JPH04117031U - Partition plate at the joint in a continuous underground wall - Google Patents

Abstract

(57) [Summary] [Purpose] In order to increase the shear strength of the partition plate, there is no need to weld protrusions such as studs or plates to the partition plate as in the past, and sufficient shear strength can be obtained. An object of the present invention is to provide a partition plate for a joint part in a continuous underground wall that can be used for a continuous underground wall. [Structure] The joining part partition plate 10 according to the present invention has a large number of protrusions 11 having a predetermined length L formed on both sides of the partition plate 10, and each of the adjacent protrusions 11 is They are characterized in that they are arranged so that their length directions are substantially perpendicular to each other.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a partition plate used at the joints of various underground walls that form a continuous underground wall.

0002

[Conventional technology]

Conventionally, when forming a continuous underground wall, adjacent underground walls A and B were first separated by With a cutting plate 30 (hereinafter referred to as a partition plate), temporarily partition the underground wall A side, which is the pre-casting side, After this, concrete is poured on the pre-cast side of the partition plate 30 to construct the underground wall A, and then Then, excavate the underground wall B side, which is the later cast side, and add concrete to the later cast side of the partition plate 30. The underground wall B is constructed by pouring REIT, and the partition plate 30 is used to construct the underground wall B. The cleats are connected from front to back.

0003 In this case, the horizontal reinforcing bars 34 used in underground walls A and B are discontinuous on both sides of the partition plate 30. Since the partition plate 30 is continuous, the shear strength of the partition plate 30 decreases.

0004 Furthermore, since the partition plate 30 has a flat plate shape with a flat surface, the partition plate 30 has a flat surface. If it remains in the plate shape, it will not contribute to any increase in shear strength. Therefore, shear strength As shown in FIGS. 3(a) and (b), in order to increase the Projections such as the tad 31 or the plate 32 were welded.

[0005] Note that the plate 32 is approximately spaced apart from the partition plate 30 on both sides of the partition plate 30. Since it is provided so as to protrude vertically, it is effective against shearing force in the horizontal direction (arrow X) However, it has the disadvantage that it is not effective against shear force in the vertical direction (arrow Y), so play Further, a U-shaped joint reinforcement 33 was flare welded to the joint 32.

[0006]

[Problem that the idea aims to solve]

Conventionally, as mentioned above, in order to increase the shear strength at the joints of internal walls, Each member is attached to both sides of the partition plate 30 by welding. Installation work is time-consuming, leading to higher construction costs and longer construction periods. there was.

[0007] This invention was made to solve the above problems, and its purpose is to improve the partition plate. In order to increase shear strength, it is no longer necessary to attach each member by welding as in the past. A concrete joint in a continuous underground wall where sufficient shear strength can be obtained. Our goal is to provide partition plates.

[0008]

[Means to solve the problem]

This invention was made in view of the above purpose, and its gist is to form a continuous underground wall. A partition plate used at the joints of internal walls in each area, which has a predetermined length on both sides of the partition plate. A large number of convex portions having a length are formed, and each of the adjacent convex portions has a longitudinal direction that is opposite to each other. A partition at a joint in a continuous underground wall, characterized by being arranged substantially perpendicular to the It's on the board.

[0009]

[Effect]

A large number of protrusions are formed on both sides of the partition plate, but the protrusions do not penetrate into the concrete. Therefore, the shear strength of this part increases. Also, the direction of increase in shear strength is also Since the length directions of the contacting convex portions are arranged so as to be substantially perpendicular to each other, Evenly distributed in both the horizontal direction (direction of arrow X) and vertical direction (direction of arrow Y) shown in Figure 3. etc. to increase shear strength.

0010

【Example】

The partition plate at the joint part of a continuous underground wall according to the present invention will be explained based on the attached drawings. Ru.

[0011] As shown in FIGS. 1(a) and 1(b), a partition plate (hereinafter referred to as a partition plate) 10 has a large number of substantially rectangular convex portions 11 having a constant length L formed on both sides thereof. The adjacent protrusions 11 are arranged so that their length directions are substantially perpendicular to each other. ing. By forming the convex portion 11 in this way, the horizontal direction shown in FIG. (arrow X direction) and vertical direction (arrow Y direction), shear strength increases equally. It is something to do. Note that by changing the arrangement direction and shape of each convex portion 11, a predetermined shape can be obtained. It is also possible to change the shear force acting in the direction of .

0012 To actually construct a continuous underground wall using the partition plates 10, as shown in Figure 2, For this purpose, the ends of all the horizontal reinforcing bars 20 on the pre-casting side are formed by penetrating the partition plate 10. Ku. Note that the horizontal reinforcing bars 20 protruding toward the post-casting side are used as joint bars 20'.

[0013] The partition plate 10 and horizontal reinforcing bars 20 prepared in advance in this way are placed in a reinforcing bar cage (not shown). erected in the trench on the pre-cast side that was excavated, and concrete was poured at this location. and construct underground wall A (see Figure 3). Next, excavate the post-drilling side to create a groove. horizontal reinforcing bars 21 are installed together with a reinforcing bar cage (not shown). In this case, horizontal The ends of the reinforcing bars 21 are arranged so as to overlap with the joint bars 20'. Then this By placing concrete at the location, the joint reinforcement 20' and the horizontal reinforcement 21 are connected. In this state, underground wall B can be constructed.

[0014] By repeating this process, underground walls are constructed continuously. Ru. At this time, at the connection points of each middle wall, the protrusions 11 of the partition plate 10 are installed on both sides. It plays the role of transmitting horizontal and vertical shear forces by being embedded in concrete. Fulfill. Note that the height of the convex portion 11 is preferably about 2 to 5 mm, but if necessary It is also possible to change it depending on the situation.

[0015]

【effect】

According to the partition plate at the joint part of a continuous underground wall according to the present invention, there are many parts on both sides of the partition plate. Since several protrusions have been formed, the protrusions will sink into the concrete, so please avoid placing these parts on the concrete. Shear strength increases. Further, the length direction of each of the adjacent convex portions is substantially perpendicular to each other. Since the shear strength is the same from the horizontal to the vertical direction of the partition plate, It increases almost equally.

[0016] Therefore, unlike conventional methods, each protruding member to increase shear strength is not installed on the partition plate. There is no need to weld each piece to attach it, reducing construction costs and construction time. becomes possible.

[Brief explanation of drawings]

[Fig. 1] Fig. 1(a) is a plan view showing a partition plate for a splicing part in a continuous underground wall according to the present invention, and Fig. 1(b) is a plan view showing
It is a sectional view showing a partial section of the partition plate of (a).

FIG. 2 is a perspective view showing a state in which horizontal reinforcing bars penetrate through a partition plate of a splicing part in a continuous underground wall according to the present invention.

[Fig. 3] Fig. 3(a) is a plan view showing a connecting part of an underground wall using a conventional splicing part partition plate, and Fig. 3(b) is a perspective view showing a conventional splicing part partition plate. It is.

[Explanation of symbols]

10 Partition plate for joining part 11 Convex part 20 Horizontal reinforcing bars 20′ joint bar 21 Horizontal reinforcement

Claims (1)

[Scope of utility model registration request] Claim 1: A partition plate used at the joints of various underground walls forming a continuous underground wall, the partition plate having a large number of protrusions each having a predetermined length formed on both sides thereof, and adjacent to each other. A partition plate for a joint part in a continuous underground wall, characterized in that the respective convex parts are arranged so that their length directions are substantially perpendicular to each other.