JP2019112914A - Fixing structure of flexible water blocking member - Google Patents

Abstract

To provide a fixing structure of a flexible water blocking member capable of securing sufficient water blocking property against high water pressure and the like.SOLUTION: A fixing structure 10 of the flexible water blocking member fixes a flexible water blocking member 20; which includes an extensible portion 21 permitting displacement, and anchorage portions 22 for fixation extended to the extensible portion 21 and provided at both end edge portions; to a joint portion 3 of a structure 1 via holding members 30 that abut the anchorage portions 22. The pressing member 30 is provided with a friction increasing portion 32 on a surface 31 to be in contact with the anchorage portion 22.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fixing structure of a flexible water blocking member.

  It is necessary to stop the water inside and outside the joints of various structures, and to allow expansion and contraction of the wall parts due to uneven settlement of the structures on both sides, displacement during earthquakes, temperature change, etc. A flexible water blocking member such as a water blocking plate of rubber or synthetic resin is provided between the structures straddling the inside of the structure and at the joint portion.

For example, the fixation of the flexible water blocking member in a concrete structure such as a box culvert can be achieved by implanting anchor bolts along the surface of one of the joints in the joint and the longitudinal direction of the surface of the joints on both sides. It has been done by inserting a bolt hole formed in a flexible water blocking member into an anchor bolt and tightening it with a nut via a pressure plate.
Also, do not form a bolt hole in the flexible water blocking member, place the pressing plate, fix the flexible water blocking member by pressing one end of the fixing bracket whose intermediate part is inserted into the anchor bolt against the pressing plate and tightening it. What has been made possible is disclosed (see Patent Document 1).

JP, 2014-222001, A

In the conventional structure in which the flexible water blocking member is fixed via the pressing plate, if it is intended to cope with the tensile force applied to the flexible water blocking member in order to ensure water blocking by high water pressure applied to the flexible water blocking member, It is conceivable to increase the clamping force by the anchor bolt.
However, in order to increase the tightening force by the anchor bolt, it is necessary to secure the strength of the presser plate, and if the presser plate is thickened, it is necessary to change the length of the anchor bolt or to increase the number or to increase the number. And can not easily ensure water-stopping ability to cope with high water pressure and the like. In particular, when replacing the existing flexible water blocking member, changing the specifications of the anchor bolt is more complicated and causes an increase in the construction period.
For this reason, development of the fixing structure of the flexible water blocking member which can ensure sufficient water blocking property against high water pressure etc. is desired.
The present invention is made in view of such prior art, and an object of the present invention is to provide a fixing structure of a flexible water blocking member capable of securing sufficient water blocking property against high water pressure and the like.

In order to achieve the above object, the fixing structure of the flexible water blocking member of the present invention is
A flexible water blocking member including an expansion and contraction portion that allows displacement, and a fixation portion that is extended to the expansion and contraction portion and provided at an end edge portion is applied to the adhesion portion via a pressing member. A fixing structure of a flexible water blocking member fixed to a joint portion of a structure, comprising:
The pressing member is provided with a friction increasing portion on a surface to be in contact with the welding portion.
It is characterized by

  It is preferable that the friction increasing portion of the pressing member includes a surface that contacts the pressing member by displacement and deformation of the flexible water blocking member.

The pressing member is provided on the surface of the pressing member in contact with the welding portion, the surface pressing member being pushed into the welding portion to increase the surface pressure.
It is preferable that the friction increasing portion be provided on the surface of the surface pressure member.

The friction increasing portion is a synthetic resin film formed on the surface;
It is preferable that the inorganic particles are provided on the synthetic resin film and partially exposed and embedded.

  It is preferable that the said friction increase part is comprised by the roughening process part provided with the uneven part formed in the said surface.

  It is preferable that the pressing member is provided with an insertion hole for an anchor bolt, and the anchor bolt penetrating the welding part is inserted into the insertion hole and fixed to the structure.

  The pressing member includes an insertion hole for an anchor bolt, and the anchor bolt disposed outside the end edge portion of the welding portion is inserted into the insertion hole, and the end edge portion of the welding portion It is preferable that the inner side is held and fixed to the structure.

  Preferably, the pressing member is fixed to the structure with one end portion of a fixing member tightened by an anchor bolt arranged outside the end edge portion of the welding portion.

The fixing structure includes a frame plate member that brings the welding portion into contact with the surface of the structure;
The frame plate member is provided with a friction increasing portion on a surface with which the welding portion contacts, and the bonding portion brought into contact with the friction increasing portion of the frame plate member is sandwiched by the pressing member and the structure It is preferable that it is fixed to an object.

  According to the present invention, it is possible to secure sufficient water barrier property against high water pressure and the like.

It is a fragmentary sectional view of one embodiment of fixation structure of a flexible water blocking member of the present invention, and a fragmentary perspective view and a sectional view of a control member. FIG. 7A is a partial cross-sectional view of another embodiment of the present invention and a cross-sectional view of a portion of the cross-sectional view. FIG. 7A is a partial cross-sectional view of an embodiment of the present invention in a state of being displaced upward or downward, and a cross-sectional view extracting a part. FIG. 7A is a partial cross-sectional view of another embodiment of the present invention and a cross-sectional view of a portion of the cross-sectional view. Each relates to an embodiment of the present invention and is a partial sectional view. It is sectional drawing of the pressing member of other one embodiment of this invention. It is a schematic explanatory drawing of a water pressure test device. It is explanatory drawing of the fixing structure of the conventional flexible water blocking member, and the schematic perspective view of the structure of application object.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
The fixing structure 10 of the flexible water blocking member of the present invention is used, for example, in place of the conventional fixing structure shown in FIG. 8 (a), and a structure made of concrete adjacent to the concrete structure 1 The flexible water blocking member 4 constructed between the joint portion 3 with the object 2 is a bolt hole of the welded portion 4 b of the flexible water blocking member 4 provided with the expandable portion 4 a on the anchor bolt 6 attached to the structure 1 And fixed by tightening the nut 8 through the presser plate 7.

  On the other hand, as shown in FIG. 1, the flexible water blocking member fixing structure 10 of the present invention is provided with an expandable portion 21 which allows displacement, and a fixing portion provided at an end edge portion extended to the expandable portion 21. In the fixing structure 10 of the flexible water blocking member, the flexible water blocking member 20 including the bonding portion 22 is fixed to the joint portion 3 of the structures 1 and 2 via the pressing member 30 that abuts on the bonding portion 22. The pressing member 30 is configured such that the friction increasing portion 32 is provided on the surface 31 to be in contact with the welding portion 22.

  For example, as shown in FIG. 1, the flexible water blocking member 20 to be fixed is formed in a short cylindrical shape with a flexible material such as rubber or a synthetic resin, and the stretchable portion 21 (FIG. It has the code | symbol 4a) and the fixation part 22 (refer code | symbol 4b of FIG. 8) for extension provided in the expansion-contraction part 21 and provided in the edge part. A bolt hole (not shown) through which the anchor bolt 6 is inserted is formed in the anchor portion 22.

  The flexible water blocking member 20 has one or more layers of reinforcing cloth (not shown) for reinforcement depending on the required strength. In addition, the flexible water blocking member 20 may be used by installing the reinforcing cloth so as to cover the outer side at the time of construction of the flexible water blocking member 20 without providing the reinforcing cloth in the inner layer.

  For example, as shown in FIG. 1, the expansion / contraction portion 21 that allows displacement has a substantially U-shaped cross-sectional shape, and one cross-sectional shape shown in FIG. 8 is an arc. What is formed and configured in a substantially Ω shape, or a configuration configured to meander in a substantially W shape in which a plurality of circular arc shapes (not shown) are continuous is used. Although not shown, the expansion and contraction portion 21 is formed as a hollow body, and a deformation margin is secured by the hollow portion. The shape is not limited at all, as long as the displacement resulting from the movement can be tolerated and the water can be stopped. The structures 1 and 2 are not limited to the box culvert shown in FIG. 8 but may be other structures, and can be widely applied to structures such as flexible sheet piles.

The welding portion 22 is a portion to be installed and fixed on the surface of the structure 1, and it may be a flat band shape or a short cylindrical shape that can be fixed, and its shape etc. is particularly limited like the stretchable portion 21. It is not a thing.
As shown in FIGS. 1 and 2, a bolt hole (not shown) for inserting the anchor bolt 6 is formed, and the anchor portion 22 is fixed by inserting the anchor bolt 6. Further, in the flexible water blocking members 20A and 20B, as shown in FIGS. 3 and 4, bolt holes for inserting the anchor bolt 6 are not formed in the fastening portions 22A and 22B, and the pressing member 30A is fastened. It may be fixed by applying to a part of 22A, or may be fixed by applying a pressing member 30B to the entire surface of the anchor portion 22B.

  In the flexible water blocking member 20A, as shown in FIG. 3, the anchor portion 22A protrudes so that the outer end edge portion thereof is separated from the surface of the structures 1 and 2 (horizontal plane in FIG. 3) The welding portion 22A is placed on and fixed to a vertical surface (vertical surface in FIG. 3) perpendicular to the surfaces of the structures 1 and 2. The hooking portion 22A is formed with a locking groove 23A for locking the pressing member 30A at an L-shaped crossing portion.

Further, as shown in FIG. 4, in the flexible water blocking member 20B, the ridge portion 23B which resists the detachment from the pressing member 30B is integrally formed on the anchoring portion 22B so as to protrude to the outer end of the end edge portion. For example, the cross-sectional shape is formed into a shape combining a substantially arc and a rectangle.
The shape of the ridges 23B is not limited to the case where the cross-sectional shape is a combination of a substantially arc and a rectangle, and although not shown, the trapezoidal shape or the top protrudes outside and the bottom side is located on the edge 22 It may be a triangular shape integrally formed, etc., and the shape is not limited at all, as long as the shape can resist the detachment from the pressing member 30B.
The specific fixing structure of the flexible water blocking members 20A and 20B will be described later.

  The pressing member 30 is made of a metal material, and for example, a flat steel such as SS400 is used. For example, in the fixing structure 10 shown in FIG. 1, a plurality of pressing members 30 are annularly arranged along the inner side of the structures 1 and 2, and flat steel or flat curved flat steel according to the shape of the structures 1 and 2. It is used after being formed into a shape. As shown in FIG. 1B, a plurality of insertion holes 33 for inserting the anchor bolt 6 are formed at predetermined intervals in the pressing member 30. The pressing member 30 is provided with a friction increasing portion 32 on the surface 31 to be in contact with the anchoring portion 22 of the flexible water stopping member 20, and between the pressing member 30 and the anchoring portion 22 of the flexible waterproof water stopping member 20. By increasing the coefficient of friction μ, the frictional resistance R, that is, the resistance R against the tensile force T applied in the direction of pulling out the welded portion 22 by the water pressure acting on the flexible water blocking member 20 is increased.

Until now, with respect to the tensile force T applied in the direction of pulling out the anchor portion 22 of the flexible water blocking member 20, the axial force P for tightening the pressing member 30 via the anchor bolt 6 is increased to increase the surface pressure. Thus, it has been practiced to increase the partial surface pressure P by reducing the area in contact with the welded portion 22 by welding the round bar to the pressing member 30 and projecting it out.
On the other hand, in the flexible water blocking member fixing structure 10, even if the axial force P for tightening the pressing member 30 via the anchor bolt 6 is constant, the bonding between the pressing member 30 and the flexible water blocking member 20 By increasing the coefficient of friction μ with the portion 22, the resistance R against the tensile force T applied in the pulling-out direction to the welded portion 22 acting on the flexible water blocking member 20 is increased.

That is, the resistance to the tensile force T of the anchor portion 22 of the flexible water stopping member 20 is R, and the coefficient of friction between the pressing member 30 and the anchoring portion 22 of the flexible water stopping member 20 is μ. Assuming that the force is P, the resistance R can be represented by R = μ · P.
In the previous method, a large resistance R was sought by increasing the axial force P with respect to the tensile force T, but in the fixing structure 10 of this flexible water blocking member, the coefficient of friction μ is By increasing the size, a large resistance R is obtained.
Thereby, even if the tensile force T acts on the flexible water blocking member 20 by high water pressure, the relationship of R> T is maintained such that the resistance R becomes large.

The friction increasing portion 32 is, for example, as shown in FIG. 1C, as the pressing member 30 with the surface 31 upside down and in contact with the welding portion 22 facing up, the synthetic resin film 32a and the synthetic resin film 32a. And inorganic particles 32b which are partially exposed and embedded.
The synthetic resin film 32a can be formed, for example, by melting it using a synthetic resin powder, and roughening the surface 31 of the pressing member 30 by sandblasting or the like and then coating it on the surface 31. The synthetic resin film 32a is not particularly limited as long as it can be embedded in a state in which the inorganic particles 32b provided on the synthetic resin film 32a are exposed.
The thickness of the synthetic resin film 32a is determined in consideration of workability and economy, and is, for example, in the range of 200 to 1000 μm, and preferably in the range of 300 to 400 μm. If it is too thin, it can not hold the inorganic particles 32b, and if it is too thick, the effect of increasing the coefficient of friction μ is limited and it is not economical.
The synthetic resin powder used for the synthetic resin film 32a to be applied to the surface 31 of the holding member 30 includes polyolefin resins such as low density polyethylene, high density polyethylene and polypropylene, polyamide resins such as nylon, saturated polyester resin, polyvinyl chloride, Thermoplastics such as polycarbonate and chlorinated polyether, and thermosetting plastics such as unsaturated polyester resin, epoxy resin, and fluorine resin can be mentioned.
In particular, in consideration of the environment in which the flexible water blocking member 20 is used, a saturated polyester resin film is preferable, and excellent corrosion resistance can be secured.

Examples of the inorganic particles 32b include silica, sand, ceramic, aluminum, zinc, iron and the like, and a material having high hardness and excellent wear resistance is preferable.
As mentioned above, since the friction force increasing effect of the friction increasing portion 32 of the present invention is brought about by the inorganic particles 32b being exposed on the synthetic resin film 32a, regarding the inorganic particles 32b, It is necessary to adjust the range of the particle size according to the thickness of the synthetic resin film 32a. That is, when the pull-out force is applied to the welded portion 22 of the flexible water blocking member 20, the inorganic particles 32b are exposed without being completely buried in the synthetic resin film 32a, and the inorganic particles 32b It is necessary to satisfy both of the two conditions that the inorganic particles 32b are not separated from the synthetic resin film 32a by the moment applied to the tip.
Although the thickness of the synthetic resin film 32a is in the range of 200 to 1000 μm, for example, in the case where the thickness of the synthetic resin film 32a is 300 μm, the range of 1/6 to 7 times the thickness of the synthetic resin film 32a The thing of 0.3 to 3.4 times the thickness of the synthetic resin film 32a is desirable among them.
As the inorganic particles 32b, it is possible to use one kind or a mixture of two or more kinds of the inorganic particles 32b in the range of the particle diameter of these.
Depending on the material used, the inorganic particles 32b may include those that are refined in a process such as mixing, and the finely divided inorganic particles 32b may be included, and the particles are refined The inorganic particles 32b are not included in the above range of particle sizes.

  For example, a fluid immersion method can be used to form the friction increasing portion 32 on the surface 31 of the pressing member 30. After the heated pressing member 30 is immersed in the immersion tank in which the synthetic resin powder is allowed to flow, the film in the molten state is formed by pressing and adhering to the inorganic powder particles and embedding the film. That is, after the synthetic resin powder coating is applied to the surface 31 of the pressing member 30 to form a molten film, the friction increasing portion 32 is formed while the synthetic resin film 32a is still in a molten state. The inorganic particles 32b are pressure-bonded or sprayed onto the upper side, and the inorganic particles 32b are embedded such that a part of the inorganic particles 32b is exposed from the synthetic resin film 32a.

  Further, further powder coating may be applied to the surface of the synthetic resin film 32a in a state where the inorganic particles 32b are partially exposed from the surface, thereby newly synthesizing between the inorganic particles 32b. The resin film 32a is formed, the inorganic particles 32b are more firmly embedded and held in the synthetic resin film 32a, and the thickness of the film is increased, whereby the corrosion resistance can also be improved.

  In addition to the fluid immersion method, other powder coating methods can be used, and after the synthetic resin powder paint is sprayed and electrostatically attached to the surface 31 of the holding member 30 which is negatively charged and grounded, the holding member 30 is Into the heating furnace to melt the deposited synthetic resin powder coating to form a molten film of uniform thickness, or spray spraying onto the surface 31 of the pressing member 30 while melting the synthetic resin powder coating by flame. A law etc. can also be used.

In addition to the case where the friction increasing portion 32 is formed by the above-described synthetic resin film 32a and the inorganic particles 32b, as shown in FIG. The roughened portion 32A may be provided.
The roughened portion 32A is formed by roughening the metal surface 31 of the pressing member 30 by, for example, shot blasting or grit blasting.
When the synthetic resin film 32a and the inorganic particles 32b are used in the roughened portion 32A, the inorganic particles 32b having an average particle diameter of 1/3 or more of the thickness of the synthetic resin film 32a are 1 / from the surface. As long as the thickness of the synthetic resin film 32a is set to 200 μm, for example, it is sufficient if the thickness of the synthetic resin film 32a is set to 22 μm. Therefore, the roughened portion 32A having a surface roughness RZ of 25 μm or more and a rust removal degree of Sa2 or more is formed.
Here, the surface roughness RZ is a parameter in the height direction called maximum height, and is the sum of the highest portion (Rp) and the deepest portion (Rv) within the range of the reference length of the cross-sectional curve. It can be determined by the value.
Also in the case where such a friction increasing portion 32 is configured by the roughened portion 32A, the axial force P for tightening the pressing member 30 via the anchor bolt 6 similarly to the fixing structure 10 of the flexible water blocking member described above. Of the flexible water blocking member 20 by increasing the friction coefficient μ between the pressing member 30 and the bonding portion 22 of the flexible water blocking member 20. The resistance R against the tensile force T applied in the pull-out direction can be increased.
Thereby, even if the tensile force T acts on the flexible water blocking member 20 by high water pressure, the relationship of R> T can be maintained such that the resistance R becomes large.

The construction of the fixing structure 10 of such a flexible water blocking member, as shown in FIG. 1, mounts the anchor bolts 6 at predetermined intervals (arrangement) on the inner surface sandwiching the joint portion 3 of the structures 1 and 2 Keep it.
Based on the spacing and arrangement of the anchor bolts 6, bolt holes (not shown) through which the anchor bolts 6 are inserted are formed in the anchoring portion 22 of the flexible water blocking member 20. Further, a plurality of pressing members 30 having a predetermined length are prepared, and insertion holes 33 through which the anchor bolts 6 are inserted are formed in the attachment portion 22 of each pressing member 30 in accordance with the arrangement of the anchor bolts 6.
After the preparation is completed, a water blocking material such as butyl rubber is disposed on the surfaces of the structures 1 and 2 as necessary, and the anchor bolt 6 is inserted into the bolt hole of the anchor portion 22 of the flexible water blocking member 20. Then, the insertion hole 33 of the pressing member 30 is inserted into the anchor bolt 6 so as to press the anchor portion 22.
Thereafter, a washer and a nut 8 are attached to the outer side of the pressing member 30, and the flexible water blocking member 20 is fixed by tightening the anchor bolt 6.
Further, the fastening portion 22 of the flexible water blocking member 20 is repeatedly tightened to each anchor bolt 6 via the pressing member 30 to complete the fixing.

According to the fixing structure 10 of the flexible water blocking member, even if the axial force P applied to the anchor bolt 6 is the same as before, the surface 31 of the pressing member 30 and the anchor portion 22 of the flexible water blocking member 20 Since it is tightened in a state in which the friction increasing portion 32 and the roughened portion 32A of the pressing member 30 are interposed between them, the resistance to the tensile force T applied to the flexible water blocking member 20 by the increased friction coefficient μ R becomes large, and it is possible to prevent water withdrawal when high water pressure is applied, and to ensure water shut-off.
Thus, when the tensile force T applied to the flexible water blocking member 20 is set to the same value as before, the coefficient of friction μ is increased in the friction increasing portion 32 and the roughened portion 32A of the surface 31 of the pressing member 30. The presser member 30 can be made thinner by the same amount or the clamping force by the anchor bolt 6 can be made smaller for the presser member 30 of the same thickness, and the anchor bolt 6 can be made thinner or the installation interval can be increased. It becomes.

  In addition, when replacing the existing flexible water blocking member 20, by using the friction increasing portion 32 or the roughened portion 32A formed on the surface of the pressing member 30 in contact with the welded portion 22, this is used. The resistance R against the tensile force T applied to the flexible water blocking member 20 is increased by an amount corresponding to the increase of the friction coefficient μ of the friction increasing portion 32 and the roughened portion 32A only by tightening with the same axial force P as before. Can improve water fastness.

Next, another embodiment of the present invention will be described with reference to FIG.
In the fixing structure 10A of the flexible water blocking member of the present embodiment, the mounting groove portion 1A of the flexible water stopping member 20 is formed at the corner between the surface of the structure 1 and the joint portion 3 and the mounting groove portion 1A is flexible. By installing the water blocking member 20, the amount of protrusion to the inside of the flow path is reduced to prevent the flow path from being narrowed.
In the fixing structure 10A of the flexible water blocking member, the frame plate member 40 is disposed so as to cover the surface of the mounting groove portion 1A of the structure 1. The frame plate member 40 is formed into a short cylindrical shape by bending a steel material, and based on the cross-sectional shape of the display state in FIG. The first vertical portion 42 covering the first and second vertical portions 43 covering the joint portion 3 and the second vertical portion 43 parallel to the joint portion 3 are integrally formed.

In the frame plate member 40, a bolt hole (not shown) for inserting the anchor bolt 6 is formed in the horizontal middle horizontal portion 41 so that the anchor bolt 6 can be inserted.
On this frame plate member 40, the surface 41a of the horizontal middle horizontal portion 41 in the cross sectional shape and a portion of the flexible water blocking member of the first vertical portion 42 based on the cross sectional shape in the display state in FIG. The welding portion 22 of the flexible water blocking member 20 is brought into contact with and attached to the surface 42 a in contact with the end face of the welding portion 22. Therefore, the frame plate member 40 has a surface 41a in contact with the welding portion 22 of the horizontal middle horizontal portion 41 and a surface 42a in contact with the end face of the welding portion 22 of a part of the first vertical portion 42. Is provided.
The friction increasing portion 44 is configured the same as the friction increasing portion 32 of the pressing member 30 described above. The friction increasing portion 44 may be configured by the roughened portion 32A.

In the fixing structure 10A of the flexible water blocking member provided with such a frame plate member 40, for example, the structure 1 is assembled in advance together with the anchor bolt 6 by using the frame plate member 40 as a form for casting concrete Concrete is cast and constructed.
The anchor bolt 6 protruding from the frame plate member 40 covering the surface of the mounting groove portion 1A of the structure 1 is, like the fixing structure 10 of the flexible water blocking member described above, the anchored portion of the flexible water blocking member 20 The bolt holes 22 are inserted, and the insertion holes 33 of the pressing member 30 are inserted into the anchor bolt 6 so as to sandwich and press the anchor portion 22.
Thereafter, a washer and a nut 8 are attached to the outside of the pressing member 30 and tightened to the anchor bolt 6 so that the flexible water blocking member 20 is sandwiched between the pressing member 30 and the frame plate member 40 and fixed.
Further, the fastening portion 22 of the flexible water blocking member 20 is repeatedly tightened to each anchor bolt 6 via the pressing member 30 so that the flexible water blocking member 20 is sandwiched between the pressing member 30 and the frame plate member 40 and fixed. Is complete.

According to the flexible water blocking member fixing structure 10A, the friction increasing portion 32 of the pressing member 30 is interposed between the surface 31 of the pressing member 30 and the hooking portion 22 of the flexible water blocking member 20. While the friction increasing portion 44 of the surface 41a of the middle horizontal portion 41 of the frame plate member 40 and the surface 42a of the first vertical portion 42 is interposed in the anchor portion 22 of the flexible water blocking member 20 Be
As a result, the hooked portion 22 of the flexible water blocking member 20 is sandwiched between the friction increasing portions 32 and 44 on both the front and back sides, and is added to the flexible water blocking member 20 by an increase in the friction coefficient μ on the front and back. The resistance R against the tensile force T is further increased, and it is possible to prevent the pullout when a high water pressure is applied, and to ensure a more excellent water barrier property.
Therefore, even if the axial force P applied to the anchor bolt 6 is the same as before, between the surface 31 of the pressing member 30 and the surfaces 41a and 42a of the frame plate member 40 and the welded portion 22 of the flexible water blocking member 20. When the friction increasing portions 32, 44 are interposed and the tensile force T applied to the flexible water blocking member 20 is set as before, the surface 31 of the pressing member 30 and the surface 41a of the frame plate member 40 are provided. , 42a, the thickness of the pressing member 30 can be reduced by an amount corresponding to the increase of the friction coefficient μ in the friction increasing portions 32, 44, or the clamping force by the anchor bolt 6 can be reduced for the pressing member 30 of the same thickness. It is also possible to make the bolt 6 thin and to increase the installation interval.

Further, when replacing the existing flexible water blocking member 20, when constructing the mounting groove portion 1A of the structure 1, the frame plate member 40 provided with the friction increasing portion 44 is used, and the surface of the pressing member 30 is By forming the friction increasing portion 32 at 31, the flexible water blocking member 20 can be obtained by increasing the friction coefficient μ of the friction increasing portions 32 and 44 simply by tightening with the same axial force P as before. The resistance R against the applied tensile force T can be further increased, and the water fastness can be further improved.
The friction increasing portion 44 may be configured by the roughened portion 32A, and similarly, the friction coefficient μ can be increased.

Next, another embodiment of the present invention will be described with reference to FIG.
In the fixing structure 10B of the flexible water blocking member of the present embodiment, a configuration in which the anchor bolt 6 is disposed in parallel with the central axis direction of the structure 1 and a bolt hole is formed in the welded portion 22A of the flexible water blocking member 20A. This configuration is different from the fixing structure 10A of the flexible water blocking member described above in a configuration in which a part of the anchor portion 22A is fixed by being pinched by the pressing member 30A.
In the structure 1, as shown in FIG. 3, the mounting groove portion 1A of the flexible water blocking member 20 is formed in the corner between the surface and the joint portion 3, and the flexible water blocking member 20A is installed in the mounting groove portion 1A. Thus, the amount of protrusion to the inside of the flow path is reduced to prevent the flow path from being narrowed.
In the fixing structure 10B of the flexible water blocking member, the frame plate member 40 is disposed so as to cover the surface of the mounting groove portion 1A of the structure 1. The frame plate member 40 has the same configuration as that of the fixed structure 10A described above, and the friction increasing portion 44 is provided on the surface 41a of the horizontal middle horizontal portion 41 and the surface 42a of the first vertical portion 42 of the frame plate member 40. It is formed.
The frame plate member 40 has an insertion hole (not shown) for inserting the anchor bolt 6 in the first vertical portion 42. The friction increasing portion 44 may be configured by the roughened portion 32A.

  As shown in FIG. 3, the flexible water blocking member 20A does not form a bolt hole for inserting the anchor bolt 6 in the anchoring portion 22A, but applies the pressing member 30A to a part of the anchoring portion 22A. It is fixed. The anchor portion 22A is formed in an L shape with its outer end edge protruding away from the surface of the structure 1 (horizontal plane in FIG. 3), and a vertical surface (figure in the figure perpendicular to the surface of the structure 1) The fixing portion 22A is placed on and fixed to the vertical surface in 3). The hooking portion 22A is formed with a locking groove 23A for locking the pressing member 30A at an L-shaped crossing portion.

In the cross-sectional shape of the holding member 30A shown in FIG. 3, the insertion hole 33A of the anchor bolt 6 is formed, and the vertical holding portion 30a, which is inside the insertion hole 33A against the end of the hook 22A, is perpendicular A horizontally projecting portion 30b is provided extending to the upper end of the pressing portion 30a and protruding toward the first vertical portion 42 of the frame plate member 40 to prevent inclination due to tightening, and extending in a substantially L shape at the lower end of the vertical pressing portion 30a A locking projection 30d formed on the end portion of the horizontal pressing portion 30c on the structure 1 side to be locked to the locking groove 23A of the anchoring portion 22A .
In the pressing member 30A, the friction increasing portion 32 is provided on the surface 34 of the vertical pressing portion 30a inside the insertion hole 33A, the surface 34 of the locking projection 30d following the surface 34, and the surface 34 of the horizontal pressing portion 30c. In the pressing member 30A, the friction increasing portion 32 is provided not only on the surface of the flexible water blocking member 20A in contact with the wedged portion 22 before deformation but also on the surface on which the pressing member 30A contacts due to displacement / deformation.
The friction increasing portion 32 may be configured by the roughened portion 32A.

In the fixing structure 10B of such a flexible water blocking member, for example, the structure 1 is assembled in advance together with the anchor bolt 6 by using the frame plate member 40 as a mold for casting concrete, and concrete is cast Configured
The anchored portion 22A of the flexible water blocking member 20A is disposed under the anchor bolt 6 projecting horizontally from the frame plate member 40 covering the surface of the attachment groove portion 1A of the structure 1, and the end of the anchored portion 22A The insertion hole 33A of the pressing member 30A is inserted into the anchor bolt 6 so as to press the inside of the portion. At the same time, the locking projection 30d of the pressing member 30A is locked in the locking groove 23A of the hooking portion 22A.
Thereafter, a washer and a nut 8 are attached to the outside of the pressing member 30A and tightened to the anchor bolt 6, so that the flexible water blocking member 20A is sandwiched and fixed by the pressing member 30A and the frame plate member 40.
Furthermore, the fastening portion 22A of the flexible water blocking member 20A is repeatedly tightened to each anchor bolt 6 via the pressing member 30A, and the flexible water blocking member 20A is fixed by being sandwiched between the pressing member 30A and the frame plate member 40. Is complete.
In this initial state (not shown), the fastening portion 22A of the flexible water blocking member 20A is not in contact with the surface 41a of the middle horizontal portion 41 of the frame plate member 40.
In FIG. 3A after displacement, the flexible water blocking member 20A is in a state of being displaced upward on the paper surface, and is in contact with the horizontal pressing portion 30c of the pressing member 30A.
Further, in FIG. 3B after displacement, the flexible water blocking member 20A is in a state of being displaced downward on the paper surface, and contacts the surface 41a of the middle horizontal portion 41 of the frame plate member 40.

According to the flexible water blocking member fixing structure 10B, when the flexible water blocking member 20A is displaced upward in the drawing of FIG. 3, the surface 34 of the vertical pressing portion 30a inside the insertion hole 33A of the pressing member 30A. And, the surface 34 of the locking convex portion 30d following the surface 34 and the friction increasing portion 32 of the surface 34 of the horizontal pressing portion 30c are interposed between it and the anchor portion 22A of the flexible water blocking member 20A. . Further, the friction increasing portion 44 of the surface 42a of the first vertical portion 42 of the frame plate member 40 is tightened in a state where it is interposed by the welded portion 22A of the flexible water blocking member 20A.
As a result, the anchor portion 22A of the flexible water blocking member 20A is in a state in which both the front and back sides arranged vertically are sandwiched between the friction increasing portions 32, 44, and the flexible stop by the increase in the friction coefficient μ on the front and back The resistance R against the tensile force T applied to the water member 20A is further increased, and it is possible to prevent the withdrawal when the high water pressure acts, and to ensure the more excellent water stopping property. The resistance by the displacement of the hooked portion 22A of the flexible water blocking member 20A and the friction increasing portion 32 of the surface 34 of the horizontal pressing portion 30c of the pressing member 30A also acts.
Therefore, even if the axial force P applied to the anchor bolt 6 is the same as before, the surface 34 of the vertical pressing portion 30a of the pressing member 30A, the surface 34 of the locking projection 30d following this surface 34, and the horizontal pressing portion 30c. The friction increasing portions 32, 44 are interposed between the surface 34 and the bonding portion 22A of the flexible water blocking member 20A of the surface 42a of the first vertical portion 42 of the frame plate member 40, and the water blocking When setting the tensile force T applied to the member 20A in the same manner as the above, the friction increasing portion 32 and the frame plate of each surface 34 of the vertical pressing portion 30a, the locking convex portion 30d and the horizontal pressing portion 30c of the pressing member 30A. The presser member 30A is made thinner by an amount corresponding to an increase in the coefficient of friction μ at the friction increasing portion 44 of the surfaces 41a and 42a of the member 40, or the presser member 30A having the same thickness is tightened by the anchor bolt 6 The can be reduced, or as thin anchor bolt 6, it is possible to increase the installation interval.

Further, when the flexible water blocking member 20A is displaced downward in the paper surface of FIG. 3, the surface 34 of the vertical pressing portion 30a inside the insertion hole 33A of the pressing member 30A and the locking convex portion 30d following the surface 34. It will be in the state where friction increase part 32 of surface 34 was interposed between welding part 22A of flexible water-stop member 20A. Further, the friction-increasing portion 44 of the surface 41a of the middle horizontal portion 41 of the frame plate member 40 and the surface 42a of the first vertical portion 42 is tightened in a state where it is interposed by the wedging portion 22A of the flexible water blocking member 20A.
As a result, the anchor portion 22A of the flexible water blocking member 20A is in a state in which both the front and back sides arranged vertically are sandwiched between the friction increasing portions 32, 44, and the flexible stop by the increase in the friction coefficient μ on the front and back The resistance R against the tensile force T applied to the water member 20A is further increased, and it is possible to prevent the withdrawal when the high water pressure acts, and to ensure the more excellent water stopping property. Resistive force is also exerted by the displacement of the hooked portion 22A of the flexible water blocking member 20A with the friction increasing portion 44 of the surface 41a of the middle horizontal portion 41 of the frame plate member 40.
Therefore, even if the axial force P applied to the anchor bolt 6 is the same as before, the surface 34 of the vertical pressing portion 30a of the pressing member 30A and the surface 34 of the locking projection 30d following the surface 34 and the frame plate member 40 The friction increasing portions 32, 44 are interposed between the surface 42a and the anchor portion 22A of the flexible water blocking member 20A, and the tensile force T applied to the flexible water blocking member 20A is set as before. In this case, the presser member 30A is made thinner by an amount corresponding to the increase of the friction coefficient μ at the surface 31 of the presser member 30A and the surface 32a of the frame plate member 40 or the presser member 30A of the same thickness. On the other hand, the tightening force by the anchor bolt 6 can be reduced, and the anchor bolt 6 can be made thin and the installation interval can be increased.

Further, when replacing the existing flexible water blocking member 20A, when constructing the mounting groove portion 1A of the structure 1, the frame plate member 40 provided with the friction increasing portion 44 is used, and the friction in the pressing member 30A By using the increase portion 32 formed, the tensile force applied to the flexible water blocking member 20A by the amount by which the friction coefficient μ of the friction increase portions 32, 44 is increased only by tightening with the same axial force P as before. The resistance R against T can be further increased, and the water barrier property can be further improved.
The friction increasing portions 32 and 44 may be configured by the roughened portion 32A, and the friction coefficient μ can be similarly increased.

Next, another embodiment of the present invention will be described with reference to FIG.
In the flexible water blocking member fixing structure 10C of the present embodiment, when pressing the hooking portion 22B of the flexible water blocking member 20B with the pressing member 30B, the anchor 30 does not directly press the pressing member 30B. It is configured to be fixed via the fixing member 50 fixed by the bolt 6. This eliminates the need for drilling holes for the anchor bolt in the flexible water blocking member 20B and the pressing member 30B in accordance with the arrangement of the anchor bolt 6, thereby facilitating preparation before construction.
In the flexible water blocking member fixing structure 10C, as shown in FIG. 4, the flexible water blocking member 20B has a ridge portion 23B at its end edge portion that resists detachment from the pressing member 30B at the anchoring portion 22B. It is integrally formed so as to protrude to the outer end, and for example, the cross-sectional shape is formed into a shape combining a substantially arc and a rectangle.
The shape of the ridges 23B is not limited to the case where the cross-sectional shape is a combination of a substantially arc and a rectangle, as described above, and although not shown, the trapezoidal shape or the top protrudes outward and the base is The shape may be a triangular shape etc. which were located on the edge adhesion part 22B and formed integrally, and the shape is not limited at all, as long as it is a shape that can resist the detachment from the pressing member 30B. good.

The pressing member 30B is configured to be formed in a substantially U-shaped lip groove shape whose upper side is opened in the cross-sectional shape shown in FIG. The weight can be reduced to about 1/3 while securing the same rigidity as compared with the case where the cross-sectional shape of the lip groove shape is made flat.
The pressing member 30B may be reinforced by interposing, for example, a rectangular parallelepiped reinforcing member substantially the same as the groove depth or a C-shaped steel reinforcing member having a U-shaped cross section in the groove.
The pressing member 30B clamps the fixing member 50 with the anchor bolt 6 disposed on the outside of the hooking portion 22B of the flexible water blocking member 20B without directly fixing the structure 1 with the anchor bolt 6. The pressing member 30B is fixed via the

  The fixing member 50 is provided with an intermediate plate-like portion 51 fixedly inserted and fixed by the anchor bolt 6 so that bolt holes (not shown) for the anchor bolt 6 are formed and both sides of the intermediate plate-like portion 51 are bent inward The side plate portion 52 is formed by bending. The pressing arm portion 53 for pressing the pressing member 30B is formed to project from the tip end of each side plate portion 52, and the same end face is separated from the intermediate plate-like portion 51 at each base end portion of each side plate portion 52. The elastic contact part 54 which protrudes inward so that it may be contact | abutted to the empty structure 1 is integrally formed, and is comprised. In the fixing member 50, the protruding length of the pressing arm 53 is substantially the same as the groove width of the pressing member 30B, and the tip end of the pressing arm 53 slightly protrudes outside the pressing member 30B. . Thereby, even if the flexible water blocking member 20B is largely displaced, the interference between the fixing member 50 and the flexible water blocking member 20B and the mutual damage can be prevented.

In the fixing member 50, a locking projection 55 is formed on the lower surface of the pressing arm 53 so as to be protruded and locked in the groove of the pressing member 30B, and the locking projection 55 corresponds to the groove width of the pressing member 30B. It has substantially the same size and can be locked before and after the locking protrusion 55.
The amount of projection of the locking projection 55 may be such that the pressing member 30B does not move due to the displacement of the flexible water blocking member 20B.
Further, when the fixing member 50 clamps the distance from the lower surface of the middle plate 51 to the lower surface of the pressing arm 53 of the side plate 52 (corresponding to the height of the side plate) to the anchor bolt 6, the pressing member 30B It is set so that the surface pressure necessary to press-bond the welded portion 22B of the flexible water blocking member 20B to the structure 1 can be generated.

Further, the pressing member 30B has a friction increasing portion 32 formed on the outer surface 31B of the bottom opposite to the opening. The configuration of the friction increasing portion 32 is the same as the friction increasing portions 32 and 44 described above.
The pressing member 30B increases the coefficient of friction μ between the pressing member 30B and the anchor portion 22B of the flexible water blocking member 20B, thereby causing friction by the frictional resistance, that is, the pressure by the water pressure acting on the flexible water blocking member 20B. The resistance R against the tensile force T applied in the direction of pulling out the attached portion 22B is increased.
The friction increasing portion 32 may be configured by the roughened portion 32A, and the friction coefficient μ can be similarly increased.

Next, in the flexible water blocking member fixing structure 10C using such a pressing member 30B and the fixing member 50, the flexible water blocking member 20B, the pressing member 30B and the fixing member 50 are manufactured in advance in a factory At the site, the anchor bolt 6 is implanted in the structure 1 which is the outside of the anchor portion 22B of the flexible water blocking member 20B.
After the preparation is completed in this way, a water blocking material such as butyl rubber is disposed on the surfaces of the structures 1 and 2 as necessary, and the pressing member 30B is disposed to press the anchored portion 22B of the flexible water blocking member 20B. Do.
Thereafter, the anchor bolt 6 is inserted into the bolt insertion hole of the intermediate plate 51 of the fixing member 50, and the pressing arm 53 of the fixing member 50 is positioned at the opening of the pressing member 30B. Then, a washer and a nut 8 are attached to the outside of the anchor bolt 6 inserted into the fixing member 50 and tightened to clamp the pressing member 30B via the fixing member 50 and fix the flexible water blocking member 20B.
In this manner, the fastening of the fixing member 50 to each anchor bolt 6 is repeated, and the fixing of the sheathing portion 22B of the flexible water blocking member 20B is completed by the pressing member 30B via the fixing member 50.

According to the fixing structure 10C of the flexible water blocking member, even if the axial force P applied to the anchor bolt 6 is the same as before, the surface 31B of the pressing member 30B and the welded portion 22B of the flexible water blocking member 20B Since it is tightened in a state where the friction increasing portion 32 of the pressing member 30B is interposed therebetween, the resistance R against the tensile force T applied to the flexible water blocking member 20B is increased by an amount corresponding to the increase of the friction coefficient μ. It is possible to prevent water withdrawal when water pressure acts, and to secure water blocking.
Thus, when setting the tensile force T applied to the flexible water blocking member 20B in the same manner as before, the pressing member 30B is increased by the amount by which the friction coefficient μ is increased in the friction increasing portion 32 of the surface 31B of the pressing member 30B. For the pressing member 30B having the same thickness, the clamping force by the anchor bolt 6 can be reduced, the anchor bolt 6 can be made thin, and the installation interval can be increased.
Further, since the pressing member 30B is tightened via the fixing member 50 without directly tightening the anchor bolt 6, it is necessary to manufacture the pressing member 30B and the flexible water blocking member 20B in accordance with the arrangement of the anchor bolt 6. It can be manufactured easily, and the construction period required for construction can be shortened.

In addition, when replacing the existing flexible water blocking member 20B, the same shaft as before can be obtained by using the friction increasing portion 32 formed on the surface 31B in contact with the welding portion 22B of the pressing member 30B. Only by tightening with the force P, the resistance R against the tensile force T applied to the flexible water blocking member 20B can be increased by an amount corresponding to the increase of the friction coefficient μ of the friction increasing portion 32, and the water blocking performance can be improved. .
The friction increasing portion 32 may be configured by the roughened portion 32A, and the friction coefficient μ can be similarly increased.

Next, another embodiment of the present invention will be described with reference to FIG.
In the flexible water blocking member fixing structure 10D of the present embodiment, the configuration of the pressing member 30C is different, and the pressing member 30C is pushed into the anchor portion 22 of the flexible water blocking member 20 to increase the surface pressure. A surface pressure member 36 is provided.
The pressing member 30C is formed of a metal plate such as a steel plate divided into a plurality of pieces in the circumferential direction of the joint portion 3, and the plurality of pressing members 30C are annularly disposed on the bonding portion 22 of the flexible water blocking member 20. .
In the pressing member 30C, a plurality of bolt insertion holes 33 are formed at a central portion in the width direction at predetermined intervals in the longitudinal direction of the pressing member 30C, and the width direction of the surface of the pressing member 30C facing the binding part 22 In the above, two surface pressure members 36 are provided on both sides sandwiching the insertion hole 33. The surface pressure member 36 is made of, for example, round steel, and is fixed by welding the outer peripheral sides thereof to the surface 31 of the pressing member 30C.
As shown in FIG. 5A, a friction increasing portion 32 is provided on the surface of the surface pressure member 36 of the pressing member 30C. The friction increasing portion 32 is configured the same as the friction increasing portion 32 described above. Further, the friction increasing portion 32 may be configured by the roughened portion 32A.
In addition to the surface of the surface pressure member 36, as shown in FIG. 5B, the pressure member 30C may be provided with the friction increasing portion 32 also on the surface 31 of the pressure member 30C.
Further, in the fixing structure 10 D of the flexible water blocking member, the frame plate member 40 is disposed so as to cover the surface of the mounting groove portion 1 A of the structure 1. The frame plate member 40 is the same as the frame plate member 40 installed in the flexible water blocking member fixing structure 10A described above, so the same reference numerals will be given to the same portions, and overlapping descriptions will be omitted.
In the frame plate member 40 in this case, as shown in FIG. 5, the formation of the friction increasing portion on the frame plate member 40 may be omitted. However, as shown in FIG. The surface 41a of the horizontal middle horizontal portion 41 in contact with the anchoring portion 22 of the flexible water blocking member 20 and the surface 42a of the first vertical portion 42 in contact with the end face of the anchoring portion 22 (See FIG. 2) may be provided. The friction increasing portion 44 is configured the same as the friction increasing portion 32 of the pressing members 30 and 30C described above.

In the case of a pressing member 30C provided with such a surface pressure member 36 and having the friction increasing portion 32 formed on the surface of the surface pressing member 36 and / or the surface 31 of the pressing member 30C, the welded portion 22 of the flexible water blocking member 20 The anchor bolt 6 is inserted into the bolt hole, and the insertion hole 33 of the pressing member 30C is inserted into the anchor bolt 6 so as to sandwich and press the anchor portion 22.
Thereafter, a washer and a nut 8 are attached to the outside of the pressing member 30C and tightened to the anchor bolt 6, thereby sandwiching and fixing the flexible water blocking member 20 between the pressing member 30C and the frame plate member 40.
Further, the fastening portion 22 of the flexible water blocking member 20 is repeatedly tightened to each anchor bolt 6 via the pressing member 30C, and the flexible water blocking member 20 is fixed by being sandwiched between the pressing member 30C and the frame plate member 40. Is complete.

In the holding member 30C thus tightened, as a result of the surface pressure member 36 of the holding member 30C being pushed into the hooking portion 22, the meat of the hooking portion 22 of the pushed-in portion is raised on both sides of the surface pressure member 36 Forms a kind of ridge, and two ridges of flexible water blocking member 20 are formed on both sides of the pressing member 30C in the width direction of the pressing member 30C (axial direction of the flexible water blocking member 20) As a result, the surface pressure on the surface of the welded portion 22 can be increased, and the water blocking effect can be improved.
In addition to this, since the friction increasing portion 32 is provided on the surface of the surface pressure member 36, the state in which the friction increasing portion 32 is interposed between the surface pressure member 36 and the welded portion 22 of the flexible water blocking member 20 When the surface pressure P is increased, the coefficient of friction μ also increases, and the synergetic effect of the increase in the surface pressure P and the increase in the coefficient of friction μ makes the resistance R against the tensile force T applied to the flexible water blocking member 20 Can be prevented, and it is possible to prevent the withdrawal when a high water pressure acts and to ensure a more excellent water barrier property.

Although not illustrated in FIG. 5, as described in FIG. 2, if the frame plate member 40 is provided with the friction increasing portion 44, the surface 41 a of the middle horizontal portion 41 of the frame plate member 40 and the first vertical It is tightened in a state where the friction increasing portion 44 of the surface 42 a of the portion 42 is interposed in the anchor portion 22 of the flexible water blocking member 20. As a result, in addition to the effect of the increase in surface pressure, the bonding portion 22 of the flexible water blocking member 20 is sandwiched between the friction increasing portions 32 and 44 on both the front and back sides, and the friction coefficient μ is increased on the front and back sides. The resistance R against the tensile force T applied to the flexible water blocking member 20 is further increased, and it is possible to prevent the withdrawal when the high water pressure acts, and to ensure the more excellent water blocking property.
Therefore, according to the fixing structure 10D of the flexible water blocking member, even if the axial force P applied to the anchor bolt 6 is the same as before, the surface pressure member 36 of the pressing member 30C and the friction increasing portion 32 of the surface thereof The presser member 30C can be made thinner by the amount by which the pressure P and the coefficient of friction μ are increased, or the clamping force by the anchor bolt 6 can be made smaller for the presser member 30C of the same thickness. It also becomes possible to increase the installation interval.

  Further, by providing the surface pressure member 36, it is possible to prevent the material of the flexible water blocking member 20, such as rubber, from flowing in the axial direction of the flexible water blocking member 20 and thinning the adhesion portion 22. The water stop can be maintained more reliably.

In addition, when replacing the existing flexible water blocking member 20, when constructing the mounting groove portion 1A of the structure 1, the frame plate member 40 provided with the friction increasing portion 44 is used, and the surface of the pressing member 30C By providing the surface pressure member 36 on the surface 31 and forming the friction increasing portion 32 on the surface, the surface pressure member 36 can increase the surface pressure simply by tightening with the same axial force P as before. The resistance R against the tensile force T applied to the flexible water blocking member 20 can be further increased by an amount corresponding to the increase of the friction coefficient μ of the friction increasing portions 32, 44, and the water blocking property can be further improved.
The friction increasing portions 32 and 44 may be configured by the roughened portion 32A, and the friction coefficient μ can be similarly increased.

Next, an embodiment of the fixing structure 10 of the flexible water blocking member of the present invention will be described together with a comparative example.
In this example, the water resistance test by the friction increasing portion 32 was performed to confirm.
As shown in FIG. 5, the water pressure test was performed by preparing a water pressure test device 60 and preparing pressing members 30 of different surfaces for pressing the flexible water blocking member 20.
In the test, both sides of the flexible water blocking member 20 are held down by the test pressing member 30 and the other periphery is sealed, and water pressure is applied from inside by the pressure pump 61 and the water pressure is measured by the pressure gauge 62. The presence or absence of water leakage from the portion pressed by the pressing member 30 was examined.

(Example)
The friction increase portion 32 is formed by embedding the inorganic particles 32b of silica in the synthetic resin film 32a of saturated polyester as the friction increase portion 32 on the surface 31 (see FIG. 1) as the pressing member 30 so as to expose a part.
Water pressure is required from 0.05 MPa in a state where both sides of the rubber sheet are pressed by the pressing member 30 using a rubber sheet in which two reinforcing cloths are layered as the flexible water blocking member 20. The pressure was raised to 30 MPa, and the presence or absence of water leakage was visually observed.
As a result, even when the water pressure was increased to 0.30 MPa, which is required in design, no water leakage from the holding member 30 occurred.

(Comparative example 1)
The same as the embodiment except that the pressing member 30 is used in which the surface of the pressing member 30 is not subjected to any treatment is used.
As a result, when the water pressure was increased to 0.20 MPa, water leakage occurred from the pressing member 30.

(Comparative example 2)
Except for using the pressing member 30 in which only tar epoxy resin coating is applied to the surface of the pressing member 30, the same as the example is taken.
As a result, when the water pressure was increased to 0.15 MPa, water leakage occurred from the pressing member 30.

As described above in detail with the embodiment, according to the fixing structure 10 of the flexible water blocking member of the present invention, the stretchable portion 21 permitting displacement and the end edge portion extended to the stretchable portion 21 And a flexible water blocking member 20 including a fixing hooking portion 22 provided on the flexible water blocking member, which is fixed to the joint portion 3 of the structure 1 via the pressing member 30 applied to the hooking portion 22. In the fixing structure 10, the pressing member 30 has the friction increasing portion 32 provided on the surface 31 to be in contact with the anchoring portion 22, so that the surface 31 of the pressing member 30 and the flexible water blocking member 20 are welded. By tightening in a state in which the friction increasing portion 32 of the pressing member 30 is interposed between the pressing member 30 and the portion 22, the resistance R against the tensile force T applied to the flexible water blocking member 20 is large by the increased friction coefficient μ. Even if the axial force P applied to the anchor bolt 6 is the same as before It is possible to ensure the water-blocking to prevent withdrawal of the case where high water pressure is applied.
Thus, when setting the tensile force T applied to the flexible water blocking member 20 in the same manner as before, the pressing member 30 is increased by the amount by which the friction coefficient μ is increased in the friction increasing portion 32 of the surface 31 of the pressing member 30. Can be made thinner or the axial force (tightening force) P by the anchor bolt 6 can be made smaller for the pressing member 30 of the same thickness, the anchor bolt 6 can be made thinner, and the installation interval can be increased. Become.
In addition, when replacing the existing flexible water blocking member 20, the same axial force as before is obtained by using the friction increasing portion 32 formed on the surface of the pressing member 30 in contact with the welded portion 22. Only by tightening with P, the resistance R against the tensile force T applied to the flexible water blocking member 20 can be increased by an amount corresponding to the increase of the friction coefficient μ of the friction increasing portion 32, and the water blocking property can be improved.
In particular, it is not necessary to increase the rigidity of the holding member 30 and the anchor bolt 6 compared to the case where the tightening force by the holding member 30 is increased so far, and it is applied to fixation of the flexible water blocking member easily to improve water blocking can do.

  According to the flexible water blocking member fixing structure 10B of the present invention, the pressing member 30A is provided with the friction increasing portion 32 on the surface 34 which contacts the pressing member 30A by the displacement and deformation of the flexible water blocking member 20A. Therefore, not only the surface 31 of the pressing member 30A but also the friction increasing portion 32 of the surface 34 in contact with the flexible water blocking member 20A, the contact area is increased, the resistance against extraction can be increased, and the water fastness is further enhanced. be able to.

According to the fixing structure 10 of the flexible water blocking member of the present invention, the friction increasing portion 32 is provided on the synthetic resin film 32 a formed on the surface 31 of the pressing member 30 and on the synthetic resin film 32 a By being composed of the inorganic particles 32b to be embedded, it can be easily manufactured and the water fastness can be improved.
As a result, the resistance R against the tensile force T applied to the flexible water blocking member 20 is further increased by an amount corresponding to the increase in the friction coefficient μ, thereby preventing withdrawal when high water pressure acts to ensure further excellent water blocking performance. can do.

  According to the flexible water blocking member fixing structure 10D of the present invention, the pressing member 30C is pushed into the bonding portion 22 by the surface 31 of the pressing member 30C in contact with the bonding portion 22 to increase the surface pressure. 36 is provided, and the friction increasing portion 32 provided on the surface of the surface pressure member 36 causes the friction increasing portion 32 provided on the surface of the surface pressure member 36 to be a ridge of the surface pressure member 36 and the flexible water blocking member 20. In the state of being interposed between the attachment portion 22 and the surface pressure P, the coefficient of friction μ also increases, and the synergetic effect of the increase in the surface pressure P and the increase in the coefficient of friction μ The resistance R against the tensile force T applied to the member 20 is further increased, and it is possible to prevent the pulling out when the high water pressure is applied, and to ensure the more excellent water stopping property. Further, by providing the surface pressure member 36, the flexible material such as rubber constituting the flexible water blocking member 20 flows in the axial direction of the flexible water blocking member 20, and the adhesion portion 22 becomes thin. Can be prevented, and watertightness can be maintained more reliably.

According to the fixing structure 10 of the flexible water blocking member of the present invention, the friction increasing portion 32 is provided on the synthetic resin film 32a formed on the surface 31 and on the synthetic resin film 32a, and a part thereof is exposed and embedded. Since the inorganic particles 32b are formed, the friction increasing portion 32 can be easily formed on the surface of the pressing member 30, and the friction coefficient .mu. Can be increased.
As a result, the resistance R against the tensile force T applied to the flexible water blocking member 20 is further increased by an amount corresponding to the increase in the friction coefficient μ, thereby preventing withdrawal when high water pressure acts to ensure further excellent water blocking performance. can do.

According to the fixing structure 10 of the flexible water blocking member of the present invention, since the friction increasing portion 32 is constituted by the roughened portion 32A provided with the concavo-convex portion formed on the surface 31, shot blast, grit blast, etc. Thus, the coefficient of friction μ of the surface of the pressing member 30 can be increased.
As a result, the resistance R against the tensile force T applied to the flexible water blocking member 20 is further increased by an amount corresponding to the increase in the friction coefficient μ, thereby preventing withdrawal when high water pressure acts to ensure further excellent water blocking performance. can do.
Therefore, even if the axial force P applied to the anchor bolt 6 is the same as before, the presser member 30 is made thinner by an amount corresponding to the increase of the friction coefficient μ in the roughened portion 32A. In this case, the clamping force by the anchor bolt 6 can be reduced, and the anchor bolt 6 can be made thin and the installation interval can be increased.

  According to the flexible water blocking member fixing structure 10 of the present invention, the pressing member 30 is provided with the insertion hole 33 of the anchor bolt 6, and the anchor bolt 6 penetrating the anchorage 22 is inserted through the insertion hole 33. Since it is fixed to the structure 1, the waterproofness can be improved by providing the friction increasing portion 32 in the pressing member 30 without changing the fixing structure up to now.

  According to the flexible water blocking member fixing structure 10B of the present invention, the pressing member 30A is provided with the insertion hole 33 of the anchor bolt 6, and the insertion hole 33 is disposed outside the end edge portion of the anchorage 22. The anchor bolt 6 is inserted, and the inside of the end edge of the anchorage portion 22 is held down and fixed to the structure 1, so processing of the bolt hole of the anchor bolt 6 in the flexible water blocking member 20A and the anchor bolt It can be easily applied without the need for processing in accordance with the arrangement of No. 6, and water fastness can be improved.

  According to the fixing structure 10C of the flexible water blocking member of the present invention, one end portion of the fixing member 50 to be tightened by the anchor bolt 6 disposed outside the end edge portion of the anchoring portion 22 It is not necessary to form the bolt holes of the anchor bolt 6 in the flexible water blocking member 20B and the pressing member 30B because it is fixed to the structure 1 and the freedom of design and manufacture and the freedom of construction are improved. It is possible to improve the waterproofness.

According to the fixing structure 10A, 10B of the flexible water blocking member of the present invention, the frame plate member 40 in which the bonding portion 22 is disposed on the surface of the structure 1 is provided. The friction increasing portion 44 is provided on the surfaces 41a and 42a in contact with 22A, and the anchoring portions 22 and 22A are fixed to the structure 1 by being sandwiched between the pressing members 30 and 30A and the frame plate member 40. Both the front and back sides of the welded portion 22 of the water member 20 are sandwiched by the friction increasing portions 32, 44, and the resistance to the tensile force T applied to the flexible water blocking member 20 by the increase of the friction coefficient μ on the front and back. R is further increased, and it is possible to prevent withdrawal when high water pressure acts, and to ensure further excellent water blocking performance.
Therefore, even if the axial force P applied to the anchor bolt 6 is the same as before, the presser member 30 is made thinner by the amount by which the friction coefficient μ is increased by the friction increasing portions 32 and 44. On the other hand, the clamping force by the anchor bolt 6 can be reduced, and the anchor bolt 6 can be made thin and the installation interval can be increased.
Further, when replacing the existing flexible water blocking member 20, when constructing the mounting groove portion 1A of the structure 1, the frame plate member 40 provided with the friction increasing portion 44 is used, and the surface of the pressing member 30 is By forming the friction increasing portion 32 at 31, the flexible water blocking member 20 can be obtained by increasing the friction coefficient μ of the friction increasing portions 32 and 44 simply by tightening with the same axial force P as before. The resistance R against the applied tensile force T can be further increased, and the water fastness can be further improved.

The flexible water blocking members 20, 20A, and 20B described in the above embodiment are merely examples, and the shapes of the stretchable portion 21 and the anchoring portions 22, 22A, 22B are not limited to the illustrated example, and other shapes are also possible. It may be a shape.
Further, the configurations of the pressing members 30, 30A, 30B and the fixing member 50 are not limited to those described in the above-described embodiment, and the configurations are not limited as long as they have the same function.
In addition, the present invention is applied to the fixing structure of the flexible water blocking member such as the fixing portion of the water blocking sheet outside the joint portion of the structure, the fixing portion of the waterproof member of the flexible sheet board, and the fixing portion of the pressure resistant rubber plate. can do.
Furthermore, according to the present invention, the fixing structure of the flexible water blocking member described in the above embodiment can be configured singly or in any combination.

DESCRIPTION OF SYMBOLS 1 structure 1A attachment groove part 2 structure 3 joint part 4 flexible water blocking member 4a expansion-contraction part 4b anchorage part 6 anchor bolt 7 pressing plate 8 nut 10 flexible water blocking member fixing structure 10A flexible water blocking member fixed Structure 10B: Flexible water blocking member fixing structure 10C: Flexible water blocking member fixing structure 10D: Flexible water blocking member fixing structure 20: Flexible water blocking member 20A: Flexible water blocking member 20B: Flexible water blocking member 21: Stretching part 22 Fixing portion 22A Fixing portion 22B Fixing portion 23A Locking groove 23B Retaining portion 30A Holding member 30A Holding member 30B Holding member 30C Holding member 30a Vertical holding portion 30b Horizontal protrusion 30c Horizontal holding portion 30d Holding projection 31 Surface 31B Surface 32 Friction increasing portion 32A Roughened portion 32a Synthetic resin film 32b Inorganic particles 33 Insertion hole 33A Insertion hole 34 Surface 36 Surface pressure member 40 Frame plate member 41 Intermediate horizontal portion 41a Surface 2 first vertical portion 42a surface 43 second vertical portion 44 friction increasing portion 50 fixing member 51 intermediate plate-like portion 52 side plate portion 53 pressing arm portion 54 elastic contact portion 55 locking projection portion 30 pressing member 60 water pressure test device 61 Pressure pump 62 Water pressure gauge

Claims (9)

A flexible water blocking member including an expansion and contraction portion that allows displacement, and a fixation portion that is extended to the expansion and contraction portion and provided at an end edge portion is applied to the adhesion portion via a pressing member. A fixing structure of a flexible water blocking member fixed to a joint portion of a structure, comprising:
The pressing member is provided with a friction increasing portion on a surface to be in contact with the welding portion.
A fixed structure of a flexible water blocking member characterized in that. The friction increasing portion of the pressing member includes a surface that comes in contact with the pressing member by displacement / deformation of the flexible water blocking member.
The fixing structure of the flexible water blocking member according to claim 1. The pressing member is provided on the surface of the pressing member in contact with the welding portion, the surface pressing member being pushed into the welding portion to increase the surface pressure.
The friction increasing portion is provided on the surface of the surface pressure member.
The fixed structure of the flexible water stop member according to claim 1 or 2 characterized by things. The friction increasing portion is a synthetic resin film formed on the surface;
And inorganic particles provided on the synthetic resin film and partially exposed and embedded.
The fixing structure of a flexible water blocking member according to any one of claims 1 to 3, characterized in that. The friction increasing portion is constituted by a roughened portion provided with an uneven portion formed on the surface,
The fixing structure of a flexible water blocking member according to any one of claims 1 to 3, characterized in that. The pressing member is provided with an insertion hole for an anchor bolt, and the anchor bolt penetrating the welding part is inserted into the insertion hole and fixed to the structure.
The fixing structure of the flexible water blocking member according to any one of claims 1 to 5, characterized in that: The pressing member includes an insertion hole for an anchor bolt, and the anchor bolt disposed outside the end edge portion of the welding portion is inserted into the insertion hole, and the end edge portion of the welding portion It is fixed to the above-mentioned structure by holding the inside.
The fixing structure of the flexible water blocking member according to any one of claims 1 to 5, characterized in that: The pressing member is fixed to the structure by bringing one end portion of a fixing member to be tightened by an anchor bolt disposed outside the end edge portion of the welding portion into contact with the holding member.
The fixing structure of the flexible water blocking member according to any one of claims 1 to 5, characterized in that: The fixing structure includes a frame plate member that brings the welding portion into contact with the surface of the structure;
The frame plate member is provided with a friction increasing portion on a surface with which the welding portion contacts, and the bonding portion brought into contact with the friction increasing portion of the frame plate member is sandwiched by the pressing member and the structure Fixed to the object,
The fixing structure of a flexible water blocking member according to any one of claims 1 to 8, characterized in that.

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