JP2007247139A - Water cut-off structure of inner wall surface of structure and method of constructing it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water cut-off structure of an inner wall surface of a structure in which water cut-off sheets are easily stretched and the joining of the water cut-off sheets, which is mostly important, is easily performed and a method of constructing the structure. <P>SOLUTION: In this water cut-off structure of the inner wall surface of the structure, the inner wall surface 11 of the concrete structure 15 is covered by the water cut-off sheets 13. The structure comprises a fixed band plate the leg parts of which are buried in the inner wall surface 11 and which is disposed flush with the inner wall surface 11, the water cut-off sheet 13 secured to the fixed band plate continuously along the longitudinal direction of the fixed band plate, and the other water cut-off sheets 13 adjacent to the water cut-off sheet 13 secured to the fixed band plate. The end edge 13a of the water cut-off sheet 13 secured to the fixed band plate parallel with the fixed band plate is joined to one end edge 13a of the adjacent other water cut-off sheet 13. The inner wall surface 11 is covered by the joined water cut-off sheets 13. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention enables the inner wall surface of a concrete structure to be protected from erosion / corrosion, and the inner wall surface of a structure with a low roughness coefficient to be constructed, thereby greatly improving the life of the concrete structure. In particular, the final disposal site for waste, adjustment ponds, artificial ponds, newly constructed waterways, wall waterproofing of building structures, tunnel side walls / ceilings, water and sewage treatment facilities, food / chemical / It is suitable for use in a water-stop structure using a water shielding sheet such as a high-tech factory.

  Various water-stop structures for structures that come into contact with water have been proposed. For example, the water stop structures disclosed in Patent Documents 1 and 2 include concrete nails, anchor bolts, and the like on the inner wall surface of an existing concrete structure, in particular, the entrance corner portion and the exit corner portion that are easy to lift the water shielding sheet. A corner member is fixed by using, and a water shielding sheet is fixed to the corner member, or adjacent water shielding sheets are joined to a water shielding sheet previously bonded to the corner member. The sheet is extended to cover the inner wall.

Moreover, the water stop structure disclosed in Patent Document 3 uses a lining plate with an anchor, and embeds the anchor in the inner wall surface, thereby covering the entire inner wall surface with the lining plate. Further, in the water stop structure disclosed in Patent Document 4, a disk-like member is hit with a concrete nail at an appropriate location on the inner wall surface of a concrete structure, and a water shielding sheet is fixed thereon to cover the inner wall surface. ing. In addition, a waterproof material is applied to the inner wall surface of a concrete structure with a predetermined film thickness, and a waterproof sheet is applied to the entire inner wall surface by using an adhesive-type waterproof structure that covers the inner wall surface with a waterproof film. A sheet-adhesive water-stop structure for bonding was also employed.
JP 9-49267 A Japanese Patent Laid-Open No. 61-232192 Japanese Patent Laid-Open No. 5-132963 Japanese Patent Publication No. 61-35072

However, the water-stopping structure using the corner members disclosed in Patent Documents 1 and 2 can be sufficiently fixed if there are few entrance and exit corners in the structure and the number of places to be fixed to the inner wall surface is reduced. The problem arises that the water shielding sheet floats up from the inner wall surface.
Moreover, since the water-stopping structure disclosed in Patent Document 3 uses a specially shaped lining plate having an anchor, it is difficult to manufacture the lining plate, the member cost is increased, and the concrete structure has a complicated shape. In some cases, it was difficult to follow the lining plate on the inner wall surface, and there was a problem of poor workability. In addition, in order to attach the lining plate to the formwork before placing the concrete, innumerable holes will be opened in the lining plate by the separator that fixes the formwork, and the holes opened in the lining plate after the mold is removed, Although it is necessary to prevent water leakage, problems such as the reliability of this repair and oversight of holes occur, leading to a delay in the construction period. Furthermore, due to shrinkage after solidification of the concrete, the lining plate is lifted from the inner wall surface and peeled off. Occurred.
Further, the water stop structure disclosed in Patent Document 4 is provided with the disk-shaped members for fixing the water shielding sheet, interspersed on the inner wall surface, so the fixing work of the water shielding sheet is complicated, There was a problem with poor workability. In addition, since the water shielding sheet is fixed to the disk-shaped members scattered on the inner wall surface, the inner wall surface and the water shielding sheet cannot be partitioned in units of the water shielding sheet. Water that has passed through between the inner wall surface and the water-impervious sheet has a problem that makes it difficult to find and repair the infiltrated portion, and there is also a risk of corroding the concrete wall surface.
Furthermore, the coating-type waterstop structure tends to cause unevenness in the film thickness, and easily breaks in the thin part. In addition, the dirt is taken in until the coating film is cured, and this dirt becomes a subsequent pinhole. There was also a problem.
Moreover, the sheet-adhesive water-stopping structure using an adhesive requires a pressing mold until the adhesive is completely cured, and has a problem of poor workability.

  The present invention has been made in view of the above circumstances, and can easily stretch the water-impervious sheet, can easily construct the most important water-impervious sheets, and can also automate the joints. An object of the present invention is to provide a water stop structure on the inner wall surface of a structure that can be spread without lifting, and a construction method thereof, thereby improving workability and improving the reliability of the water stop structure.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The water-stopping structure of the inner wall surface of the structure according to claim 1 of the present invention is a water-stopping structure of the inner wall surface of the structure in which the inner wall surface 11 of the concrete structure is covered with a water shielding sheet 13,
A fixed band plate 17 in which legs 17a are embedded in the inner wall surface 11 and arranged in the same plane as the inner wall surface 11;
A water shielding sheet 13 that is continuously fixed to the fixed band plate 17 along the longitudinal direction of the fixed band plate 17;
Another water shielding sheet 13 adjacent to the water shielding sheet 13 fixed to the fixed strip 17;
With
An edge 13a along the fixed band plate 17 of the water shielding sheet 13 fixed to the fixed band plate 17 is joined to one edge 13a of the other adjacent water shielding sheet 13,
The inner wall surface 11 is covered with a plurality of the water shielding sheets 13 joined together.

  In the water blocking structure of the inner wall surface of the structure, the water shielding sheet 13 is stretched along the inner wall surface 11 without being lifted, and is continuously fixed along the fixed band plate 17. Can be reliably and easily joined.

In the water stop structure of the inner wall surface of the structure according to claim 2, the inner wall surface 11 is a substantially vertical surface,
The fixed band plate 17 is arranged such that the longitudinal direction is the vertical direction.

  In the water stop structure of the inner wall surface of the structure, the water shielding sheet 13 developed on the inner wall surface 11 can be bonded and fixed to the fixed strip 17 from the upper side to the lower side by its own weight.

In the water stop structure of the inner wall surface of the structure according to claim 3, a pair of parallel fixed strips 17, 17 are disposed on the inner wall surface 11,
The width of the water shielding sheet 17 is formed to be larger than the distance between the pair of fixed strips 17, 17,
The edge 13a inside the width direction both ends of the water-impervious sheet 13 is fixed to the fixed band plates 17 and 17, respectively.

  In the water blocking structure of the inner wall surface of the structure, for example, it is possible to extend the belt-shaped water-impervious sheet 13 wound in a roll shape while fixing both ends to the pair of fixed strip plates 17 and 17.

  The water stop structure of the inner wall surface of the structure according to claim 4 is such that the end edges 13a and 13a of the adjacent water-impervious sheet 13 are continuously connected by two joint portions 43 parallel to the end side portion 13b. It is characterized by being joined.

  In the water stop structure of the inner wall surface of the structure, the quality determination test of the joint portion 43, that is, the discovery of a joint failure location can be performed by injecting compressed air into the space 45 sandwiched between the two joint portions 43.

The construction method of the water-stopping structure of the inner wall surface of the structure according to claim 5 is a construction method of the water-stopping structure in which the inner wall surface 11 of the concrete structure is covered with the water shielding sheet 13.
A fixed band plate 17 having leg portions 17a is attached to the inner surface 21a of the mold 21 installed to construct the inner wall surface 11 so that the leg portions 17a face inward.
Concrete 31 is placed in the mold 21,
The inner wall surface 11 is constructed by removing the formwork 21 after the concrete 31 is solidified,
The impermeable sheet 13 stretched on the inner wall surface 11 is continuously bonded and fixed along the longitudinal direction of the fixed band plate 17 to the fixed band plate 17 exposed in the same plane as the inner wall surface 11;
The edge 13a of the other adjacent water-impervious sheet 13 is continuously joined to the edge 13a of the water-impervious sheet 13 fixed to the fixed strip 17 by a joint 43 parallel to the end side 13b. It is characterized by.

  In the construction method of the water stop structure of the inner wall surface of the structure, the water shielding sheet 13 is expanded on the inner wall surface 11 without being lifted, and the most important water shielding sheets 13 and 13 can be reliably and easily joined to each other.

In the construction method of the water stop structure of the inner wall surface of the structure according to claim 6, a pair of parallel fixed strips 17 and 17 are disposed on the inner wall surface 11,
Each of the inner sides of the water-impervious sheet 13 in the width direction is fixed to the fixed band plate 17,
Each edge 13a, 13a of the width direction both ends of the said water-impervious sheet | seat 13 extended outside this fixed strip 17 is made into the joining allowance K with the other adjacent water-impervious sheet | seat 13. .

  In the construction method of the water stop structure of the inner wall surface of the structure, the vicinity of the joint allowance K is fixed in a continuous linear shape, the movement of the joint allowance K is restricted, and the water shielding sheets 13 and 13 can be joined easily. .

  The construction method of the water stop structure of the inner wall surface of the structure according to claim 7 is characterized in that masking tape 27 covers the step portions 25 between both ends along the longitudinal direction of the fixed strip 17 and the formwork 21. And

  In this construction method of the water stop structure of the inner wall surface of the structure, the intrusion of the concrete 31 between the fixed strip 17 and the formwork 21 at the time of placing the concrete is prevented.

  The construction method of the water stop structure of the inner wall surface of the structure according to claim 8 is characterized in that the fixing strip 17 and the water shielding sheet 13 are joined and fixed by heat welding.

  In this construction method of the water blocking structure on the inner wall surface of the structure, the fixed strip 17 and the water shielding sheet 13 can be joined in a straight continuous operation.

  The construction method of the water stop structure of the inner wall surface of the structure according to claim 9 is characterized in that the fixing strip and the water shielding sheet are bonded and fixed with a hot melt adhesive.

  In this construction method of the water blocking structure on the inner wall surface of the structure, the fixed strip 17 and the water shielding sheet 13 can be joined in a straight continuous operation.

  The construction method of the water stop structure of the inner wall surface of the structure according to claim 10 is configured such that the two edges of the water-impervious sheet 13 are parallel to the end side part 13b of the water-impervious sheet 13 in a continuous manner. 43 is joined.

  In the construction method of the water stop structure of the inner wall surface of the structure, the quality judgment test of the joints 43, 43, that is, the joint failure location, is performed by injecting compressed air into the space 45 sandwiched between the two joints 43, 43. Can be discovered.

  According to the water blocking structure of the inner wall surface of the structure according to claim 1 according to the present invention, the fixed band plate is disposed on the inner wall surface, and the water shielding sheet is fixed to the fixed band plate along the longitudinal direction, Since the edges of the water-blocking sheet adhering to the fixed strip and the other adjacent water-blocking sheets are bonded together, the water-blocking sheet can be easily spread on the inner wall surface without lifting, and the most important water-blocking sheet is bonded Can be reliably and easily performed. As a result, the water-impervious sheet can be continuously fixed to the fixed band plate, and the joining of the sheets can be automated. As a result, the workability and the reliability of the water stop structure can be improved.

  According to the water blocking structure of the inner wall surface of the structure according to claim 2, the inner wall surface is a substantially vertical surface, and the fixed strip is disposed with the longitudinal direction set in the vertical direction. The impermeable sheet can be joined and fixed to the fixing strip from the upper side to the lower side, and the impermeable sheet can be easily and nicely extended along the inner wall surface without being lifted or slackened.

  According to the water blocking structure for the inner wall surface of the structure according to claim 3, the pair of parallel fixed strips are disposed on the inner wall surface, and the width of the water shielding sheet is larger than the interval between the pair of fixed strip plates. Formed, because each of the edge inside the width direction both ends of the water-impervious sheet is fixed to the fixed band plate, for example, while fixing both ends of the band-shaped water impermeable sheet wound in a roll shape to a pair of fixed band plate, A reliable and easy extension can be made possible.

  According to the water-stopping structure of the inner wall surface of the structure according to claim 4, since the edges of the water-blocking sheets stacked adjacent to each other are continuously joined by the two joints, By injecting compressed air into the sandwiched space, it is possible to easily determine whether or not the joint is good, that is, to find a joint failure point.

  According to the construction method of the water stop structure of the inner wall surface of the structure according to claim 5, a fixed strip having a leg portion is attached to the inner surface of the formwork, and the formwork is fixed after the concrete placed in the formwork is solidified. The inner wall surface is constructed by removing, and the impermeable sheet stretched on the inner wall surface is joined and fixed continuously along the longitudinal direction of the fixed band plate, and is attached to the edge of the impermeable sheet fixed to the fixed band plate. Since the edges of other adjacent water-blocking sheets are joined continuously by a joint parallel to the edge, the water-blocking sheet can be easily extended to the inner wall surface without lifting, and is the most important water-proof sheet Joining each other can be performed reliably and easily. Thereby, automation of joining of sheets can also be enabled. As a result, the workability and the reliability of the water stop structure can be improved.

  According to the construction method of the water stop structure of the inner wall surface of the structure according to claim 6, each edge of each of the both ends in the width direction of the water shielding sheet extending outward from the fixed band plate is adjacent to another water shielding sheet. Therefore, it is possible to fix the vicinity of the joining margin in a continuous linear shape, restrict the movement of the joining margin, and facilitate joining of the water shielding sheets. As a result, a straight continuous joining operation is realized along the strip, and the joining portion can be automated.

  According to the construction method of the water stop structure of the inner wall surface of the structure according to claim 7, since the step portion between the both ends along the longitudinal direction of the fixed strip and the mold frame is covered with the masking tape, it is fixed at the time of placing the concrete. Concrete can be prevented from entering between the strip and the formwork, and the surface of the fixed strip after the construction of the inner wall surface can be made into a finished surface with good water shielding sheet bonding.

  According to the construction method of the water stop structure of the inner wall surface of the structure according to claim 8, since the fixing strip and the water shielding sheet are bonded and fixed by heat welding, the fixing strip and the water shielding sheet are straight and continuous. It can be easily joined by work, and joining of the water shielding sheets can be automated. It is also possible to provide a steel plate on the back side of the fixed strip and melt-bond it by electromagnetic induction heating.

  According to the construction method of the water stop structure of the inner wall surface of the structure according to claim 9, since the fixing strip and the water shielding sheet are bonded and fixed by the hot melt adhesive, the fixing strip and the water shielding sheet are straightened. Can be easily joined in a continuous operation, making it possible to automate the joining of the water shielding sheets.

  According to the construction method of the water stop structure of the inner wall surface of the structure according to claim 10, since the edges of the water shielding sheet are joined by the two joints, the compressed air is compressed in the space sandwiched by the two joints. By injecting, defects in the joint can be easily found.

Hereinafter, preferred embodiments of a water-stopping structure for an inner wall surface of a structure and a construction method thereof according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view of an inner wall surface of a structure having a water stop structure according to the present invention, and FIG. 2 is a cross-sectional view taken along line AA in FIG.
The water stop structure of the inner wall surface of the structure according to the present embodiment can be suitably used for a concrete structure 15 such as a water storage tank in which the inner wall surface 11 is covered with a water shielding sheet 13. A fixed band plate 17 shown in FIG. 2 is disposed on the inner wall surface 11, and a pair of leg portions 17 a and 17 a are embedded in the inner wall surface 11. The fixed band plate 17 in which the leg portions 17 a and 17 a are embedded has a surface opposite to the leg portions 17 a and 17 a arranged in the same plane as the inner wall surface 11.

  The impermeable sheet 13 is fixed to the fixed strip 17 exposed on the inner wall surface 11 continuously along the longitudinal direction of the fixed strip 17. As the water-impervious sheet 13, for example, an olefin-based resin such as low-density polyethylene made by copolymerization of ethylene and α-olefin, that is, linear low-density polyethylene (L-LDPE) can be suitably used. A plurality of fixed strips 17 are provided on the inner wall surface 11, and other water shielding sheets 13 are fixed to the respective fixed strips 17. In the water-impervious sheet 13 fixed to the fixed band plate 17, an end edge 13 a parallel to the fixed band plate 17 of the water-impervious sheet 13 is joined to one end edge 13 a of another adjacent water-impervious sheet 13. The inner wall surface 11 is covered with a plurality of water shielding sheets 13 in which end edges 13a and 13a are joined.

  In the present embodiment, the inner wall surface 11 is a substantially vertical surface. The fixed strip 17 is disposed so that the longitudinal direction is the vertical direction. Therefore, the water-impervious sheet 13 is developed along the inner wall surface 11 with a predetermined tension by its own weight, and can be bonded and fixed to the fixed strip 17 from the upper side to the lower side. Thereby, the water-impervious sheet 13 can be easily and nicely extended on the inner wall surface 11 without being lifted or slackened.

  In the present embodiment, a plurality of sets of at least a pair of parallel fixed strips 17 and 17 are arranged on the inner wall surface 11 as a set. And the water-impervious sheet 13 is formed so that the width is slightly larger than the distance between the pair of fixed strips 17, 17. The water-impervious sheet 13 is fixed to the fixed band plate 17 at the inner edges 13a from both ends in the width direction. Accordingly, for example, the both ends in the width direction of the long band-shaped water-impervious sheet 13 wound in a roll shape are firmly fixed to the pair of fixed band plates 17 and 17, thereby enabling reliable and easy expansion.

  As shown in FIGS. 4 and 5, the fixed band plate 17 has a pair of leg portions 17 a and an example in which a bulge-shaped portion is provided at each end edge. As shown in FIG. 3, it may have, for example, one leg portion 17a. The fixed strip 17 is made of plastic, rubber or the like, preferably made of the same olefin-based resin as that of the water shielding sheet, and has a strip shape substantially perpendicular to the center or one side edge of the inner surface of the strip 17b having a smooth outer surface. The leg part 17a is protruded. A throwing foot 17c is provided at the tip of the leg portion 17a, and an appropriate number of auxiliary throwing feet 17d is provided at an intermediate portion of the leg portion 17a.

  The adjacent water-impervious sheets 13 and 13 are overlapped with each other at a predetermined joining allowance K (about 100 to 130 mm) as shown in FIG. This joining allowance K is continuously joined, for example, by a single joining part parallel to the end side part 13b of the water shielding sheet 13. In addition, the joining allowance K may be continuously joined by two joining portions parallel to the end side portion 13b (see FIG. 15). If the edges 13a of the water-impervious sheet 13 are continuously joined together by two joints, defective joints can be easily found by enclosing compressed air in the space between the two joints. can do. Further, the upper end edge of the concrete structure 15 is such that the upper end edge fixing band plate 19 is, for example, horizontal on the upper edge of the inner wall surface 11 and connects the upper end of each of the fixed band plates 17, 17,. Form. In addition, the fixing method of the water shielding sheet 13 to the fixed band plate 19 for the upper edge is the same as the fixing method to the fixed band plate 17.

  Therefore, according to the water stop structure of the inner wall surface of the structure, a plurality of fixed strips 17 are disposed on the inner wall surface 11, and the water shielding sheet 13 is fixed to the fixed strip plate 17 along the longitudinal direction. Since the edge 13a of the other water-impervious sheet 13 adjoining the water-impervious sheet 13 fixed to the fixed band plate 17 and 13a are joined together, the water-impervious sheet 13 can be easily extended to the inner wall surface 11 without being lifted, It is possible to reliably and easily join the important water-impervious sheets 13, 13 at the end edges 13a, 13a. Thereby, automation of joining of water shielding sheets can also be made possible. As a result, the workability and reliability of the water stop structure can be improved.

Next, the construction method of the water stop structure comprised as mentioned above is demonstrated.
FIG. 4 is a plan view of a formwork having a fixed strip attached to the inner surface.
A fixed band plate 17 having a pair of leg portions 17a and 17a is attached to the inner surface 21a of the mold 21 installed to construct the inner wall surface 11 so that the leg portions 17a and 17a face inward. The fixed strip 17 is fixed to the inner surface 21a by a plastic nail 29 (see FIGS. 5 and 6). In the figure, reference numeral 23 denotes a separator that maintains and fixes the space between the molds 21.

FIG. 5 is an enlarged perspective view of a mold frame in which a masking tape is attached to a step portion between the fixed band plate and the inner surface, and FIG. 6 is a horizontal sectional view of the mold plate provided with the fixed band plate and the masking tape.
At this time, the stepped portion 25 between both ends 17 e and 17 e along the longitudinal direction of the fixed strip 17 and the inner surface 21 a of the mold 21 is covered with the masking tape 27. In this way, the stepped portion 25 between both ends 17e, 17e along the longitudinal direction of the fixed band plate 17 and the inner surface 21a of the mold 21 is covered with the masking tape 27. Therefore, as shown in FIG. The gap with 21a is reliably closed by the masking tape 27, and it is possible to prevent the concrete from entering between the fixed strip 17 and the inner surface 21a when placing concrete. The surface can be made into a finished surface with good water shielding sheet 13 bonding.

FIG. 7 is a horizontal cross-sectional view of a formwork in which concrete has been placed, and FIG. 8 is a horizontal cross-sectional view of the inner wall surface of the structure constructed by removing the formwork.
When the fixed strip 17 is attached, the concrete 31 is placed inside the mold 21. Then, after the concrete 31 is solidified, the inner wall 11 in which the legs 17a and 17a of the fixed band plate 17 shown in FIG. The plastic nail 29 is fold-folded and removed so as not to become a projection as much as possible. It is also preferable to scrape off. Thereby, it is made not to interfere (do not damage) with respect to the subsequent water-impervious sheet 13. On the other hand, even if the masking tape 27 remains, there is no problem because it is on the concrete 31 side of the water shielding sheet 13.

FIG. 9 is an explanatory diagram showing the state of expansion of the water-impervious sheet, FIG. 10 is an explanatory diagram showing the state of adhesion of the water-impervious sheet to the fixed strip, and FIG. FIG. 12 is a horizontal sectional view of the inner wall surface of the structure in which both ends in the width direction of the water shielding sheet are fixed to the fixed strip.
Next, the water-impervious sheet 13 in the state of the wound body 35 is lifted by the chain block 33 or a crane so as to be extended vertically upward from the lower portion of the inner wall surface 11, and is stretched on the inner wall surface 11. The wound water-impervious sheet 13 is preferably formed in advance in a length substantially equal to the height of the inner wall surface 11 to be extended. Next, as shown in FIG. 10, the water shielding sheet 13 spread on the inner wall surface 11 is continuously provided along the longitudinal direction of the fixed band plate 17 on the fixed band plate 17 that is exposed in the same plane as the inner wall surface 11. Stick. As a result, the water shielding sheet 13 is fixed to the surface of the fixed band plate 17 by the welded portion 41 as shown in FIG.

  As shown in FIG. 12, at least a pair of parallel fixed strip plates 17, 17 are disposed on the inner wall surface 11, and the inner sides of both ends of the water shielding sheet 13 in the width direction are fixed to the fixed strip plate 17. The margin 13a of the width direction both ends 13b and 13b of the water-impervious sheet 13 extending outward from the fixed strip 17 is joined to another adjacent water-impervious sheet 13 (see FIGS. 10 and 12). ). Thus, since the edge 13a of the water-impervious sheet 13 extending outward from the fixed band plate 17 is used as the joining margin K, the vicinity of the joining margin K can be fixed in a continuous linear shape, and the movement of the joining margin K is restricted. In addition, the water shielding sheets 13 and 13 can be easily joined to each other. As a result, a straight continuous joining operation is realized, and the joining of the water shielding sheets can be automated.

  The fixed strip 17 and the water shielding sheet 13 are welded and fixed, for example, by heat melting. Further, the fixing strip 17 and the water shielding sheet 13 may be bonded and fixed with a hot melt adhesive. By bonding and fixing with these heat-melting and hot-melt adhesives, the fixing strip 17 and the water-impervious sheet 13 can be easily joined in a straight continuous operation, and automatic joining of the water-impervious sheets 13 and 13 can be performed. Can be possible. As these welding machines, a manual type welding machine (for example, a welder manufactured by Leister Co., Ltd.) composed of a rubber roller 37 and a welding machine 39 can be suitably used.

FIG. 13 is a horizontal cross-sectional view of the inner wall surface of the structure on which the waterproof sheet, which is fixed to the fixed strip and the ends overlap, is stretched, and FIG. 14 is a view of the edges of the waterproof sheet joined by a single joint. A horizontal sectional view and FIG. 15 are horizontal sectional views of the edges of the water-impervious sheet joined by two joining portions.
As shown in FIG. 13, the edge 13 a of the other water shielding sheet 13 adjacent to the edge 13 a of the water shielding sheet 13 fixed to the fixed strip 17 is overlapped. This overlapping portion is a joining allowance K. Next, as illustrated in FIG. 14, the joining margins K and K of the adjacent water-impervious sheets 13 and 13 are continuously joined together by a joint 43 that is parallel to the end portion 13 b. In addition, as shown in FIG. 15, the joining margins K and K of the impermeable sheet 13 of the impermeable sheet 13 may be joined by two joining portions 43 and 43. In this way, by joining the two joints 43, 43, by injecting compressed air into the space 45 sandwiched between the two joints 43, 43, it is possible to easily find defects in the joints 43, 43. can do.

  Therefore, according to the construction method of the water stop structure, the fixed band plate 17 having the leg portions 17a and 17a is attached to the inner surface 21a of the mold 21, and the mold 21 is fixed after the concrete 31 placed in the mold is solidified. The inner wall surface 11 is constructed by removing and the water shielding sheet 13 stretched on the inner wall surface 11 is continuously bonded and fixed along the longitudinal direction of the fixed strip plate 17, and the shield plate fixed to the fixed strip plate 17 is secured. Since the edge 13a of the other water-impervious sheet 13 adjacent to the edge 13a of the water sheet 13 is continuously joined by the joint part 43 parallel to the end side part 13b, the water-impervious sheet 13 is not lifted easily. The inner wall surface 11 can be extended to the most important water-impervious sheet and can be reliably and easily joined. Thereby, automation of a joined part can also be enabled. As a result, the workability and the reliability of the water stop structure can be improved.

  Moreover, since the fixed strip 17 is in the shape of a strip, it can be easily attached to the mold 21 when forming the structure.

In addition, because it does not use a conventional plate-like lining plate, etc., it is easy to handle and has a shape that has internal and external corners, such as the internal shape of the structure, such as protruding parts such as beams, stepped parts, etc. For example, it is possible to obtain a reliable water-stopping performance by following various shapes of the inner wall surface without complicated work such as cutting and forming a plate.
Also, in the case of a structure like a lining plate, since it is fixed in advance to the mold, a hole in the separator is opened after the mold is removed, and after the concrete is solidified, the separator is removed. However, in the present invention, since the inner wall surface 11 is entirely covered with the water shielding sheet 13, the workability is improved.

  In addition, in said embodiment, although the case where the water-impervious sheet 13 was extended on the substantially vertical inner wall surface 11 was described as an example, the water-impervious sheet 13 other than this, for example, other than the vertical surface (vertical surface), for example, Even if it is a ceiling surface, a floor surface, an inclined surface, etc., the same effect as described above can be obtained.

It is a perspective view of the structure inner wall face which has a water stop structure concerning the present invention. It is AA sectional drawing of FIG. It is a perspective view which shows the shape of other embodiment of a fixed strip. It is a top view of the formwork in which the fixed strip was attached to the inner surface. It is an expansion perspective view of the formwork in which the masking tape was stuck to the level difference part of a fixed strip and an inner surface. It is a horizontal sectional view of a formwork board provided with a fixed strip and a masking tape. It is a horizontal sectional view of the formwork in which concrete was laid. It is a horizontal sectional view of the inner wall surface of the structure constructed by removing the formwork. It is explanatory drawing showing the expansion | deployment condition of a water-impervious sheet. It is explanatory drawing showing the adhesion work condition of the water shielding sheet with respect to a fixed strip. It is a horizontal sectional view of the inner wall surface of the structure representing the fixing part of the water shielding sheet to the fixed strip. It is a horizontal sectional view of the inner wall surface of the structure in which both ends in the width direction of the water shielding sheet are fixed to the fixed strip. It is a horizontal sectional view of the inner wall surface of the structure on which the water shielding sheet, which is fixed to the fixed strip and overlapped with each other, is stretched. It is a horizontal sectional view of the water-proof sheet edge joined together by one line of adhesion parts. It is a horizontal sectional view of the water-proof sheet edge joined by the adhesive part of two strips.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Inner wall surface 13 ... Water shielding sheet 13a ... Edge 13b ... End side 15 ... Concrete structure 17 ... Fixed strip 17a ... Leg part 21 ... Formwork 21a ... Inner surface 25 ... Step part 27 ... Masking tape 31 ... Concrete 43 ... Two joints parallel to the edge side K ... Join margin

Claims (10)

The water stop structure of the inner wall surface of the structure where the inner wall surface of the concrete structure is covered with a water shielding sheet,
A fixed band plate in which legs are embedded in the inner wall surface and arranged in the same plane as the inner wall surface;
A water shielding sheet that is continuously fixed to the fixed strip along the longitudinal direction of the fixed strip;
Other water shielding sheets adjacent to the water shielding sheet fixed to the fixed strip,
With
An edge along the fixed band plate of the water shielding sheet fixed to the fixed band plate is joined to one edge of the other adjacent water shielding sheet,
A water stop structure for an inner wall surface of a structure, wherein the inner wall surface is covered with a plurality of the water shielding sheets bonded together. The inner wall surface is a substantially vertical surface;
The waterstop structure for an inner wall surface of a structure according to claim 1, wherein the fixed strip is disposed so that a longitudinal direction thereof is a vertical direction. A pair of parallel fixed strips are disposed on the inner wall surface,
The width of the water-impervious sheet is formed larger than the interval between the pair of fixed strips,
The waterstop structure for the inner wall surface of the structure according to claim 1 or 2, wherein the inner edges of the water shielding sheet from both ends in the width direction are fixed to the respective fixing strips.   The edge of the said water-shielding sheet | seat piled up adjacently mutually joined continuously by the joint part of two strips parallel to an edge part, The any one of Claim 1, 2, 3 characterized by the above-mentioned. The water stop structure of the inner wall surface of the structure described in 1. It is a construction method of a still water structure that covers the inner wall surface of a concrete structure with a water shielding sheet,
A fixed strip having legs is attached to the inner surface of the formwork installed to construct the inner wall surface so that the legs are inward.
Placing concrete in the formwork,
The inner wall surface is constructed by removing the formwork after the concrete is solidified,
The water shielding sheet extended on the inner wall surface is continuously bonded and fixed along the longitudinal direction of the fixed band plate to the fixed band plate exposed in the same plane as the inner wall surface,
In the structure characterized in that the edge of another water-impervious sheet adjacent to the edge of the water-impervious sheet fixed to the fixed strip is continuously joined by a joint parallel to the end side part. Construction method of the water stop structure of the wall. A pair of parallel fixed strips are disposed on the inner wall surface,
Each of the inner side of the water-impervious sheet in the width direction is fixed to the fixed strip,
6. The structure according to claim 5, wherein each edge of the both sides in the width direction of the water-impervious sheet extending outward from the fixed strip is used as a joint allowance with another adjacent water-impervious sheet. Construction method of the water stop structure of the inner wall surface.   The method for constructing a water-stopping structure on the inner wall surface of a structure according to claim 5 or 6, wherein a step portion between the both ends along the longitudinal direction of the fixed strip and the mold is covered with a masking tape.   The construction method for the water stop structure of the inner wall surface of the structure according to any one of claims 5, 6, and 7, wherein the fixing strip and the water shielding sheet are bonded and fixed by heat welding.   The construction of the water-stopping structure on the inner wall surface of the structure according to any one of claims 5, 6, and 7, wherein the fixing strip and the water shielding sheet are bonded and fixed by a hot melt adhesive. Method.   The edge of the said water-impervious sheet is joined by two continuous joints parallel to the edge part of the said water-impervious sheet, any one of Claims 5, 6, 7, 8, 9 The construction method of the still water structure of the inner wall surface of the structure described in 1.

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