JP2003328454A - Joint cut-off coupling of concrete structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint cut-off coupling for a concrete structure capable of keeping cut-off by expandably deforming while sufficiently following the joint even if a cruciform or a T-shaped joint opens in either direction and capable of being manufactured regardless of the thickness of a flexible cut-off member and easily restoring from an elongated state to an original state. <P>SOLUTION: The flexible cut-off member has an expandable part (4) with an arcuate section and fixing parts (5) at the both ends. A first linearly stretching flexible cut-off member (2) and a second flexible cut-off member (3) stretching so as to intersect the first cut-off member are integrally formed. The flexible cut-off member is arranged so as to cover the joints between a plurality of concrete structures (6, 7, 8, 9) of which the expansible parts adjoin to each other and the fixing parts are fixed to respective concrete structures. An inclined part (17) allowing the expandable part in the intersection (16) of the first flexible cut-off member and the second flexible cut-off member to expand or contract following the deformation between the adjacent concrete structures is formed as an expanding contracting part (4) in the intersection (16). <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross-shaped or T-shaped joint water stop joint for a concrete structure such as a floor plate of a distribution reservoir.

[0002]

2. Description of the Related Art As a cross-shaped joint water stop joint for a concrete structure such as a floor plate of a distribution reservoir, a flexible water stop member having a V-shaped (or U-shaped) cross section is used as shown in FIG. There are fittings to use. The flexible water blocking member a of this joint is
An elastic portion b integrally formed in a cross shape and flat fixing portions c on both sides thereof are arranged, and the flexible water blocking member a is arranged so as to cover the joint e between the four adjacent concord structures, The fixing part c is fixed to each concrete structure with an anchor f.

[0003]

The above V-shape (or U)
A joint that uses a cross-shaped flexible waterproof member with a
When the joint is opened in the X direction or the Y direction due to an earthquake or the like, the stretchable portion b of the V-shaped cross section can be expanded and expanded in accordance with the displacement of the joint in the portion other than the intersection d. At the intersecting portion d, the cross-sectional shape of the member is not a V-shaped (or U-shaped) cross-sectional shape but a linear shape, so that the material can only grow within the allowable elongation rate of the material at this portion, There is a problem that it is not possible to follow the wide opening of the joint.

To solve this problem, the applicant has
Previously, the joint water stop joint shown in JP 2001-20393 A was proposed. According to this joint, the flexible water blocking member includes the first seat portion and the second seat portion extending in a cross shape or a T shape from a part of the side edge portion thereof. Has a second fold that is folded along the fold in a direction intersecting the fold of the first fold to have the same cross-sectional shape as the fold of the second sheet portion. Since the folded portion is integrally connected to the folded portion of the second sheet portion so as to be continuous with the folded portion, the flexible water blocking member will have this joint regardless of the direction in which the cross-shaped or T-shaped joint is opened. It can be deployed following the opening of the water and can maintain the water stop.

This water shutoff joint can be easily manufactured when the thickness of the flexible water blocking member is relatively thin, but it is difficult to manufacture when the thickness of the flexible water blocking member becomes large. . When the joints return to their original state after the first and second sheet parts have expanded following the opening of the joints, these sheet parts remain in their expanded state and are properly folded. There is a problem that it is not always possible to return to.

The present invention has been made in view of the problems of the above-mentioned conventional techniques, and when joints formed between a plurality of concrete structures intersect in a cross shape or a T shape, the joints are jointed. No matter which direction is opened, it is possible to keep the water still by sufficiently expanding and contracting to follow this, and to manufacture regardless of the thickness of the flexible water blocking member, and An object of the present invention is to provide a joint water-stop joint for a concrete structure in which the joint can return to its original state when the joint returns to its original state.

[0007]

A joint water stop joint for a concrete structure according to the present invention for solving the above-mentioned problems is a stretchable portion made of rubber / synthetic resin and having an arch-shaped cross section. A flexible water blocking member having a fixing portion, the first flexible water blocking member extending linearly, and the second flexible water extending so as to intersect with the first flexible water blocking member. A joint stop for a concrete structure, which is integrally formed with a water blocking member, and in which the expansion / contraction part is arranged so as to cover the joint between a plurality of adjacent concrete structures, and the fixing part is fixed to each concrete structure. In the water joint, an inclined portion that allows expansion and contraction of the expansion and contraction portion at the intersection where the first and second flexible water blocking members intersect in accordance with the displacement between the adjacent concrete structures is formed at the intersection. It is characterized in that it is formed in the stretchable part Than it is.

One aspect of the present invention is characterized in that the inclined portion has a concavely inclined shape.

Another aspect of the present invention is characterized in that the inclined portion has a convexly inclined shape.

[0010]

According to the present invention, the inclined portion which allows the expansion and contraction of the expansion and contraction portion at the intersection of the first and second flexible water blocking members following the displacement between the adjacent concrete structures is expanded and contracted at the intersection. Since the joint is formed in the portion, even if the cross-shaped or T-shaped joint is displaced in any direction, the inclined portion expands and contracts following the displacement of the joint, so that the elastic portion of the flexible water blocking member is It can be expanded and contracted sufficiently including the crossing part, and still water can be maintained. Further, the flexible water blocking member can be manufactured regardless of the thickness, and the joint can be restored to the original state when the joint returns to the original state from the opened joint.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show one embodiment of the present invention, FIG. 1 is a perspective view of a joint water-stop joint, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a sectional view taken along line BB of FIG. 4 and 5 are perspective views showing a state in which the joint extends in the X direction and the Y direction.

The joint water stop joint 1 is a flexible water stop member having a V-shaped arch-shaped expansion / contraction part 4 made of rubber / synthetic resin and having a cross-section protruding upward and fixing parts 5 on both sides thereof. A first flexible water blocking member 2 extending linearly and a second flexible water blocking member 3 extending so as to intersect the first flexible water blocking member in a cross shape are integrally formed. It will be. Joints 10, 1 between a plurality of concrete structures 6, 7, 8, 9 which are adjacent to each expandable portion 4 of this joint 1, respectively.
1, 12, 13 are arranged so as to cover them, and each fixing portion 5 is fixed to each concrete structure 6, 7, 8, 9 by an anchor bolt 15 via a holding plate 14.

The protrusion 4a of the expansion / contraction portion 4 at the intersection 16 of the first and second flexible water blocking members 2 and 3 follows the displacement between the adjacent concrete structures 6, 7, 8 and 9. As a result, an inclined portion 17 is formed that allows the protrusion 4a of the expandable portion 4 to expand and contract.

In this embodiment, the inclined portion 17 is formed as an inclined portion which is inclined in a concave shape of the expandable portion 4. That is, the inclined portion 17 is formed by a cross-shaped recess extending in the longitudinal direction of the protrusion 4 a of the expansion / contraction portion 4, and the first flexible water blocking member 2 is provided.
As shown in FIG. 2, the respective inclined portion portions of the second flexible water blocking member 3 are cut in the AA direction of FIG. 1, and the intersection portions from the both end portions 17a, 17a of the inclined portion 17 are shown in FIG. 16 heart 1
6a is formed as inclined surfaces 17b, 17b which gradually descend toward 6a.
When viewed in the −B direction, as shown in FIG. 3, it has a shape composed of two peak portions 17c, 17c and a valley portion 17d between them.

The operation of the joint 1 will be described. When one or more of the concrete structures 6, 7, 8, 9 are expanded and contracted due to an earthquake or the like, the corresponding expansion and contraction portions 4 of the first and second flexible water blocking members 2 and 3 are It expands and contracts following the displacement of 7, 8, and 9. In this case, in the stretchable portion 4, the inclined portion 17 of the stretchable portion 4 can be expanded or contracted, so that the displacement of the concrete structures 6, 7, 8 and 9 is similar to the other portions of the stretchable portion 4. It can be expanded and contracted following suit. Therefore, the expansion / contraction part 4 as a whole can be sufficiently expanded / contracted and deformed, and water stopping can be sufficiently maintained. As an example, FIG. 4 is a perspective view showing an expanded state of the expansion / contraction part 4 of the joint 1 when the concrete structures 6, 7, 8, 9 are expanded in the X direction and the Y direction.

5 to 7 show another embodiment of the present invention. FIG. 5 is a perspective view thereof, FIG. 6 is a sectional view taken along line AA of FIG. 5, and FIG. 7 is a sectional view taken along line BB of FIG. It is a figure. In this embodiment and the embodiments described below, the same components as those of the embodiment of FIGS. 1 to 4 are designated by the same reference numerals, and detailed description thereof will be omitted.

In this embodiment, the inclined portion 20 is formed as an inclined portion which is inclined in a convex shape of the expandable portion 4. That is, the inclined portion 20 is formed of a cross-shaped convex portion, and the inclined portions of the first flexible water blocking member 2 and the second flexible water blocking member 3 are cut in the AA direction of FIG. As shown in FIG. 6, the inclined surface 20 that gradually rises from both ends 20a, 20a of the inclined portion 20 toward the center 16a of the intersection 16 as shown in FIG.
5b and 20b, the inclined portion 20 is cut in the BB direction in FIG. 5, and as shown in FIG. 7, it has a shape including a protrusion having one peak 20a. .

The shape of the sloping portion at the intersection 16 is not limited to the concave or convex V-shaped sloping portion in each of the above-described embodiments, but other shapes such as a sloping portion having a U-shaped cross section as shown by reference numeral 30 in FIG. May be

FIG. 9 is a perspective view showing another embodiment of the present invention. In this embodiment, the inclined portion 32 is similar to the embodiment of FIG. 1 in that it is a cross-shaped concave inclined portion,
Unlike the embodiment of FIG. 1, the cross-shaped inclined portion 32 is formed not to extend in the longitudinal direction of the protruding portion 4a of the expandable portion 4 but to extend at an angle of about 45 degrees with the longitudinal direction of the protruding portion 4a.

FIG. 10 is a perspective view showing another embodiment of the present invention. In this embodiment, the joints 10, 11, 12, 13 between the concrete structures are provided with the grooves 10a, 11
a, 12a, 13a are formed, and the elastic portion 40 of the flexible water blocking members 2, 3 is formed as a recess 40a having a reverse arch-shaped cross section, and the grooves 10a, 11a, 12a,
It is housed in 13a. The inclined portion 42 has a concave portion 40a.
Is formed as a cross-shaped inclined surface that gradually rises from the bottom surface of the cross section 16 toward the center of the intersection 16.

Although various examples of the slanted portion of the expandable portion have been described above, the shape of the slanted portion is not limited to the above example, and the point is that the cross section in the longitudinal direction of each flexible water blocking member at the intersection is linear. However, any shape may be used as long as it has a slack of some shape and allows the expansion and contraction of the expansion and contraction portion at the intersection following the relative displacement between the adjacent concrete structures, The number of convex portions or concave portions is not limited to one, and a plurality of continuous portions may be used.

In the present specification, "arch shape"
Is used to mean not only the arch shape shown in FIGS. 1 and 5 but also the inverted arch shape shown in FIG. The arch-shaped expansion / contraction part is not limited to one V-shaped or U-shaped, but may be formed in a plurality of wavy shapes such as V-shaped or U-shaped. For example, FIG. 11 which is a modification of the embodiment of FIG.
Like the embodiment shown in the perspective view of FIG.
The 0 may be formed in a shape in which two V-shaped shapes are continuous.

[0023]

As described above, according to the present invention, the expansion and contraction of the expansion and contraction portion at the intersection of the first and second flexible water blocking members is allowed to follow the displacement between the adjacent concrete structures. Since the slanted portion is formed in the stretchable portion at the intersection, even if the cross-shaped or T-shaped joint is displaced in any direction, the slanted portion expands and contracts in accordance with the displacement of the joint, thereby providing flexibility. The stretchable portion of the water shut-off member, including the crossing portion, can be stretched and stretched sufficiently to keep the water shut off. Further, the joint of the present invention can be manufactured regardless of the thickness of the flexible water blocking member, and the joint can return to its original state when the joint returns to its original state.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a perspective view showing a state where the joint extends in the X direction and the Y direction.

FIG. 5 is a perspective view showing another embodiment of the present invention.

6 is a cross-sectional view taken along the line AA of FIG.

7 is a sectional view taken along line BB of FIG.

FIG. 8 is a cross-sectional view showing another shape of the inclined portion.

FIG. 9 is a perspective view showing another embodiment of the present invention.

FIG. 10 is a perspective view showing another embodiment of the present invention.

FIG. 11 is a perspective view showing another embodiment of the present invention.

FIG. 12 is a perspective view showing a conventional cross joint.

[Explanation of symbols]

1 earth stop fitting 2 First flexible water blocking member 3 Second flexible water blocking member 4, 40, 50 telescopic part 5 Fixed part 6,7,8,9 Concrete structure 10, 11, 12, 13 joints 16 intersection 17, 20, 30, 32, 42 Inclined part

Claims (3)

[Claims] 1. A flexible waterproof member having a stretchable portion made of rubber and synthetic resin and having an arch-shaped cross section and fixing portions on both sides thereof, the first flexible waterproof member extending linearly. The first
And a second flexible water blocking member that extends so as to intersect with the flexible waterproofing member, and the stretchable portion is arranged so as to cover joints between a plurality of adjacent concrete structures. Then, in the joint waterproof joint of the concrete structure that fixes the fixing portion to each concrete structure, the first joint is followed by the displacement between the adjacent concrete structures.
And a joint waterproof joint for a concrete structure, wherein an inclined portion that allows expansion and contraction of the expansion and contraction portion at an intersection where the second flexible waterproof member intersects is formed at the expansion and contraction portion at the intersection. 2. The joint according to claim 1, wherein the inclined portion has a concavely inclined shape. 3. The joint according to claim 1, wherein the inclined portion has a convexly inclined shape.