KR20230086640A - Continuous wall joint reinforcement construction method - Google Patents

Abstract

Disclosed is an underground continuous wall connection unit reinforcement construction method. The underground continuous wall connection unit reinforcement construction method comprises: (a) a step of forming a prior excavation space by using an excavator, and arranging a waterproof block assembly so that a rear surface of the waterproof block assembly can face a wall surface on one side of the prior excavation space, in which the waterproof block assembly includes interval materials installed on a rear surface of the water stop block to be apart from each other at a preset interval from a rear surface on one side of the prior excavation space; (b) a step of arranging a rebar network in the prior excavation space, and placing concrete, and forming a prior panel; (c) a step of forming a following excavation space on one side of the prior excavation space by using an excavator; (d) a step of separating and removing the waterproof block assembly from the waterproof materials and the stress materials; and (e) a step of arranging a rebar network in the following excavation space, and placing concrete, and forming a following panel. Therefore, waterproofing effects can be secured.

Description

Underground continuous wall joint reinforcement construction method {CONTINUOUS WALL JOINT REINFORCEMENT CONSTRUCTION METHOD}

The present application relates to a continuous wall joint reinforcement (C.J.R.) construction method capable of securing the continuity of a stress material that meets seismic design standards.

In general, a construction method for forming a diaphragm wall (continuous underground wall) connects separate panels to form a single structure due to the nature of the method.

In this regard, a conventional construction method for reinforcing the joint of a continuous wall using overcutting has been disclosed. However, these existing construction methods had problems in seismic analysis as the joint was a continuous wall-free section. In other words, according to the existing construction method, rootless sections occurred between panels, which made it somewhat vulnerable in terms of earthquake-resistant design. In particular, as the earthquake-resistant design standard for buildings was recently revised (2019), underground structures connected to the ground floor of buildings were also designated as earthquake-resistant design targets, and therefore, earthquake-resistant design is also required for diaphragm wall construction.

Accordingly, in the section where the continuity of the stress material is required so that the construction can be performed simply while satisfying the earthquake-resistant design standards, and the economic feasibility can be secured at least a certain level, the applicant of the present application uses the water stop construction for the formation of a continuous underground wall. It is necessary to newly implement a construction method that can be reinforced using overcutting in other sections while applying an index block assembly and an underground continuous wall construction method using the same (Korean Patent Registration No. 10-2242163).

The present invention is intended to solve the problems of the prior art described above, and in the section where continuity of the stress material is required, a stress material is installed while implementing a wedge shape at the joint so that the joint can be reinforced and the water resistance can be improved. It is an object of the present invention to provide a method of constructing reinforcement for a continuous underground wall joint in which reinforcement by overcutting can be performed.

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

As a technical means for achieving the above technical problem, the underground continuous wall joint reinforcement construction method according to the first aspect of the present application, (a) using excavation equipment to form a preceding excavation space, and one side of the preceding excavation space Arrange the block assembly on the wall so that the rear surface of the block assembly faces, but the block assembly is installed with respect to the rear surface of the block so that the rear surface of the block is spaced apart from the rear surface of one side of the preceding excavation space at a predetermined distance. including ash; (b) forming a preceding panel by arranging a reinforcing bar network in the preceding excavation space and pouring concrete; (c) forming the subsequent excavation space on one side of the preceding excavation space using excavation equipment; (d) separating and removing the block assembly from the stress member; and (e) arranging reinforcing bar nets in the subsequent excavation space and pouring concrete to form the latter panel, wherein the preceding excavation space is a first depth section requiring continuity of the stress material for the continuous underground wall joint. And a second depth section, which is the remaining depth section, in step (a), the block assembly is disposed corresponding to the first depth section, and in step (c), the excavation equipment forms the trailing excavation space. During excavation, parallel excavation is performed for at least some neighboring plane regions adjacent to the following excavation space among the spacing plane regions corresponding to the preset interval when viewed on a plane, and the spacer is used in step (c). At least some of them may be removed by excavation using drilling equipment, or may be removed in advance between steps (b) and (c).

The above-described problem solving means are merely exemplary and should not be construed as intended to limit the present disclosure. In addition to the exemplary embodiments described above, 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, after the formation of the preceding excavation space, the block assembly into which the stress material is inserted is placed in the first depth section requiring continuity of the stress material for the continuous underground wall joint, and the subsequent excavation space after the preceding panel is formed. Is formed, but at least a part of the spacer is removed when forming the trailing excavation space or the spacer is removed before forming the trailing excavation space, and the excavation equipment carries out parallel excavation for at least part of the neighboring plane area adjacent to the trailing excavation space among the spacing plane areas. can be performed, after which the block can be removed and the trailing panel can be formed. Accordingly, for the first depth section, the trailing panel can be formed not only in the trailing excavation space but also in the area where the block is removed, so that the trailing panel can be provided in a wedge shape with respect to the preceding panel at the continuous underground wall joint, In the first depth section, the seismic performance can be reinforced and the water order effect can be secured by the remaining stress member, and in the second depth section, a non-smooth surface is formed between the preceding panel and the following panel due to overcutting, resulting in improved water resistance. can be secured

1 is a schematic plan view for explaining the steps of forming a preliminary excavation space and arranging an index block assembly of a continuous underground wall joint reinforcement construction method according to an embodiment of the present application.
Figure 2 is a schematic vertical cross-sectional view for explaining a first depth section and a second depth section of the underground continuous wall joint reinforcement construction method according to an embodiment of the present application.
Figure 3 (a) is a schematic plan view for explaining the step of forming the preceding panel of the underground continuous wall joint reinforcement construction method according to an embodiment of the present application, Figure 3 (b) is an embodiment of the present application It is a schematic plan view for explaining the step of forming the post-excavation space of the underground continuous wall joint reinforcement construction method according to.
Figure 4 is an enlarged view of A in Figure 2;
Figure 5 is a schematic plan view for explaining the step of removing the index block assembly of the underground continuous wall joint reinforcement construction method and the step of forming the trailing panel according to an embodiment of the present application.
Figure 6 is a schematic horizontal cross-sectional view of an index block assembly according to an embodiment of the present application.
Figure 7 is a schematic front view of an index block assembly according to an embodiment of the present application in which the illustration of the temporary part, the stress member, the index member, etc. is omitted.
8 is a schematic side view of an index block assembly according to an embodiment of the present application in which a stress member, an index member, etc. are omitted.
9 is an enlarged view of A of FIG. 7 .
10 is a schematic horizontal cross-sectional view of an index block assembly according to an embodiment of the present application including a spacer in the form of a steel box portion provided on the upper side of the steel box portion with a clasp portion.
11 is a schematic horizontal cross-sectional view of an index block assembly according to an embodiment of the present application including spacers in the form of a steel box portion provided on both sides of the steel box portion in the width direction of the clasp portion.
Figure 12 is a schematic horizontal cross-sectional view of an index block assembly according to an embodiment of the present application equipped with a member for preventing separation.
13 is a schematic horizontal cross-sectional view of an index block assembly according to an embodiment of the present application provided with a protection unit.
Figure 14 is a schematic side view of the index block assembly according to one embodiment of the present application provided with a protection unit.

Hereinafter, embodiments of the present application will be described in detail so that those skilled in the art can easily practice with reference to the accompanying drawings. However, the present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. And in order to clearly describe the present application in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout this specification, when a part is said to be "connected" to another part, this includes not only the case of being "directly connected" but also the case of being "electrically connected" with another element in between. do.

Throughout the present specification, when a member is referred to as being “on,” “above,” “on top of,” “below,” “below,” or “below” another member, this means that a member is located in relation to another member. This includes not only the case of contact but also the case of another member between the two members.

Throughout the present specification, when a part "includes" a certain component, it means that it may further include other components without excluding other components unless otherwise stated.

In addition, terms related to direction or position (top, top, top, bottom, bottom, bottom, front, front, rear, back, etc.) in the description of the embodiments of the present application are based on the arrangement state of each component shown in the drawings. is set to For example, when looking at FIG. 2, the 12 o'clock direction is generally the upper side, the generally 12 o'clock direction is the upper part, the generally 12 o'clock direction is the upper end, and the 6 o'clock direction is generally the lower side. The part facing the 6 o'clock direction may be the lower part, and the end part generally facing the 6 o'clock direction may be the lower part. In addition, when looking at FIG. 6, the generally 12 o'clock direction is the front, the generally 12 o'clock direction is the front, the 6 o'clock direction is generally the rear, and the generally 6 o'clock direction is the rear. .

The present application relates to a reinforcing construction method for a continuous underground wall joint and an index block assembly used therein.

First, a method for constructing reinforcement for a continuous underground wall joint according to an embodiment of the present application (hereinafter referred to as 'this construction method') will be described.

Referring to FIG. 1, this construction method is a continuous underground wall joint reinforcement construction using a water stop block assembly (1) including a water stop block (11) in which a water stop material (3) and a stress material (2) are inserted and installed on the front side. way. The index block assembly 1 will be described later.

However, in the index block assembly 1, the index material 3 may be selectively applied. Illustratively, the index block assembly 1 may be manufactured in a form without the index member 3 in some cases, and in this case, it may be used for installing only the stress member 2.

1, this construction method forms a preceding excavation space 91 using excavation equipment, and the index block assembly so that the rear surface of the index block assembly 1 faces one side wall of the preceding excavation space 91 1) to place (first step). The index block assembly 1 is a spacer 12 installed with respect to the rear surface of the water stop block so that the rear surface of the water stop block 11 is spaced apart from the rear surface of one side of the preceding excavation space 91 at a predetermined distance t includes For example, the drilling rig may be a BC cutter. In addition, when forming the preceding excavation space 91, the excavation equipment may form the preceding excavation space 91 by performing excavation with multiple bites by excavating in an overlapping manner. For example, the length of the preceding excavation space 91 may be 6-7 m, and the width of the excavation equipment (the width in the direction corresponding to the longitudinal direction of the preceding excavation space 91, see FIG. 2, a) is about 2.8 m. can be In this case, it is possible to form the preceding excavation space 91 by performing excavation with multiple bites by overlapping excavation on a plane in the horizontal direction.

In addition, the spacer 12 is installed on the rear surface of the water stop block 11 to prevent the concrete from penetrating the rear side of the water stop block 11 during concrete pouring for forming the preceding panel 9a. And, it can be installed to form a joint by overcutting the continuous wall of the seismic rebar installation section (the section after the first depth section (d1) to be described later (the second depth section (d2) to be described later) in the same way as the existing method) there is.

Specifically, referring to FIG. 2, the preceding excavation space 91 includes a first depth section d1 requiring continuity of the stress material for the continuous underground wall joint and a second depth section d2 that is the remaining depth section. do. Referring to FIG. 2, in the first step, the index block assembly 1 is disposed corresponding to the first depth section.

In other words, in the first step, after the formation of the preceding excavation space 91, the index block assembly 1 is placed on one side wall of the preceding excavation space 91 with respect to the first depth section d1 of the preceding excavation space 91. The water stop block assembly 1 in which the water stop material 3 and the stress material 2 are inserted may be disposed so that the back faces face each other. At this time, although not shown in the drawing, the top of the index block assembly 1 may be provided with supports supported by guide walls on both sides in the width direction (12 o'clock to 6 o'clock direction in FIG. 1) of the preceding excavation space 91. . Accordingly, the index block assembly 1 may be inserted into the preceding excavation space 91 in a form supported on the upper surface of the guide wall and disposed with respect to the first depth section (d1).

In addition, referring to FIG. 3 , the construction method includes a step (second step) of forming the preceding panel 9a by arranging a reinforcing bar network in the preceding excavation space 91 and pouring concrete.

In addition, referring to FIGS. 2 and 3 , the construction method includes a step (third step) of forming a trailing excavation space 92 on one side of the preceding excavation space 91 using excavation equipment. At this time, the third step may be performed after the concrete cast in the second step has cured more than a predetermined amount. Since this is obvious to those skilled in the art, a detailed description thereof will be omitted.

Referring to FIGS. 3 and 4, in the third step, when excavating for forming a following excavation space, the excavation equipment is a trailing excavation space ( 92), and parallel excavation is performed on at least some adjacent planar regions.

For example, comparing (a) and (b) of FIG. 3 , the spacer 12 is at least partially removed by excavation of the drilling equipment in the third step, or in advance between the second and third steps. Removed.

Accordingly, in the third step, the drilling equipment may perform excavation for at least a part of the spacing plane region t as well as excavation for the following excavation space 92 by crushing the spacer 12 . Alternatively, when the spacer 12 is removed in advance between the second step and the third step, the drilling equipment is inserted and disposed over at least a part of the spacing plane area t from the following excavation space 92 to the subsequent excavation space ( 92) can be formed.

Accordingly, referring to FIG. 4 , when the third step is performed, the drilling equipment excavates at least a part of the interval plane region t of the second depth section d2 of the preceding drilling space 91 and the following drilling space 92 , and at least a part of the gap plane area t corresponding to the preset distance t of the second depth section d2 of the preceding panel 9a may be overcut.

In addition, referring to FIG. 5, this construction method includes a step (fourth step) of separating the water stop block assembly 1 from the water stop material 3 and the stress material 2. In addition, the fourth step may remove the index block assembly (1). Accordingly, the water stop material 3 and the stress material 2 may remain in the first depth section d1.

Also, referring to FIG. 5 , the construction method includes a step (fifth step) of forming a trailing panel 9b by arranging a reinforcing bar network in the trailing excavation space 92 and pouring concrete. When the fifth step is performed, concrete may be poured into the area where the index block assembly 1 (or the water stop block 11) of the preceding excavation space 91 is disposed. Accordingly, the following panel 9b is placed at the other end may be inserted into the preceding panel 9a in a wedge shape, thereby increasing the shear resistance of the joint to the lateral force and improving the seismic performance.

According to the foregoing, referring to FIG. 4 , some of the concrete corresponding to the neighboring planar region among the concrete poured for the second depth section d2 in the second step may be overcut by parallel excavation in the third step. there is. Accordingly, at least a part of the spacing plane area t corresponding to the preset spacing t of the second depth section of the preceding panel 9a is a rough surface that is not smooth by overcutting (for example, while being cut by a cutter) a cutting surface including a plurality of relatively protruding protrusions or a plurality of relatively recessed portions), and the order between the following panel 9b and the preceding panel 9a with respect to the second depth section d2 The effect can be greatly increased compared to a smooth cutting surface.

For reference, the spacer 12 may have a thickness of 10 cm or more.

In addition, the remaining arrangement of the water stop material 3 and the stress material 2 can provide water resistance and continuity of the stress material for the underground continuous wall joint.

That is, according to this construction method, for the first depth section (d1), the preceding panel (9a) and the following panel (9b) for the underground continuous wall joint are formed by the remaining arrangement of the water stop member (3) and the stress member (2). ), and for the second depth section d2, the water order between the preceding panel 9a and the following panel 9b by overcutting the preceding panel 9a. this can be secured.

For reference, the first depth section d1 is a section requiring continuity of the stress material, and may be, for example, an upper section of 8 m or more and 10 m or less. In addition, the length of the leading panel 9a may be 6m or more and 7m or less, and the trailing panel 9b may be 2.8m or more, where 2.6m may be the length of the trailing excavation space 92, and 0.2m or more may be a neighbor. It may include at least a portion of the flat area, and may be a length secured by the water stop block 11 and the spacer 12.

In addition, referring to FIG. 2, the length of the trailing excavation space 92 (see FIG. 2, length in the 3 o'clock - 9 o'clock direction) is such that the excavation width a of the excavation equipment used in the third step extends to the neighboring plane area. It can be set smaller than the excavation width (a) of the excavation equipment so as to be covered. Accordingly, in the third step, when the drilling equipment performs 1-bit excavation, not only the following excavation space 92 but also at least a part of the adjacent planar area t can be excavated. Accordingly, overcutting of at least a part of the neighboring planar area t of the preceding panel 9a in the second depth section d2 can be easily performed by 1-bit excavation of the excavation equipment. Here, the excavation rig may be the same excavation rig used to form the preceding excavation space 91 .

For reference, referring to FIG. 2, the excavation width (a) of the excavation equipment may mean the length in the longitudinal direction from the standpoint of the continuous underground wall.

For example, the spacer 12 may be made of a material capable of gutting or crushing by excavation equipment and floating. In this case, in the third step, excavation may be performed while crushing the spacer 12 to perform excavation for at least a part of the following excavation space 91 and the neighboring planar area t. In addition, the spacer 12 to be crushed may float on the stabilizer liquid in the post-excavation space 91, and accordingly, the spacer 12 may be easily removed.

Alternatively, the spacer 12 may be made of a material that is difficult to crush, such as a steel box. In this case, as described above, the third step may be performed after the spacer 12 is removed. In addition, if necessary, a type of excavation equipment different from the excavation equipment used when forming the preceding excavation space 91 for the part to be formed of the subsequent excavation space 91 for the removal of the spacer 12, which is a steel box, such as a grab A predetermined excavation may be performed by, and then, after the steel box is removed, the third step may be performed by the same excavation equipment as the excavation equipment used when forming the preceding excavation space 91.

In addition, in this construction method, when the index block assembly 1 is installed, if the excavation space is narrow due to post-construction review and poor verticality, the grab can be applied to excavate the earthworks.

In addition, if necessary, an auxiliary member covering the wing portion may be provided on the front surface of the wing portion protruding outward on both sides in the width direction of the body portion 112 of the rear plate 111 of the water stop block 11, The auxiliary member may be made of the same material as the spacer 12 .

In addition, in this construction method, the preceding panel 9a formed through the first step and the second step may be repeatedly formed at intervals in at least one direction of one side of the wall and the other side of the wall. In this case, the first step and the second step may be simultaneously performed on at least two of the portions where the preceding panels 9a are to be formed so that at least two of the plurality of preceding panels 9a are formed at the same time. Preferably, when the trailing excavation space 92 is formed, overcutting of one trailing excavation space 92 can be performed with respect to the preceding panel 9a located on one side and the other side of the longitudinal direction of the trailing excavation space 9b, respectively. It is preferable that the first step and the second step are performed at the same time with respect to the point where the preceding panel 9a is to be formed located on one side and the other side, respectively.

In addition, in this construction method, the trailing panel 9b formed through the third to fifth steps may be repeatedly formed at intervals in at least one direction of one side of the wall and the other side of the wall. In this case, the third to fifth steps may be simultaneously performed on at least two of the portions where the following panels 9b are to be formed so that at least two of the plurality of following panels 9b are formed at the same time.

Hereinafter, an index block assembly (hereinafter referred to as 'this index block assembly') 1 according to an embodiment of the present application is provided. The present index block assembly 1 is used in the present construction method described above, and shares the same or corresponding technical characteristics and configurations as the present construction method. Therefore, descriptions overlapping with those described in this construction method will be simplified or omitted, and the same reference numerals will be used for the same or similar configurations.

6 to 8, the water stop block assembly 1 includes a water stop block 11. The water stop block 11 protrudes forward from the back plate 111 extending vertically and the back plate 111, and has a groove 1121 for inserting the water stop material 3 into which the water stop material 3 is inserted is formed on the front surface, It includes a body portion 112 in which grooves 1122 for inserting stress materials communicating with the front surface of the rear plate 111 are formed on the front surfaces of both sides of the grooves 1121 for inserting water stop materials. Each of both outer sides of the rear plate 111 in the width direction may protrude further to both outer sides than each of both outer sides of the body portion 112 in the width direction.

The size and shape of the body 112 may be designed in various ways as needed. For example, if necessary, the thickness of the body portion 112 may be thick or slim. Also, referring to FIG. 6 , the body portion 112 may be formed in a two-stage structure in the front and rear directions. Specifically, referring to FIG. 6, the body portion 112 may be formed in a two-stage structure in the front-back direction. Each of the two-stage rear block and front block has a rear end having a maximum width as it moves toward the front. 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 112 may be formed in a single-stage structure in the front-back direction. Even in this case, the body portion 112 may be formed in the form of a tapered inclined surface such that both outer surfaces in the width direction have a maximum width at the rear end and become narrower toward the front.

In addition, referring to FIG. 7 , the groove 1121 for inserting the water stopper may be formed in a shape in which a cross-sectional shape recessed backward extends in the vertical direction. Referring to FIG. 6 , the water stop material 3 may be inserted into the groove 1121 for inserting the water stop material so that at least a portion protrudes forward from the body portion 112 .

In addition, the stress member 2 may be disposed to cover the discontinuity of reinforcing bars at the joint between adjacent continuous underground walls when forming the continuous underground wall. The stress member 2 may have a state in which the front end protrudes forward from the body 112 and the rear end is inserted into the stress member insertion groove 1122 and extended in the front-rear direction. For reference, the stress material 2 may be a reinforcing bar. For example, the stress member 2 may be a deformed reinforcing bar.

In addition, referring to FIGS. 6 to 8 , the index block assembly 1 includes a spacer 12 installed against the rear surface of the rear plate 111 . The spacer 12 is spaced between one side wall and the rear surface of the water stop block 11 in the first depth section d1 of the preceding excavation space 91 to enable parallel excavation in the above-described third step ( t) is secured. Accordingly, during the third step, the excavation equipment does not interfere with the water stop block 11 and can perform excavation for at least a part of the subsequent excavation space 91 and the neighboring flat area t.

Referring to FIG. 7 , a plurality of grooves 1122 for inserting a stress member may be formed at intervals on one side and the other side in the transverse direction around the groove 1121 for inserting a water stop member.

Also, referring to FIGS. 7 and 9 , the groove 1122 for inserting the stress member may have a rectangular cross section extending vertically so that the plurality of stress members 2 are inserted at intervals therebetween. The groove 1122 for inserting the stress material may have a rectangular bar shape. Accordingly, a plurality of stress members 2 may be inserted into one stress member insertion groove 1122 .

In addition, referring to FIGS. 6, 8 and 9, the water stop block 11 is disposed in the groove 1122 for inserting the stress material and inserts a plurality of stress materials inserted into the groove 1122 for inserting the stress material. It may include a temporary fixing part 113 to the groove 1122 for insertion.

The water stop block 11 is placed in the preceding excavation space 91 in an assembled state with the stress member 2, concrete is poured in the preceding excavation space 91, and the trailing to one side of the preceding excavation space 91 After the excavation space 92 is formed, it can be separated from and removed from the stress material 2. The stress material 2 may be temporarily fixed so that it can be maintained inserted into the stress material insertion groove 1122 until separation from the stress material 2 is performed when it is removed from the preceding excavation space 91.

Accordingly, the temporary fixing part 113 is provided so that the front end of the stress material 2 protrudes forward from the stress material insertion groove 1122 has a temporary fixing force smaller than the fixing force by the concrete in the state where the stress material 2 is embedded in the concrete. . As described above, the index block assembly 1 in which the stress material 2 is inserted into the groove 1122 for inserting the stress material in the excavation space is disposed in the excavation space 91, and concrete is poured into the excavation space 91. This is done, the following excavation space 92 adjacent to one side of the excavation space 91 is excavated, and then the water stop block 11 can be removed, the shear which is the protruding part of the stress material 2 Since the part is embedded in the concrete, the front end (the part protruding forward from the stress material insertion groove 1122 of the stress member 2) is subject to a fixing force (eg, adhesion) by the poured concrete. . Accordingly, when the water stop block 11 is removed, the water stop block 11 and the stress member 2 are separated, the stress member 2 remains, and the water stop block 11 can be removed, the temporary part ( 113) may have a temporary fixing force smaller than the fixing force by the concrete acting on the shear part. In addition, the temporary part 113 is separated from the stress material 2, which is performed when the water stop block 11 is removed from the excavation space 91 after the water stop block 11 is assembled with the stress material 2. The stress member 2 may have a temporary fixing force capable of maintaining a state of being inserted into the groove 1122 for inserting the stress member until. That is, after being assembled with the water stop block 11, the temporary part 113 does not deviate from the expected degree of impact to the index block assembly 1 or the stress material 2 viewed from the stress material 2 and transport, lifting, etc. It may have a temporary fixation force set so as not to.

According to this, the temporary fixing force of the temporary part 113 may be smaller than the fixing force by the concrete applied to the front end of the stress material 2, and the lower limit is when the water stop block 11 is removed from the excavation space 91. It may be set to such an extent that the stress material 2 can be maintained inserted into the stress material insertion groove 1122 until separation from the stress material 2 is performed.

Specifically, referring to FIG. 9 , the goggle part 113 is made of a material having elasticity, is elastically compressed and disposed in the groove 1122 for inserting the stress material, and is inserted into the groove 1122 for inserting the stress material. It may be a block portion in which an insertion hole 1133 into which each rear end of the stress member 2 is inserted is formed. The penetration hole 1133 may be formed to a size capable of inserting the stress member 2 . For example, the diameter and cross-sectional area of the insertion hole 1133 may be set so that the stress member 2 can be inserted. Preferably, the diameter of the penetration hole 1133 may be smaller than the diameter of the stress member 2 . Accordingly, when the stress material 2 is inserted into the insertion hole 1133, the diameter of the insertion hole 1133 having elasticity increases, and the temporary portion 113 is elastically compressed and disposed in the stress material insertion groove 1122. can For reference, the temporary part 113 may be made of a material including rubber, silicon, and the like.

More specifically, the go-go part 113 is a coupling member for detachably coupling the two block units 1131 and 1132 and the two block units 1131 and 1132 centered on the basis of the insertion hole 1133 (shown) omission) may be included. For example, one block unit 1131 is placed on the floor, and the rear end of the stress member 2 is located in half of the penetration hole 1133 formed in the one block unit 1131, the stress member 2 ) is placed, and the remaining block unit 1132 is covered thereon and coupled with a coupling member, and the temporary portion 113 is inserted into the groove 1122 for inserting the stress material while applying an external force (can be inserted by hitting with a hammer) can By coupling by the coupling member, the two block units 1131 and 1132 may be coupled to the stress member 2 so as to be compressed.

For reference, the coupling member is a bolt passing through the two block units 1131 and 1132 so as not to interfere with the stress member 2 and a nut fixing the bolt to at least one of the two block units 1131 and 1132 can include In addition, various types of coupling members may be applied.

In addition, when the water stop block 1 is removed, the temporary part 113 may be left in the ground without being removed.

In addition, referring to FIG. 6 , the body portion 112 protrudes from one inner surface and the other inner surface of the stress material insertion groove 1122 at the lower side of the goggle part 113 and is inserted into the stress material insertion groove 1122. Steps 1123 protruding to the other side and one side with the plurality of stress members interposed therebetween and supporting at least a part of the rear end of the plurality of stress members inserted into the stress member insertion groove 1122 in one and the other direction. can Since the rear end portion of the stress material 2 located between the pair of steps 1123 is supported in one and the other direction by the pair of steps 1123, the movement of the stress member 2 can be minimized, , the flow of the stress material 2 can be reduced. Considering this point, it is preferable that the distance between the pair of steps 1123 is set to a minimum within a range allowing insertion of the stress member 2. For example, the distance between the pair of steps 1123 may be set to a value corresponding to the thickness of the stress material 2 in consideration of the error range.

Referring to FIG. 6 , the step 1123 may support the temporary part 113 . That is, the temporary part 113 may be placed on a pair of steps 1123.

In addition, referring to FIGS. 6 and 8 , the water stop block 11 may include an insertion groove forming unit unit 114 forming a circumference of the stress material insertion groove 1122 . In addition, the above-described step 1123 may be formed in the groove forming unit unit 114 for insertion. In addition, the insertion groove forming unit unit 114 has a rear end coupled to the back plate 111 and may be provided with respect to the water stop block 11. That is, according to the present application, the body portion 112 may be prepared by opening the place where the groove forming unit unit 114 for insertion is to be provided, and the groove 1122 for inserting the stress material of the back plate 111 is The groove forming unit unit 114 for insertion is provided in the portion to be formed, and then the water stop block 11 can be prepared through the body portion 112 being provided with respect to the back plate 111. At this time, the rear plate 111, the body portion 112, and the insertion groove forming unit unit 114 may be made of the same material, for example, a material containing metal, and may be mutually coupled by various means such as welding. there is.

In this way, since the groove 1122 for inserting the stress material can be formed by the groove forming unit unit 114 for insertion in the form of a unit unit for each block, individual replacement is possible when damage occurs during use.

By the groove forming unit 114 for stress material insertion, the stress material insertion groove 1122 may have a square cross section, and is manufactured in the form of a square bar, so that the reinforcing bar (stress material (2) )) can be easily provided to adjust the installation interval.

In addition, the spacer 12 may be made of a material that can be cut by excavation equipment and can float. In other words, the spacer can be easily removed by the wheel cutter, and can be made of a material that floats after excavation and is easy to recover or process because it has floating performance. In this case, the spacer 12 may be provided with respect to the water stop block 11 by taping with a tape, fixing with a reinforcing bar network, or the like. When the spacer 12 is taped, when the spacer 12 is crushed, the tape floats together with the spacer 12 and can be recovered. In addition, when the spacer 12 is fixed to the water stop block 11 by a reinforcing bar network, the reinforcing bar network may be a mesh reinforcing bar network. When excavating by an excavation equipment, the spacer 12 is cut by the excavation equipment. The rebar net is caught on the teeth of the excavation equipment and moved upward and can be removed. Alternatively, depending on circumstances, the reinforcing bar network may remain underground.

Alternatively, the spacer 12 is detachably installed on the rear surface of the rear plate 111 and may be provided in the form of a steel box that can be detached after pouring into the preceding excavation space 91.

Specifically, referring to FIGS. 10 and 11, the spacer 12 is a steel box portion 121 located on the rear surface of the back plate 111 and the steel box portion 121 to the water stop block 11 It may include a clasp 122 that is temporarily fixed. Although not shown in the drawing, the clasp part 122 protrudes upward from the top of the steel box part 121 and may be provided in a form that can be strung on the rear surface of the rear plate 111. Or, referring to FIG. 11, both ends in the width direction of the rear plate 111 are protruded from each end of the steel box portion 121 on both sides in the width direction, respectively (wing portions protruding outward on both sides of the body portion 112). It can be provided in a KEY type so that it can be fixed.

If the spacer 12 is of the form including the steel box portion 121, after pouring for the preceding excavation space 91 (ie, after the initial curing) before excavation for the subsequent excavation space 92, the spacer (12) may be removed (pulled out) or drawn out after a predetermined excavation is performed by pouring equipment such as a grab, and accordingly, excavation by cutter equipment for forming a trailing excavation space 92 such as a BC cutter width can be obtained.

In addition, the index block assembly 1 is arranged to extend vertically from the upper side of the stress member 2, and when interference occurs between the reinforcing bar network and the stress member 2 inserted into the preceding excavation space 91, it informs the occurrence of interference. A separation preventing member 14 may be included. For example, a plurality of stress members 2 may be arranged at intervals up and down. Referring to FIG. 12, the separation preventing member 14 extends vertically and is located above the plurality of stress members 2. It may be a linear member disposed to cross the stress member 2 of the. In this case, the linear member may be made of the same material as the stress member 2, such as a reinforcing bar. When changing the direction and position of the shear reinforcing bars in the continuous wall, the stress member 2 and the gap can be secured. When the reinforcing bar network is inserted into the space 91, if interference between the reinforcing bar network and the stress material 2 occurs or separation of the stress material 2 occurs, whether the interference or the separation of the stress material 2 occurs is a member for preventing separation ( 14) can be visually confirmed from the ground.

In addition, referring to FIGS. 13 and 14, the water stop block assembly 1 is provided in front of the body portion 112 and surrounds the protruding portion of the stress material 2 from the body portion 112 (15). ) may be included. In the protection unit 15, a communication hole communicating vertically may be formed, and portions protruding from the body portion 112 of the plurality of stress members 2 may be positioned in the communication hole. For example, when the direction and position of the shear reinforcement in the continuous wall are changed, the stress member 2 and the gap can be secured, and the water stop block 11 is protected against a certain upper section (eg, upper 3-5 m) section. Part 15 may be installed. That is, 5 to 10 mm joint reinforcing bar protection (protective iron plate) 15 measures can be made. When the protection unit 15 is applied, the protection unit 15 may be installed after the index block assembly 1 is inserted, and the protection unit 15 may be removed after the reinforcing bar network is inserted. In addition, the protection unit 15 may be provided with a latch in a form corresponding to the above-described latch unit, for example, the latch unit protrudes upward from the upper end of the protection unit 15 and is detachable from the water stop block 11 It can be securely fastened.

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

The scope of the present application is indicated by the following claims rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof should be construed as being included in the scope of the present application.

1: index block assembly
11: Waterstop block
111: rear plate
112: body part
1121: groove for inserting water stop material
1122: groove for inserting stress material
1123: step
113: Gago government
1131: block unit
1132: block unit
114: groove forming unit for insertion
12: Spacer
121: steel box part
122: clasp
14: departure prevention member
15: protection part
2: stress material
3: index material
91: preceding excavation space
92 Trailing excavation space
9a: leading panel
9b: trailing panel

Claims (4)

A method of constructing reinforcement for a continuous wall joint in the ground using a block assembly including a block in which a stress material is inserted and installed on the front side,
(a) Using excavation equipment, a preceding excavation space is formed on one side and the other side of the part where the trailing panel is to be formed, and the block assembly is formed so that the rear surface of the block assembly faces one side wall of the preceding excavation space formed on the other side. Arrange and arrange the block assembly so that the rear surface of the block assembly faces the other wall surface of the preceding excavation space formed on one side, but the block assembly has a predetermined distance from the rear surface of one side of the preceding excavation space. including a spacer installed with respect to the rear surface of the block so as to be spaced apart from each other;
(b) forming a preceding panel located on one side and a preceding panel located on the other side by arranging a reinforcing bar network in each of the preceding excavation spaces on one side and the other side and pouring concrete;
(c) forming the following excavation space between the preceding panel on one side and the preceding panel on the other side using excavation equipment;
(d) separating and removing the block assembly from the stress member; and
(e) forming a trailing panel by arranging a reinforcing bar network in the trailing excavation space and pouring concrete;
The preceding excavation space includes a first depth section requiring continuity of the stress material for the continuous underground wall joint and a second depth section, which is the remaining depth section,
In the step (a), the block assembly is disposed corresponding to the first depth section,
In the step (c), the drilling rig, when excavating for forming the trailing excavation space, for at least some of the neighboring plane areas adjacent to the trailing excavation space among the spacing plane areas corresponding to the preset spacing when viewed from a plan view performing parallel excavation;
The spacer is at least partially removed by excavation of the excavation equipment in step (c) or removed in advance between step (b) and step (c), underground continuous wall joint reinforcement construction method. According to claim 1,
By the parallel excavation in step (c), some concrete corresponding to the neighboring flat area among the concrete cast for the second depth section in step (b) is overcut,
By the remaining arrangement of the stress material in step (d), the continuity of the stress material for the underground continuous wall joint is provided. According to claim 1,
The length of the trailing excavation space is set to be smaller than the excavation width of the excavation equipment so that the excavation width of the excavation equipment used in step (c) can cover the neighboring flat area, and the underground continuous wall joint reinforcement construction method. According to claim 1,
The spacer is made of a material that can be cut or crushed by excavation equipment and can float, the underground continuous wall joint reinforcement construction method.

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