JP5374009B2 - Water stop sheet and water stop structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cut-off sheet which can secure a smooth water stream, and prevents an upstream end from curling up. <P>SOLUTION: The cut-off sheet 17 is attached to the inner surface of a concrete block 20 so that a joint part between adjacent concrete blocks can cut off water from the water stream 22. The inside surface of the upstream-side end of a sheet body 18 which constitutes the cut-off sheet 17 is formed in such a shape as to be inclined toward a surface on the side of the concrete block 20. This reduces resistance to the water stream 22 at the end 19 of the cut-off sheet 17. Consequently, water, garbage and the like are prevented from being accumulated around the end 19 even if the water stream 22 is stopped. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

  The present invention relates to a water-stop sheet and a water-stop structure, and more particularly to a water-stop sheet and a water-stop structure that stop a joint portion of a concrete structure such as a water channel.

  FIG. 12 is a diagram showing a schematic structure of a joint waterproof joint for a concrete structure disclosed in Patent Document 1.

  Referring to the figure, concrete block 20a and concrete block 20b are installed adjacent to each other through joint portion 35. The water stop sheet 17 is disposed on the inner surfaces so as to straddle the joint portion 35, and both ends thereof are attached by bolts 41a and 41b via the presser plates 40a and 40b. The waterproof sheet 17 is folded at the center to form a folded portion 37. Accordingly, when the interval between the joint portions 35 is widened due to an earthquake or the like, the folded state of the folding portion 37 is released, and the waterproof performance of the joint portion 35 by the waterproof sheet 17 is maintained.

JP-A-9-144148

  FIG. 13 is a schematic cross-sectional view for explaining problems of the water-stop sheet shown in FIG.

  Referring to the drawing, the end 19 of the water-stop sheet 17 is installed in a standing state with respect to the concrete block 20a. Therefore, when the water flow 22 is generated in the direction of the arrow, the water 61 remains at the end portion 19 in a state where the water flow 22 is stopped. As the water 61 remains, dust or the like mixed with the water flow 22 also remains, which is not preferable as a water channel.

  FIG. 14 is a schematic cross-sectional view for explaining still another problem with respect to the structure of the waterproof sheet shown in FIG.

  Referring to the figure, when the momentum of the water flow 22 becomes strong, the water-stop sheet 17 itself has flexibility, so that the end portion 19 is rolled up. Since the gap 63 is formed when the end portion 19 is rolled up, dust or the like flowing along with the water flow 22 enters the gap 63, which is not preferable.

  This invention was made in order to solve the above problems, and it aims at providing the water stop sheet | seat and water stop structure which can ensure a smooth water flow, and an upstream edge part does not swell up.

In order to achieve the above object, the invention according to claim 1 is used to stop a joint portion of an adjacent concrete block from a water flow generated inward of the concrete block, and is installed on the inner surface of the concrete block. The water-stop sheet is characterized in that at least the upstream end of the water flow is formed so that its thickness increases toward the tip.

  If comprised in this way, the bending rigidity of the upstream edge part of a water stop sheet will increase.

The invention according to claim 2 is a waterproof sheet that is used to stop a joint portion of an adjacent concrete block from a water flow generated inward of the concrete block, and is installed on the inner surface of the concrete block. And a rigid body that is connected to at least the upstream end of the seat body and has a higher bending rigidity than the seat body.

  If comprised in this way, the bending rigidity of the upstream edge part of a water stop sheet will increase.

  According to a third aspect of the present invention, in the configuration of the second aspect of the present invention, the rigid body has a shape in which the thickness decreases toward the surface on the concrete block side toward the tip.

  If comprised in this way, the resistance to a water flow will reduce the upstream edge part of a water stop sheet | seat.

  According to a fourth aspect of the present invention, in the configuration of the third aspect of the present invention, the rigid body is connected to a tip portion having a right triangle shape in cross section and a position on the concrete block side of the tip portion, and the cross section has a rectangular shape. The surface of the concrete block at the end of the seat body overlaps with the rear portion and is cut out so that the total thickness matches the thickness of the other parts of the seat body. .

  If comprised in this way, the movement to the direction away from a concrete block of a rigid body will be blocked | prevented by a sheet | seat main body.

  According to a fifth aspect of the present invention, in the configuration of the third aspect of the invention, the rigid body is connected to the tip portion having a right triangle shape in cross section and a position on the concrete block side of the tip portion, and the cross section is directed rearward. It consists of a rear part having a right triangle shape whose thickness decreases toward the surface of the concrete block, and the concrete block side surface at the end of the seat body overlaps the rear part, and its total thickness is Cut out to match the thickness of other parts.

  If comprised in this way, while the movement to the direction away from a concrete block of a rigid body will be blocked | prevented by a sheet | seat main body, the contact | adherence state of a sheet | seat main body and a rigid body will increase more.

  According to a sixth aspect of the present invention, in the configuration of the third aspect of the present invention, the rigid body is connected to a tip portion having a right-angled triangular cross section and a position farthest from the concrete block side of the tip portion, and has a rectangular cross section. The vertical distance between the plane including the concrete block side surface of the tip portion and the plane including the concrete block side surface of the rear portion coincides with the thickness of the seat body.

  If comprised in this way, a rigid body will be attached so that the edge part of a sheet | seat main body may be covered.

  The invention according to claim 7 is the structure of the invention according to claim 3, and is attached between the rigid body and the surface of the concrete block, and the cross section of the shape combined with the rigid body has the thickness of the sheet body as one side. And an elastic body having a right triangle shape.

  If comprised in this way, an elastic body will deform | transform according to the surface shape of a concrete block.

  The invention according to claim 8 is the water stop structure using the water stop sheet according to any one of claims 1 to 7, wherein the sheet body is formed with a folded portion, and the cover sheet covering the folded portion is provided. It is characterized by having.

  If comprised in this way, the level | step difference of the folding part of a sheet | seat main body will be covered with a cover sheet.

The invention according to claim 9 is a water stop structure used to stop a joint portion of an adjacent concrete block from a water flow generated inward of the concrete block, and is installed on the inner surface of the concrete block. It consists of a water-stop sheet consisting of a main body and an end connected to at least the upstream side of the sheet main body, and a presser plate that is arranged at the upstream end of the sheet main body and presses and fixes the sheet main body against the concrete block The end portion has a right-angled triangular cross section whose inner surface is inclined toward the concrete block surface and whose one side matches the total thickness of the sheet body and the presser plate. It is.

  If comprised in this way, the resistance with respect to the water flow in the upstream edge part of a water stop structure also including a holding plate will reduce.

The invention according to claim 10 is a water stop structure that is used to stop a joint portion of an adjacent concrete block from a water flow generated inside the concrete block, and is installed on the inner surface of the concrete block. a water stop sheet composed of the main body, disposed at the end of at least the upstream side of the seat body, a large rigid plate bending stiffness than the sheet body, are disposed on the upper surface of the rigid plate, and a seat body and a rigid plate in a concrete block The rigid plate is connected to the horizontal part located between the seat body and the presser plate and to the upstream side of the horizontal part, with its tip inclined to the surface of the concrete block. It consists of the inclined part bent so that it may contact | abut.

  If comprised in this way, the upstream edge part of a sheet | seat main body will be enclosed by the inclination part of a rigid board.

The invention according to claim 11 is a water stop structure that is used to stop a joint portion of an adjacent concrete block from a water flow generated inward of the concrete block, and is installed on the inner surface of the concrete block. It consists of a water-stop sheet consisting of a main body and a press plate that is placed at least on the upstream end of the main sheet body and presses and fixes the sheet main body against a concrete block, and the presser plate is a horizontal portion located on the upper surface of the end portion And an inclined portion that is connected to the upstream side of the horizontal portion and is bent so that the tip thereof is in contact with the surface of the concrete block in an inclined state.

  If comprised in this way, the upstream edge part of a sheet | seat main body will be enclosed by the inclination part of a pressing plate.

  As described above, according to the first aspect of the present invention, since the bending rigidity of the upstream end portion of the water-stop sheet increases, the risk of the end portion being swollen by the water flow is reduced.

  In the invention according to claim 2, since the bending rigidity of the upstream side end portion of the water-stop sheet increases, the risk of the end portion being swollen by the water flow is reduced. Moreover, the front-end | tip part of a water stop sheet | seat is protected with respect to collisions, such as a stone.

  In addition to the effect of the invention described in claim 2, the invention according to claim 3 is characterized in that the upstream end portion of the water stop sheet has a reduced resistance to water flow, so that the water flow smoothly flows along the end portion, and the water flow is stopped. Sometimes water or the like is prevented from accumulating at the end.

  In addition to the effect of the invention described in claim 3, the invention described in claim 4 prevents movement of the rigid body from the concrete block by the seat body, so that the mounting state of the rigid body is stabilized, and the waterproof sheet Reliability is improved.

  In addition to the effect of the invention of claim 3, the invention of claim 5 prevents the movement of the rigid body and increases the close contact state with the seat body. The reliability of the water sheet is further improved.

  According to the sixth aspect of the invention, in addition to the effect of the third aspect of the invention, since the rigid body is attached so as to cover the end portion of the seat body, the end portion of the seat body does not need to be processed, and It will be surely protected from collisions.

  According to the seventh aspect of the invention, in addition to the effect of the third aspect of the invention, since the elastic body is deformed according to the surface state of the concrete surface, the generation of a gap therebetween is prevented regardless of the surface state of the concrete surface. Therefore, the reliability of the waterproof sheet is improved.

  In addition to the effect of the invention according to any one of claims 1 to 7, the invention according to claim 8 is such that water or the like accumulates in the step because the step of the folded portion of the sheet body is covered with the cover sheet. Is prevented.

  According to the ninth aspect of the invention, since the resistance to the water flow at the upstream end portion of the water stop structure is reduced, the water flow smoothly flows along the end portion, and water or the like is prevented from collecting at the end portion when the water flow is stopped. Is done.

  In the invention according to claim 10, since the upstream end portion of the seat body is surrounded by the inclined portion of the rigid plate, the water flow smoothly flows along the inclined portion, and when the water flow is stopped, water or the like is at the end portion of the water stop sheet. Accumulation is prevented. Moreover, it is not necessary to process the edge part of a sheet | seat main body at all.

  In the invention according to claim 11, since the upstream end of the seat body is surrounded by the inclined portion of the presser plate, the water flow smoothly flows along the inclined portion, and when the water flow is stopped, water or the like is present at the end of the water stop sheet. Accumulation is prevented. Further, the end portion of the sheet main body does not need to be processed at all, and it is only necessary to change the shape of the holding plate, so that an efficient structure is obtained.

  FIG. 1 is a cross-sectional view showing a schematic structure of a water-stop sheet according to the first embodiment of the present invention.

  Referring to the figure, a water stop sheet 17 is installed on the inner surface of the concrete block 20. In the water blocking sheet 17, the upstream end 19 of the sheet main body 18 with respect to the water flow 22 is formed such that the inner surface thereof is inclined toward the surface of the concrete block 20. As a result, the water flow 22 smoothly flows along the end portion 19. In this way, the resistance to the water flow 22 at the end 19 of the water stop sheet 17 is reduced. As a result, when the water flow 22 is stopped, water, dust, and the like are prevented from accumulating at the end 19 of the water stop sheet 17.

  FIG. 2 is a sectional view showing a schematic structure of a water-stop sheet according to a second embodiment of the present invention.

  Referring to the drawing, as shown in (1), with respect to the sheet main body 18 constituting the water-stop sheet 17, the thickness of the sheet main body 18 is increased toward the tip on the upstream side. The end portions 19 formed so as to increase are integrally connected. Since the end portion 19 is at least thicker than the sheet body 18 and is made of the same material, the bending rigidity of the end portion 19 is larger than that of the sheet body 18. Therefore, as shown in (2), when the water flow 22 is applied to the end surface 24 of the end portion 19, the lower end 25 is prevented from rolling up due to the magnitude of the bending rigidity. As a result, the water stop sheet 17 is prevented from the accumulation of dust and the like due to the gap.

  FIG. 3 is a cross-sectional view showing a schematic shape of a water-stop sheet according to a third embodiment of the present invention.

  Referring to the figure, the water blocking sheet 17 disposed on the inner surface of the concrete block 20 is composed of a sheet body 18 and a rigid body 27 connected to an end 19 on the upstream side of the sheet body 18. The sheet body 18 is not different from a conventional waterproof sheet used in the past. On the other hand, the rigid body 27 is formed of, for example, a metal material and has a right-angled triangular cross-sectional shape in which the thickness decreases toward the surface on the concrete block 20 side toward the upstream side. Further, the rigid body 27 has a larger bending rigidity than the seat body 18.

  As a result, the water flow smoothly flows along the rigid body 27, and it is possible to prevent water, dust, and the like from accumulating around the rigid body 27 when the water flow is stopped. Moreover, since the bending rigidity of the rigid body 27 is large, the risk of the tip of the rigid body 27 being rolled up by the water flow is reduced. Further, since the end surface of the end portion 19 of the sheet main body 18 is covered with the rigid body 27, the front end portion of the sheet main body 18 is protected against the collision of stones or the like.

  FIG. 4 is a sectional view showing a schematic structure of a water-stop sheet according to the fourth embodiment of the present invention.

  Referring to the figure, the point that rigid body 27 is installed on the upstream side of seat body 18 is the same as in the third embodiment, but the shape of rigid body 27 is slightly different. That is, the rigid body 27 includes a tip portion 29 having a right-angled triangular cross section and a rear portion 30 connected to the concrete block 20 side of the tip portion 29 and having a rectangular cross section.

  The surface on the concrete block 20 side of the end portion 19 of the seat body 18 overlaps with the rear portion 30 and is cut out so that the total thickness thereof matches the thickness of the other portions of the seat body 18. As a result, the front end portion 29 can completely cover the upstream end surface of the end portion 19 of the sheet main body 18. Further, the rear portion 30 of the rigid body 27 is pressed to the concrete block 20 side by the end portion 19. Therefore, the rigid body 27 is prevented from moving away from the concrete block 20 due to the water flow, and a stable mounting state can be secured.

  By configuring in this way, a smooth water flow is ensured as in the third embodiment, and the retention of water, dust and the like when the water flow is stopped is prevented.

  FIG. 5 is a cross-sectional view showing a schematic structure of a water-stop sheet according to a fifth embodiment of the present invention.

  The basic structure is the same as that of the fourth embodiment, but the shape of the rear portion 30 of the rigid body 27 is slightly different. That is, the rear portion 30 of the rigid body 27 is connected to the position on the concrete block 20 side of the tip portion 29, and has a right triangle shape whose thickness decreases toward the surface of the concrete block 20 as the cross section thereof faces rearward. doing. The surface 19 of the end portion 19 of the sheet body 18 on the side of the concrete block 20 overlaps with the rear portion 30 and is cut out so that the total thickness thereof matches the thickness of other portions of the sheet body 18. As a result, the contact state between the seat body 18 and the rear portion 30 of the rigid body 27 is further increased, and the attachment state of the rigid body 27 is further stabilized. As a result, a smooth water flow is ensured, and water and dust are prevented from staying in the rigid body 27 when the water flow is stopped.

  FIG. 6 is a sectional view showing a schematic structure of a water-stop sheet according to the sixth embodiment of the present invention.

  Referring to the drawing, a rigid body 27 having a bending rigidity larger than that of the seat body 18 is constituted by a tip portion 29 having a right triangle shape in cross section and a rear portion 30 connected to the tip portion 29. The rear portion 30 is connected to a position farthest from the concrete block 20 side of the tip portion 29, and the cross section thereof has a rectangular shape. The vertical distance between the plane including the surface on the concrete block 20 side of the front end portion 29 and the plane including the surface on the concrete block 20 side of the rear portion 30 is set to match the thickness of the seat body 18.

  Thereby, it is possible to completely cover the upstream end surface of the end portion 19 of the sheet main body 18 in a state in which the leading end portion 29 is in contact with the inner surface of the concrete block 20. As a result, a smooth water flow is ensured, and there is no possibility that water, dust, or the like stays around the tip portion 29 when the water flow is stopped. Further, it is not necessary to process the upstream end face of the end portion 19 of the seat body 18, and the end portion 19 is reliably protected by the rigid body 27 from the collision of stone or the like flowing along with the water flow. Improves.

  FIG. 7 is a sectional view showing a schematic structure of a water-stop sheet according to the seventh embodiment of the present invention.

  Referring to the drawing, a rigid body 27 having a bending rigidity larger than that of the sheet main body 18 and an elastic body 33 that is elastically deformable are attached to the upstream end face of the end portion 19 of the sheet main body 18. The surface on the inner surface side of the combined shape of the rigid body 27 and the elastic body 33 is formed to be inclined toward the surface on the concrete block 20 side. These cross-sectional shapes have a right triangle shape with the thickness of the sheet body 18 as one side.

  With this configuration, a smooth water flow is ensured, and there is no possibility that water, dust, or the like will stay around the rigid body 27 and the elastic body 33 when the water flow is stopped. Further, since the elastic body 33 is disposed on the inner surface side of the concrete block 20, the elastic body 33 can be freely deformed into a close contact state according to the surface state of the concrete block 20. As a result, the occurrence of a gap between the elastic body 33 and the concrete block 20 is prevented regardless of the surface state of the concrete block 20, so that the reliability of the water stop sheet 17 is further improved.

  FIG. 8 is a schematic cross-sectional view showing a mounting state of a water stop structure according to an eighth embodiment of the present invention, and corresponds to the view of FIG. 12 shown as the background art.

  With reference to the drawing, a cover sheet 38 is attached so as to cover the entire inner surface side including the folded portion 37 of the water-stop sheet 17. And the edge part of the cover sheet 38 is being integrally fixed to the concrete block 20a and the concrete block 20b with the volt | bolt 41a and the volt | bolt 41b via the pressing board 40a and the pressing board 40b.

  When there is no cover sheet 38, a stepped portion is generated in the water-stop sheet 17 due to the structure of the folding portion 37. This step portion becomes resistance to the water flow in the same manner as the upstream end portion of the water blocking sheet 17. In addition, when the water flow is stopped, water, dust or the like stays in the stepped portion. However, when the water-stop sheet 17 is entirely covered with the cover sheet 38, the stepped portion by the cover sheet 38 is not exposed to the water flow. As a result, a smooth water flow is ensured, and water and dust etc. are prevented from staying in the stepped portion of the folding portion 37. Such a structure of the cover sheet 38 can be similarly applied to the waterproof sheet according to the first to seventh embodiments having a folded portion.

  FIG. 9 is a sectional view showing a schematic shape of a waterstop structure according to a ninth embodiment of the present invention.

  In addition, in this figure, the upstream part of the water stop sheet | seat 17 is represented. Referring to the figure, the water-stop sheet 17 includes a sheet body 18 having a substantially constant thickness and an end 19 connected to the upstream side of the sheet body 18. A pressing plate 40a is disposed on the upper surface of the upstream portion of the seat body 18 and fixes the seat body 18 to the concrete block 20a via bolts 41a. The end 19 of the waterstop sheet 17 has an inner surface inclined toward the surface of the concrete block 20a, and one side thereof coincides with the total thickness of the sheet main body 18 and the presser plate 40a. It has a right triangle shape cross section.

  Accordingly, the water flow is ensured smoothly along the end portion 19 without being affected by the upstream end surface of the presser plate 40a. As a result, there is no possibility that water, dust, or the like stays on the upstream side of the water stop sheet 17 and the upstream side of the presser plate 40a.

  FIG. 10 is a sectional view showing a schematic structure of a water stop structure according to a tenth embodiment of the present invention.

  Referring to the drawing, as the water-stop sheet 17, a normal sheet in which the end 19 on the upstream side of the sheet body 18 is not processed is used. A rigid plate 43 having higher bending rigidity than the sheet main body 18 is disposed on the upper surface on the upstream side of the sheet main body 18, and the sheet main body 18 and the rigid plate 43 are connected to the upper surface of the rigid plate 43 via bolts 41a. A pressing plate 40a that is pressed and fixed to the block 20a is disposed. The rigid plate 43 is connected to the horizontal portion 44 located between the seat body 18 and the presser plate 40a, and is connected to the upstream side of the horizontal portion 44 and bent so that the tip thereof is in contact with the surface of the concrete block 20a in an inclined state. And the inclined portion 45.

  With this configuration, a smooth water flow is ensured, and there is no possibility that water, dust, or the like stays on the upstream side of the seat body 18. Further, since the upstream end face of the water-stop sheet 17 is covered with the rigid plate 43, damage caused by stones or the like flowing along with the water flow is prevented.

  FIG. 11 is a sectional view showing a schematic structure of a water stop structure according to an eleventh embodiment of the present invention.

  Referring to the drawing, a normal sheet main body 18 whose end 19 is not processed at all is used as the waterproof sheet 17 itself. On the upper surface on the upstream side of the sheet main body 18, a presser plate 40a for pressing and fixing the sheet main body 18 to the concrete block 20a via the bolt 41a is disposed. The presser plate 40a is connected to the horizontal portion 48 positioned on the upper surface of the end portion 19 of the water-stop sheet 17 and the upstream side of the horizontal portion 48 so that the front end thereof is in contact with the surface of the concrete block 20a while being inclined. It is comprised from the inclination part 49 bent to.

  As a result, a smooth water flow is ensured, and there is no possibility that water, dust, or the like stays around the inclined portion 49. Further, since the presser plate 40a also serves to press and fix the water-stop sheet 17, it has an efficient structure. Furthermore, since the upstream end surface of the water stop sheet 17 is surrounded by the inclined portion 49 of the presser plate 40a, the water stop sheet 17 is prevented from being damaged by stones or the like flowing along with the water flow.

  In the third embodiment, the rigid body has a right-angled triangular cross section, but may have a rectangular cross-sectional shape having the same thickness as the sheet body. Even in this case, it is possible to prevent the end portion from rolling up due to the water flow due to the difference in bending rigidity.

  Further, in the second embodiment, the end portion extends symmetrically on the inner surface side and the outer surface side of the sheet main body as it goes to the front end. Even if it is formed so as to spread only in the region, the same effect can be obtained.

  Furthermore, in each said embodiment, although the water stop sheet | seat is attached to the inner surface of the concrete block in the close_contact | adhered state, even if a clearance gap exists between these, it is applicable similarly. In this case, it is more effective if the upstream end of the seat body and the rigid body are in contact with the inner surface of the concrete block.

It is sectional drawing which showed schematic structure of the water stop sheet | seat by 1st Embodiment of this invention. It is sectional drawing which showed schematic structure of the water stop sheet | seat by 2nd Embodiment of this invention. It is sectional drawing which showed schematic shape of the water stop sheet | seat by 3rd Embodiment of this invention. It is sectional drawing which showed schematic shape of the water stop sheet | seat by 4th Embodiment of this invention. It is sectional drawing which showed schematic shape of the water stop sheet | seat by 5th Embodiment of this invention. It is sectional drawing which showed schematic shape of the water stop sheet | seat by 6th Embodiment of this invention. It is sectional drawing which showed schematic shape of the water stop sheet | seat by 7th Embodiment of this invention. It is sectional drawing which showed schematic structure of the water stop structure by 8th Embodiment of this invention. It is sectional drawing which showed schematic shape of the water stop structure by 9th Embodiment of this invention. It is sectional drawing which showed schematic shape of the water stop structure by 10th Embodiment of this invention. It is sectional drawing which showed schematic shape of the water stop structure by 11th Embodiment of this invention. It is sectional drawing which showed schematic shape of the conventional water stop structure. It is a schematic sectional drawing for demonstrating the problem of the water stop structure shown in FIG. It is a schematic sectional drawing for demonstrating the other problem of the water stop structure shown in FIG.

Explanation of symbols

17 ... Waterproof sheet 18 ... Sheet body 19 ... End part 20 ... Concrete block 22 ... Water flow 27 ... Rigid body 29 ... Tip part 30 ... Rear part 33 ... Elastic body 35 ... Joint part 37 ... Folding part 38 ... Cover sheet 43 ... Rigid plates 44, 48... Horizontal portions 45, 49...

Claims (11)

It used the joints of adjacent concrete blocks in order to water-shutoff from water flow occurring inwardly of said concrete block, in the water stop sheet is placed on the inner surface of the concrete blocks,
The waterproof sheet is characterized in that at least an upstream end with respect to the water flow is formed so that its thickness increases toward the tip. It used the joints of adjacent concrete blocks in order to water-shutoff from water flow occurring inwardly of said concrete block, a water stop sheet is mounted on an inner surface of the concrete blocks,
The seat body,
A waterstop sheet, comprising: a rigid body connected to at least an upstream end portion of the sheet body and having a bending rigidity greater than that of the sheet body. The water-stop sheet according to claim 2, wherein the rigid body has a shape in which the thickness thereof decreases toward the surface on the concrete block side as it approaches the tip. The rigid body is composed of a tip portion having a right triangle shape in cross section and a rear portion connected to a position of the tip portion on the concrete block side and having a rectangular shape in cross section,
The surface on the concrete block side of the end portion of the seat body overlaps with the rear portion, and is cut out so that the total thickness thereof matches the thickness of other portions of the seat body. The waterproof sheet described. The rigid body is connected to a tip portion having a right triangle shape in cross section and a position on the concrete block side of the tip portion, and a right angle whose thickness decreases toward the surface of the concrete block as the cross section goes backward. A rear part having a triangular shape,
The surface on the concrete block side of the end portion of the seat body overlaps with the rear portion, and is cut out so that the total thickness thereof matches the thickness of other portions of the seat body. Water stop sheet. The rigid body is composed of a tip portion having a right triangle shape in cross section and a rear portion having a rectangular shape in cross section connected to a position farthest from the concrete block side of the tip portion. The waterproof sheet according to claim 3, wherein a vertical distance between a plane including a block-side surface and a plane including the concrete block-side surface of the rear portion coincides with the thickness of the sheet body. The cross section of the shape attached between the rigid body and the surface of the concrete block and combined with the rigid body further includes an elastic body having a right triangle shape with the thickness of the seat body as one side. The water-stop sheet according to Item 3. In the water stop structure using the water stop sheet according to any one of claims 1 to 7,
The water stop structure according to claim 1, wherein a folding part is formed on the sheet body, and a cover sheet is provided to cover the folding part. It used the joints of adjacent concrete blocks in order to water-shutoff from water flow occurring inwardly of said concrete block, a water shut-off structure is installed on an inner surface of the concrete blocks,
A waterproof sheet comprising a sheet body and an end connected to at least the upstream side of the sheet body;
It is arranged at the end on the upstream side of the seat body, and comprises a presser plate that presses and fixes the seat body to the concrete block,
The end portion has a right-angled triangular shape whose inner surface is inclined toward the concrete block surface and whose one side matches the total thickness of the sheet body and the presser plate. A water-stop structure having a cross section. It used the joints of adjacent concrete blocks in order to water-shutoff from water flow occurring inwardly of said concrete block, a water shut-off structure is installed on an inner surface of the concrete blocks,
A waterproof sheet consisting of a sheet body,
A rigid plate disposed at least at an upstream end of the seat body, and having a larger bending stiffness than the seat body;
A presser plate that is disposed on the upper surface of the rigid plate and presses and fixes the seat body and the rigid plate against the concrete block;
The rigid plate is connected to a horizontal portion located between the seat main body and the presser plate and to an upstream side of the horizontal portion, and bent so that a tip thereof is in contact with the surface of the concrete block in an inclined state. A water-stop structure comprising an inclined portion. It used the joints of adjacent concrete blocks in order to water-shutoff from water flow occurring inwardly of said concrete block, a water shut-off structure is installed on an inner surface of the concrete blocks,
A waterproof sheet consisting of a sheet body,
It is arranged at least at the upstream end of the seat body, and comprises a press plate that presses and fixes the seat body against the concrete block,
The presser plate is composed of a horizontal portion located on the upper surface of the end portion and an inclined portion that is connected to the upstream side of the horizontal portion and bent so that the tip thereof is in contact with the surface of the concrete block while being inclined. , Still water structure.

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