit 133 fixes the stress material 2 together with the magnet unit 131 and prevents the concrete from penetrating into the stress material insertion hole 122 when placing concrete. 1) (Water Stop Tube) can be continuously reused.

For example, the elastic packing unit 133 may be made of a material including rubber.

In addition, referring to FIGS. 8 and 9, in the elastic packing unit 133, a through hole into which the stress member 2 is inserted may be formed in a front-rear direction (length direction). Further, referring to FIG. 8, the elastic packing unit 133 may have a constant outer diameter.

Alternatively, referring to FIG. 9, the elastic packing unit 133 may have a wedge shape with an outer surface toward an inner side toward the rear side. In addition, the elastic packing unit 133 is provided so that the rear end is located between the outer surface of the stress material 2 and the inner surface of the stress material insertion hole 122, and the front end protrudes to the front of the stress material insertion hole 122. I can. In addition, the outer diameter of the elastic packing unit 133 may be larger than the inner diameter of the stress material insertion hole 122, and the outer diameter of the elastic packing unit 133 may decrease toward the rear end because it is a wedge shape.

In addition, when the stress member 2 has a wedge shape, the stress member 2 has an outer diameter equal to the inner diameter of the front end of the stress member insertion hole 122 of the elastic packing unit 133 provided therein. When located at the front end of the insertion hole 122, it may have a gap in the front-rear direction between the lower end and the magnet unit 131. In addition, the elastic packing unit 133 may have a length in the front-rear direction from the point having the same outer diameter as the inner diameter of the front end of the stress material insertion hole 122 to the front end thereof in the front-rear direction so that the shielding force is increased. have. Accordingly, when the stress member 2 moves backward by the attraction of the magnet unit 131 and the rear end is close to the magnet unit 131 (for example, when it comes into contact), the elastic packing unit ( 133) is also moved to the rear, and a portion having an outer diameter larger than the inner diameter of the front end of the stress material insertion hole 122 may be located at the front end of the stress material insertion hole 122, and thus, elasticity The compression amount of the packing unit 133 may be increased, and the shielding force and the temporary fixing force may be increased. In this way, when the stress member 2 has a wedge shape, the wedge effect and the magnetism are linked, so that the shielding force and the temporary fixing force may be increased.

Further, referring to FIG. 10, the elastic packing unit 133 may be formed of a plurality of members 1331. That is, the elastic packing unit 133 may be made of a single member, or, made of a plurality of members 1331, the plurality of members are elastically compressed and the inner circumference of the stress material insertion hole 122 and the stress material ( 2) The gap between the outer circumferences can be shielded.

In summary, the elastic packing unit 133 may be configured in a cylindrical shape (see FIG. 8) or a wedge shape with different upper and lower cross-sections (see FIG. 9), and may be configured as a separate type (see FIG. 10) in consideration of the convenience of operation. have. The shape (shape) of the elastic packing unit 133 can be any type as long as it can be connected to the stress material 2 and prevents concrete from penetrating into the stress material insertion hole 122. In addition, as the material of the elastic packing unit 133, it is possible to use a material suitable for field conditions, including soft plastic.

In addition, referring to FIG. 11, the pipe member 132 is obliquely positioned so that the rear end is located below the front end in consideration that the water block assembly 1 is rotated around the lower portion to be separated from the stress member 2 Can be placed.

Specifically, when the water block assembly 1 is separated from the stress material 2, the upper end of the water water block assembly 1 is attached to the stress material 2 with the lower end of the water water block assembly 1 as the center of rotation. The water block assembly (1) can be separated from the stress member (2) by being moved relatively backward. This water-stop block assembly (1) is that when the pipe member 132 is formed in parallel with the front-rear direction, deformation may occur in the stress member 2 during the rotational movement of the water-stop block assembly (1) as described above. In consideration, the watertight block assembly 1 may be disposed to extend obliquely in the front-rear direction so that the deformation of the stress member 2 is reduced during the rotational movement as described above, so that the rear end is positioned below the front end.

Accordingly, for example, when the depth of the installation section of the stress member 2 is small, the present water block assembly 1 in which the pipe member 132 is disposed in parallel in the front-rear direction may be used, and the stress member 2 ), when the depth of the installation section is deep, the pipe member 132 is arranged diagonally (as described above in an oblique front-rear direction) according to the drawing angle of the water-stop block assembly (1). Can be used. Accordingly, the deformation of the stress member 2 is minimized when the water block assembly 1 is drawn out, and the drawing may be facilitated.

In addition, the water block assembly 1 may include the stress material 2 described above. For example, the stress material 2 may be reinforced.

In addition, referring to Figure 12, the water-stop block assembly (1) of the front end of the stress material (2) and the water-stop material (3) in the state of being inserted into the water-stop material insertion groove (121) protruding forward. It may include a water-stop material support member 28 to connect. For example, the water-stop material support member 28 may be a reinforcing bar (for example, a deformed reinforcing bar). In addition, the water holding member support member 28 may have one end connected to the front end of the stress member 2 (eg, welding), and the other end connected to the water holding member 3. In this case, the stress member 2 may be manufactured in an M-shape.

The water holding member support member 28 may be provided to support the side surface of the water holding member 3 by being in contact with the side surface of the water holding member 3. By the water-stop material support member 28, the transverse tensile force applied to the water-stop material 3 when the water-stop block assembly 1 is separated can be reduced compared to when the water-stop material support member 28 is not equipped.

When removing the water-water block assembly 1 by tilting the water-water block assembly 1 viewed from the side of the continuous wall diagonally (rotating the lower part) as described above, the water-water block assembly 1 is removed. There may be a possibility that the water-stop material 3 may be damaged during separation due to a transverse tensile force acting on the material (waterproof plate) 3. In preparation for the occurrence of such a problem, when the water-stop material support member 28 is provided, the water-stop material 3 may be fixed to the stress material 2, and thus the water-stop material 3 when the water-stop block assembly 1 is separated. ), at least a part of the transverse tensile force acting on it may be removed to prevent breakage. That is, by the water-stop material support member 28, the transverse tensile force acting on the water-stop material 3 when the water-stop block assembly 1 is separated can be reduced compared to when the water-stop material support member 28 is not equipped, Breakage of the water-stop material 3 can be prevented.

In addition, referring to FIG. 13, the front end of the stress member 2 may be provided with an extension portion 29 having a cross-sectional area larger than that of the front end portion 2b. By the expansion part 29, the resistance to the pulling force acting on the stress member 2 when the water block assembly 1 is separated may be increased compared to the case where the expansion part 29 is not provided. The extension part 29 may have the same shape as the head of the bolt. For example, when the water block assembly 1 is separated, a pulling force from the concrete in which the stress member 2 is embedded may be applied to the stress member 2. However, by the expanded portion 29 having a cross-sectional area wider than the cross-sectional area of the stress member 2, the resistance to the pulling may be increased.

Hereinafter, a method for constructing an underground continuous wall using the water block assembly 1 according to an exemplary embodiment of the present application (hereinafter referred to as'this construction method') will be described. However, this construction method uses the above-described water-stop block assembly 1, and shares the same or corresponding technical features and configurations as the present water-stop block assembly. Accordingly, descriptions overlapping with those described in the water block assembly 1 will be simplified or omitted, and the same reference numerals will be used for the same or similar configurations.

Referring to Figure 14, the present construction method, the drilling space 91 is formed, and the water block assembly seen so that the rear surface (for example, the rear surface of the rear plate 11) faces one side wall of the excavation space 91 ( Including the step of placing 1) (the first step). In the first step, the water block assembly 1 may have a stress material 2 inserted into a hole 122 for inserting a stress material. Accordingly, the stress material 2 may be inserted in at least one of the plurality of stress material insertion holes 122 of the water-stop block assembly 1 seen in the first step, and this water-stop block assembly 1 May be disposed in the excavation space 91.

In addition, the present construction method includes the steps of manufacturing the water-stop block assembly 1 and inserting the stress material 2 into the hole 122 for inserting the stress material of the water-stop block assembly 1 before the first step. Can include. The step of manufacturing the water resistant block assembly 1 and inserting the stress material 2 into the stress material insertion hole 122 is to drill the aforementioned stress material insertion hole 122 in the water resistant block assembly 1 can do. In addition, the step of manufacturing the water-stop block assembly (1) and inserting the stress material (2) into the stress material insertion hole (122) is on the front surface of the rear plate (11) communicating with the stress material insertion hole (122). The magnet unit 131 may be disposed on and the tube member 132 may be disposed through the stress material insertion hole 122. Specifically, the tube member 132 provided with the magnet unit 131 at the rear end may be inserted into the stress material insertion hole 122 so that the magnet unit 131 is positioned on the front surface of the rear plate 11. In addition, it may be welded to a portion surrounding the upper end of the stress material insertion hole 122 of the water block assembly 1 viewed from the upper end of the tube member 132. That is, the step of manufacturing the water-stop block assembly (1) and inserting the stress material (2) into the stress material insertion hole (122) is a tube for inserting the stress material (2) into the stress material insertion hole (122). The member 132 can be inserted and fixed by welding. Since the magnet unit 131 is provided under the tube member 132, when the stress member 2 is inserted into the tube member 132, it is attached to the magnet to prevent separation.

In addition, the step of manufacturing the water block assembly 1 and inserting the stress material 2 into the stress material insertion hole 122 is to insert the stress material after inserting the elastic packing unit 133 into the stress material 2 It can be inserted into the dragon hole 122 (can be inserted). At this time, the stress material 2 may be pre-cut to fit the stress material insertion hole 122 of the water block assembly 1 previously manufactured in the field. In addition, the elastic packing unit 133 is provided in the stress material 2 so that the elastic packing unit 133 is positioned between the stress material 2 and the stress material insertion hole 122, and the stress material is a stress material insertion hole. Can be inserted into 122. For reference, in this process, the elastic packing unit 133 may be fitted to the cut stress material 2 by the depth of the stress material insertion hole 122 (that is, in consideration of the depth). At this time, the elastic packing unit 133 may be configured as a cylindrical (see FIG. 8) or a wedge-shaped (see FIG. 9) with different upper and lower cross-sections, and may be configured as a separate type (see FIG. 10) in consideration of the convenience of work. have. The shape (shape) of the elastic packing unit 133 can be any type as long as it can be connected to the stress material 2 and prevents concrete from penetrating into the stress material insertion hole 122. In addition, the material of the elastic packing unit 133 may be a material suitable for field conditions, including soft plastic.

In addition, referring to FIG. 15, the present construction method includes a step (second step) of arranging and pouring a reinforcing bar network 911 for panel formation in the excavation space 91. The second step is to pour concrete. In addition, the second step can cure the poured concrete.

In addition, referring to FIG. 16, the present construction method includes forming a trailing excavation space 92 on one side of the excavation space 91 (a third step).

In addition, referring to FIG. 17, the present construction method includes a step of separating and removing the water block assembly 1 from the stress member 2 (step 4).

In the fourth step, the water-stop block assembly 1 may be separated from the stress member 2 by rotating around the lower portion of the water-stop block assembly 1. In this case, the space between the water-stop block assembly 1 and the concrete that is cast and cured in the excavation space 91 increases as it faces upward, and the water-stop block assembly 1 may be separated from the stress material 2. In this case, the water-stop block assembly (1) is moved relative to the stress material (2) and can be separated from the stress material (2), but moves relatively backward with respect to the stress material of the water-stop block assembly (2). The amount of movement to be made may be larger as it faces upward. Accordingly, the more the stress member 2 is positioned on the upper side, the faster the water block assembly 2 may be separated.

In addition, referring to FIGS. 18 and 19, the present construction method includes the step of disposing and pouring a trailing reinforcing bar network 8 for forming a trailing panel in a trailing excavation space 92 (step 5).

Accordingly, since the panel formed in the excavation space 91 and the trailing panel formed in the following excavation space 92 can be connected by the stress member 2, the connection between the panels is improved, and the seismic performance of the underground continuous wall is further improved. Can be augmented.

In addition, the present construction method, between the fourth step and the fifth step, may include the step of disposing the water block assembly 1 so that the rear surface faces one wall surface of the trailing excavation space 92, and the fifth After the step, the third step, the fourth step, the step of disposing the water block assembly 1 and the fifth step with respect to one side of the trailing excavation space 92 may be repeated.

On the other hand, the water block assembly 91 removed from the excavation space 91 may be reused by mounting the stress member 2 in the same manner as described above.

In addition, referring to FIGS. 16 and 19 together, in the present application, the spacing between the first hole 122a and the second hole 122b in the width direction (12 o'clock-6 o'clock in FIG. 19) is the first hole ( A trailing reinforcing bar network (or reinforcing bar) between at least a part of the rear end 2a of the stress member 2 inserted into 122a) and at least a part of the rear end 2a of the stress member 2 inserted into the second hole 122b It can be set to a width into which the other end of the net (8)) (8) can be inserted. In this case, the other end or one end of the trailing reinforcement mesh (or reinforcement mesh 8) 8 is inserted into the first hole 122a, the rear end 2a and the second hole 122b of the stress member 2 An insertion part inserted between the stress material 2 inserted into the rear end 2a of the can be formed, and in the fifth step, the insertion part of the trailing reinforcing bar mesh 8 is in the rear end 2a of the first hole 122a. The trailing reinforcing bar network 8 may be disposed (inserted) so as to be disposed (inserted) between the inserted stress member 2 and the stress member 2 inserted into the rear end 2a of the second hole 122b.

Alternatively, as shown in FIGS. 16 and 20, the width direction (12 o'clock-6 o'clock direction of FIG. 19) between the first hole 122a and the second hole 122b is a stress material inserted into the first hole 122a ( At least a part of the rear end (2a) of 2) and the stress member inserted into the second hole (122b) (2) At least a part of the rear end (2a) of the trailing reinforcing bar net (or reinforcing bar net (8)) (8) It may be set to a width that can be inserted into the other end. In this case, the other end or one end of the trailing reinforcing bar network (or reinforcing bar network 8) 8 is a stress material 2 inserted into the first hole 122a and a stress material inserted into the second hole 122b ( 2) may be inserted into the insertion region forming portion, and the fifth step is the rear end portion 2a of the stress member 2 inserted into the first hole 122a into the insertion region forming portion of the trailing reinforcing bar network 8 ) And at least a portion of the rear end portion 2a of the stress member 2 inserted into the second hole 122b, and the trailing reinforcing bar network 8 may be disposed (inserted).

According to this, the connection between the panel formed in the excavation space 91 and the trailing panel formed in the following excavation space 92 is improved by the stress member 2 and the trailing reinforcing bar network 8, so that the seismic performance of the underground continuous wall is improved. It can be further augmented.

The foregoing description of the present application is for illustrative purposes only, and those of ordinary skill in the art to which the present application pertains will be able to understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present application. Therefore, it should be understood that the embodiments described above are illustrative in all respects and are not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present application is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present application.

1: water block assembly
11: back plate
12: body
121: groove for inserting the water-stop material
122: hole for inserting stress material
122a: first hole
122b: second hole
13: Gago Government
131: magnet unit
132: tube member
133: elastic packing unit
1331: Multiple absences
2: stress material
2a: rear end
2b: front end
28: water-stop material support member
29: extension
3: water resistant material
8: rebar mesh, trailing rebar mesh
91: excavation space
92: trailing excavation space

Claims (8)

In the water stop block assembly disposed so that the rear surface faces one side wall of the excavation space during the water stop construction for the formation of the underground continuous wall,
A rear plate extending in the vertical direction; And
Doedoe formed to protrude forward from the rear plate, a water-stop material insertion groove is formed in the front surface, and a stress material insertion hole communicating with the front surface of the rear plate is formed in each of the front surfaces of both sides of the water-stop material insertion groove. Including the body,
The stress material insertion hole is formed in a size capable of inserting a joint stress material disposed to cover the reinforcement discontinuity of the joint between adjacent underground continuous walls when the underground continuous wall is formed,
The water-stop block assembly further includes a temporary portion for temporarily fixing the stress material in a state in which the rear end of the stress material is inserted into the stress material insertion hole,
The temporary fixing portion is provided to have a temporary fixing force smaller than the fixing force by concrete in a state where the front end portion of the stress material protruding forward than the stress material insertion hole is embedded in the concrete,
The stress material is provided with a material that forms attractive force with respect to the magnet,
The temporary portion includes a magnet unit disposed on the front surface of the rear plate communicating with the stress material insertion hole so as to act on an attractive force with respect to the rear end of the stress material,
The magnetic unit is, the water block assembly is provided to form at least a portion of the temporary clamping force by the magnetic attraction. The method of claim 1,
The water-stop material insertion groove is formed in a shape in which a cross-sectional shape recessed rearward extends in the vertical direction,
The stress material insertion hole includes a first hole formed on one side in the transverse direction around the water-stop material insertion groove and a second hole formed on the other side in the transverse direction,
Each of the first hole and the second hole is formed with a plurality of intervals along the vertical direction, the index block assembly. delete The method of claim 1,
The temporary portion includes a tube member having a hollow passage of a size into which the stress member can be inserted,
The tubular member, the front end portion is fixed to the front of the body portion so that the hollow passage forms the hole for inserting the stress material, and the rear end portion of the tube member so that attractive force is applied to the rear end of the stress material inserted into the hollow passage. That the magnet unit is disposed, the index block assembly. The method of claim 4,
The pipe member, considering that the water block assembly is separated from the stress member by rotating about a lower portion, the water block assembly is disposed at an angle such that the rear end is positioned below the front end. The method of claim 1,
The temporary portion includes an elastic packing unit disposed in a state in which at least a portion is elastically compressed in a gap region between the inner circumference of the stress material insertion hole and the outer circumference of the stress material,
The elastic packing unit, the elastic recovery force applied by the elastic compression is provided to form at least a portion of the temporary clamping force, the index block assembly. The method of claim 1,
Stress material; And
Further comprising a water-stop material support member for connecting the front end portion of the stress material and a portion of the water-stop material that protrudes forward while being inserted into the water-stop material insertion groove
The water holding member support member is provided to support the side surface of the water holding member by contacting the side surface of the water holding member,
By the water-stop material support member, when the water-stop block assembly is separated, the lateral tensile force applied to the water-stop material is reduced compared to when the water-stop material support member is not equipped. As a method for constructing an underground continuous wall using the water block assembly according to claim 1,
(a) forming the excavation space and disposing the water-stop block assembly in which the stress material is inserted into the stress material insertion hole so that the rear surface of the rear plate faces one wall of the excavation space;
(b) placing and pouring a reinforcing bar network for panel formation in the excavation space;
(c) forming the trailing excavation space on one side of the excavation space; And
(d) separating and removing the water block assembly from the stress material;
(e) comprising the step of placing and pouring a reinforcing bar network for forming a trailing panel in the trailing excavation space.

Images