JP2008038426A - Flexible water stop joint and its construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible water stop joint for improving its performance of stopping entering water which turns around the inside of a flexible water stop member while avoiding the rupture of a waterproof sheet due to the deformation of a joint portion, and to provide its construction method. <P>SOLUTION: Preceding and following hitting fixed portions 21, 22 of the flexible water stop member 20 are adhered to the waterproof sheets 14, 14, respectively, to prevent the entry of water to the inside of the flexible water stop member 20. The waterproof sheets 14 each have a rupture preventing portion 14a on an area not relating to the entry of water to the inside of the flexible water stop member 20. This prevents the rupture of the waterproof sheets 14, 14 during deformation to improve the performance of stopping water which turns around the inside of the flexible water stop member 20 while avoiding the rupture of the waterproof sheets 14, 14 due to the deformation of the joint portion 13. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a flexible waterproof joint and a construction method thereof, and enables waterproofing and relative displacement of joint parts of concrete structures such as waterways, water treatment facilities, tunnels, joint grooves, etc. constructed by passing concrete. It is intended to improve water stoppage in the flexible water stop joint.

  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 part due to the earthquake displacement and temperature change, etc., and a flexible water-stopping joint provided with a flexible water-stopping member such as a rubber or synthetic resin waterstop plate is interposed. Yes.

In a flexible waterproof joint for a concrete structure such as a joint groove which is such a concrete structure, for example, a flexible rubber joint 1 disclosed in Patent Document 1 is used as a flexible waterproof member, As shown in FIG. 9, a substantially elliptical hollow portion 2, a pair of flange portions 3 and 3 fixed in a substantially V-shaped cross-section across the hollow portion 2, and outside the flange portions 3 and 3 A plurality of protruding ridges 4 are formed so as to protrude, and are positioned so as to sandwich the hollow portion 2 between the concrete structures 5 and 5, and the flange portions 3 and 3 and the plurality of ridges 4 are driven. It is buried and fixed in concrete. And the joint material 6 is provided in the joint part inside the hollow part 2 of the concrete structures 5 and 5. FIG.
JP 2002-167789 A

  In such a flexible water-stopping joint using the flexible rubber joint 1, as shown in FIG. 10, a waterproof sheet is provided on the outer peripheral portion so as to straddle the joint portions of the concrete structures 5 and 5, as shown in FIG. 7 was wound around.

However, when the waterproof sheet 7 is attached to the concrete structures 5 and 5 with an adhesive or the like, the waterproof sheet 7 is broken by the displacement of the concrete structures 5 and 5 due to an earthquake or the like, so that sufficient waterproofness can be obtained. However, on the other hand, there is a problem that if only winding without bonding, water from the gap occurs and sufficient water stoppage cannot be obtained.

Although not shown, the flexible rubber joint 1 is used, but the concrete is not placed on the outside of the flange portions 3 and 3, but is attached to the concrete structure via anchor bolts or the like, and the foam material is attached to the outside of the flange portion. A space that can be deformed by bonding was secured, and a waterproof sheet was also bonded to the outside of the foam material, but in this case as well as the flexible waterproof joint already described, due to displacement such as an earthquake There is a problem that sufficient waterproofness against the breakage of the waterproof sheet and the water entering the flange portion cannot be obtained.

  The present invention has been made in view of the problems of the prior art, and the waterproof sheet does not break due to deformation of the joint portion or the like. It is an object of the present invention to provide a flexible water-stop joint that can be improved 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 includes a joint part of a concrete structure constructed by passing over preceding and succeeding concrete, and an inner and outer waterproof part and the joint part of the joint part. A flexible waterproofing joint that provides a flexible waterproofing member that enables relative displacement, and covers the outer periphery of the joint of the flexible waterproofing member and the adjacent preceding and following concrete with a waterproof sheet. The stiffening water member includes a preceding placement fixing portion and a following placement fixing portion which are embedded and fixed to the preceding and following concrete structures by placement, and the preceding placement fixing portion and the following placement fixing portion. An expansion / contraction part that is provided between and capable of water stopping and relative displacement,
The waterproof sheet is provided with a rupture preventing portion at the time of deformation corresponding to the joint portion, and the leading and fixing placement fixing portions of the flexible waterproof joint member, the waterproof sheet, Is formed by bonding and fixing.

  According to this flexible water-stopping joint, by adhering the waterproof sheet to the leading and subsequent placement fixing portions of the flexible water-stopping member, water can be prevented from entering the inside of the flexible water-stopping member, The waterproof sheet at the time of deformation is provided by providing, for example, a space, a butt part, or a notch shape that is easy to cut, as a break prevention part in a part that does not participate in water intrusion inside the flexible waterproofing member It is possible to prevent breakage.

  According to a second aspect of the present invention, in addition to the structure of the first aspect, the flexible waterproof joint is formed by projecting an adhesive portion that adheres to the waterproof sheet to the leading and trailing placement fixing portions. It is characterized by.

  According to this flexible waterproof joint, an adhesive part that adheres to the waterproof sheet is formed on the leading and subsequent casting fixing parts so as to be easily bonded at the adhesive part of the waterproof sheet. At the same time, by reducing the rigidity of the bonding portion, even if there is a step or the like on the non-landscape or the bonded portion of the waterproof sheet, it is possible to adhere to the bonding portion.

  Furthermore, the flexible water-stop joint according to claim 3 of the present invention has the adhesive portion of the preceding and subsequent placing fixing portions in addition to the configuration according to claim 2, and the tip portion thereof is parallel to the waterproof sheet. At the same time, the base end portion is formed at a right angle.

  According to this flexible water-stopping joint, the adhesive portion of the preceding and subsequent placement fixing portions is formed so that the distal end portion is parallel to the waterproof sheet and the proximal end portion is perpendicular. A simple support fitting such as an angle member can be applied and pressed to a right angle portion between the base end portion and the tip end portion of the adhesive portion of the waterproof sheet, and the shape retention and adhesion of the flexible waterproof member can be facilitated.

  Moreover, in addition to the structure of Claim 2 or 3, the flexible waterproof joint of Claim 4 of this invention arrange | positions an auxiliary | assistant waterproof sheet inside the said adhesion part and the said waterproof sheet, The said adhesion part and the said The auxiliary waterproof sheet is bonded to the waterproof sheet and / or bonded to the waterproof sheet.

  According to this flexible waterproof joint, an auxiliary waterproof sheet is disposed inside the adhesive portion and the waterproof sheet, and the auxiliary waterproof sheet is bonded instead of bonding and / or bonding with the adhesive portion and the waterproof sheet. Thus, the water that wraps around inside can be stopped more completely together with the waterproof sheet or with the auxiliary waterproof sheet adhered inside.

  Furthermore, in addition to the structure in any one of Claims 1-4, the flexible waterproof joint of Claim 5 of this invention is the said between the outer side of the said flexible waterproof member, and the said waterproof sheet. A shape holding member for holding the shape of the flexible water blocking member is provided.

  According to the flexible waterproof joint, a shape holding member that holds the shape of the flexible waterproof member is provided between the outside of the flexible waterproof member and the waterproof sheet, and the shape is maintained. This makes it easy to bond and attach to concrete structures.

  According to a sixth aspect of the present invention, in addition to the structure according to any one of the first to fifth aspects, a joint material is disposed inside the flexible water-stopping member. The present invention is characterized in that a sealing sheet member is provided for preventing the concrete poured out on the material from flowing out.

  According to this flexible waterproof joint, a joint material is arranged inside the flexible waterproof member, and a sealing sheet member is provided to prevent outflow of concrete placed on the joint material. It is possible to prevent the concrete from flowing out more reliably.

  Furthermore, the construction method of the flexible water-stopping joint according to claim 7 of the present invention is that the internal and external water-stop and relative of the joint portion are relative to the joint portion of the concrete structure constructed by passing over the preceding and succeeding concrete. Inside the formwork for placing a concrete structure that sandwiches the joint when installing a flexible water-stopping joint that covers the outside of the joint with a waterproof sheet while providing a flexible water-stopping member that enables displacement A waterproof sheet provided with a breakage preventing portion at the time of deformation corresponding to the joint portion is attached to the flexible water-stop member, and the leading and fixing portions of the flexible water-stopping member whose shape is held by a temporary jig. After fixing and fixing the fixing part and the waterproof sheet, the preceding concrete is placed and the preceding placement fixing part is buried and fixed, and then the temporary jig is removed and the concrete is placed downstream. To fix the laying fixing part It is characterized in that so.

  According to the construction method of the flexible water-stopping joint, the leading and trailing placement of the flexible water-stopping member attached with the waterproof sheet to the preceding and following concrete casting molds and held by the temporary jig. By adhering the fixing portion, the waterproof sheet and the leading and trailing placement fixing portions of the flexible water-stopping member can be easily bonded, and the construction can be easily performed.

  The construction method of the flexible waterproof joint according to claim 8 of the present invention, in addition to the structure according to claim 7, prior to placing the preceding concrete, the waterproof sheet on the preceding concrete side and the preceding After adhering and fixing the placing fixing portion, the preceding concrete is placed, and before placing the succeeding concrete, the waterproof sheet on the following concrete side is attached, and the following placing is performed. It is characterized in that it is bonded and fixed to the fixing portion.

  According to this flexible waterproof joint construction method, before placing the preceding concrete, the waterproof sheet on the preceding concrete side and the preceding placing fixing portion are bonded and fixed, and then the preceding concrete is cast. Before placing the following concrete, attach the waterproof sheet on the following concrete side and adhere and fix it to the following placing fixing part. Even if the adhesive fixing between the part and the waterproof sheet is performed before placing the concrete on the subsequent side, the construction can be performed easily.

  Furthermore, the construction method of the flexible waterproof joint according to claim 9 of the present invention is such that, in addition to the configuration of claim 7 or 8, an adhesive portion to the waterproof sheet is formed on the flexible waterproof member. The flexible water-stop member and the adhesive portion are pressed by a support metal and are bonded to the waterproof sheet without the need for hole processing.

  According to this flexible waterproof joint construction method, the flexible waterproof member is formed with an adhesive portion to the waterproof sheet, and the flexible waterproof member and the adhesive portion are pressed with a support fitting to form a hole. The waterproof sheet is bonded to the waterproof sheet without any need. The waterproof sheet can be supported by supporting the flexible water-proofing member and the bonding portion with a support metal fitting. It becomes possible to bond the adhesive portion of the water member and the waterproof sheet.

  Moreover, the construction method of the flexible water-stopping joint according to claim 10 of the present invention, in addition to the configuration according to any one of claims 7 to 9, The shape is held by a shape holding member provided between an outer side and the waterproof sheet.

  According to the construction method of the flexible waterproof joint, the shape of the flexible waterproof member is held by the shape holding member provided between the outside of the flexible waterproof member and the waterproof sheet. Thus, the shape of the flexible water blocking member can be more easily maintained, and the flexible water blocking member and the waterproof sheet can be more easily bonded.

  Furthermore, in addition to the structure in any one of Claims 7-10, the construction method of the flexible waterproofing joint of Claim 11 of this invention arrange | positions a joint material inside the said flexible waterproofing member, After the sealing sheet member for preventing the concrete from flowing out on the joint material is provided, the concrete is cast.

  According to this flexible waterproof joint construction method, after the joint material is disposed inside the flexible waterproof member, and the sealing sheet member for preventing the outflow of the concrete placed on the joint material is provided Concrete is placed, and a joint material is provided, and by providing a sealing sheet member on the joint material, it is possible to reliably prevent the concrete placed from flowing out.

  According to the flexible waterproof joint according to claim 1 of the present invention, internal and external waterproofing and relative displacement of the joint part are possible in the joint part of the concrete structure constructed by passing over the preceding and succeeding concrete. And a flexible water-stopping joint that covers the outer periphery of the joint portion of the preceding and following concrete with a waterproof sheet. A preceding placement fixing portion and a subsequent placement fixing portion that are embedded and fixed to the preceding and following concrete structures by placement, and a stop provided between the preceding placement fixing portion and the following placement fixing portion. An expansion / contraction part that enables water and relative displacement, and the waterproof sheet is provided with a breakage prevention part at the time of deformation corresponding to the joint part, and the flexible waterproof joint member A leading placement fixing portion and a trailing placement fixing portion; Since the waterproof sheet is bonded and fixed, by adhering the waterproof sheet to the leading and trailing placement fixing parts of the flexible waterproof member, water can enter the flexible waterproof member. By providing the waterproof sheet with a break prevention portion, for example, a space, a butt portion, or a cutout shape that is easy to cut, in a portion that does not participate in water intrusion into the inside of the flexible waterproofing member. The waterproof sheet can be prevented from being broken during deformation. Thereby, a waterproof sheet does not fracture | rupture by deformation | transformation of a joint part, etc., and it can improve water-stopping properties, such as the water which goes around inside a flexible water-stopping member.

  Further, according to the flexible waterproof joint according to claim 2 of the present invention, since the adhesive portion that adheres to the waterproof sheet is protruded and formed in the leading and subsequent placing fixing portions, the waterproof sheet In addition to being able to bond easily at the bonding part, even if there is a step or the like in the bonding part of the non-landing or waterproof sheet, it can be bonded following by weakening the rigidity of the bonding part .

  Furthermore, according to the flexible water-stop joint according to claim 3 of the present invention, the leading end portion is parallel to the waterproof sheet and the proximal end portion is at a right angle with respect to the adhesive portion of the leading and trailing placement fixing portions. It is possible to hold and hold a simple support fitting such as an angle material on the right angle part between the base end and the tip of the waterproof sheet. It can be done easily.

  According to the flexible waterproof joint according to claim 4 of the present invention, an auxiliary waterproof sheet is disposed inside the adhesive part and the waterproof sheet, and adhesion and / or adhesion with the adhesive part and the waterproof sheet is achieved. Instead of the above, the auxiliary waterproof sheet is adhered, so that the water that wraps inward with the waterproof sheet or with the auxiliary waterproof sheet adhered inside can be further completely stopped.

  Further, according to the flexible waterproof joint according to claim 5 of the present invention, the shape holding member that holds the shape of the flexible waterproof member between the outside of the flexible waterproof member and the waterproof sheet. Therefore, it is possible to maintain the shape of the flexible water-stopping member and facilitate adhesion and attachment to a concrete structure.

  Moreover, according to the flexible waterproof joint according to claim 6 of the present invention, the joint material is disposed inside the flexible waterproof member, and for sealing to prevent the concrete placed on the joint material from flowing out. Since the sheet member is provided, it is possible to prevent the concrete to be poured out more reliably.

  Furthermore, according to the construction method of the flexible waterproof joint according to claim 7 of the present invention, the internal and external waterproofing and the joint portion are connected to the joint portion of the concrete structure constructed by passing over the preceding and succeeding concrete. When a flexible water-stopping joint that covers the outside of the joint portion with a waterproof sheet is provided and a concrete structure is placed between the joint portions. A waterproof sheet provided with a breakage prevention portion corresponding to the joint portion is attached to the inner side of the joint, and the flexible water-stopping member has a fixed placement portion and a trailing portion, the shape of which is held by a temporary jig. After fixing and fixing the placement fixing part and the waterproof sheet, the preceding concrete is placed and the preceding placement fixing part is buried and fixed, and then the temporary jig is removed and the subsequent concrete is placed. And laying the fixed casting part As a result, a waterproof sheet is attached to the former and subsequent concrete placement molds, and the leading and subsequent placement fixing portions of the flexible water-stopping member held by the temporary jig are bonded. With this, it is possible to easily bond the waterproof sheet to the leading and trailing placement fixing parts of the flexible water-stopping member, so that construction can be performed easily and water can be prevented from entering inside the flexible water-stopping member. Thus, the water stoppage can be improved.

  Moreover, according to the construction method of the flexible waterproof joint according to claim 8 of the present invention, the waterproof sheet on the preceding concrete side and the preceding placing fixing portion are bonded to each other before placing the preceding concrete. After fixing, the preceding concrete is cast, and before placing the following concrete, the waterproof sheet on the following concrete side is attached and fixed to the following casting fixing portion. Therefore, it is possible to perform the construction even if the subsequent casting fixing part and the waterproof sheet are bonded and fixed before the subsequent concrete placing, and the construction can be facilitated, and the inner side of the flexible waterproofing member The water stoppage can be improved by preventing the intrusion of water and the like.

  Furthermore, according to the construction method of the flexible waterproof joint according to claim 9 of the present invention, the flexible waterproof member is formed with an adhesive portion to the waterproof sheet, and the flexible waterproof member and the adhesive portion are formed. Is supported by the support metal fittings so that the waterproof sheet can be supported by supporting the flexible waterproofing member and the adhesive portion with the support metal fittings. The adhesive portion of the flexible water-stopping member and the waterproof sheet can be bonded without processing.

  Moreover, according to the construction method of the flexible waterproofing joint of Claim 10 of this invention, the shape maintenance which provided the said flexible waterproofing member between the outer side of the said flexible waterproofing member, and the said waterproof sheet | seat Since the shape is held by the member, the shape of the flexible waterproof member can be more easily maintained, and the flexible waterproof member and the waterproof sheet can be bonded more easily.

  Furthermore, according to the construction method of the flexible waterproof joint according to claim 11 of the present invention, a joint material is arranged inside the flexible waterproof member, and the outflow of the concrete placed on the joint material is prevented. Since the concrete is placed after the sealing sheet member is provided, the sealing sheet member provided on the joint material can surely prevent the concrete placed from flowing out.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 and 2 relate to one embodiment of the flexible water-stopping joint of the present invention, FIG. 1 is a schematic perspective view of a concrete structure provided with the flexible water-stopping joint, and FIG. It is a partial cross section by the side of a concrete structure. 3 and 4 relate to one embodiment of the construction method of the flexible waterproof joint according to the present invention, FIG. 3 is a cross-sectional view of each process in the first half part, and FIG. 4 is a cross-sectional view of each process in the second half part. FIG.

  In this flexible water-stopping joint 10, the water-stopping member 20 is provided on the joint portions 13 of the concrete structures 11 and 12 constructed by piercing the concrete to stop the water and both sides of the joint portion 13. The concrete structures 11 and 12 can be displaced relative to each other due to an earthquake or a temperature change, and a waterproof sheet 14 is provided outside the joint portion 13 of the concrete structures 11 and 12 to improve the water stoppage. To do.

  In the joint groove, which is an example of a concrete structure, for example, as shown in FIG. 1, boxes 11 and 12 having a rectangular cross section and a predetermined length are connected by a joint portion 13. A sheet 14 is provided, and is generally constructed by passing through the joint portion 13 every predetermined length (each box) by spotting on the upper surface of the leveled concrete 15 by the open-cut method. After completion, it is buried back into the ground at a predetermined depth. Here, a case where there is an outer structure not shown in the side wall will be described as an example.

  The flexible waterproofing member 20 provided in the joint part 13 of such a concrete structure 11 and 12 is what is called an outer waterproofing type waterproofing board as shown in FIG. And a stretchable portion 23 that allows water stop and relative displacement by expanding and contracting between the preceding cast fixed portion 21 and the subsequent cast fixed portion 22. 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 into a ring or the like in the factory or at the site according to the shape of the joint part 13. Configured.

  The preceding placement fixing portion 21 and the subsequent placement fixing portion 22 are determined for convenience of description, and are structurally the same and symmetrically arranged, and any of them may be preceded or succeeded.

  In this flexible water blocking member 20, the preceding placement fixing portion 21 and the subsequent placement fixing portion 22 have the same shape, and the outer periphery of the joint portion 13 of the preceding and succeeding concrete structures 11, 12 is V-shaped. The side seal portions 21a, 22a applied to the inclined surfaces 11a, 12a and the outer side surfaces are substantially perpendicular to the side seal portions 21a, 22a, and the inner side surfaces are substantially linear with respect to the inclined surfaces 11a, 12a. Plate-like anchor portions 21b and 22b are provided, and bulging portions 21c and 22c bulging outwardly from both ends are provided at the tip portions of the respective plate-like anchor portions 21b and 22b.

  Further, between the preceding placement fixing portion 21 and the subsequent placement fixing portion 22, a substantially inverted U-shaped expansion / contraction portion 23 is disposed as viewed from the inside of the joint portion 13. The inner end portions of the preceding placement fixing portion 21 and the subsequent placement fixing portion 22 are connected to the opening end portion of each of the two, and are integrally formed.

  Further, in this flexible water-stopping member 20, butyl sheets 21d and 22d are attached to the concrete structures 11 and 12 side of the side seal portions 21a and 22a of the preceding placement fixing portion 21 and the subsequent placement fixing portion 22, respectively. In addition, it is possible to ensure waterproofness between concrete.

  In addition, in this flexible waterproofing member 20, an adhesive portion 24 for adhesion to the waterproof sheet 14 provided on the outer periphery of the joint portion 13 is provided, and the preceding placement fixing portion 21 and the subsequent placement fixing portion 22 are provided. Adhesive base end portions 24a and 24a parallel to the end face of the joint portion 13 are provided from the front end portions of the side seal portions 21a and 22a, and the adhesive front end portions 24b and 24b projecting at right angles to the front end and parallel to the waterproof sheet 14 are integrated. It is molded into By setting the bonding base end portions 24a, 24a and the bonding tip end portions 24b, 24b to a right angle, the bonding portion 24 can be easily supported using a right angle support bracket such as an angle member. Can be made easier.

  The adhesive tip portions 24b and 24b are located outside the joint portion 13 from the top of the stretchable portion 23, and the top of the stretchable portion 23 is bonded to the waterproof sheet 14 with the adhesive tip portions 24b and 24b bonded to the waterproof sheet 14. A space is formed in the space.

  Note that the bonding tip portions 24b, 24b absorb the absorption even if the waterproof sheet 14 is uneven or has a step in the bonded portion of the waterproof sheet 14 by making the rigidity smaller than other parts. It is preferable to be able to bond.

  Foam support members 25 are provided on both sides and the outside of the expansion / contraction part 23 of the flexible water-stopping member 20 so that the shape can be maintained by adhesion or partial adhesion, and the side support members 25a and 25a on both sides are provided. It is comprised with the outer side outer supporting member 25b. These support members 25 are made of a foam material such as sponge rubber or polystyrene, and the outer support member 25b is disposed in a space formed by the waterproof sheet 14 and the top of the stretchable portion 23, and the outer surface is a concrete structure. 11 and 12, and the shape of the flexible water blocking member 20 can be maintained with its rigidity. The side support members 25a and 25a are arranged such that the cross-sectional shape is formed into a substantially triangular shape corresponding to the spaces of the side seal parts 21a and 22a and the expansion / contraction part 23, respectively.

  Further, the waterproof sheet 14 bonded to the flexible water-stopping member 20 is provided with a breakage prevention portion 14a so as not to break due to the displacement of the joint portion 13, and the outside of the expansion / contraction portion 23 of the flexible water-stopping member 20 is provided. The part located in is divided and is a space with an interval of about 50 mm. In addition, as the fracture | rupture prevention part 14a, you may comprise not only in space but in the notch shape etc. which made the butting part and easy to cut.

  The waterproof sheet 14 only needs to be able to stop water between the outer side of the flexible waterproof member 20 and the concrete structures 11 and 12, and the inner side can be stopped by the flexible waterproof member 20 itself. There is no problem even if 14 is divided and the central portion is spaced by the fracture preventing portion 14a.

  And this waterproof sheet 14 and the adhesion | attachment front-end | tip parts 24b and 24b of the adhesion part 24 of the flexible water-proof member 20 are adhere | attached, and it can prevent intrusion of water.

  It should be noted that the adhesive tip portions 24b and 24b of the bonding portion 24 are cut off obliquely so that the adhesiveness with the waterproof sheet 14 can be improved and the water stoppage can be further improved.

  The waterproof sheet 14 is perforated from the top of the waterproof sheet 14, driven by a gripping anchor 16, and attached to a bottom plate or a side wall (not shown) that is an outer structure of the side wall portion, and a jig for supporting the flexible waterproofing member 20 is tightened. For this purpose, after bonding to the bonding portion 24 of the flexible waterproofing member 20, the jig is removed, and the hole is closed with the restoration waterproof sheet 17.

  Further, in the flexible waterproof joint 10, the joint material 26 is attached between the stretchable portion 23 of the flexible waterproof member 20 and the end surfaces of the concrete structures 11 and 12.

  Next, the construction method to the joint part 13 of the concrete structures 11 and 12 of the flexible waterproof joint 10 comprised in this way is demonstrated with FIG. 3 and FIG.

  In the construction of the flexible waterproof joint 10, first, the bottom plate or the side wall (not shown) for molding the outside of the concrete structures 11, 12 is installed on both sides sandwiching the joint portion 13. The waterproof sheets 14 and 14 are arranged on the inner side with a space, for example, 50 mm, to be the fracture preventing portion 14 a, drilled from above the waterproof sheets 14 and 14, and the grip anchors 16 on both sides of the attachment range of the flexible waterproof member 20. In the circumferential direction, a plurality of drums are driven at a predetermined pitch, for example, a 500 mm pitch. On the waterproof sheets 14, 14, an installation range where the flexible waterproofing member 20 is attached and the adhesive portions 24 at both ends are located, for example, a range of 250 mm is previously marked (see FIG. 3A).

  Next, the flexible waterproofing member 20 is installed using the three jigs 31, 32, and 33 (see FIG. 3B). That is, a plate-like treatment is provided on the bonding tip 24b of the bonding portion 24 on the preceding placement fixing portion 21 side of the flexible water-stopping member 20 held in shape by the two side support members 25a and 25a and the outer support member 25b. The tool 31 is applied, and the bolt 31a is fastened and fixed to the grip anchor 16. At this time, the waterproof sheet 14, the bonding tip portion 24 b of the flexible waterproofing member 20, and the outer support member 25 b perform bonding processing.

  Further, a jig 32 made of an angle material is applied to the adhesive base end portion 24a and the adhesive distal end portion 24b of the adhesive portion 24 on the subsequent casting fixing portion 22 side of the flexible water blocking member 20, and the bolt 32a is tightened to the grip anchor 16. And fix. At this time, the adhesive tip 24b and the outer support member 25b are each subjected to an adhesive treatment even on the downstream side of the waterproof sheet 14 and the flexible waterproofing member 20.

  Then, an L-shaped jig 33 is connected to the angle jig 32 through a long hole so that the position of the jig 33 can be adjusted. To do.

  In the installed state of the flexible water-stopping member 20, the joint material 26 is attached between the expansion and contraction portions 23, and the side seal portions 21 a and 22 a of the preceding placement fixing portion 21 and the subsequent placement fixing portion 22. The butyl sheets 21d and 22d are attached to the concrete structures 11 and 12 side, respectively.

Next, preparation for placing prior concrete is performed, and concrete is placed (see FIG. 3C).
After the time for completing the bonding process between the waterproof sheet 14 and the flexible waterproofing member 20 elapses, the jig 31 on the preceding side is removed together with the bolt 31a, and the restoration waterproof sheet 17 is attached to the hole of the waterproof sheet 14 To make it sealed. And after installing formwork, such as the end form 34 which shape | molds the end surface of the joint part 13 of the concrete structure 11 of a precedence side, precedence concrete is laid.

  Before placing the preceding concrete, a rubber sheet may be affixed to the joint material 26 and the wife mold 34 as a sealing sheet material that prevents the concrete from flowing out. The concrete can be reliably prevented from flowing out.

  After placing the preceding concrete and curing, the two jigs 32 and 33 on the following side are removed, and the end form 34 and other bottom slabs or side walls are removed, and the waterproof sheet 17 for restoration is provided in the hole of the waterproof sheet 14. Is put into a sealed state (see FIG. 4A).

  Further, a foam joint material 26 such as rubber or sponge is disposed in place of the end mold 34 on the end face of the joint portion 13, and is adhered and attached to the end face of the joint portion 13 of the concrete structure 12. In order to reduce deformation resistance and prevent damage during compression deformation (see FIG. 4B).

  After that, after assembling the bottom slab or side wall necessary for the construction of the subsequent concrete structure 12, the subsequent concrete is placed, and after curing, the bottom slab or the side wall on the subsequent side is removed and flexible water blocking is performed. The joint 10 is completed (see FIG. 4C).

  According to such a flexible waterproof joint 10 and its construction method, the adhesive tip portions 24b, 24b of the adhesive portion 24 of the flexible waterproof member 20 and the waterproof sheet 14 are bonded together. It is possible to improve the water-stopping property between the back side of the water member 20 and the concrete structures 11 and 12, and the waterproof sheet 14 even when the concrete water-proof member 20 is deformed by the displacement of the concrete structures 11 and 12. , 14 is provided with the breakage preventing portion 14a, so that the waterproof sheets 14, 14 can be prevented from being broken and the water-stopped state can be maintained.

  Moreover, according to this flexible waterproof joint 10 and its construction method, since the adhesive portions 24 and 24 that adhere to the waterproof sheets 14 and 14 are formed to protrude, the waterproof sheets 14 and 14 and the adhesive portions 24 and 24 It can be easily bonded, and the rigidity of the bonding portion 24 is weakened so that even if the waterproof sheets 14 and 14 are uneven or there is a step in the bonded portion of the waterproof sheet 14, it adheres to it. You can also

  Furthermore, since the bonding tip end portion 24b and the bonding base end portion 24a of the bonding portion 24 are perpendicular to each other, when the waterproof sheet is bonded, a simple metal fitting 32 such as an angle member can be applied to the right-angled portion and pressed. In addition, it is possible to easily maintain the shape of the flexible water-stopping member 20 and bond it.

  Furthermore, according to this flexible water-stop joint 10 and its construction method, the side support that maintains the shape of the flexible water-stop member 20 between the outside of the flexible water-stop member 20 and the waterproof sheets 14 and 14. Since the member 25a and the outer support member 25b are provided as shape maintaining members, the shape of the flexible water blocking member 20 can be maintained to facilitate adhesion and attachment to the concrete structures 11 and 12.

  Next, another embodiment in which the flexible waterproof joint of the present invention and its construction method are applied to an outer waterproofing waterproof plate will be described with reference to FIGS. 5 and 6, which is the same as the construction method already described. Parts are denoted by the same symbols, and description thereof is omitted.

  Even in the construction method of the flexible water-stopping joint, the flexible water-stopping member 20 already described is used, and in the construction, the waterproof sheets 14 and 14 are not perforated, and the construction is performed without the need for restoration. Yes.

  In the construction of the flexible waterproof joint 10, first, the bottom plate or the side wall (not shown) for molding the outside of the concrete structures 11, 12 is installed on both sides sandwiching the joint portion 13. The waterproof sheet 14 is disposed up to the center of the joint portion 13 only on the inner side of the bottom plate or side wall. Then, the grip anchor 16 is driven into the bottom plate or the side wall on the trailing side outside the attachment range of the flexible water-stopping member 20, and a plurality of punch anchors are driven in the circumferential direction at a predetermined pitch, for example, a 500 mm pitch.

  In addition, the waterproof sheet 14 and the bottom plate or the side wall of the following line are preliminarily marked with an installation range, for example, a range of 250 mm, where the flexible waterproofing member 20 is attached and the adhesive portions 24 at both ends are located (see FIG. 5 (a)).

  Next, the flexible waterproofing member 20 is installed using the two jigs 41 and 42 (see FIG. 5B). That is, the bonding distal end portion 24b and the bonding proximal end of the bonding portion 24 on the downstream casting fixing portion 22 side of the flexible water blocking member 20 held in shape by the two side supporting members 25a and 25a and the outer supporting member 25b. An angle material jig 41 is applied to the portion 24a, and the grip anchor 16 is fastened and fixed with a bolt 41a. Then, an L-shaped jig 42 is connected to the angle material jig 41 through a long hole so that the position can be adjusted. Support the inner surface.

  At this time, the waterproof sheet 14 on the preceding side, the bonding tip portion 24b of the flexible waterproofing member 20, and the outer support member 25b are each subjected to bonding treatment. In addition, a spacer 43 such as a rubber plate corresponding to the thickness of the waterproof sheet is inserted between the adhesive tip 24b on the following side and the bottom plate or the side wall.

  In the installed state of the flexible water-stopping member 20, the joint material 26 is attached between the expansion and contraction portions 23, and the side seal portions 21 a and 22 a of the preceding placement fixing portion 21 and the subsequent placement fixing portion 22. The butyl sheets 21d and 22d are attached to the concrete structures 11 and 12 side, respectively.

Next, preparation for placing prior concrete is performed, and concrete is placed (see FIG. 5C).
After the time for completing the bonding process between the waterproof sheet 14 on the preceding side and the flexible waterproofing member 20, the jig 42 supporting the inner surface on the preceding side is supported on one side only on the inner surface on the following side. After setting a state and installing a formwork such as the end formwork 34 for forming the end face of the joint portion 13 of the concrete structure 11 on the preceding side, the preceding concrete is placed.

  Before placing the preceding concrete, a rubber sheet may be affixed to the joint material 26 and the wife mold 34 as a sealing sheet material that prevents the concrete from flowing out. The concrete can be reliably prevented from flowing out.

  In this way, after the preceding concrete is placed and cured, the two jigs 41 and 42 on the following side are removed, the wife formwork 34 is removed, and the spacer 43 inside the bottom plate or the side wall on the following side is removed, and the waterproof sheet 14 is removed. Are arranged at intervals as the fracture preventing portion 14a (see FIG. 6A). At this time, since the preceding placement fixing portion 21 of the flexible water blocking member 20 is supported by the preceding concrete structure 11, the adhesive portion 24 on the subsequent placement fixing portion 22 side is connected to the inside of the joint portion 13. The waterproof sheet 14 is installed while being pushed, and the waterproof sheet 14 on the rear side, the bonding tip portion 24b on the subsequent casting fixing portion 22 side, and the outer support member 25b on the flexible water-stopping member 20 are subjected to an adhesive treatment, respectively. Do.

Thereafter, a foam joint material 26 such as rubber or sponge is disposed in place of the end mold 34 on the end face of the joint portion 13, and is adhered and attached to the end face of the joint portion 13 of the concrete structure 12. The deformation resistance at the time of compressive deformation 20 is reduced and damage is prevented (see FIG. 6B).
Finally, following concrete is cast to complete the flexible waterproof joint 10 (see FIG. 6C).

  According to such a construction method of the flexible waterproof joint 10, the flexible waterproof joint 10 can be constructed by installing the flexible waterproof member 20 without drilling the waterproof sheets 14, 14. The waterproof sheet is not required to be restored and construction is facilitated, and no holes are formed, so that the water stoppage can be maintained. In addition, the flexible waterproof joint 10 and the construction method described above are the same. Has the effect of.

  In order to further improve the water-stopping property of the waterproof sheet 14 with this flexible waterproof joint construction method, as shown in FIG. The waterproof sheets 45 are attached to each other.

According to such a flexible waterproof joint and its construction method, the auxiliary waterproof sheet 45 is adhered to the inside of the adhesive tip 24b of the connection part 24 of the flexible waterproof member 20 and the waterproof sheet 14. In addition, the auxiliary waterproof sheet 45 bonded to the inner side can stop water entering the inner side of the flexible water blocking member 20 more completely.

When the auxiliary waterproof sheets 45, 45 are used, the step of bonding the trailing side prevention sheet 14 and the outer side of the bonding tip 24b of the flexible waterproofing member 20 is omitted, and the inner side is bonded to the auxiliary waterproof sheet 45. By doing so, the construction can be simplified.

  Next, another embodiment of the flexible waterproof joint and its construction method according to the present invention will be described with reference to FIGS. 8 (a) and 8 (b). Are given the same symbols and their explanation is omitted.

  In this flexible waterproof joint and its construction method, a flexible waterproof member 50 having a shape different from that of the flexible waterproof member 20 already described is used. In FIG.

  The flexible waterproofing member 50 provided in the joint portion 13 of the concrete structures 11 and 12 is called a so-called outer waterproofing waterproofing plate, and includes a leading placement fixing portion 51 and a trailing placement fixing portion. 52, and a stretchable portion 53 that allows water stop and relative displacement by expanding and contracting between the preceding placement fixing portion 51 and the subsequent placement fixing portion 52, and is made of a flexible material such as rubber or synthetic resin. It is integrally formed in the cross-sectional direction by a material, and in the longitudinal direction, the divided parts are formed into a ring shape or the like in the factory or on the site according to the shape of the joint portion 13.

  The preceding placement fixing portion 51 and the subsequent placement fixing portion 52 are determined for convenience of description, and are structurally the same and symmetrically arranged, and any of them may be the preceding or following.

  The preceding placement fixing portion 51 and the subsequent placement fixing portion 52 of the flexible water-stopping joint 50 are respectively provided on the outer surface of the preceding concrete structure 11 that is placed first and the subsequent concrete structure 12 that is placed later. Plate-like side surface seal portions 51a and 52a arranged in a straight line with the joint portion 13 applied to the outer surface of the joint structure 13 protruding from the respective side surface seal portions 51a and 52a toward the center in the concrete structures 11 and 12. Thus, two anchor portions 51b and 52b are formed, and bulging portions 51c and 52c bulging at the tip portion are formed. And the anchor part and the bulging part near the end surface of the joint part 13 are made larger than the inner part far from the end surface, and can be firmly embedded and fixed when embedded and fixed by placing concrete.

  In addition, butyl sheets 51d and 52d are provided on the inner side surfaces of the side seal portions 51a and 52a, respectively, and are adhered by the adhesive force, and the concrete structures 11 and 12, the preceding placement fixing portion 51, and the subsequent strike. The water stoppage between the installation and fixing portion 52 can be secured.

  Furthermore, in the flexible waterproof member 50 shown in FIG. 8B, in order to improve the adhesiveness with the waterproof sheet, the adhesive tip portions 51e and 52e which are thin and have low rigidity are respectively formed.

  The stretchable portion 53 of the flexible waterproof joint 50 provided between the preceding placement fixing portion 51 and the subsequent placement fixing portion 52 has a hollow substantially inverted trapezoidal shape when viewed from the inside of the joint portion 13. The inverted trapezoidal bottom portion (upper side of the drawing in the figure) that has a cross-sectional shape is substantially flush with the outer side surfaces of the side seal portions 51a and 52a of the preceding placement fixing portion 51 and the subsequent placement fixing portion 52. The inverted trapezoidal top part (lower part of the drawing in the drawing) of the expansion / contraction part 53 is formed so as to protrude inside the joint part 13. Only the inverted trapezoid bottom portion (upper portion of the drawing in the figure) where the thickness of the hollow portion of the stretchable portion 53 is outside is made thinner than the other portions, so that the absorption of displacement can be increased.

  In the flexible waterproof joint 10 using such a flexible waterproof member 50, the waterproof sheets 14 and 14 are arranged via the fracture preventing part 14a with the joint part 13 interposed therebetween, and the waterproof sheets 14 and 14 are flexible. The outer side surfaces of the preceding placement fixing portion 51 and the subsequent placement fixing portion 52 of the water stop member 50 are bonded and bonded. A joint material 26 is interposed between the end surfaces of the concrete structures 11 and 12.

  In addition, in the flexible waterproofing member 50 shown in FIG.8 (b), there exists a level | step difference etc. in the non-landing or the bonding part of a waterproof sheet by adhere | attaching with the waterproof sheet 14 via the adhesion front-end | tip parts 51e and 52e. Can also follow these, and can adhere more reliably.

  Accordingly, it is possible to prevent water and the like from entering the inside of the flexible water-stopping member 50 at the joint portion 13, improve water-stopping properties, and the waterproof sheets 14, 14 even if the flexible water-stopping member 50 is deformed. Since the break prevention part 14a is provided in the waterproof sheet 14, 14, the waterproof sheets 14 and 14 are not broken and the water stoppage can be maintained.

  Note that the breakage preventing portion 14a of the waterproof sheets 14 and 14 may be any of a space, a butt portion, a cutout shape that is easy to cut, and the like.

  The construction method of the flexible waterproof joint using such a flexible waterproof member 50 needs to change the shape of the jig to be used because the shape of the flexible waterproof member 50 is different. Since it can be constructed in the same process as the case where the stiffening water member 20 is used, the description is omitted here.

  In addition, in the case of construction, it may be either a case where the waterproof sheets 14 and 14 are subjected to hole processing or a case where the waterproof sheets 14 and 14 are not subjected to hole processing. The member 50 is bonded.

  In addition, an auxiliary waterproof sheet may be used to improve waterproofness, and a sealing sheet member may be attached to the joint material 26 to prevent the poured concrete from flowing out.

  According to the construction method of the flexible waterproof joint using such a flexible waterproof member 50, there exists an effect similar to the construction method of the flexible waterproof joint using the flexible waterproof member 20 already demonstrated.

It is a schematic perspective view of the concrete structure in which the flexible water-stopping joint concerning one Embodiment of this invention is provided. It is a partial cross section by the side of the concrete structure of the flexible waterproof joint concerning one embodiment of the flexible waterproof joint of this invention. It is a cross-sectional view of each process of the first half part concerning one Embodiment of the construction method of the flexible waterproof joint of this invention. It is a cross-sectional view of each process of the second half part concerning one Embodiment of the construction method of the flexible waterproof joint of this invention. It is a cross-sectional view of each process of the front half part concerning other embodiment of the construction method of the flexible waterproof joint of this invention. It is a cross-sectional view of each process of the latter half part concerning other one Embodiment of the construction method of the flexible waterproof joint of this invention. It is a partial cross section by the side of the concrete structure of the flexible waterproof joint concerning other embodiment of the flexible waterproof joint of this invention. It is a partial cross-sectional view in the side surface of the concrete structure of each flexible waterproof joint concerning further another embodiment of the flexible waterproof joint of this invention. It is a cross-sectional view of a conventional water stop plate. It is a schematic perspective view of the concrete structure in which the conventional flexible waterproof joint is provided.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Flexible waterproof joint 11 Concrete structure 11a Inclined surface 12 Concrete structure 12a Inclined surface 13 Joint part 14 Waterproof sheet 14a Breaking prevention part 15 Leveling concrete 16 Gripping anchor 17 Restoration waterproof sheet 20 Flexible waterproof member 21 Preliminary placement fixing portion 21a Side seal portion 21b Anchor portion 21c Swelling portion 21d Butyl sheet 22 Subsequent placement fixing portion 22a Side seal portion 22b Anchor portion 22c Swelling portion 22d Butyl sheet 23 Stretching portion 24 Adhesion portion 24a Adhesive base end Portion 24b Bonding tip 25 Support member 25a Side support member 25b Outer support member 26 Joint material 31 Jig 31a Bolt 32 Jig 32a Bolt 33 Jig 34 Wife mold 41 Jig 41a Bolt 42 Jig 43 Spacer 50 Flexible Water-stopping member 51 Advance placement and fixing 52 trailing hitting set fixing portion 51e bonding tip 52e bonding tip 53 contracted parts

Claims (11)

A flexible water-stopping member is provided at the joint portion of the concrete structure constructed by passing over the preceding and succeeding concretes, and enables internal and external water stop and relative displacement of the joint portion. And a flexible waterproof joint that covers the outer periphery of the joint portion of the adjacent preceding and following concrete with a waterproof sheet,
The flexible water stop member includes a preceding placement fixing portion and a subsequent placement fixing portion that are embedded and fixed to the preceding and subsequent concrete structures by placement,
A telescopic portion provided between the preceding placement fixing portion and the subsequent placement fixing portion and capable of water stopping and relative displacement;
The waterproof sheet is provided with a breakage preventing portion at the time of deformation corresponding to the joint portion,
A flexible waterproof joint, wherein the leading and fixing portions of the flexible waterproof joint member are bonded and fixed to the waterproof sheet.   The flexible waterproof joint according to claim 1, wherein an adhesive portion that adheres to the waterproof sheet is formed on the leading and trailing placement fixing portions.   3. The bonding portion of the leading and trailing placement fixing portions is formed so that a distal end portion thereof is parallel to the waterproof sheet and a proximal end portion thereof is a right angle. Stiff water joint.   The auxiliary waterproof sheet is disposed inside the adhesive part and the waterproof sheet, and the auxiliary waterproof sheet is bonded to the adhesive part and / or the waterproof sheet instead of bonding and / or bonding. The flexible waterproof joint according to 2 or 3.   The shape holding member which hold | maintains the shape of the said flexible water stop member between the outer side of the said flexible water stop member and the said waterproof sheet is provided, The any one of Claims 1-4 characterized by the above-mentioned. Flexible waterproof joint.   The joint sheet material is disposed inside the flexible water-stopping member, and a sealing sheet member is provided to prevent the concrete placed on the joint material from flowing out. The flexible waterproof joint as described. The joint part of the concrete structure constructed by passing over the preceding and succeeding concrete is provided with a water-proofing member that allows internal and external water-stopping and relative displacement of the joint part, and the outside of the joint part is waterproofed When constructing a flexible waterproof joint that is covered with a sheet,
A waterproof sheet provided with a rupture preventing portion at the time of deformation corresponding to the joint portion was attached to the inside of the casting mold for the concrete structure sandwiching the joint portion, and the shape was held by a temporary jig. After adhering and fixing the preceding casting fixing part and the subsequent casting fixing part of the flexible water-stopping member and the waterproof sheet, the preceding concrete is placed and the preceding casting fixing part is buried and fixed, A construction method for a flexible water-stop joint, wherein the temporary jig is removed and the subsequent concrete is cast to embed and fix the subsequent casting fixed portion.   Prior to placing the preceding concrete, after adhering and fixing the waterproof sheet on the preceding concrete side and the preceding placing fixing portion, the preceding concrete is placed, and the following concrete is placed. The construction method for a flexible waterproof joint according to claim 7, wherein the waterproof sheet on the concrete side of the following is attached to the front and the adhesive is fixed to the subsequent casting fixing portion.   An adhesive part to the waterproof sheet is formed on the flexible waterproof member, and the flexible waterproof member and the adhesive part are pressed with a support metal fitting so as to adhere to the waterproof sheet without the need for hole processing. The construction method of the flexible waterproof joint of Claim 7 or 8 characterized by the above-mentioned.   The shape of the flexible water blocking member is held by a shape holding member provided between the outside of the flexible water blocking member and the waterproof sheet. The construction method of the flexible waterproofing joint as described in any one of. The joint material is placed after the joint material is disposed inside the flexible water-stopping member, and the sealing sheet member for preventing the flow of the concrete placed on the joint material is provided. The construction method of the flexible waterproof joint in any one of Claims 7-10 to do.

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