JP4911906B2 - Joints for structural joints - Google Patents

Description

  The present invention relates to a joint water-stopping joint for a structure, and is particularly suitable as a joint water-stopping joint having a cross shape or a T-shape for a concrete structure such as a floor plate of a reservoir.

  There is a joint part such as a floor part of a concrete structure such as a distribution pond, etc., in the case where it is necessary to stop the joint part of the structure, for example, the displacement of the joint part formed in a cross shape or a T-shape, for example. A joint water-stop joint is used to prevent leakage while allowing it.

As a joint water-stopping joint used for a cross joint part of a concrete structure, for example, as shown in FIG. 6, an arch-shaped flexible water-stopping member having a U-shaped (or V-shaped) cross-sectional shape is used. There is something.

  In this joint water-stopping joint, the flexible water-stopping member a is composed of a stretchable part b integrally formed in a cross shape and flat plate-like fixing parts c on both sides thereof. It arrange | positions so that the joint e between four adjacent concrete structures may be covered, and the fixing | fixed part c is fixed to each concrete structure with the anchor f.

  In the joint water-stopping joint using such a cross-shaped flexible water-stopping member, when the joint is opened due to an earthquake or the like, the arch-shaped expansion / contraction part b having a U-shaped cross section other than the intersection part d is expanded. By opening, it can extend following the displacement of the joint, but at the intersection d, the cross-sectional shape of the flexible water-stopping member is not a U-shaped arch, but is a straight line. It can only be displaced within the allowable elastic deformation range, and cannot follow the large opening of the joint.

  Then, the thing shown to patent document 1 is proposed as a joint water-stopping joint which can follow a large opening of a joint.

As shown in FIG. 7, this joint water-stopping joint is a first that linearly extends a flexible water-stopping member having a stretchable part 4 having an arched cross section and flat plate-like fixing parts 5 on both sides thereof. The flexible water blocking member 2 and the second flexible water blocking member 3 extending so as to intersect with the flexible water blocking member 2 are integrally formed, and at the intersection 6 of the first and second flexible water blocking members. It is configured by forming an inclined portion 7 that allows expansion and contraction, and the expansion and contraction portion is arranged so as to cover joints between a plurality of adjacent concrete structures, and the fixing portion 5 is fixed to each concrete structure and used. To do.
JP 2003-328454 A

  According to such a joint water-stop joint of Patent Document 1, regardless of the direction in which the joints such as a cross shape or a T-shape between adjacent concrete structures open in any direction, the stretchable part and the inclined part follow the joint. By deforming, it is possible to maintain a water-stop state and to return to an original state from an extended state.

  However, there is a limit to the range that can follow the displacement of the joint part even with this joint joint, and even if a larger joint part displacement occurs, it can follow with sufficient margin and easily return to the original state from the extended state. It is desired to develop joint waterproof joints for structures that can be used.

  The present invention has been made in view of the above demands, and when joints formed between structures cross each other, even if the joints open in any direction, they can follow with sufficient margin. It is possible to maintain a water stop by expanding and contracting, and to provide a joint joint for a structure that can be easily restored to its original shape even when the joint is displaced from an open state to a closed state. It is what.

  Therefore, as a result of intensive studies on the conventional joints, the range that can follow the displacement of the intersection is the range until the inclined part becomes flat, and there is a limit depending on the height of the stretchable part. The inventors have found that it is effective to provide a portion that can be further expanded and contracted in addition to the inclined portion, and have completed the present invention.

That is, in order to solve the above-mentioned problem, the joint joint water-stopping joint according to claim 1 of the present invention is made of a flexible material and has a stretchable portion covering the joint with an arch-shaped cross section and flat plates on both sides thereof. The flexible waterproofing members having a fixing portion to the structure are formed in a shape corresponding to the joint shape of the structure, while the flexible waterproofing members are crossed from the intersection center to the joint shape. Correspondingly, a cut portion is formed, and each side surface of the substantially pyramid corresponding to the joint shape is bent at the center so that it can be expanded and contracted. The arch-shaped expansion / contraction part is formed by watertightly forming an inclined part for expansion and contraction, wherein the one end edge part is continuous and the other end edge part forms an inclined surface that is continuous with the cut part. The substantially pyramid-shaped substantially pyramid portion for expansion and contraction and the tilt for expansion and contraction forming the inclined surface Is characterized in that is cooperate to allow expansion and contraction following the displacement of the.

According to the joint water-stopping joint of this structure, the flexible water-stopping has a stretchable part made of a flexible material and covering a joint having an arch-shaped cross section and fixing parts to the flat plate-like structures on both sides thereof. While forming the members in a shape corresponding to the joint shape of the structure, a cut portion is formed at the intersection of the flexible waterproofing members from the intersection center to the joint shape to correspond to the joint shape. The substantially pyramid portion for expansion and contraction, which is substantially pyramid-shaped and can be expanded and contracted by bending each side surface of the substantially pyramid, and the bottom edge and one end edge of the approximately pyramid portion for expansion and contraction are continuous, and the other end edge portion is The arch-shaped expansion / contraction section, the substantially pyramid-shaped expansion / contraction pyramid section, and the inclination To allow expansion and contraction by following the displacement by cooperating the slope for expansion and contraction forming the surface In addition to the inclined part, it can be expanded and contracted even in a substantially pyramid part, and even if the joint opens in any direction, the water stoppage can be maintained by following and expanding and deforming with sufficient margin. At the same time, even when the joint is displaced so as to be closed, the initial shape of the inclined portion and the substantially pyramid portion can be easily restored to the original shape.
In addition, the notch is formed from the center of the intersection to correspond to the joint shape, so that there is a sufficient margin regardless of the direction in which the joint opens with a joint shape such as a cross or T-shape. The water stop can be maintained by following and expanding and deforming.

Furthermore, joints waterproofing joint according to claim 2 Structure according to the present invention, in addition to the configuration of claim 1, wherein, while forming by tilting the telescoping inclined portion concavely said continuous to the inclined portion The substantially pyramid portion for expansion and contraction is formed in a convex shape.

  According to the joint waterproofing joint of this structure, the expansion / contraction inclined portion is inclined in a concave shape, and the expansion / contraction substantially pyramid portion that is continuous with the inclined portion is formed in a convex shape. In the initial state, the shape of the pyramid is folded so that the joints open in either direction while maintaining a compact shape. Even when the joint is displaced from the open state to the closed state, it can easily return to the original state.

According to a third aspect of the present invention, in addition to the structure according to the first or second aspect , the substantially pyramid portion for expansion and contraction is formed so as to be housed in the inclined portion for expansion and contraction. It is characterized by.

  According to the joint water-stopping joint of this structure, the substantially pyramidal portion for expansion and contraction is formed so that it can be accommodated in the inclined portion for expansion and contraction, and the joint is opened in any direction while having a compact shape in the initial state. However, it can be stretched and deformed by following it with a sufficient margin to maintain the water stoppage and easily return to the original state even when the joint is displaced from the open state to the closed state.

According to the joint water-stopping joint for a structure according to claim 1 of the present invention, the stretchable portion that covers the joint that is made of a flexible material and has an arch-shaped cross section, and fixing portions to the flat plate-like structures on both sides thereof Are formed in a shape corresponding to the joint shape of the structure, and a notch is formed at the intersection between the flexible water sealing members from the intersection center to the joint shape. A substantially pyramid-shaped substantially pyramid portion for expansion and contraction, which is formed and bendable at the center by bending each side surface of the substantially pyramid corresponding to the joint shape, and the bottom edge and one end edge of the substantially pyramid portion for expansion and contraction are continuous. The other end edge forms an inclined surface that is continuous with the cut portion, and is formed in a watertight manner with an expansion / contraction inclined portion that can be expanded and contracted, and the arch-shaped expansion / contraction portion and the substantially pyramid-shaped expansion / contraction Following the displacement by cooperating the substantially pyramid portion for use and the inclined portion for expansion and contraction forming the inclined surface Since it is allowed to shrink, in addition to the inclined part, it can be expanded and contracted even in a substantially pyramid part, and even if the joint opens in any direction, it can be stretched and deformed by following it with sufficient margin. Can be maintained, and even when the joint is displaced so as to be closed, the initial shape of the inclined portion and the substantially pyramid portion can be easily restored to the original shape.
In addition, since the notch was formed corresponding to the joint shape from the center of the intersection, even if the joint opens in any direction with a joint shape such as a cross shape or T-shape, it will follow with sufficient margin Can be stretched and deformed to maintain water stoppage.

Furthermore, according to the joint water-stopping joint for a structure according to claim 2 of the present invention, the expansion / contraction inclined portion is inclined in a concave shape, and the expansion / contraction substantially pyramid portion continuous to the inclined portion is formed in a convex shape. So, by folding the concave inclined part and the convex substantially pyramid part, even if the joint opens in any direction while keeping the compact shape in the initial state, it will follow and expand and contract with sufficient margin The water stoppage can be maintained, and even when the joint is displaced so as to be closed from the open state, it can be easily restored to the original state.

According to the joint water-stopping joint for a structure according to claim 3 of the present invention, the substantially pyramid portion for expansion and contraction is formed so as to be housed in the inclined portion for expansion and contraction, so that the initial deformation while increasing the expansion and contraction allowance. The state can be made compact.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 3 relate to an embodiment of a joint water-stop joint of a structure according to the present invention, FIG. 1 (a) is a schematic perspective view of an assembled state, and FIG. FIG. 3C is a schematic perspective view showing only the expansion and contraction substantially pyramid portion as viewed from below, FIG. 2 is a partially enlarged perspective view of the expansion and contraction inclined portion and the expansion and contraction approximately pyramid portion, and FIG. (B) is a central cross-sectional view of each of the stretchable part and the crossing part in a state where the joint is open.

  The joint water-stop joint 10 of this structure is used, for example, to stop water at a joint portion where the concrete structures C intersect in a cross shape, and is made of rubber / synthetic resin, which is a flexible material. A flexible waterproofing member 13 having a stretchable part 11 covering the projecting arch-shaped joint and a fixing part 12 to a flat concrete structure on both sides thereof is provided. The flexible waterproofing member 13 has a cross shape. A first flexible waterproofing member 13a extending linearly corresponding to the joint shape, and a second flexible waterproofing member 13b extending crossing the first flexible waterproofing member 13a in a cross shape. Are formed into a cross shape.

  In the joint waterproofing joint 10 of this structure, the intersection 14 of the flexible waterproofing member 13, that is, the intersection 14 of the first and second flexible waterproofing members 13 a and 13 b, from the center of the intersection 14. Corresponding to the joint shape, a cross-shaped cut portion 15 is formed along the top of the stretchable portion 11, and each corner is subjected to R processing 15a, and each end is punched with a circle 15b larger than the cut width. It is applied to prevent tearing due to deformation.

  An expansion / contraction inclined portion 16 is formed continuously at the edge of the cross-shaped cut portion 15, and as shown in FIG. 1B, four flexible members 16a bent substantially at right angles are formed into a cross shape. In this case, the expansion / contraction inclined portion 16 is formed as an inclined surface 16b inclined downward from the notch portion 15, and the adjacent expansion / contraction inclined portions 16 are connected to each other. The expansion / contraction inclined part 16 is formed in a concave shape so as to form a V-shaped valley.

  Further, in the joint water-stop joint 10 of this structure, a substantially pyramid portion for expansion and contraction 17 is formed inside the expansion and contraction inclined portion 16, and as shown in the inverted state in FIG. Are formed in a substantially quadrangular pyramid shape that is formed in a hollow substantially quadrangular pyramid shape corresponding to the above, and is formed by bending and bonding the flexible members 17a forming the four side surfaces at the center. The bottom edge 17b of 17 is bonded to the lower edge 16c of the inclined portion 16 for expansion and contraction, respectively, so that the joint joint waterproof joint 10 as a whole is watertight.

  Therefore, in the joint water-stop joint 10 of this structure, as shown in the central cross section in FIG. A concave expansion / contraction inclined portion 16 is formed by the inclined surface inclined in the direction, and the bottom edge of each side surface of the expansion / contraction substantially pyramid portion 17 is bonded to the lower end edge of the adjacent inclined surface, thereby forming the convex substantially expansion / contraction pyramid. Part 17 is configured.

  Thereby, in the joint water-stop joint 10 of this structure, in the direction orthogonal to each joint, it is substantially V-shaped formed with the inclined surface of the inclination part 16 for expansion / contraction which adjoins, and the side surface of the substantially pyramidal part 17 for expansion / contraction. Each of the valley portions is formed in four continuous states, and each of them follows the displacement of the joint between the concrete structures C and allows expansion and contraction.

  The joint water-stopping joint 10 having such a structure can be manufactured as follows. For example, the cross-shaped first and second flexible water-stopping members 13a and 13b shown in FIG. After integrally forming the pressing portion 16 and the expansion / contraction substantially pyramid portion 17 with a dedicated molding die for integrating the portion 16 and the expansion / contraction substantially pyramid portion 17 (press vulcanization). Then, the cross-shaped first and second flexible water-stop members 13a and 13b are extruded and placed in a mold, and these are attached and press vulcanized.

Next, operation | movement of the joint joint water-stopping joint 10 of the structure comprised in this way is demonstrated.
In the joint joint waterproofing joint 10 of this structure, each of the arch-shaped expansion / contraction parts 11 is arranged so as to cover the cross joints between the concrete structures C, and the flat fixing parts 12 are not shown. And fixed to each concrete structure C with anchor bolts.

In this state of use, when one or more of the concrete structures C expands and contracts due to an earthquake or the like, the corresponding expandable portions 11 of the first and second flexible waterproofing members 13a and 13b are displaced by the displacement of the concrete structure C. Following expansion and contraction, for example, as shown in FIG. 3B, the extended state can be expanded until the maximum expansion / contraction part 11 becomes substantially flat.

  In this case, at the crossing portion 14 of the joint joint 10 of the structure, the stretchable portion 11 can be expanded or contracted by the stretchable inclined portion 16 and the stretchable substantially pyramid portion 17. As with the other parts other than the crossing part 14, it can be expanded and contracted following the displacement of the concrete structure C. For example, as shown in FIG. The substantially pyramid portions 17 are elongated so that the valleys are expanded.

  Therefore, in the joint joint waterproofing joint 10 of this structure, the expansion / contraction part 11 as well as the expansion / contraction inclined part 16 and the expansion / contraction substantially pyramid part 17 of the intersection part 14 can expand and contract sufficiently as a whole. Can be maintained sufficiently.

  In addition, when the groove | channel C1 is formed in the joint between the concrete structures C, for example, as shown in FIG. The expansion / contraction part 11 of the flexible water blocking members 13a and 13b is accommodated in the groove C1 so as to form an arch shape with a U-shaped cross section, and the flat plate-like fixing part 12 is accommodated in the groove C1 of the concrete structure C. It is applied to the upper surface and fixed to each concrete structure C with anchor bolts via a presser plate.

  Even with the joint water-stopping joint 10 of the structure with the front and back reversed, when one or more of the concrete structures C are expanded and contracted due to an earthquake or the like, the expansion portion 11 as well as the intersecting portion is the same as described above. The 14 inclined portions 16 for expansion and contraction and the substantially pyramidal portion 17 for expansion and contraction can be expanded and contracted sufficiently as a whole, and the water-stopping property can be sufficiently maintained.

  As described above, the “arch shape” of the expansion / contraction portion 11 of the joint joint water-stopping joint of this structure may be either an inverted U shape or a U shape, and is not limited to the U shape, but is a V shape. It may be configured in other shapes such as a shape, and may be configured in a wave shape by providing a plurality of shapes such as a V shape or a U shape without being limited to one.

  For example, in the joint joint waterproofing joint 10A of the structure, as shown in FIG. 5, the arch-shaped expansion / contraction part 11A is formed in a wave shape in which two substantially U shapes are continuous, and the top part of the expansion / contraction part 11A is a valley part. Therefore, the expansion / contraction inclined part 16 and the expansion / contraction substantially pyramid part 17 of the crossing part 14 are provided in an inverted state as in the case of FIG.

  In the joint joint waterproofing joint 10A of the structure configured as described above, a large expansion / contraction deformation allowance can be secured while suppressing the arched height of the expansion / contraction part 11 to be low, and the concrete structure C in the initial state can be secured. It is also possible to deal with cases where the joints are wide.

  In the above-described embodiment, the case where the joint shape of the concrete structure is a cross shape has been described as an example. However, the shape is not limited to this, and a T-shaped joint shape may be used. In addition to providing an elongated cut-out part and a continuous inclined part for expansion and contraction, the substantially pyramid part for expansion and contraction is formed into a substantially triangular pyramid shape, and a large number of joint shapes are formed radially from the joint center. In addition to providing a polygonal cut-in portion and an expansion / contraction inclined portion corresponding thereto, a corresponding polygonal expansion / contraction substantially pyramid portion may be provided.

  Moreover, in the said embodiment, although the case where the joint of a concrete structure was located on a plane was demonstrated to the example, it can also be used for the joint part arrange | positioned in three dimensions, such as a bottom part and a side surface following this.

1 is a schematic perspective view of an assembled state, (b) is a schematic perspective view showing only an inclining part for expansion and contraction, and (c) is for expansion and contraction. It is a schematic perspective view which shows only a substantially pyramid part seeing from the bottom. It is a partial expansion perspective view of the inclination part for expansion and contraction, and the substantially pyramid part for expansion and contraction concerning one embodiment of the joint waterproofing joint of the structure of this invention. According to one embodiment of the joint water-stop joint of the structure of the present invention, (a) is a central cross-sectional view of the attached state, (b) is a central cross-sectional view of each of the stretchable part and the intersecting part in the state where the joint is open is there. It is a schematic perspective view of the assembly state concerning other embodiment of the joint waterproofing joint of the structure of this invention. It is a schematic perspective view of the assembly state concerning other one Embodiment of the joint waterproofing joint of the structure of this invention. It is a schematic perspective view of the joint waterproofing joint of the conventional structure. It is the schematic perspective view and AA sectional drawing of the joint waterproofing joint of the conventional structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 10A Structure joint water-stop joint 11 Expansion-contraction part 12 Fixing part 13 Flexible water-proof member 13a, 13b 1st, 2nd flexible water-stop member 14 Crossing part 15 Notch part 15a R process 15b Punching process 16 Telescopic inclined portion 16a Flexible member 16b Inclined surface 16c Lower end edge 17 Telescopic substantially pyramid portion 17a Flexible member 17b Lower end edge C Concrete structure C1 Groove

Claims (3)

Flexible water-proof members having a stretchable portion made of a flexible material and covering a joint having an arch-shaped cross section and fixing portions to flat plate structures on both sides thereof correspond to the joint shape of the structure. While forming into a shape, a cut portion is formed at the intersection of these water-stopping members from the intersection center corresponding to the joint shape, and each side of the substantially pyramid corresponding to the joint shape is bent at the center to expand and contract A substantially pyramid portion for expansion and contraction having a substantially pyramid shape made possible, and an inclined surface in which the bottom edge and one end edge portion of the substantially pyramid portion for expansion and contraction are continuous and the other end edge portion is continuous with the cut portion. It is formed in a watertight manner with an expansion / contraction inclined part that can be expanded and contracted,
The structure is characterized in that the arch-shaped expansion / contraction part, the substantially pyramid-shaped expansion / contraction pyramid part, and the expansion / contraction inclination part forming the inclined surface cooperate to follow displacement and allow expansion / contraction. Joint water joint. 2. The joint joint waterproofing structure for a structure according to claim 1, wherein the expansion / contraction inclined part is formed in a concave shape, and the expansion / contraction substantially pyramid part continuing to the inclined part is formed in a convex shape. . The joint joint waterproofing structure for a structure according to claim 1 or 2 , wherein the expansion and contraction substantially pyramid portion is formed so as to be housed in the expansion and contraction inclined portion.

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