JP3670621B2 - Joint joints for concrete structures - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cross-shaped or T-shaped joint water-stopping joint for a concrete structure such as a floor plate of a distribution reservoir.
[0002]
[Prior art]
As shown in FIG. 12, there is a joint that uses a flexible water-stopping member having a V-shaped (or U-shaped) cross-sectional shape as a cross-shaped joint water-stopping joint for a concrete structure such as a floor pond of a reservoir. . A flexible water-stop member a of the joint is composed of a stretchable part b integrally formed in a cross shape and flat fixing parts c on both sides thereof, and the flexible water-stop member a is disposed between four adjacent concolate structures. The fixing part c is fixed to each concrete structure with an anchor f.
[0003]
[Problems to be solved by the invention]
The joint using the cross-shaped flexible water blocking member having the V-shaped (or U-shaped) cross section is V-shaped at a portion other than the intersection d when the joint is opened in the X direction or the Y direction due to an earthquake or the like. The expansion / contraction part b of the cross section can be expanded to follow the displacement of the joint, but at the crossing part d, the cross-sectional shape of the member is not a V-shaped (or U-shaped) cross-sectional shape but a straight line. Therefore, there is a problem that the material can be stretched only within the range of the allowable elongation of the material of this portion, and cannot follow the large opening of the joint.
[0004]
In order to solve this problem, the present applicant has previously disclosed Japanese Patent Application Laid-Open No. 2001-20393.
The joint water-stopping joint shown in the official gazette was proposed. According to this joint, the flexible water blocking member includes the first sheet portion and the second sheet portion that extends in a cross shape or a T shape from a part of the side edge portion of the first sheet portion. Has a second fold part folded in the same cross-sectional shape as the fold part of the second sheet part along the fold in the direction intersecting the fold of the first fold part, and this second fold part Since the folding part is integrally connected to the folding part of the second sheet portion, the flexible water-stopping member will remain in this joint no matter which direction the cross-shaped or T-shaped joint opens. It can be developed following the opening of the water, and water stoppage can be maintained.
[0005]
This water-stopping joint can be easily manufactured when the thickness of the flexible water-stopping member is relatively thin, but there is a difficulty that the manufacturing becomes difficult when the thickness of the flexible water-stopping member is increased. Also, when the joint is closed and restored to the original state after the first and second sheet parts are expanded following the opening of the joints, the sheet parts remain unfolded and properly folded. However, there is a problem that it cannot always be restored.
[0006]
The present invention has been considered in view of the above problems of the prior art, and when the joint formed between a plurality of concrete structures intersects in a cross or T shape, Even if it opens in the direction, the water stoppage can be maintained by following the expansion and contraction sufficiently, and it can be manufactured regardless of the thickness of the flexible waterstop member, and the joint is open. It is an object of the present invention to provide a joint water-stop joint for a concrete structure that can return the joint to its original state when it returns to its original state.
[0007]
The joint waterproofing joint for a concrete structure according to the present invention according to claim 1, which solves the above-mentioned problems, is a flexible waterproofing member having an arch-shaped stretchable part made of rubber and synthetic resin and fixing parts on both sides thereof. A first flexible water blocking member extending linearly and a second flexible water blocking member extending so as to intersect the first flexible water blocking member are integrally formed. In the joint water-stop joint of a concrete structure in which the stretchable portion is arranged so as to cover the joint between the plurality of adjacent concrete structures, and the fixing portion is fixed to each concrete structure, the adjacent concrete structure In accordance with the displacement between the first and second flexible water-stop members , a slanting portion inclined in a concave shape allowing the expansion and contraction of the expansion / contraction portion at the intersection is formed in the expansion / contraction portion at the intersection. It is characterized by this.
[0010]
[Action]
According to the present invention, the inclined portion that allows the expansion / contraction of the expansion / contraction portion at the intersection of the first and second flexible water-stopping members to follow the displacement between the adjacent concrete structures is formed in the expansion / contraction portion at the intersection. Therefore, even if the cross-shaped or T-shaped joint is displaced in any direction, the slanted portion expands and contracts following the displacement of the joint, so that the flexible waterproofing member expands and contracts its intersection. It can fully expand and contract, and can maintain water stoppage. Moreover, it can be manufactured regardless of the thickness of the flexible water-stopping member, and the joint can be restored to the original state when the joint is restored from the open state.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
1 to 4 show an 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 in FIG. 1, and FIG. 3 is a sectional view taken along line BB in FIG. 4 and 4 are perspective views showing a state in which the joint is extended in the X direction and the Y direction.
[0012]
The joint water-stopping joint 1 is a flexible water-stopping member having a V-shaped arch-shaped expansion / contraction part 4 made of rubber / synthetic resin and projecting upward in a cross section, and fixing parts 5 on both sides thereof. A first flexible waterproofing member 2 that extends and a second flexible waterproofing member 3 that extends so as to cross the first flexible waterproofing member in a cross shape. It is. The expansion / contraction portions 4 of the joint 1 are arranged so as to cover the joints 10, 11, 12, and 13 between the adjacent concrete structures 6, 7, 8, and 9, respectively, and the fixing portions 5 are held by the pressing plates 14 respectively. Are fixed to the concrete structures 6, 7, 8, 9 by anchor bolts 15.
[0013]
The protrusion 4a of the expansion / contraction part 4 at the intersection 16 of the first and second flexible water-stop members 2, 3 follows the displacement between the adjacent concrete structures 6, 7, 8, 9 to expand / contract. An inclined portion 17 that allows expansion and contraction of the four protrusions 4a is formed.
[0014]
In the present embodiment, the inclined portion 17 is formed as an inclined portion that is inclined in a concave shape of the extendable portion 4. That is, the inclined portion 17 is formed of a cross-shaped concave portion that extends in the longitudinal direction of the protrusion 4 a of the extendable portion 4, and each inclined portion portion of the first flexible waterproof member 2 and the second flexible waterproof member 3. 1, when viewed in a direction AA in FIG. 1, inclined surfaces 17b, 17b gradually descending from both ends 17a, 17a of the inclined portion 17 toward the center 16a of the intersecting portion 16, as shown in FIG. When this inclined portion 17 is cut in the BB direction in FIG. 1, as shown in FIG. 3, it has a shape composed of two peak portions 17c and 17c and a valley portion 17d therebetween. ing.
[0015]
The operation of the joint 1 will be described. When one or more of the concrete structures 6, 7, 8, 9 expand and contract due to an earthquake or the like, the corresponding elastic parts 4 of the first and second flexible waterproofing members 2, 3 It expands and contracts following the displacement of 7, 8, and 9. In this case, at the intersection 16, the expansion / contraction part 4 can be expanded or contracted by the inclined part 17, so that the displacement of the concrete structures 6, 7, 8, 9 is similar to the other parts of the expansion / contraction part 4. It can be expanded and contracted. Therefore, the expansion / contraction part 4 can fully expand and contract as a whole, and water stopping can be sufficiently maintained. FIG. 4 is a perspective view showing, as an example, an extended state of the expansion / contraction part 4 of the joint 1 when the concrete structures 6, 7, 8, 9 are extended in the X direction and the Y direction.
[0016]
5 to 7 show other embodiments of the present invention, FIG. 5 is a perspective view thereof, FIG. 6 is a cross-sectional view taken along line AA in FIG. 5, and FIG. 7 is a cross-sectional view taken along line BB in FIG. . In this embodiment and the embodiment described later, the same components as those in the embodiment of FIGS.
[0017]
In this embodiment, the inclined portion 20 is formed as an inclined portion that is inclined in a convex shape of the stretchable portion 4. That is, the inclined portion 20 is formed of a cross-shaped convex portion, and each inclined portion portion of the first flexible waterproof member 2 and the second flexible waterproof member 3 is cut in the direction AA in FIG. As shown in FIG. 6, the inclined portions 20 are formed as inclined surfaces 20 b and 20 b that gradually rise from both end portions 20 a and 20 a of the inclined portion 20 toward the center 16 a of the intersecting portion 16. 5, when viewed in the BB direction, as shown in FIG. 7, it has a shape composed of a protrusion having one peak 20a.
[0018]
The shape of the inclined portion in the intersecting portion 16 is not limited to the concave or convex V-shaped inclined portion in each of the above-described embodiments, and may be other shapes such as an inclined portion having a U-shaped cross section as indicated by reference numeral 30 in FIG. Also good.
[0019]
FIG. 9 is a perspective view showing another embodiment of the present invention. In this embodiment, the inclined portion 32 is the same as the embodiment of FIG. 1 in that the inclined portion 32 is a cross-shaped concave inclined portion. However, unlike the embodiment of FIG. It is formed so as to extend at an angle of about 45 degrees with the longitudinal direction of the protrusion 4a, not with the longitudinal direction of the portion 4a.
[0020]
FIG. 10 is a perspective view showing another embodiment of the present invention. In this embodiment, grooves 10a, 11a, 12a, and 13a are formed in joints 10, 11, 12, and 13 between concrete structures, and the stretchable portions 40 of the flexible water-proof members 2 and 3 are inverted arches. It is formed as a recess 40a having a cross section in the shape and is accommodated in the grooves 10a, 11a, 12a, 13a. The inclined portion 42 is formed as a cross-shaped inclined surface that gradually rises from the bottom surface of the recess 40 a toward the center of the intersecting portion 16.
[0021]
As described above, various examples of the inclined portion of the stretchable portion have been described, but the shape of the inclined portion is not limited to the above example, and in summary, the longitudinal cross-section of each flexible waterstop member at the intersection is not linear, Any shape is acceptable as long as it is a shape that has some form of slack and allows the expansion and contraction of the expansion / contraction part at the intersection to follow the relative displacement between adjacent concrete structures. Alternatively, the number of recesses is not limited to one, and a plurality of recesses may be continuous.
[0022]
In this specification, “arch shape” is used to mean not only the arch shape of FIGS. 1 and 5 but also the reverse arch shape of FIG. The arch-shaped stretchable part is not limited to a single V-shape or U-shape, and may be formed into a plurality of wave shapes such as a V-shape or a U-shape. For example, like the embodiment shown in the perspective view of FIG. 11, which is a modification of the embodiment of FIG. 5, the arch-shaped stretchable part 50 may be formed in a shape in which two V-shaped shapes are continuous.
[0023]
【The invention's effect】
As described above, according to the present invention, the inclined portion that allows expansion and contraction of the expansion / contraction portion at the intersection of the first and second flexible water-stopping members follows the displacement between the adjacent concrete structures. Since the slanted portion expands and contracts following the displacement of the joint, the flexible waterstop member can be expanded and contracted regardless of the direction of the cross or T-shaped joint. The part can be fully expanded and contracted including the crossing part, and water stoppage can be maintained. In addition, the joint of the present invention can be manufactured regardless of the thickness of the flexible water-stopping member, and the joint can be restored to the original state when the joint is restored from the open state. Brief description of]
FIG. 1 is a perspective view showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line AA of FIG.
3 is a cross-sectional view taken along the line BB in FIG.
FIG. 4 is a perspective view showing a state in which 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 in FIG.
7 is a cross-sectional view taken along the line BB in 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 cruciform joint.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Ground stop joint 2 1st flexible water stop member 3 2nd flexible water stop member 4, 40, 50 Expansion-contraction part 5 Fixing part 6, 7, 8, 9 Concrete structure 10, 11, 12, 13 Joint 16 Crossing part 17, 20, 30, 32, 42 Inclined part

Claims (1)

A flexible waterproofing member made of rubber / synthetic resin and having an arch-shaped expansion / contraction part and fixed parts on both sides thereof, a first flexible waterproofing member extending linearly, and the first possible waterproofing member A second flexible water-stopping member extending so as to intersect with the anti-deflection water member, and arranging the stretchable portion so as to cover the joints between the adjacent concrete structures; In the joint water-stop joint of a concrete structure that fixes the fixing part to each concrete structure,
Following the displacement between adjacent concrete structures, an inclined portion inclined in a concave shape allowing the expansion / contraction of the expansion / contraction portion at the intersection where the first and second flexible water-stopping members intersect is formed at the intersection. A joint joint for waterproofing a concrete structure, characterized in that it is formed in an expandable part.

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