JP2006233632A - Flexible cut-off joint and construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible cut-off joint and its construction method by which preparation work before placing concrete upon construction of a structure by placing concrete can be carried out easily and in a short time. <P>SOLUTION: A fixing groove part 16 is formed in advance in one side of a joint part 14 of concrete structural bodies 12, 13 by die forming, and an insertion fixing part 21 of the joint 20 is inserted and fixed by means of bonding so that the preparation work before placing can be carried out easily and in a short time. A slit part 21c is formed in the insertion fixing part 21 in the intermediate part between the outside and inside, and metal plates 21b being plate-like bodies are provided on the inner and outer faces, by which insertion into the fixing groove part 16 can be carried out smoothly and a bonding strength is secured. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a flexible waterproof joint and a method for constructing the flexible waterproof joint, and the waterproof and relative of a joint part of a concrete structure such as a water channel, a water treatment facility, a marine revetment, a tunnel, and a common groove constructed by handing over concrete. The preparatory work in the construction of the flexible waterproof joint that enables the displacement can be simplified.

  The joints of wall parts such as waterways, water tanks, or underground gutters built in the ground such as joint grooves, which are concrete structures constructed by passing concrete over, stop both inside and outside and the concrete structures on both sides It is necessary to allow expansion and contraction of the wall portion due to the temperature change of the water, and a flexible water stop joint such as a water stop plate is interposed.

  As a flexible water-stopping joint interposed in the joint portion of such a concrete structure, for example, there is a water-stop plate 1 disclosed in Patent Document 1, and as shown in FIG. A plurality of locking ridges 3 are provided at both ends, and the locking ridges 3 at the respective ends are embedded and fixed in the concrete to be placed.

Moreover, as a flexible waterproof joint for concrete structures such as joint grooves, for example, there is a flexible rubber joint 6 disclosed in Patent Document 2, and as shown in FIG. The curved portion 7 and a pair of flange portions 8 that are integrally connected between the open ends of the curved portion 7 and are fixed in a substantially V-shaped cross section with the curved portion 7 interposed therebetween are configured. As shown in (b), the anchor bolt 9 attached to the flange portion 8 is buried and fixed in the concrete to be cast.
JP-A-9-105166 JP 2002-167789 A

  However, in such flexible water-stopping members 1 and 5 of Patent Document 1 and Patent Document 2, it is necessary to hold the flexible water-stopping members 1 and 5 in a predetermined position before placing concrete. In the case of the water stop plate 1 of the literature 1, as shown in FIG. 10 (b), the preceding protruding protrusion 3 on the concrete side is suspended from the reinforcing reinforcing bar 4, and the concrete is later It is necessary to hold the locking convex portion 3 embedded in the metal plate with a holding material 5 such as a plate material, so that preparation work before placing concrete is difficult, and there is a problem that it takes time and effort.

  Moreover, in the flexible rubber joint 6 of patent document 2, as shown in FIG.11 (b), the anchor bolt 9 and the reinforcing bar 4 are welded via the joint 10 in the state which attached the anchor bolt 9 to the flange part 8. FIG. At the same time, the angle holding member 11 is attached to the outside of the pair of flange portions 8 so that the angle can be maintained. In this case as well, preparation work before placing the concrete is difficult, and there is a problem that it takes time and effort. .

  The present invention has been made in view of the problems of the prior art, and can flexibly perform a preparatory work before placing concrete in a short time in the case of constructing a structure by casting concrete. It is an object of the present invention to provide a waterproof joint and a construction method thereof.

  In order to solve the above-mentioned problems, a flexible waterproof joint according to claim 1 of the present invention is provided in a joint part of a concrete structure constructed by piercing concrete, and is used for water stop inside and outside and relative displacement of the joint part. A flexible water-stop joint that can be inserted into a fixing groove provided on one of the joint portions of the concrete structure, and the other of the joint portions of the concrete structure. A cast-and-fixed portion that is buried and fixed by the placement of the guide, and a telescopic portion that is connected to the insertion-fixed portion at one end and is connected to the other end to allow water stop and relative displacement The insertion fixing part has a slit part in the inner and outer intermediate parts, and a plate-like body bonded to the fixing groove part is attached to each of the inner and outer surfaces, and the placement fixing part increases the fixing strength. Has protrusion Be Te is characterized in.

  According to this flexible waterproof joint, one of the joint portions of the concrete structure is molded with a fixing groove portion without being embedded and fixed by placing concrete, and an insertion fixing portion at one end portion of the joint is formed. It is inserted into the fixing groove and bonded and fixed, so that the preparatory work before placing can be performed easily and in a short time. In addition to providing slits in the inner and outer intermediate parts of the insertion and fixing part, it is possible to smoothly insert into the fixing groove part with a plate-like body such as a metal plate or hard resin plate provided on the inner and outer surfaces, ensuring adhesive strength I can do it.

  According to a second aspect of the present invention, in addition to the structure of the first aspect, the flexible waterproof joint is provided with an adhesive injection path in communication with the slit portion of the insertion fixing portion. To do.

  According to this flexible waterproof joint, the adhesive can be injected from the adhesive injection path provided in communication with the slit portion of the insertion fixing portion and adhered to the fixing groove portion, so that the adhesive can be easily filled. ing.

  Furthermore, the flexible waterproof joint according to claim 3 of the present invention is characterized in that, in addition to the configuration according to claim 1, an adhesive is sandwiched between the slit portions of the insertion fixing portion. .

  According to this flexible waterproof joint, it is possible to extrude the adhesive by inserting it into the fixing groove portion by sandwiching the adhesive in advance in the slit portion of the insertion fixing portion, and the bonding work on site is further simplified. To be able to.

  According to a fourth aspect of the present invention, in addition to the structure according to any one of the first to third aspects, the flexible waterproof joint is in contact with the end surface of the joint portion at the proximal end portion of the insertion fixing portion. It is characterized in that an abutting adhesive part to be adhered is provided.

  According to this flexible waterproof joint, the contact bonding portion provided at the base end portion of the insertion fixing portion is contacted and bonded to the end surface of the joint portion, so that it can be fixed more firmly.

  Furthermore, in addition to the structure in any one of Claims 1-4, the flexible waterproof joint of Claim 5 of this invention provided that the said plate-shaped body was protruded from the said insertion fixing | fixed part. It is a feature.

  According to this flexible waterproof joint, by projecting a plate-like body such as a metal plate or a hard resin plate from the insertion fixing portion, the plate-like body is protruded into the fixing groove which is an adhesive filling space. The adhesive strength is improved.

  Moreover, in addition to the structure in any one of Claims 1-5, the flexible waterproof joint of Claim 6 of this invention is a curve which the said expansion-contraction part curved to the plate-shaped expansion-contraction part or the said one end part side. It is comprised by the plate-shaped expansion-contraction part provided with a part, It is characterized by the above-mentioned.

  According to this flexible waterproof joint, the expansion / contraction part is composed of a plate-shaped expansion / contraction part or a plate-shaped expansion / contraction part having a curved portion curved toward one end, and is placed on the end surface of the concrete placed first (outside For this purpose, the plate-shaped expansion / contraction part is applied directly through the joint material, so that water stop and relative displacement are possible.

  Furthermore, the flexible water-stop joint according to claim 7 of the present invention is characterized in that, in addition to the structure according to any one of claims 1 to 5, the stretchable part is formed in a hollow shape. It is.

  According to this flexible waterproof joint, a hollow shape is formed in the expansion / contraction part, and preparatory work before placing concrete is ensured while ensuring the same waterproof performance and relative displacement as the conventional waterproof plate. It is easy and can be done in a short time.

  Moreover, in addition to the structure in any one of Claims 1-7, as for the flexible water-stopping joint of Claim 8 of this invention, the said placement fixing | fixed part is the other of the said joint part of the said concrete structure. While having an end surface fixing portion and a side surface seal portion bonded to the end surface and the side surface, a butyl sheet is provided inside the side surface seal portion.

  According to this flexible water-stopping joint, the placement fixing part is provided with an end face fixing part and a side seal part bonded to the other end face and side face of the joint part of the concrete structure, and butyl is provided inside the side seal part. It is configured by providing a sheet, and the end face fixing part is integrated with the end face of concrete to be placed later, and the side seal part and the butyl sheet inside thereof are integrated on the side face, so that the anchoring part of the placement fixing part is fixed. To ensure water stopping and relative displacement.

  Moreover, the construction method of the flexible water-stopping joint according to claim 9 of the present invention enables the water stop inside and outside the joint portion of the concrete structure constructed by passing concrete and the relative displacement of the joint portion. In constructing a flexible waterproof joint, a fixing groove is formed on one of the joints of the concrete structure using a groove mold, and then the fixing groove is provided with any one of claims 1 to 8. The insertion fixing portion of the flexible waterproof joint described in the above is inserted and bonded, the abutting adhesive portion is bonded, and then an inner joint material is partially provided on an end surface of the joint portion at least inside the flexible waterproof joint After bonding, the other of the joint portions of the concrete structure is placed and constructed so that the placement fixing portion is buried and fixed.

  According to the construction method of the flexible water-stopping joint, when the flexible water-stopping joint is constructed, the fixing groove portion is formed using the groove mold in the joint portion of the concrete structure to be placed first, By inserting and bonding the insertion and fixing part of the flexible waterproof joint into this fixing groove part, one side can be constructed by bonding the contact adhesive part inside and outside the end face of the joint part outside the fixing groove part. Then, after partially bonding the inner joint material to the end face of the joint portion at least inside the flexible waterproof joint, the placement fixing portion is embedded and fixed in the other joint portion of the concrete structure to be placed later. Construction on the joint can be performed, which is greatly simplified compared with the preparatory work prior to placement so far, and preparation can be completed in a short time.

  Furthermore, the construction method of the flexible water-stopping joint according to claim 10 of the present invention, in addition to the configuration according to claim 9, inserts and bonds the insertion fixing portion of the flexible water-stopping joint into the fixing groove portion. After that, the stretchable part of the flexible waterproof joint is partly bonded to the joint part outside the insertion fixing part, or partly bonded to the outer joint material bonded to the joint part outside the insertion fixing part. At the same time, the center joint material thicker than the joint spacing of the joint portion is partially adhered to the inside of the insertion fixing portion.

  According to the construction method of the flexible waterproof joint, after inserting and bonding the insertion fixing portion of the flexible waterproof joint to the fixing groove, the expansion and contraction portion of the flexible waterproof joint is inserted into the insertion fixing portion. A center that is partially bonded to the joint portion outside the joint, or partially bonded to an outer joint material bonded to the joint portion outside the insertion fixing portion, and thicker than the joint interval of the joint portion inside the insertion fixing portion The joint material is applied with partial bonding, and the joint material for the outside and the joint material for the center are interposed so as to prevent water damage and damage to the joint due to relative displacement.

  According to the flexible waterproof joint according to claim 1 of the present invention, a fixing groove portion is molded in one of the joint portions of the concrete structure without being embedded and fixed by placing concrete, Since the insertion fixing part formed at one end is inserted into the fixing groove and bonded and fixed, it only needs to be inserted into the fixing groove after placing, and the preparation work before placing is greatly simplified and shortened. Can be constructed. And while providing a slit part in the inner and outer intermediate part of the insertion fixing part and providing a plate-like body such as a metal plate and a hard resin plate on the inner and outer surfaces, it can be smoothly inserted into the fixing groove part, Adhesive strength can be ensured by interposing a plate-like body such as a metal plate.

  Further, according to the flexible waterproof joint according to claim 2 of the present invention, since the adhesive injection path is provided in communication with the slit portion of the insertion fixing section, the adhesive is injected and fixed from the adhesive injection path. It can be adhered to the groove portion and can be easily filled with the adhesive.

  Furthermore, according to the flexible waterproof joint according to claim 3 of the present invention, since the adhesive is previously sandwiched in the slit portion of the insertion fixing portion, the adhesive sandwiched by the insertion into the fixing groove portion Can be pushed out, and on-site bonding can be performed more easily.

  Further, according to the flexible waterproof joint according to claim 4 of the present invention, the contact adhesive portion provided at the base end portion of the insertion fixing portion is contacted and bonded to the end surface of the joint portion. The part can be fixed more firmly.

  Furthermore, according to the flexible waterproof joint according to claim 5 of the present invention, since the plate-like body such as the metal plate or the hard resin plate is protruded from the insertion fixing portion, the plate-like body such as the metal plate is bonded to the adhesive. The adhesive strength can be improved by projecting into the fixing groove which is the filling space.

  According to the flexible waterproof joint of claim 6 of the present invention, the expansion / contraction part is constituted by the plate-type expansion / contraction part or the plate-type expansion / contraction part provided with the curved portion curved toward the one end side. A plate-like stretchable part can be applied to the end face of the provided concrete via a joint material or directly, and water stop and relative displacement can be made possible.

  Further, according to the flexible waterproof joint according to claim 7 of the present invention, since the expansion / contraction part is formed with a hollow shape, the same waterproof performance and relative displacement as the conventional waterproofing plate can be realized. However, preparatory work before placing concrete can be performed easily and in a short time.

  Moreover, according to the flexible water-stop joint according to claim 8 of the present invention, the placement fixing portion includes the end surface fixing portion and the side surface sealing portion bonded to the other end surface and the side surface of the joint portion of the concrete structure. Since the butyl sheet is provided inside the side seal portion, the end face fixing portion can be integrated with the end surface of concrete to be placed later, and the side seal portion and the butyl sheet inside thereof can be integrated with the side surface. In addition, the embedding and fixing of the placement fixing portion can be strengthened, and water stopping and relative displacement can be achieved.

  Moreover, according to the construction method of the flexible waterproof joint according to claim 9 of the present invention, when constructing the flexible waterproof joint, the groove mold is used for the joint portion of the concrete structure to be placed first. A fixing groove portion is formed, and an insertion fixing portion of a flexible waterproof joint is inserted into and bonded to the fixing groove portion, and an abutting adhesive portion is bonded to the inside and outside of the end surface of the joint portion outside the fixing groove portion. As a result, the construction on one side can be done easily and in a short time, and then the inner joint material is partially bonded to the end face of the joint at least on the inner side of the flexible waterproof joint, and then the concrete structure is placed later. Since the placement fixing part is embedded and fixed to the other joint part, the construction to the other joint part can be easily performed, and it is greatly simplified compared to the preparatory work prior to placement so far, and in a short time. You can complete the preparation.

  Furthermore, according to the construction method of the flexible waterproof joint according to claim 10 of the present invention, after inserting and bonding the insertion fixing portion of the flexible waterproof joint into the fixing groove, the flexible waterproof joint The expansion / contraction portion is partially bonded to the joint portion outside the insertion fixing portion, or partially bonded to the outer joint material bonded to the joint portion outside the insertion fixing portion, and inside the insertion fixing portion. Since the joint material for the center that is thicker than the joint space of the joint part is partially bonded, the outer joint material and the joint material for the center are interposed, so that a space for improving water stoppage and displacement Cushioning can prevent joint damage due to relative displacement.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 3 relate to an embodiment of the flexible water-stop joint of the present invention, FIG. 1 is a schematic perspective view of a concrete structure to which the flexible water-stop joint of the present invention is applied, and FIG. FIG. 3 is a partial cross-sectional view of the flexible water-stopping joint, and FIG. 3 is a cross-sectional view of the mounted state after the construction of the water-stopping joint.

  The flexible water-stop joint 20 can stop the joint portions 14 of the concrete structures 12 and 13 constructed by passing over the concrete, and can relatively displace the concrete structures 12 and 13 on both sides of the joint portion 14. It is what.

  A joint groove, which is an example of a concrete structure, is formed by connecting boxes 12 and 13 having a rectangular cross-sectional shape and a predetermined length by a joint portion 14. Thus, it is constructed by connecting the joint portion 14 every predetermined length (every box), and after completion, it is buried in the ground at a predetermined depth.

  The flexible waterproof joint 20 provided in the joint part 14 of the concrete structures 12 and 13 is not fixed to the preceding concrete structure 12 to be placed before being buried and fixed by placing concrete. The groove portion 16 is molded, and after the preceding concrete structure 12 is placed, the fixing groove portion 16 is used to attach it with an adhesive. Similarly, it is attached by being buried and fixed by placing concrete.

  The flexible waterproof joint 20 includes an insertion fixing portion 21 inserted and fixed in the fixing groove 16 of the preceding concrete structure 12, and a placement fixing portion 22 embedded and fixed by placing the subsequent concrete structure 13. One end portion is connected via the insertion fixing portion 21 and the constricted portion 23, and the other end portion is connected to the placement fixing portion 22, and is provided with an expansion / contraction portion 24 that enables water stop and relative displacement. It is integrally formed in the cross-sectional direction by a flexible material such as rubber or synthetic resin, and in the longitudinal direction, the divided part is formed in a ring or the like in the factory or on the site according to the shape of the joint part 14. The

  It is also possible to directly connect the insertion fixing part 21 and the expansion / contraction part 24 and omit the constricted part 23.

  In the flexible waterproof joint 20, the insertion fixing portion 21 has a shape corresponding to the shape of the fixing groove portion 16 of the joint portion 14 as shown in FIG. Since the cross section has a trapezoidal shape with a narrow front, the cross section of the insertion fixing portion 21 also has a narrow trapezoidal shape with a narrow front, and the abutting adhesive portion is brought into contact with the opening of the fixing groove 16 at the base end portion. 21a is formed to protrude outward, and is inserted and fixed when the contact bonding portion 21a is applied to the end surface 14a of the joint portion 14 (which is also the end surface of the concrete structure 12) which is the opening surface of the fixing groove portion 16. A gap is formed between the tip of the portion 21 and the bottom of the fixing groove 16.

  Then, a metal plate 21b such as a stainless steel plate is bonded to the insertion fixing portion 21 as a plate-like body on both sides of the trapezoidal side surface disposed on the inner and outer surfaces of the joint portion 14 by vulcanization bonding or the like, respectively. The tip portion protrudes forward from the flexible material and is bent so as to be tapered inwardly.

  The metal plate 21b has a thickness of, for example, 1 mm, thereby facilitating the insertion by reducing friction during insertion into the fixing groove 16 compared to a case of using only a flexible material such as rubber. By interposing the plate 21b, the adhesive strength is improved as compared with the case of directly bonding the flexible material and the concrete.

  That is, the flexible material and the metal plate 21b can be firmly bonded by vulcanization bonding or the like, and the metal plate 21b and the concrete of the fixing groove 16 can also be firmly bonded with an adhesive, so that the adhesive strength can be increased. Furthermore, the adhesive strength is further increased by protruding the tip of the metal plate 21b from the flexible material.

  Therefore, the plate-like body is not limited to a metal plate, and may have a shape retention and strength of the insertion fixing portion 21 and adhesiveness with concrete, and a hard resin plate or the like can be used.

  Further, the insertion fixing portion 21 is provided with a slit portion 21c having a front opening at an intermediate portion (an intermediate portion in the inner and outer directions of the joint portion 14). The slit portion 21c includes a parallel portion from the front end and a rear end portion. The cross section has a circular shape with a circular shape.

  This slit portion 21c increases the elastic deformation allowance of the insertion fixing portion 21 to facilitate insertion into the fixing groove portion 16, and improves adhesive strength by filling with an adhesive.

  In addition, an adhesive injection path 25 that communicates with the slit portion 21c and penetrates from the expansion / contraction section 24 is provided. The adhesive injection path 25 is formed in the longitudinal direction at a predetermined interval, for example, a pitch of 300 to 500 mm. In the construction, an adhesive is injected from the outside so that the insertion fixing portion 21 can be bonded and fixed to the fixing groove portion 16 of the joint portion 14.

  Note that, as in the insertion fixing portion 21A shown in FIG. 3B, an adhesive may be sandwiched in advance and may be pushed out by insertion into the fixing groove portion 15. In this case, the insertion fixing portion 21A The shape is formed so that the parallel portion of the slit portion 21c in the insertion fixing portion 21 is expanded and formed into a triangular shape so that the inner and outer metal plates 21b are parallel to each other, and the triangular slit portion is formed as an adhesive sandwiching portion 21d. By doing so, an adhesive agent can be previously inserted.

  The sandwiching of the adhesive into the sandwiching portion 21d may be performed at any time as long as it is sandwiched at the time of construction such as being performed on site before construction.

  For example, an epoxy resin adhesive is used for bonding the insertion fixing portions 21 and 21A.

  Next, the placement fixing portion 22 of the flexible waterproof joint 20 embedded and fixed by the placement of the subsequent concrete structure 13 to be placed later increases the fixing strength and increases the pulling strength at the time of elongation deformation. For example, in this flexible waterproof joint 20, the cross section applied to the outer peripheral portion of the concrete structure 13 and the end surface 14 b of the joint portion 14 (also the end surface of the concrete structure 13) is provided. A side seal portion 22b and an end surface fixing portion 22c formed in an L shape are provided, and a protruding portion 22a is formed so as to protrude inside the tip end portion of the side seal portion 22b.

  As shown in FIG. 2 in an enlarged manner, the protrusion 22a is formed with an air vent hole 22e penetrating in the axial direction of the joint portion 14 for venting the concrete, for example, a hole having a diameter of about 5 mm. Are formed at a predetermined pitch.

  Further, the placement fixing portion 22 is provided with a butyl sheet 22d on the inner side of the side seal portion 22b, and is adhered to the side seal portion 22b with its adhesive force, and the concrete structure 13 and the placement fixing portion 22 The water stoppage is ensured.

  In the flexible waterproof joint 20, one end portion of the expansion / contraction portion 24 is continuously formed so as to extend the end surface fixing portion 22 c of the placement fixing portion 22, and a plate-like expansion / contraction portion 24 a having a constant thickness is integrally formed. The insertion / fixing portion 21 is arranged at the other end of the expansion / contraction portion 24 so as to protrude forward perpendicularly to the end of the plate-like expansion / contraction portion 24a, and the inner and outer surfaces are recessed and the thin constricted portion 23 is interposed therebetween. Are integrally formed.

  By providing the insertion fixing part 21 and the expansion / contraction part 24 via the constricted part 23, when the plate-like expansion / contraction part 24a of the expansion / contraction part 24 is deformed, the deformation resistance is reduced, the deformation is facilitated, and the insertion fixing part Do not apply a large pulling force to 21.

  The construction method to the joint part 14 of the concrete structures 12 and 13 of the flexible waterproof joint 20 comprised in this way is demonstrated with FIG. 4 and FIG.

  First, in order to construct the preceding concrete structure 12 on which concrete is placed first, the mold is leveled and assembled on the concrete 15, and the groove mold for the fixing groove 16 is formed on the end mold forming the end surface 14 a of the joint 14. After the frame is set, the preceding concrete is placed.

  Then, after curing, the mold is removed, the fixing groove 16 is formed on the end surface 14a of the joint portion 14, and the inside is cleaned (see FIG. 4A).

  Next, as shown in FIG. 4B, an outer joint material 26 such as rubber or sponge is bonded to the outer side of the fixing groove 16 of the end surface 14a of the joint portion 14 which is the end surface of the preceding concrete structure 12. Glue and fix with agent. The outer joint material 26 reduces deformation resistance and prevents damage when the flexible waterproof joint 20 is compressed and deformed.

  After that, the insertion fixing portion 21 of the flexible waterproof joint 20 is inserted into the fixing groove portion 16, and the end surface fixing portion 22c of the placement fixing portion 22 and the plate-like extension portion 24a of the extension portion 24 continuous thereto are used for the outside. The joint material 26 is held in a predetermined state by partial adhesion that adheres to the joint material 26 in the longitudinal direction.

  Further, an adhesive is injected from an adhesive injection path 25 communicating with the slit portion 21 c of the insertion fixing portion 21.

  In addition, when using the thing provided with the insertion fixing | fixed part 21A as the flexible water-stopping joint 20, it inserts the insertion fixing | fixed part 21A in the fixing groove part 16, and extrudes the adhesive agent previously clamped by the clamping part 21d. To do.

  Thereby, the insertion fixing parts 21 and 21A of the flexible waterproof joint 20 can be bonded and fixed to the fixing groove part 16 of the preceding concrete structure 12 which is one of the joint parts 14, and before the conventional preceding concrete is placed. Compared with a preparatory work such as suspending a fixing portion embedded in a reinforcing bar or the like, the fixing groove portion 16 only needs to be molded, and the preparatory work can be performed easily and in a short time.

  Then, a central joint material 27 thicker than the thickness of the expansion / contraction part 24 and a thin inner joint material 28 corresponding to the joint spacing are partially bonded to the end face 14a of the joint part 14 inside the flexible waterproof joint 20, respectively. Can be held. By providing the joint material 27 for the center, the flexible waterproof joint 20 is elongated when the distance between the joint portions 14 becomes narrower and returns to the original state from the state where the distance between the joint portions 14 is expanded and deformed. The expansion / contraction part 24a in a state of being in contact with the concrete surface is ensured and a deformation space is prevented to function as a cushioning material. Further, the inner joint material 28 is used as a cushion material when the concrete of the joint portion 14 is expanded.

  Furthermore, after assembling the formwork necessary for the construction of the subsequent concrete structure 13, the subsequent concrete is placed. During the placement of the concrete, even if air accumulates inside the protrusion 22a, it can be discharged to the outside through the air vent 22e.

  Then, the installation construction of the flexible waterproof joint 20 to the joint part 14 is completed by removing the mold (see FIG. 5A).

  In addition, a waterproof sheet 29 is attached to the side surface and the top surface except the bottom of the joint portion 14 to prevent intrusion of rainwater or the like. This waterproof sheet 29 is backfilled with earth and sand when it is used as an underground structure after the connection of the joint parts 14 of the concrete structures 12 and 13 is completed. At this time, the earth and sand penetrates into the joint parts 14. However, it is used to prevent the possibility of problems such as an external force being applied to the flexible waterproof joint 20.

  According to such a flexible waterproof joint 20 and its construction method, for example, when the relative displacement is performed so that the distance between the joint portions 14 of the concrete structures 12 and 13 is increased, as shown in FIG. The state where the insertion fixing portion 21 of the flexible waterproof joint 20 is bonded and fixed to the fixing groove portion 16 of the preceding concrete structure 12 and the placement fixing portion 22 is fixed to the subsequent concrete structure 13 by placing. Thus, the plate-like stretchable portion 24a of the stretchable portion 24 is deformed from the rear of the constricted portion 23, and the water stoppage can be maintained in a state in which relative displacement is allowed.

  At the time of this relative displacement, the constricted portion 23 of the flexible waterproof joint 20 does not affect the deformation of the expansion / contraction portion 24 directly on the insertion fixing portion 21, thereby reducing the pull-out force and the deformation allowance of the expansion / contraction portion 24. Can be increased.

  Furthermore, according to such a flexible waterproof joint 20 and its construction method, the flexible waterproof joint 20 is attached to the preceding concrete structure 12 by being inserted into the fixing groove 16 after the preceding concrete is placed. Compared with the case of preparing to hang on a reinforcing bar or the like before placing, preparation work can be greatly reduced and construction can be performed easily and in a short time.

  Since the metal plate 21b is provided as a plate-like body in the insertion fixing portion 21 of the flexible waterproof joint 20, the flexible material is more flexible than the case where the flexible material is directly bonded and fixed to the fixing groove portion 16. In addition, the adhesive strength with the fixing groove 16 can be increased, and the insertion fixing portion 21 can be firmly fixed to increase the pull-out strength.

  Furthermore, the placement fixing part 22 of the flexible waterproof joint 20 can be held by, for example, partially adhering to the preceding concrete structure 12, and preparation before placing the subsequent concrete is performed in a short time. Can do.

  Next, another embodiment of the flexible waterproof joint according to the present invention will be described with reference to FIG. 6 and FIG. 7. Description is omitted.

  As shown in FIGS. 6 (a) and 6 (b), this flexible waterproof joint 30 has an insertion fixing portion 21 and a driving fixing portion 22 having the same configuration as the flexible waterproof joint 20 already described. The shape of the stretchable part 31 is different.

  The expansion / contraction part 31 of the flexible waterproof joint 30 includes a plate-like expansion / contraction part 31 a and a curved part 31 b that is curved so as to protrude toward the constriction part 23, which is one end side. A plate-shaped expansion / contraction part 31a is arranged parallel to the end surfaces 14a, 14b of the joint part 14 at the constricted part 23 at the end, and is curved so as to protrude toward the constricted part 23 side. The end face fixing portion 22c of the placement fixing portion 22 parallel to the end faces 14a and 14b of the joint portion 14 is continuous through the bending portion 31b in a state where the insertion fixing portion 21 is inserted and fixed in the fixing groove portion 16. The outer plate-shaped expansion / contraction part 31 a and the end face fixing part 22 c of the placement fixing part 22 are in contact with the end face 14 a of the joint part 14 that is the end face of the preceding concrete 12.

  The other configuration is the same as that of the flexible waterproofing member 20 already described, and an insertion fixing portion 21A that sandwiches the adhesive in the clamping portion 21d in advance may be provided as the insertion fixing portion.

  In addition, as shown in FIG. 7A, the construction method can be constructed in the same manner as the flexible waterproof joint described above, except that the outer joint material is omitted.

  According to such a flexible waterproof joint 30, the plate-like stretchable part 31a is partially bonded directly to the end surface 14a of the joint part 14 which is the preceding concrete structure 12 without using the outer joint material 26 at the time of construction. What is necessary is just to hold | maintain, and construction can be simplified further and it can be constructed in a short time.

  Moreover, since the bending part 31b is provided in the expansion-contraction part 31, as shown in FIG.7 (b), a deformation allowance can be enlarged and the absorption capability of the relative displacement similar to the case where the joint material for outside is used is shown. Can be secured.

  Next, another embodiment in which the flexible water-stopping joint of the present invention is applied to a water-stopping plate will be described with reference to FIG. 8 and FIG. The same symbols are used, and duplicate descriptions are omitted.

  In the flexible waterproof joints 40 and 40A constituted by this waterproofing plate, both ends are attached to the central portion of the wall as a concrete structure to stop water, and insertion of a type in which an adhesive is sandwiched between the sandwiching portions 21d The fixing portion 21A, the placement fixing portion 22 fixed to the following concrete by placement, and the stretchable portion 41 including the hollow portion 41a are arranged in a substantially straight line.

  That is, in the flexible waterproof joints 40 and 40A, since the expansion / contraction part 41 is arranged in a straight line, an adhesive injection path cannot be formed and an adhesive cannot be inserted later. An adhesive is sandwiched between the sandwiching portions 21d.

  In the flexible waterproof joint 40, the hollow portion 41a has a substantially pentagonal shape, and the protrusion fixing portion 22 is formed with two protrusions 22a. In the flexible waterproof joint 40A, the hollow waterproof joint 40A is hollow. The portion 41a is circular, and the projecting fixing portion 22 is formed with a circular protrusion 22a at the outer end.

  Even in the flexible waterproof joints 40 and 40A configured by such a water stop plate, after the fixing groove portion 16 is molded in the preceding concrete structure 12, the insertion fixing portion 21A is inserted and bonded and fixed. Install.

  Then, the outer joint material 26 and the inner joint material 28 are attached to the end face of the joint, and the subsequent concrete structure 13 is cast and constructed as before, and the placing fixing portion 22 is embedded in the concrete. The installation is completed.

  According to the flexible waterproof joints 40 and 40A configured by such a waterproof plate, the fixing of the insertion fixing portion 21A may be inserted into the fixing groove portion 16 formed in the preceding concrete structure 12 in advance and bonded. Compared with the conventional preparatory work before suspending using a reinforcing bar, the number of man-hours can be greatly reduced and construction can be performed in a short time.

1 is a schematic perspective view of a concrete structure to which a flexible waterproof joint according to an embodiment of the present invention is applied. It is a cross-sectional view of the attachment state after construction of the flexible waterproof joint which is AA cross section of FIG. 1 concerning one Embodiment of the flexible waterproof joint of this invention. It is a fragmentary cross-sectional view of each flexible waterproof joint concerning one embodiment of the flexible waterproof joint of this invention. It is a cross-sectional view of the groove part for fixation concerning one Embodiment of the construction method of the flexible water-stopping joint of this invention, and a cross-sectional view of the attachment process of a flexible water-stopping joint. It is a cross-sectional view explaining the state after the completion of construction concerning one embodiment of the construction method of the flexible waterproof joint of this invention, and the state which changed. It is a partial cross-sectional view of each flexible waterproof joint according to another embodiment of the flexible waterproof joint of the present invention. It is a cross-sectional view explaining the state after the completion of construction concerning another embodiment of the construction method of the flexible waterproof joint of this invention, and the deformed state. It is a cross-sectional view concerning further another embodiment of the flexible waterproof joint of this invention, and a cross-sectional view explaining the state after construction completion. It is a cross-sectional view concerning other embodiment of the flexible water-stop joint of this invention, and a cross-sectional view explaining the state after construction completion. It is a cross-sectional view of a conventional water stop plate and an explanatory diagram of its construction method. It is a front view of the conventional flexible waterproof joint, and explanatory drawing of the construction method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 12 Concrete structure 13 Concrete structure 14 Joint part 15 Averaged concrete 16 Fixing groove part 20 Flexible waterproof joint 21 Insertion fixing part 21a Contact adhesion part 21b Metal plate (plate-shaped body)
21c Slit part 21d Clamping part 22 Placing and fixing part 22a Projection part 22b Side seal part 22c End face fixing part 22d Butyl sheet 22e Air vent hole 23 Constriction part 24 Stretching part 24a Plate-like stretching part 25 Adhesive injection path 26 Outer joint material 27 Center joint material 28 Inner joint material 29 Waterproof sheet 30 Flexible waterproof joint 31 Stretchable part 31a Plate-like stretchable part 31b Curved part 40 Flexible waterproof joint 40A Flexible waterproof joint 41 Stretchable part 41a Hollow part

Claims (10)

A flexible waterproof joint that is provided in a joint portion of a concrete structure constructed by passing concrete and enables internal and external waterproofing and relative displacement of the joint portion,
An insertion fixing part inserted and fixed in a fixing groove provided on one of the joint parts of the concrete structure;
A placement fixing portion embedded and fixed by the other placement of the joint portion of the concrete structure;
The insertion fixing portion is connected to one end portion, and the placement fixing portion is connected to the other end portion, and includes an expansion / contraction portion that enables water stop and relative displacement,
The insertion fixing part has a slit part at the inner and outer intermediate parts, and a plate-like body bonded to the fixing groove part is attached to each of the inner and outer surfaces,
The flexible fixing joint, wherein the placement fixing part has a protrusion for increasing the fixing strength.   The flexible waterproof joint according to claim 1, wherein an adhesive injection path is provided in communication with the slit portion of the insertion fixing portion.   2. The flexible waterproof joint according to claim 1, wherein an adhesive is sandwiched between the slit portions of the insertion fixing portion.   The flexible water-stop joint according to any one of claims 1 to 3, wherein an abutting adhesive portion that abuts and adheres to an end surface of the joint portion is provided at a base end portion of the insertion fixing portion. .   The flexible waterproof joint according to any one of claims 1 to 4, wherein the plate-like body is provided so as to protrude from the insertion fixing portion.   The said expansion-contraction part is comprised by the plate-shaped expansion-contraction part provided with the plate-shaped expansion-contraction part or the curved part curved to the said one end part side, The flexible water stop in any one of Claims 1-5 characterized by the above-mentioned. Fittings.   The flexible waterproof joint according to any one of claims 1 to 5, wherein the stretchable part is formed in a hollow shape.   The placement fixing portion includes an end surface fixing portion and a side surface sealing portion bonded to the other end surface and side surface of the joint portion of the concrete structure, and a butyl sheet is provided inside the side surface sealing portion. The flexible waterproof joint according to any one of claims 1 to 7. When constructing a water seal inside and outside a joint part of a concrete structure constructed by passing over concrete and a flexible water seal joint that enables relative displacement of the joint part,
After forming a fixing groove using a groove mold on one of the joints of the concrete structure,
Inserting and bonding the insertion fixing portion of the flexible waterproof joint according to any one of claims 1 to 8 to the fixing groove, and bonding the contact bonding portion,
Next, after partially bonding the joint material for the inner side to the end face of the joint portion at least inside the flexible waterproof joint,
A construction method of a flexible waterproof joint, wherein the other of the joint portions of the concrete structure is placed and constructed so that the placement fixing portion is embedded and fixed. After inserting and bonding the insertion fixing part of the flexible waterproof joint into the fixing groove part,
The stretchable part of the flexible waterproof joint is partially bonded to the joint part outside the insertion fixing part, or partially bonded to the outer joint material bonded to the joint part outside the insertion fixing part, and The construction method for a flexible waterproof joint according to claim 9, wherein a center joint material thicker than the joint spacing of the joint portion is partially adhered to the inside of the insertion fixing portion.

Images