JP4970133B2 - Flexible water stop structure - Google Patents

Description

  The present invention relates to a flexible water-stopping structure, and can be installed on joints of concrete structures such as waterways, water treatment facilities, tunnels, joint grooves, etc. constructed of concrete to enable waterstop and relative displacement. This is designed to prevent damage.

  In the joints of walls such as waterways, water tanks or underground gutters built in the ground such as joint grooves, which are concrete structures constructed with concrete, water is stopped inside and outside and the concrete structures on both sides of the walls are unequal. It is necessary to allow expansion and contraction of wall parts due to subsidence, displacement during earthquakes, temperature changes, etc., and a flexible water-stopping structure with flexible water-stopping members such as rubber and synthetic resin waterstops is adopted. ing.

As such a flexible water-stopping structure, for example, there is a water-stopping structure disclosed in Patent Document 1, and, as shown in FIG. 5, U is located in the middle of the joint material 1 in which an elastic material and one or more stress materials are embedded. While forming the groove-shaped extra length part 2 of a type | mold, and forming the joint material 1 by forming the latching parts 3 and 3 on both sides, the recessed part 6 formed in the joint part 5 between the concrete structures 4 and 4 The extra length portion 2 of the joint material 1 is accommodated in the joint member 1, and the engaging portions 3 and 3 on both sides are attached via anchor bolts 7 and presser plates 8 embedded and fixed in the concrete structures 4 and 4, respectively. Thereby, the protrusion of the joint material 1 to the inside of the concrete structures 4 and 4 is eliminated, and resistance to flow in the case of using a water channel is prevented.
JP 2000-64446 A

Such a water stop structure is constructed not only for newly constructing a concrete structure, but also for providing seismic reinforcement by being provided on an existing concrete structure, or for repair.

However, if this water-stopping structure is to be applied to an existing concrete structure such as a culvert, it is necessary to drill anchor bolts 7 for fixing the joint material 1 in the concrete structures 4 and 4 and attach them to the concrete structure. In some cases, it hits 4 or 4 rebars, and it is often necessary to attach the anchor bolt 7 by shifting the drilling position.

For this reason, it is necessary to measure the bolt pitch at the site when the anchor bolt 7 has been attached, and to manufacture the presser plate 8 and joint material 1 according to the result, and to perform drilling. However, there is a problem that the construction period is long.

  The present invention has been made in view of the problems of the prior art, and is capable of easily manufacturing necessary members in advance regardless of the mounting position of the anchor bolts. It is intended to provide a water stop structure.

In order to solve the above problems, a flexible water-stop structure according to claim 1 of the present invention includes a flexible water-stop member disposed across a joint between concrete structures, and a width direction of the flexible water-stop member. An intermediate part is supported and fixed to a holding member that is pressed against the flat plate-like attachments at both ends and sandwiched between the concrete structures, and anchor bolts attached to the concrete structures, and the base ends are fixed to the concrete structures. And a fixing member that presses the pressing member at a distal end portion and press-contacts the attachment portion , the pressing member is configured in a groove shape, and the fixing member is disposed on the distal end portion and the proximal end portion. The protrusion protruding to the concrete structure side is formed, the protrusion at the tip is formed in a curved shape, and the groove bottom of the pressing member is elastically pressed by the protrusion at the tip of the fixing member. Underwear It is characterized in that the pressure contact.

According to this flexible waterproofing structure, the flexible waterproofing member disposed across the joint between the concrete structures and the flat plate-like attachment portions at both ends in the width direction of the flexible waterproofing member are applied. A pressing member that is pressed between the concrete structure and an anchor bolt attached to the concrete structure, and an intermediate portion is supported and fixed to the base end portion against the concrete structure. And a fixing member that presses and contacts the attachment portion , the pressing member is configured in a groove shape, and a protruding portion that protrudes toward the concrete structure side is formed at the distal end portion and the base end portion of the fixing member. In addition, the protruding portion of the tip is formed in a curved shape, and the protruding portion of the tip of the fixing member presses the groove bottom portion of the pressing member elastically and presses the attachment portion so that it is flexible. Securing part of water-stopping member By pressing the presser member and pressing the presser member at the tip of the fixing member whose intermediate part is supported and fixed to the anchor bolt, the presser member at a predetermined position can be pressed regardless of the anchor bolt position. A water member is attached. Thereby, even before the attachment position of an anchor bolt is decided, a flexible water stop member, a presser member, and a fixing member can be manufactured, and construction is easy and can be performed in a short time.
In addition, since the pressing member is configured in a groove shape, the rigidity can be increased and the weight can be reduced as compared with the plate shape.
Further, the fixing member is formed with protruding portions protruding toward the concrete structure side at the distal end portion and the proximal end portion, and the protruding portion at the distal end portion is formed in a curved shape, so that the fixing member can be more easily bent, and the pressing member Can be more elastically pressed.

Furthermore, the flexible water-stop structure according to claim 2 of the present invention has the length from the distal end portion to the base end portion of the fixing member in accordance with the diameter of the anchor bolt in addition to the configuration according to claim 1 . It is characterized by being 4 times or more.

  According to this flexible water blocking structure, the length from the distal end portion to the base end portion of the fixing member is four times or more the diameter of the anchor bolt, and the fixing member is tightened with the anchor bolt. By increasing the amount of deflection, the pressing member can be pressed elastically.

Furthermore, in the flexible water-stop structure according to claim 3 of the present invention, in addition to the configuration according to claim 1 or 2 , the fixing member is arranged so as to intersect without being orthogonal to the presser member. It is a feature.

  According to this flexible water blocking structure, the fixing member is arranged so as to intersect with the pressing member without being orthogonal to the pressing member, and the fixing member has an angle with respect to the pressing member in the joint width direction of the fixing member. The amount of protrusion can be reduced, and this makes it possible to reduce the mounting width of the flexible water blocking structure itself and save space.

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 fixing member includes the distal end portion and the proximal end before and after the intermediate portion. The portion is formed with an angle.

According to this flexible water blocking structure, the fixing member is formed with an angle between the front and rear end portions and the base end portion of the intermediate portion, and the fixing member is provided with an angle, for example, in a crank shape. So, even if there are obstacles in the mounting position of the fixing member, it can be avoided and mounted, and the anchor bolt and the pressing position can be shifted and fixed, so that it can be pressed regardless of the position of the anchor bolt. It also becomes possible to keep the position interval.

According to the flexible waterproof structure according to claim 1 of the present invention, the flexible waterproof member disposed across the joint between the concrete structures, and the flat plates at both ends in the width direction of the flexible waterproof member A presser member that is pressed against the concrete attachment and sandwiched between the concrete structure, and an intermediate part is supported and fixed to an anchor bolt attached to the concrete structure, and a base end part is applied to the concrete structure. A fixing member that presses the pressing member at a distal end portion and press-contacts the attachment portion , the pressing member is configured in a groove shape, and the fixing member is provided on the distal end portion and the base end portion of the concrete structure. A protruding portion protruding to the side, a protruding portion at the distal end portion is formed in a curved shape, and the protruding portion at the distal end portion of the fixing member elastically presses the groove bottom portion of the pressing member to since the pressure, By pressing the holding member against the anchoring part of the anti-stiffening water member and pressing the holding member at the tip of the fixing member where the middle part is supported and fixed to the anchor bolt, the specified position is maintained regardless of the position of the anchor bolt. It is possible to attach the flexible water stop member by pressing the pressing member. Thereby, even before the attachment position of an anchor bolt is decided, a flexible water stop member, a presser member, and a fixing member can be manufactured, construction is easy, and construction can be performed in a short time.
Moreover, since the pressing member is configured in a groove shape, the rigidity can be increased and the weight can be reduced as compared with the plate shape.
Furthermore, since the fixing member is formed with protruding portions protruding toward the concrete structure side at the distal end portion and the proximal end portion, and the protruding portion at the distal end portion is formed in a curved shape, the fixing member can be further bent. The pressing member can be further elastically pressed.

Furthermore, according to the flexible waterproof structure according to claim 2 of the present invention, the length from the distal end portion of the fixing member to the proximal end portion is set to be four times or more the diameter of the anchor bolt. The amount of deflection when the fixing member is tightened with the anchor bolt can be increased, and the pressing member can be pressed like an elastic spring.

Further, according to the flexible water stop structure according to claim 3 of the present invention, since the fixing member is arranged so as to intersect without being orthogonal to the pressing member, the fixing member has an angle with respect to the pressing member. The amount of protrusion of the fixing member in the joint width direction can be reduced by that amount, thereby reducing the mounting width of the flexible water blocking structure itself and saving space.

Moreover, according to the flexible waterstop structure of claim 4 of the present invention, the fixing member is formed with an angle between the front and rear end portions and the base end portion of the intermediate portion. By giving an angle to the crank shape, even if there are obstacles etc. in the mounting position of the fixing member, it can be avoided and installed, and the anchor bolt and the pressing position can be shifted and fixed, Regardless of the position of the anchor bolt, it is possible to keep the distance between the pressing positions.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
1 and 2 relate to one embodiment of the flexible waterstop structure of the present invention, FIG. 1 is a schematic cross-sectional view of the whole, and FIG. 2 is a partially enlarged view and a partially enlarged perspective view.

  In this flexible water stop structure 10, for example, it is provided so as to straddle the joint portion 12 of the existing concrete structure 11, 11, so that water is stopped and the concrete structures 11, 11 on both sides of the joint portion 12 are unequal. It is characterized by fixing flexible water-stopping members 13 such as rubber and synthetic resin that allow wall portions to expand and contract due to subsidence, displacement during earthquakes, temperature changes, etc. Reinforcing bars etc. in the bolt pitch of newly installed anchor bolts 14 In order to prevent interference with this, it is possible to easily cope with deviations.

  The flexible water-stop member 13 used in the flexible water-stop structure 10 includes a folded portion 13a that is folded in a substantially Ω shape at the middle portion in the width direction of the long band, and has flat plate-like hooks at both ends in the width direction. The attaching portion 13b is provided and is made of an elastic member such as rubber or synthetic resin, and one or more reinforcing members are embedded as required.

  In this flexible waterproof structure 10, the anchoring portions 13 b and 13 b of the flexible waterproof member 13 are arranged so as to straddle the joint portions 12 of the concrete structures 11 and 11. A reinforcing cloth 15 such as polyester is laid on the portion 12, and a flexible waterproofing member 13 is installed on the reinforcing fabric 15, so as to cover the entire upper part of the flexible waterproofing member 13 up to the adhesive portions 13 b and 13 b. A protective cover 16 is provided.

  In this flexible water-stop structure 10, a holding member 17 applied to the attachment portion 13b of the flexible water-stop member 13 is used, and the cross-sectional shape is formed in a U-shape with an upper opening, for example, the groove width Is about 60 mm, the groove height is about 30 mm, and the thickness is about 3 mm. With this cross-sectional shape, the rigidity can be increased and the weight can be reduced as compared with a flat plate shape.

  When it is necessary to further increase the rigidity, a flat plate may be interposed on the groove bottom.

  In the flexible water-stopping structure 10, the holding member 17 is supported and fixed using the fixing member 18 without being directly fixed to the concrete structures 11 and 11 with the anchor bolt 14.

  The fixing member 18 includes a front end projecting portion 18a and a rear end projecting portion 18b that protrude substantially perpendicularly to the front and rear end portions, and an anchor bolt mounting hole 18d is formed in a plate-shaped intermediate portion 18c. The leading end protruding portion 18a protrudes substantially perpendicularly via a curved portion 18e that curves upward with respect to the plate-shaped intermediate portion 18c. In the fixing member 18, the distance L from the front end protruding portion 18 a serving as the action point to the rear end protruding portion 18 b serving as the supporting point of the fixing member 18 with the intermediate portion 18 c as the attachment position is the diameter d of the anchor bolt 14. And the anchor bolt 14 is mounted at the intermediate position, thereby increasing the amount of deflection generated in the fixing member 18 when tightening with the anchor bolt 18 as a force point, and making the holding member 17 elastically springy. It is possible to hold down.

  Furthermore, since the bending portion 18e is provided in the tip protrusion portion 18a of the fixing member 18, it can be more easily bent.

  In such a fixing member 18, for example, the distance L from the front end protrusion 18a to the rear end protrusion 18b is about 200 mm, the width is about 40 mm, the plate thickness is about 12 mm, and the front end protrusion amount is about 40 mm.

  As the anchor bolt 14, for example, a chemical anchor is used, and a stainless steel bolt is used.

  In the flexible waterproof structure 10 using such a member, anchor bolts 14 are drilled and attached to both sides of the joint portion 12 of the existing concrete structures 11 and 11.

  After the anchor bolt 14 is attached, a reinforcing cloth 15 is laid so as to straddle the joint portions 12 of the concrete structures 11, 11, the flexible water-stopping member 13 is placed thereon, and the protective cover 16 is covered. The presser member 17 is disposed on the landing portion 13 b in parallel with the joint portion 12.

  Thereafter, the anchor bolt 14 is inserted into the anchor bolt mounting hole 18d of the intermediate portion 18c of the fixing member 18, and the tip protruding portion 18a is positioned in the groove of the pressing member 17, and is tightened with the nut 14a.

  By repeatedly attaching the fixing member 18 to the anchor bolt 14 and tightening the nut 14a, the flexible water blocking member 13 is fixed.

  By supporting and fixing with the pressing member 17 through the fixing member 18 in this way, the pressing member 17 can be pressed using the deflection of the fixing member 18, and the pressing member 17 can be attached like an elastic spring.

  Further, when the anchor bolt 14 is perforated and attached to the concrete structures 11 and 11, even if the attachment position is shifted in order to prevent interference with the reinforcing bar, as shown in FIG. The position can be adjusted in the width direction of the joint portion 12 within the range, and the position can be freely adjusted in the axial direction of the joint portion 12.

  Therefore, the bolt pitch is measured after the position of the anchor bolt so far is determined, and there is no need to drill holes in the flexible water stop member, presser plate, protective cover, etc. In parallel, the flexible waterproofing member 13, the pressing member 17, and the fixing member 18 can be manufactured, and the construction of the flexible waterproofing structure 10 can be completed in a short time.

  Further, in the flexible waterstop structure 10 of the present invention, as shown in FIG. 3, the fixing member 18 is not disposed at a right angle with respect to the pressing member 17 on the attachment portion 13 a of the flexible waterstop member 13, and the anchor The bolt 14 can be arranged with an angle at the center, the width required for the construction of the flexible waterproof structure 10 can be reduced, and the mounting space can be reduced.

  Furthermore, even when the embedded position of the anchor bolt 17 approaches the planned position where the pressing member 17 is arranged, the same fixing member 18 can be used as it is and the angle can be changed.

  Further, in the flexible waterproof structure 10 of the present invention, as shown in FIG. 4 in a plan view, the fixing member 19 is changed to the above-mentioned linear shape, and an intermediate portion in which the mounting holes 19a of the anchor bolts 17 are formed. The front end side and the rear end side are angled from the portion 19b, the front end side is a front end portion 19c having an L-shaped planar shape, and the rear end side has a flat shape of 45 with respect to the front end portion. A rear end portion 19d, and the front and rear end portions 19c and 19d are integrally formed into a substantially crank shape, and the front and rear end protruding portions 19e projecting downward at the front ends of the front and rear end portions 19c and 19d, 19f is formed, and the tip portion 19c is a curved bending portion 19g.

  The fixing member 19 is formed so that the front and rear end protruding portions 19e and 19f and the anchor bolt mounting hole 19a are positioned in a straight line.

  By using the fixing member 19 configured to have such an angle, as shown in FIG. 4, even if there is an obstacle 20, it is possible to avoid the obstacle 20 and press the holding member 17. If there is no obstruction, it can be pressed at the position to be pressed, and even if there is an obstacle 20, the pressing position by the fixing members 18 and 19 can be set at a constant interval.

  In the above-described embodiment, the flexible waterproofing member has been described as an example in which a folding portion is provided in the intermediate portion. However, the present invention is not limited to this, and a flexible waterproofing member having another shape can also be used.

1 is an overall schematic cross-sectional view according to an embodiment of a flexible waterstop structure of the present invention. 1 is a partially enlarged view and a partially enlarged perspective view according to an embodiment of a flexible waterstop structure of the present invention. It is a schematic plan view of arrangement | positioning of the fixing member concerning one Embodiment of the flexible water stop structure of this invention. It is the top view and perspective view of the fixing member concerning other one embodiment of the flexible water stop structure of this invention. It is a cross-sectional view of the conventional water stop structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Flexible water stop structure 11 Concrete structure 12 Joint part 13 Flexible water stop member 13a Folding part 13b Fitting part 14 Anchor bolt 14a Nut 15 Reinforcement cloth 16 Protective cover 17 Holding member 18 Fixing member 18a Tip protrusion 18b Rear end Protruding portion 18c Intermediate portion 18d Mounting hole 18e Bending portion 19 Fixing member 19a Mounting hole 19b Intermediate portion 19c L-shaped tip portion 19d Rear end portion 19e Tip protruding portion 19f Rear end protruding portion 19g Bending portion 20 Obstacle

Claims (4)

A flexible waterproofing member disposed across the joint between the concrete structures;
A holding member that is pressed against the flat plate-like attachment portions at both ends in the width direction of the flexible water-stopping member so as to be sandwiched between the concrete structures;
An intermediate portion is supported and fixed to an anchor bolt attached to the concrete structure, and a base end portion is applied to the concrete structure, and a fixing member that presses the pressing member at a distal end portion and press-contacts the attachment portion is provided.
The pressing member is configured in a groove shape, and the fixing member is formed with a protruding portion protruding to the concrete structure side at the distal end portion and the proximal end portion, and a protruding portion of the distal end portion is formed in a curved shape, A flexible water blocking structure characterized in that the groove bottom portion of the pressing member is elastically spring-pressed by the protruding portion at the tip end portion of the fixing member to press-contact the attachment portion . The flexible waterstop structure according to claim 1 , wherein a length from the distal end portion to the proximal end portion of the fixing member is four times or more a diameter of the anchor bolt. The flexible waterstop structure according to claim 1 , wherein the fixing member is arranged so as to intersect with the pressing member without being orthogonal to the pressing member. The flexible waterstop structure according to any one of claims 1 to 3, wherein the fixing member is formed with an angle between the distal end portion and the proximal end portion before and after the intermediate portion.

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