JP4696709B2 - Wall panel joint structure, underground continuous wall construction method, and underground continuous wall - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a wall panel joint structure, an underground continuous wall construction method, and an underground continuous wall, and in particular, a wall panel joint structure, an underground continuous wall construction method, and an underground continuous wall that can ensure high vibration isolation performance. On the wall.

  Conventionally, underground structures constructed close to traffic roads such as roads and railways are integrated with the underground structures to prevent transmission of vibrations and noise from vehicles traveling on the traffic road. An anti-vibration structure is provided.

For example, Patent Document 1 discloses excavation of a ground to form an excavation hole, and a concrete rod is placed in the excavation hole after inserting a reinforcing bar with a vibration-proof material attached to the surface on the underground structure side. By doing so, a construction method is described that constructs an underground continuous wall in which the surface of the underground continuous wall of the underground continuous wall is covered with a vibration damping material.
JP-A-3-257226

  However, in the above construction method, a gap may be generated at the joint portion of the vibration isolator due to construction error or unevenness of the excavation hole. If such a gap is generated, noise of a traffic vehicle or the like enters and the soundproofing / vibrationproofing effect is significantly reduced.

Therefore, an object of the present invention is to provide a wall panel joint structure, a construction method for underground continuous walls, and an underground continuous wall that can connect the vibration isolation materials without gaps to ensure soundproofing and vibration isolation performance. That is.

The wall panel joint structure of the present invention is a wall panel joint structure that joins the wall panels constituting the underground continuous wall, and each wall panel is attached so as to cover the panel main body and the outer wall side of the panel main body. And an anti-vibration material provided so that an end thereof is exposed to the inner wall side of the panel body, and concrete is placed between the anti-vibration materials of adjacent wall panels, A joint vibration isolating member is attached from the inner wall side so as to cover the exposed end surface of the vibration isolating material.

According to the above-mentioned wall panel joint structure, the joint end face of the vibration-proof material is exposed on the surface of the underground structure wall side of the underground continuous wall, so that it is exposed visually during the root cutting work. After confirming the above, the connection portion vibration-proof member can be attached. Thereby, a connection part vibration isolator can be reliably attached to the end surface which the vibration isolator exposed, and a vibration proofing and soundproofing performance can be improved.
Moreover, this invention includes the underground continuous wall characterized by joining adjacent wall panels by the joining structure of said wall panel.

  According to the above-mentioned underground continuous wall, since the surface of the underground continuous wall on the underground structure side is exposed, a stud or the like can be attached and the underground continuous wall and the outer wall of the underground structure can be constructed integrally. . Thereby, the underground continuous wall used only for the retaining wall for the root cutting work can be used as a part of the outer wall of the underground structure, and the construction period can be shortened and the cost can be reduced.

Furthermore, the present invention is the above-described method for constructing an underground continuous wall, in which an excavation hole is formed by excavating the ground corresponding to the preceding wall panel, and the end of the preceding wall panel on the wall panel side. Kenkomi the partition plate at a position corresponding to section, said like an anchor a vibration-proof material of the prior wall panels, pre Symbol like an anchor a reinforcing bar cage in the excavation hole, constituting a wall panel of the preceding the drill hole concrete was Da設, after the concrete has cured, remove the partition plate, striking the concrete between the vibration-proof material of the wall panels of the vibration proof material and the trailing wall panels of the prior After building the underground continuous wall by repeating the process, excavate the building side of the underground continuous wall and prevent the joint from the inner wall side so as to cover the exposed end face of the vibration isolation material of the adjacent wall panel Also includes a method for constructing an underground continuous wall characterized by attaching a vibration member To.

  According to the method for joining wall panels of the present invention, the joint end face of the vibration isolator is exposed on the surface of the underground continuous wall on the underground structure wall side, so that it is exposed visually during the root cutting work. After confirming this, the connection portion vibration-proof member can be attached. Moreover, according to the underground continuous wall of this invention, since an underground continuous wall and the outer wall of an underground structure can be formed integrally, cost reduction is possible.

Hereinafter, one embodiment of the underground continuous wall 10 of the present invention will be described with reference to the drawings.
FIG. 1 is a vertical sectional view showing the underground continuous wall 10. As shown in the figure, the underground structure 12 is constructed in the ground G, and the underground continuous wall 10 is integrally provided so as to surround the periphery of the underground structure 12. The underground continuous wall 10 includes an underground continuous wall main body 13 and an anti-vibration rubber layer 11 constructed integrally with the underground continuous wall main body 13. As will be described in detail below, the anti-vibration rubber layer 11 is connected to the anti-vibration rubber 14 attached to the outer wall side of each wall panel 2 and the joint anti-vibration connected so as to cover the adjoining end surface of the anti-vibration rubber 14. It consists of a vibration rubber 15. The anti-vibration rubber layer 11 has a function of absorbing traffic noise and vibration propagated from the ground G side and suppressing transmission to the underground structure 12 side.

  FIG. 2 is a cross-sectional view of the underground continuous wall 10. As shown in the figure, the anti-vibration rubber layer 11 covers a gap between a plurality of anti-vibration rubbers 14 juxtaposed in the wall width direction of the underground continuous wall 10 and a joint portion between adjacent anti-vibration rubbers 14. It is comprised by the provided joint part anti-vibration rubber | gum 15. The anti-vibration rubber 14 is a rubber member disposed on the outer wall side of the underground continuous wall 10, and both end surfaces thereof are bent and exposed on the surface of the underground continuous wall 10 on the underground structure 12 side. The joint vibration isolating rubber 15 is connected to the exposed end surface 14S of the vibration isolating rubber 14 so as to cover it. Near the center of both end faces of the anti-vibration rubber 14 in the wall width direction protrudes inward of the anti-vibration rubber 14.

  The underground continuous wall body 13 includes a concrete panel 16 and a reinforcing bar 17 embedded in the concrete panel 16. The concrete panel 16 is divided into a plurality of concrete panels 16A and 16B by a vibration isolating rubber 14, and each wall panel 2 is composed of the concrete panels 16A and 16B and the vibration isolating rubber 14.

Next, a procedure for constructing the underground continuous wall 10 will be described.
FIGS. 3 to 8 are cross-sectional views of the joint structure 1 of the anti-vibration rubber 14 for explaining the procedure for constructing the underground continuous wall 10. Since the underground continuous wall 10 can be used as a retaining wall when the underground structure 12 is constructed, it is constructed prior to the underground structure 12. First, as shown in FIG. 3, a portion of the ground corresponding to the preceding wall panel 2A is excavated using an excavator. Then, a partition plate 19 is installed on the rear panel side of the excavation hole 18. The partition plate 19 is a steel member having a shape substantially equal to the vertical cross section of the excavation hole 18 in the wall thickness direction, and can be built in the excavation hole 18 without a gap.

  Next, the preceding anti-vibration rubber 14A is installed. The anti-vibration rubber 14 is constructed by connecting a plurality of plate-like anti-vibration rubbers, and the anti-vibration rubbers are connected to each other with screws without any gaps. When the screw is attached, if the vibration-proof rubber is penetrated, the vibration-proof / sound-proof effect is lowered. Therefore, the length of the screw is appropriately selected and used.

  Next, as shown in FIG. 4, the reinforcing bar rod 17 is built in the excavation hole 18. The reinforcing bar rod 17 is provided with a spacer 20 for ensuring a certain distance between the reinforcing bar rod 17 and the anti-vibration rubber 14. After the reinforcing bar 17 is built, concrete is placed in the portion of the excavation hole 18 that is partitioned by the partition plate 19. A concrete panel 16A is constructed by hardening the placed concrete, whereby the preceding wall panel 2A is formed.

  Next, as shown in FIG. 5, as in the case where the preceding wall panel 2A is constructed, a portion corresponding to the wall panel 2B following the ground is excavated. After excavation is completed, the partition plate 19 is removed and moved to a position corresponding to the end of the subsequent wall panel 2B in the excavation hole.

  Next, as shown in FIG. 6, the anti-vibration rubber 14 </ b> B is installed in the excavation hole 18. Next, as shown in FIG. Then, concrete is placed in a portion corresponding to the subsequent concrete panel (16B in FIG. 8). At the same time, concrete is also placed in the portion 21 between the anti-vibration rubber 14A for the anti-digging and the anti-vibration rubber 14B for the subsequent. At this time, the concrete can be placed easily by inserting the treme tube between the protrusions provided on both end surfaces of the vibration isolating rubber 14 in the wall width direction and pouring the concrete.

Further, cement bentonite is injected into the ground G in the vicinity of the joint between the vibration isolating rubbers 14A and 14B. Thereby, the clearance gap between the anti-vibration rubber | gum 14 near the junction part and the ground G can be filled, and a water stop can be improved.
The underground continuous wall body 13 is formed by repeating the above operations and constructing the wall panel 2.

  After the underground continuous wall body 13 is constructed, a portion corresponding to the underground structure 12 is excavated using the underground continuous wall body 13 as a retaining wall. At this time, it is visually confirmed from the underground structure 12 side that the end surfaces 14S of the anti-vibration rubbers 14A and 14B are exposed. And as shown in FIG. 8, the vibration isolator rubber layer 11 is attached by attaching the junction vibration isolator rubber 15 so that the end surface 14S of the anti-vibration rubber 14 exposed to the inner wall side wall surface of the underground continuous wall 10 may be covered. The underground continuous wall 10 provided with can be constructed. If there is unevenness in the exposed part of the anti-vibration rubber 14, a thin rubber member is interposed between the end face 14S of the anti-vibration rubber 14 and the anti-vibration rubber 15 so as to prevent unevenness. Adjust and install.

  According to the connection structure 1 of the vibration isolating rubber 14 described above, the following effects can be obtained. Since the joint end surface 14S of the anti-vibration rubber 14 is exposed on the surface of the underground structure 12 side, when the ground on the underground structure 12 side of the underground continuous wall 10 is excavated by rooting work or the like, it is visually checked. It is possible to attach the joint vibration isolating rubber 15 without any gap while confirming with the above. For this reason, a clearance gap does not arise between adjacent anti-vibration rubber | gum 14, and sound-proof and anti-vibration performance can be improved.

  Moreover, in the conventional method disclosed in Patent Document 1, the vibration isolating rubber is attached to the underground structure so as to cover the underground structure side of the concrete panel, so that the underground continuous wall and the underground structure are integrated. Could not be formed. However, according to the underground continuous wall of this embodiment, a stud etc. can be attached to the surface of the underground continuous wall on the underground structure side, and the underground continuous wall and the outer wall of the underground structure can be constructed integrally. Thereby, the underground continuous wall used only for the retaining wall can be used as a part of the underground structure, and the construction period can be shortened and the cost can be reduced.

It is a vertical direction sectional view showing an underground continuous wall. It is horizontal direction sectional drawing which shows the joining structure of a wall panel. It is horizontal direction sectional drawing for demonstrating the construction method of an underground continuous wall (the 1). It is horizontal direction sectional drawing for demonstrating the construction method of an underground continuous wall (the 2). It is horizontal direction sectional drawing (the 3) for demonstrating the construction method of an underground continuous wall. It is horizontal direction sectional drawing for demonstrating the construction method of an underground continuous wall (the 4). It is horizontal direction sectional drawing for demonstrating the construction method of an underground continuous wall (the 5). It is horizontal direction sectional drawing for demonstrating the construction method of an underground continuous wall (the 6).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wall panel joining structure 2 Wall panel 2A Previous wall panel 2B Subsequent wall panel 10 Underground continuous wall 11 Anti-vibration rubber layer 12 Underground structure 13 Underground continuous wall main body 14 Anti-vibration rubber 14A Previous anti-vibration rubber 14B Anti-vibration rubber following 14S Joint end face 15 Anti-vibration rubber 16, 16A, 16B Concrete panel 17 Reinforcing bar 18 Excavation hole 19 Partition plate 20 Spacer

Claims (3)

A wall panel joining structure for joining wall panels constituting the underground continuous wall,
Each wall panel is provided with a panel body and a vibration isolator that is attached so as to cover the outer wall side of the panel body, and an end portion thereof is exposed to the inner wall side of the panel body,
Concrete is placed between the anti-vibration members of adjacent wall panels,
A wall panel joining structure, wherein a joint vibration isolating member is attached from an inner wall side so as to cover an exposed end surface of the vibration isolating material of an adjacent wall panel. Diaphragm wall, characterized in that formed by joining the adjacent wall panel by bonding structure of the wall panel of claim 1, wherein. It is a construction method of the underground continuous wall according to claim 2,
Excavating the ground corresponding to the preceding wall panel to form a drilling hole
A partition plate is installed at a position corresponding to the end of the preceding wall panel on the side of the subsequent wall panel,
Incorporating the anti-vibration material of the preceding wall panel,
Like an anchor the rebar cage before Symbol drilling hole,
Placing concrete that constitutes the preceding wall panel in the excavation hole;
After the concrete has cured, remove the partition plate,
Placing concrete between the anti-vibration material of the preceding wall panel and the anti-vibration material of the following wall panel;
After building the underground continuous wall by repeating the process,
An underground continuous wall construction method comprising excavating a building side of a continuous underground wall and attaching a joint vibration isolation member from an inner wall side so as to cover an exposed end surface of the vibration isolation material of an adjacent wall panel .

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