JP5039490B2 - Method and apparatus for post-installation of water-stopping material - Google Patents

Description

  The present invention provides a water-stopping material used for constructing a water-stopping material for filling concrete between the main girder and the precast floor slab after placing a precast floor slab on the upper side of the main girder during bridge construction work. The present invention relates to a post-installation construction method and apparatus.

  In recent years, a construction method using a precast floor slab has been frequently used as one method for constructing a bridge slab.

  When carrying out a bridge erection method using this type of precast floor slab, as shown in FIG. 6, a main girder (bridge girder) 2 extending in the bridge axis direction is spaced apart in the width direction on the pier 1 at a necessary interval. Install several. Next, a water stop material (bridge girder seal material) 3 is attached to both edge portions in the width direction of the upper surface of each main girder 2 so as to extend in the longitudinal direction of each main girder 2, that is, in the bridge axis direction. Next, on the upper side of each main girder 2 arranged in the width direction, after placing the precast floor slab 4 extending across the main girder 2 in the width direction from above the waterstop 3, Placing concrete 5 between the water stop materials 3 at both ends in the width direction of each main girder 2 compressed between the upper surface of the main girder 2 and the upper precast floor slab 4 Thus, the precast floor slab 4 is fixed to the main beam 2.

  For this purpose, the water-stopping material 3 is compressed between the upper surface of the main girder 2 and the precast floor slab 4 placed on the main girder 2, thereby replacing the main frame when filling concrete. Until the concrete 5 filled between the girder 2 and the precast floor slab 4 is hardened and exerts its strength, the concrete 5 does not drip (not leak) between the main girder 2 and the precast floor slab 4. Water-stopping performance is required.

  As the water-stopping material 3, a material in which a closed-cell type foam made of a closed-cell type polyethylene foam or rubber sponge is formed into a long square bar shape has been conventionally used. Further, a water blocking material 3 having a rectangular cross section in which a foam layer containing many open cells and a closed cell foam layer are laminated in two or three layers (see, for example, Patent Document 1) In addition, a water-stopping material 3 (see, for example, Patent Document 2) having a substantially semi-elliptical cross section by an open-cell foam has been proposed.

JP 2003-155708 A JP 2003-155709 A

  However, conventionally, after the waterproof material 3 is constructed on the upper surface of each main girder 2, the precast floor slab 4 is placed on the upper side of each main girder 2, and then the upper surface of each main girder 2 and the precast Since the concrete 5 is filled in the space between the floor slab 4 and the water stop materials 3 compressed at both edges in the width direction of the main girders 2, The period from construction to placing of concrete 5 is long, so during this period the precast floor slab 4 expands and contracts in the width direction of the bridge, that is, in a direction perpendicular to the longitudinal direction of the main girder 2 due to temperature changes, etc. Then, as described above, there is an example in which the water blocking material 3 whose upper surface side is in close contact with the lower surface of the precast floor slab 4 is deviated from the initial attachment position on the upper surface of the main girder 2 and peeled off. This is the actual situation.

  Therefore, in the place where the water-stopping material 3 is displaced and peeled off, in order to prevent the leakage of the concrete 5 from the place, it is necessary to repair the water-stopping material 3 that has shifted before the concrete 5 is placed. Therefore, this repair work takes time and effort.

  In recent years, after the precast floor slab 4 is placed on the upper side of the main girder 2, the precast floor is placed on the main girder 2 in order to adjust the finished height of the existing structure or the precast floor slab 4. It has been desired to have a structure in which the height of the plate 4 can be changed by several tens of millimeters in the vertical direction. However, the above-mentioned conventional water-stopping material 3 is affixed on the main girder 2, and the precast floor slab 4 is placed from above and compressed to the required dimensions, thereby forming the formwork when filling concrete. Because it is designed to demonstrate alternative strength and leakage prevention performance, changing the height of the precast slab 4 above the main girder 2 will result in insufficient compression and initially set concrete There is a possibility that the strength as a mold at the time of filling cannot be sufficiently exhibited.

  Therefore, the present invention has a long period from placing the precast floor slab on the main girder until the concrete placing work for fixing the precast floor slab to the main girder. Even if there is a difference in behavior due to temperature changes, etc., between the girder and the precast slab placed on it, it is possible to prevent the water-stopping material from shifting or peeling off. It is an object of the present invention to provide a post-installation construction method and device for a water-stopping material that can easily cope with a method of changing the height.

The present invention, in order to solve the above problems, in correspondence to claim 1, the upper side of the main girder, and location mounting the precast slab through Susozuke height adjustable fixing bracket, net with該裾A gap is provided between the precast floor slab supported by the variable fixing bracket and the main girder, and then a water stop material is inserted into the gap between the main girder and the precast floor slab. It arrange | positions to the width direction both ends edge part of an upper surface, respectively, Then, the said water stop material is made to expand according to the dimension of the clearance gap changed with the said skirt height-variable fixing bracket, and the upper surface of the said main girder. It is a post-installation method for water-stopping material that is in close contact with the lower surface of the precast floor slab.

  Further, as the water-stopping material in the above configuration, a water-stopping material having elasticity and having a round cross-sectional outer shape is used, and the water-stopping material is compressed in the gap between the main girder and the precast floor slab. After being inserted while rolling, the water-stopping material in a compressed state is expanded so as to be restored to the initial shape, thereby closely contacting the upper surface of the main girder and the lower surface of the precast slab.

  Similarly, as the water-stopping material in the above configuration, using a water-stopping material that is provided with an air injection valve at a required portion of a tube body that extends linearly and is closed at both ends, the water-stopping material is used as the main girder. So that the water-stopping material is in intimate contact with the upper surface of the main girder and the lower surface of the precast floor slab To do.

Further, in accordance with claim 4, the installation height variable type capable of freely adjusting the size of the gap by supporting the main girder and the precast floor slab placed on the upper side of the main girder with a gap. Placed in the gap between the fixing bracket and the main girder and the precast floor slab, and follows the size of the gap changed by the hem height adjustable fixing bracket on the upper surface of the main girder and the lower surface of the precast floor slab a water stopping material that is to be able to expand so as to be able to adhere to the last-construction unit waterproof material having provided comprising configure.

  Further, the water-stopping material in the above configuration is configured to be a water-stopping material having elasticity and having a round cross-sectional outer shape.

  Similarly, the water-stopping material in the above configuration is configured as a water-stopping material that is provided with an air injection valve at a required portion of a tube body that extends linearly and is closed at both ends.

According to the present invention, the following excellent effects are exhibited.
(1) on the upper side of the main girder, and location mounting the precast slab through Susozuke height adjustable mounting brackets, precast floor slab supported at the height adjustable mounting brackets with該裾and the said main girder a gap is provided between, then, the gap between the main beam and the precast slab, by inserting a water stopping material is arranged in the both widthwise end edges of the upper surface of the main beam, after which the stop Introducing water-stopping material that causes the water material to inflate following the size of the gap that is changed by the hem height-variable fixing bracket and to adhere to the upper surface of the main girder and the lower surface of the precast floor slab Since there is a construction method and apparatus, even if a difference in behavior occurs between the main girder and the precast floor slab due to expansion and contraction due to temperature change after placing the precast floor slab on the upper side of the main girder, the main girder and the precast floor slab If it is before inserting the water stop material in the gap, It does not affect the wood. Therefore, the construction of the water stop material between the main girder and the precast slab is performed immediately before the concrete is placed between the main girder and the precast slab. The difference in behavior between the girders and the precast slab can eliminate the possibility of adverse effects such as displacement and peeling on the water-stopping material.
(2) Since the water-stopping material is in contact with the upper surface of the main girder and the lower surface of the precast slab by being expanded in a state of being arranged in the gap between the main girder and the precast slab, the steel structure In addition, it can follow the unevenness of the surface of the concrete structure well, and a high water stop effect can be obtained.
(3) While using a water-stopping material having elasticity and a round cross-sectional outer shape as the water-stopping material, compressing the water-stopping material into the gap between the main girder and the precast slab After being inserted in a rolling manner, the compressed water-stopping material is expanded so as to be restored to its initial shape, thereby being in close contact with the upper surface of the main girder and the lower surface of the precast slab, It becomes possible to facilitate the operation of inserting the water stop material into the gap between the main beam and the precast floor slab. In addition, since the outer shape of the cross-sectional shape of the water-stopping material is circular, the height dimension in the vertical direction can be made substantially constant over the entire length in the longitudinal direction even if some twisting occurs. Therefore, even if the main girder and the precast floor slab are inserted into the gap between the main girder and the precast floor slab, they are inserted into the gap between the main girder and the precast floor slab so as to be compressed from above and below. The compressibility of the water material can be made uniform in the longitudinal direction.
(4) As the water-stopping material, using a water-stopping material that is provided with an air injection valve at a required portion of the tube body that extends linearly and is closed at both ends, the water-stopping material is used as the main girder and the precast floor. A structure in which the water-stopping material is brought into close contact with the upper surface of the main girder and the lower surface of the precast floor slab by inserting air into the tube body after being inserted in a state where the air is removed from the space between the plate and the plate. Thus, the water-stopping material can be easily inserted into the gap between the main girder and the precast slab simply by evacuating the air and keeping it flat. It is possible to further reduce the labor required for the work for disposing at a predetermined position in the gap between the beam and the precast slab.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  1 (a) (b) (c) and FIG. 2 (b) (b) show an embodiment of the post-installation construction method and device of the water-stopping material of the present invention. On the upper side, the precast floor slab 4 is placed via the installation height variable fixing bracket 6. Next, the precast floor slab 4 is supported by the installation height variable fixing bracket 6, and the gap 7 provided between the upper surface of the main girder 2 and the lower surface of the precast floor slab 4 is used for post-installation work. The water-stopping material 8 is inserted, and the water-stopping material 8 is arranged at positions corresponding to both end edges in the width direction on the upper surface of the main girder 2, so that the lower ends of the water-stopping materials 8 are While making it closely_contact | adhere to the upper surface of the main girder 2, the upper end part of each water-stop material 8 is closely_contact | adhered to the lower surface of the precast floor slab 4. FIG. Thereby, when each water-stopping material 8 is filled with concrete 5 between the main girder 2 and the precast floor slab 4 and placed in a later step, the water-stopper can prevent leakage of the concrete 5. To be able to demonstrate.

  Here, the post-installation construction device for the water-stopping material will be described. The post-installation construction device for the water-stopping material is the installation for forming the required gap 7 between the main girder 2 and the precast floor slab 4. It is set as the structure which comprises the height-variable fixing metal fitting 6 and the water stop material 8 for post-installation construction.

  Specifically, the installation height variable type fixing bracket 6 is formed on the upper side of the main girder 2 at the center in the width direction of the upper surface of the main girder 2, for example, as shown in FIGS. In a position corresponding to each of the precast floor slabs 4 to be arranged side by side in the bridge axis direction, a stud member 9 extending in the vertical direction and having an external thread (not shown) engraved on the outer peripheral surface is disposed, The lower end of the stud member 9 is fixed to the upper surface of the main girder 2 by welding or the like. A height adjusting nut 10 is screwed onto the external thread portion of the outer peripheral surface of the stud member 9, and the height adjusting nut 10 is arranged at the lower portion of the stud member 9. Further, the through hole 12 of the precast floor slab connecting member 11 provided with the through hole 12 in the vertical direction is loosely fitted to the outer periphery of the upper portion of the stud member 9 protruding upward from the height adjusting nut 10. The fixing nut 13 is screwed to the upper end portion of the stud member 9 protruding above the precast slab connecting member 11. Thereby, when the precast floor slab 4 is placed on the upper side of the main girder 2, the shape retaining material 4a of the precast floor slab 4 is fixed to the installation height variable fixing bracket 6 provided on the main girder 2. After placing the precast floor slab connecting member 11 so as to contact one side of the bridge axis direction (perpendicular to the paper surface in FIG. 1 (a)), the precast floor slab connecting member 11 and the precast floor slab 4 The precast floor slab connecting member 11 which is connected to the upper side of the height adjusting nut 10 attached to the lower part of the stud member 9 by connecting the shape holding member 4a with a bolt 14 and a nut 15 penetrating both. The precast floor slab 4 is supported integrally. Further, the height of the precast floor slab 4 on the main girder 2 is changed by changing the mounting position of the height adjusting nut 10 in the vertical direction and changing the height position of the upper end of the height adjusting nut 10. The position can be adjusted freely. After adjusting the height position of the precast floor slab 4 on the main girder 2 as described above, the fixing nut 13 screwed to the upper end of the stud member 9 is attached to the precast floor slab connecting member. 11 is fastened so as to be in contact with the upper end portion of the plate 11 so that the upward displacement of the precast floor slab connecting member 11 is restrained so that the vertical position of the precast floor slab 4 can be fixed.

  As shown in FIG. 1C, the water-stopping material 8 for post-installation construction is made of, for example, an open-cell foam rubber, and has a round cross-sectional outer shape and a hollow water-stopping material 8. The water stop material 8 has a diameter larger than that of the gap 7 between the main beam 2 into which the water stop material 8 is to be inserted and the precast floor slab 4. As a result, the water-stopping material 8 has a round outer shape so that the main girder 2 and the precast floor slab 4 supported on the upper side thereof via the installation height-variable fixing bracket 6 are provided. The water-stopping material 8 can be inserted into the gap 7 while being compressed while being rolled, so that the insertion work can be facilitated. Furthermore, the water-stopping material 8 has a round cross-sectional outer shape, so that the vertical dimension of the cross-sectional shape is kept substantially uniform over the entire length in the longitudinal direction even if some twisting occurs in the longitudinal direction. Therefore, when the water-stopping material 8 is inserted into the gap 7 between the main girder 2 and the precast floor slab 4 as described above, twisting is caused in the longitudinal direction of the water-stopping material 8. Even if it occurs to some extent, the degree of compression of the water-stopping material 8 that is compressed in the vertical direction by being inserted into the gap 7 between the main beam 2 and the precast floor slab 4 is made uniform in the longitudinal direction. It is. Therefore, when the water-stopping material 8 is inserted into the gap 7 between the main girder 2 and the precast floor slab 4 and arranged at positions corresponding to both edges in the width direction on the upper surface of the main girder 2, The water material 8 is brought into close contact with the upper surface of the main girder 2 and the lower surface of the precast floor slab 4 due to the restoring force when attempting to expand from the compressed state to the initial shape.

  The water blocking material 8 inserted and arranged in the gap 7 between the main girder 2 and the precast floor slab 4 as described above is obtained by using a double-sided tape or a sealing material (not shown) and the upper surface of the main girder 2 and the lower surface of the precast floor slab 4. You may make it fix.

  In addition, since the water-stopping material having a rectangular cross section as used in the past is difficult to roll while being compressed, the precast floor slab placed on the main girder 2 and the fixed height fixing bracket 6 on the upper side thereof. It is difficult to insert the water-stopping material having the rectangular cross section into the gap 7 with respect to 4 later. In addition, when the water-stopping material having the rectangular cross section is twisted, the vertical dimension of the cross-sectional shape is not uniform in the longitudinal direction, so that the water-stopping material having the rectangular cross-section is twisted in the vertical direction. When compressed to a predetermined size, the compression rate becomes non-uniform in the longitudinal direction, which may cause a problem with water stoppage. However, it is possible to eliminate all such disadvantages by using the water-stopping material 8 having a round cross-sectional outer shape.

  For convenience of illustration, the description of the concrete 5 is omitted in FIGS.

  When the bridge construction work using the precast floor slab is carried out by using the post-installation construction device for the water stop material having the above structure, the main girder 2 extending in the bridge axis direction on the pier 1 is provided with a necessary interval in the width direction. After installing a plurality of spaces, the precast floor slab 4 extending in the width direction across the main girders 2 is placed on the upper side of the main girders 2 via the fixed installation height type fixing bracket 6.

  Next, before the concrete 5 is placed between the upper surface of each main girder 2 and the precast floor slab 4 thereabove, the main girder 2 in the gap 7 between the main girder 2 and the precast floor slab 4 is arranged. The water-stopping material 8 for post-installation work is inserted while being compressed at locations corresponding to both edge portions in the width direction of the water-stopping material, and the water-stopping material 8 is attached by a restoring force from the compressed state of the water-stopping material 8. The main girder 2 is brought into close contact with the upper surface of the main girder 2 and the lower surface of the precast floor slab 4.

  Thereafter, a water leak test is performed on the water stop material 8 adhered to the upper surface of the main beam 2 and the lower surface of the precast floor slab 4 as described above. As shown in FIG. 1 (c), a wedge-shaped gap formed between the lower part of the water-stopping material 8 whose outer shape of the cross-sectional shape is round and the upper surface of the main girder 2 below the part, And the side where concrete 5 is placed in a wedge-shaped gap formed between the upper part of the water-stopping material 8 and the lower surface of the precast floor slab 4 above, that is, each main girder Sealing is performed by filling the sealing material 16 from the center in the width direction 2.

  Thereafter, the concrete 5 is placed in the space surrounded by the water stop material 8 arranged at the upper surface of each main girder 2, the lower surface of the precast floor slab 4, and both end edges in the width direction of each main girder 2. To fill. As a result, the precast floor slab 4 and the main beam 2 are fixed.

  Thus, according to the post-installation construction method and apparatus of the water-stopping material of the present invention, after the precast floor slab 4 is placed on the upper side of the main girder 2, the main girder 2 and the precast floor slab 4 are changed by temperature change or the like. Even if a difference in behavior occurs, the water stop material 8 is inserted into the gap 7 between the main girder 2 and the precast floor slab 4 and then applied. By performing the operation immediately before the concrete 5 is placed between the main girder 2 and the precast floor slab 4, the behavior difference between the main girder 2 and the precast floor slab 4 is reduced in the waterstop material 8. The possibility of adverse effects such as displacement and peeling can be eliminated.

  Further, since the water-stopping material 8 has a round cross-sectional outer shape made of open-cell foam rubber, as shown in FIGS. Even when the height position of the precast floor slab 4 on the main girder 2 is changed by operating the height adjusting nut 10, the size of the gap 7 between the main girder 2 and the precast floor slab 4 is increased. The reduction can be followed like a spring, and a healthy water stop effect can be maintained.

  Further, the water blocking material 8 is brought into close contact with the upper surface of the main girder 2 and the lower surface of the precast floor slab 4 by a restoring force when attempting to restore the initial shape as a circular cross-sectional shape from a state compressed in the vertical direction. Therefore, the surface of the steel structure or concrete structure in the main girder 2 or the precast floor slab 4 can be satisfactorily followed, and a high water stop effect can be obtained.

  Furthermore, since the water-stopping material 8 has a round cross-sectional outer shape, the water-stopping material 8 is shown in FIG. 8 and a wedge-shaped gap formed between the lower part of the main girder 2 below and the upper part of the water stop material 8 and the lower surface of the precast floor slab 4 above it. Sealing can be performed by filling the sealing material 16 in two places above and below the wedge-shaped gap. Therefore, as shown in FIG. 5, as a comparison, at a place where water leakage has occurred in the water-stopping material 3 having a rectangular cross section as used in the prior art, the main girder 2 and the precast are applied to the water-stopping material 3 in a later process. It has been necessary to perform sealing by filling the sealing material 16 over the entire surface in the vertical direction from the side where the concrete 5 for fixing the floor slab 4 is placed, that is, from the width direction central portion side of each main girder 2. In contrast, according to the water blocking material 8, it is possible to stop water more easily with a small amount of the sealing material 16.

  Next, FIG. 3 (I) (B) and FIG. 4 (I) (B) show another example of a water stop material for post-installation construction as another embodiment of the present invention. It is like that.

  That is, as shown in FIGS. 3 (a) and 3 (b), a material having a required elasticity that extends in a straight line and has both ends closed, for example, a required portion in the longitudinal direction of a rubber tube body 17, for example, An air injection valve 18 is provided to constitute a water stop material 8a for tube-type post-installation work.

  The tube body 17 is formed in a straight tube shape using the same material as that of the bicycle tire tube defined in JISK6304.

  Further, a required portion in the longitudinal direction of the tube body 17, for example, an outer tire surface near one end in the longitudinal direction, is the same as an automobile tire valve specified in JIS D4207 or a bicycle tire valve specified in JIS D9422. The air injection valve 18 is attached.

  When the bridge construction work using the precast floor slab is performed using the water stop material 8a for the post-installation construction having the above-described configuration, the main structure installed on the pier 1 is the same as in the above embodiment. Before placing the precast floor slab 4 on the upper side of the girder 2 via the fixed height fixing bracket 6 and then placing the concrete 5 between the upper surface of the main girder 2 and the precast floor slab 4 The tube-type post-installation water-stopping material 8a, which has been previously evacuated from the air in the tube body 17 to have a flat state as shown in FIGS. It is inserted into the gap 7 between the girder 2 and the precast floor slab 4, and is arranged at a location corresponding to both end edges in the width direction of the main girder 2.

  The flat water-stopping material 8a disposed at the predetermined location is such that the central portion in the width direction on the lower surface side of the tube body 17 is attached to the upper surface of each main girder 2 with a double-sided tape or a sealing material (not shown). desirable. At this time, when the length dimension of the tube-type water blocking material 8a as the required length dimension is filled with the concrete 5 between the upper surface of the main girder 2 and the precast floor slab 4 thereabove in the subsequent process. If the size of the area that needs to be sealed in the bridge axis direction is insufficient, the waterstops 8a are successively arranged in series along the widthwise both edges of the upper surface of each main girder 2 and pasted. Try to put it on.

  Thereafter, immediately before the concrete 5 is placed between the upper surface of each main girder 2 and the precast floor slab 4 thereabove, a compressor (not shown) or the like is connected to the air injection valve 18 of the tubular water-stopping material 8a. By connecting a pressurized air supply source such as an air cylinder and injecting pressurized air into the tube body 17 through the air injection valve 18, the tube body 17 is connected to the main body as shown in FIG. Expansion is performed in a gap 7 between the girder 2 and the precast floor slab 4. Thereby, the lower end portion of each expanded tube body 17 is brought into close contact with the upper surface of the main girder 2, and the upper end portion of each expanded tube body 17 is brought into close contact with the lower surface of the precast floor slab 4. Become.

  After inflating the tube-type water-stopping material 8a as described above, the tube-type water-stopping materials 6 arranged in series along both end edges in the width direction of the upper surface of each main girder 2 are adjacent to each other. As shown in FIG. 4 (b), the ends are pasted with a sealing material 16 such as a modified silicone, and water stopping and fixing between the adjacent ends of each of the tube-type water stopping materials 6 are performed. .

  Thereafter, a water leak test was performed on each tubular water-stopping material 6 in contact with the upper surface of the main girder 2 and the lower surface of the precast floor slab 4 by inflating as described above. In this case, as shown in FIG. 4 (a), the water leaking portion is similar to that shown in FIG. 1 (c), and the lower portion of the expanded water-stopping material 8a and the main girder below it. 2 and a wedge-shaped gap formed between the upper portion of the expanded water-stopping material 8a and the lower surface of the precast floor slab 4 above the wedge-shaped gap. In a later step, the sealing is performed by filling the sealing material 16 from the side where the concrete 5 is placed, that is, from the center in the width direction of each main girder 2.

  Thereafter, in the same manner as in the above embodiment, the upper surface of the main girder 2, the lower surface of the precast floor slab 4, and the water stop material 8a expanded at both edges in the width direction of the main girder 2 are surrounded. The space is filled with concrete 5 so that the precast floor slab 4 is fixed to the main girder 2.

  In this way, the water stop material 8a for post-installation construction that is a tube type is configured such that the outer shape of the cross-sectional shape becomes a round shape by injecting air. The effect similar to the said embodiment can be acquired by performing the post-installation construction of the water stop material 8a.

  Furthermore, the water-stopping material 8a for post-installation construction, which is a tube type, can be easily inserted into the gap 7 between the main girder 2 and the precast floor slab 4 by simply removing the air and keeping it flat. Thus, it is possible to further reduce the labor required for the work for disposing at a predetermined position in the gap 7 between the main beam 2 and the precast floor slab 4.

  In addition, this invention is not limited only to the said embodiment, The diameter dimension and thickness of the water stop material 8 at the time of expansion | swelling by the air injection of the water stop material 8a, and thickness are as follows. The vertical dimension of the gap 7 provided between the main girder 2 and the precast floor slab 4 and the magnitude of the force desired to make good contact with both the upper surface of the main girder 2 and the lower surface of the precast floor slab 4 It may be changed as appropriate according to the situation.

  From the viewpoint of reducing the material cost, the water-stopping material 8 having a round outer shape of the cross-sectional shape in the embodiment of FIGS. 1 (a), (b), and (c) and FIGS. Although it is desirable to be hollow, a solid water-stopping material may be used.

  3 (a) (b) and FIG. 4 (b) (b), the air injection valve 18 of the water stop material 8a for tube post-installation work is used before the water stop material 8a is used. In the state where the air in the tube body 17 can be maintained in a flat state where the air has been removed and pressurized air of a required pressure is injected into the tube body 17 via the air injection valve 18, the outflow of air from the inside to the outside is prevented. Any type of air injection valve other than a vehicle tire valve specified in JIS D4207 or a bicycle tire valve specified in JIS D9422 may be used as long as it has a check valve function. Further, the installation position of the air injection valve 18 in the longitudinal direction of the water blocking material 8a may be changed as appropriate. As the material of the tube body 17, any material other than the material similar to the bicycle tire tube defined in JISK6304 is adopted as long as it is flexible and can withstand the pressure of air injected into the tube body 17. May be. When the water blocking material 8a is inflated by injecting air as shown in FIG. 4 (a), the portion which becomes the upper end portion of the tube body 17 is precast floor slab 4 with a double-sided tape or a sealing material (not shown). You may make it fix to the lower surface of.

  The installation height variable type fixing bracket 6 can support the precast floor slab 4 on the upper side of the main girder 2 with a required gap 7 therebetween, and the height position of the precast floor slab 4 on the main girder 2 can be freely set. The lower end portion of the stud member 9 may not be fixed to the upper surface of the main girder 2, and a male screw (not shown) engraved on the outer peripheral surface of the stud member 9 may be used. The height adjusting mechanism 6 of any type other than that shown in the figure other than the height adjusting mechanism other than the height adjusting mechanism other than the height adjusting mechanism by the height adjusting nut 10 screwed on the male screw may be adopted. You may make it use.

  Of course, various modifications can be made without departing from the scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of a post-installation construction method and apparatus for a water-stopping material according to the present invention, in which (A) is a schematic front view, (B) is an enlarged view taken along the line AA in (A), ) Is an enlarged view of a portion B of (A). This shows the state of the water stop material for post-installation work inserted into the gap between the main girder and the precast floor slab. (A) shows the case where the distance between the main girder and the precast floor slab is wide, (b) shows the main It is a schematic diagram which respectively shows the case where the space | interval of a girder and a precast floor slab is narrow. As another form of implementation of this invention, another example of the water stop material for post-installation construction is shown, (A) is a schematic perspective view, (B) is a CC direction arrow view of (A). It is. FIG. 4 is a diagram for explaining a method of using a water stop material for post-installation construction in FIG. 3, (a) is an expanded state of the water stop material arranged in the gap between the main girder and the precast floor slab (Ro ) Is a schematic view showing a state in which the adjacent ends of the tubular water-stopping materials arranged in series are water-stopped and fixed, respectively. It is a schematic diagram which shows the state which seals the location which the water leak produced in the water stop material of the rectangular cross-sectional shape used conventionally. It is a schematic perspective view which shows the fixation structure of the conventional main girder and a precast floor slab.

Explanation of symbols

2 Main girder 4 Precast floor slab 6 Mounting height variable fixing bracket 7 Clearance 8, 8a Water stop material 17 Tube body 18 Air injection valve

Claims (6)

On the upper side of the main girder, Susozuke through height adjustable mounting brackets and location mounting the precast slab, between the precast slab and the main beam which is supported at the height adjustable mounting brackets with該裾A gap is provided , and then, a water-stopping material is inserted into the gap between the main girder and the precast floor slab and arranged at both edges in the width direction of the upper surface of the main girder. The waterstop is characterized in that it is inflated by following the size of the gap that is changed by the hem height-variable fixing metal fitting so as to be in close contact with the upper surface of the main girder and the lower surface of the precast floor slab. Post-installation construction method.   As the water-stopping material, use a water-stopping material that has elasticity and has a round cross-sectional outer shape, and rolls the water-stopping material while compressing it in the gap between the main girder and the precast floor slab. The water-stopping material according to claim 1, wherein the water-stopping material in a compressed state is inflated so as to be restored to its initial shape, thereby closely contacting the upper surface of the main girder and the lower surface of the precast slab. Post-installation construction method.   As the water-stopping material, using a water-stopping material that is provided with an air injection valve at a required portion of the tube body that extends linearly and is closed at both ends, the water-stopping material is connected to the main girder and the precast slab. 2. The water-proof material according to claim 1, wherein the water-stopping material is brought into close contact with the upper surface of the main girder and the lower surface of the precast floor slab by inserting air into the tube body after being inserted in a state where air is extracted from the gap. After-installation method for water-stopping material. A fixed height fixing bracket that supports a main girder and a precast floor slab placed on the upper side of the main girder with a gap therebetween and can freely adjust the size of the gap, and the main girder and the precast floor Place it in the gap with the plate and expand it so that it can be brought into close contact with the upper surface of the main girder and the lower surface of the precast floor slab by following the size of the gap that can be changed by the hem height-variable fixing bracket. Post-Assembly construction system of water stopping material characterized by having a composed and a water stopping material that is to allow configuration.   The post-installation construction device for a water-stopping material according to claim 4, wherein the water-stopping material is a water-stopping material having elasticity and having a round cross-sectional outer shape.   The water stop material post-installation construction apparatus according to claim 4, wherein the water stop material is a water stop material that is provided with an air injection valve at a required portion of a tube body that extends linearly and is closed at both ends.

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