JP2007198119A - Concrete waterway joint part water shut off structure and water shutting-off construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a concrete waterway joint part water shut off structure superior in water leakage preventive performance, and without causing a crack from a joint part, for performing construction work even in a state of including moisture in a backing, by water shut-off repairing the joint part without removing an existing sealing material. <P>SOLUTION: This water shut off structure of a concrete waterway joint part stops water leakage from the joint part 2 of mutual waterway members 1 of a waterway formed by arranging a plurality of concrete waterway members in the longitudinal direction, and is formed by layering and arranging an adhesive layer 3 composed of at least cement and a resin emulsion, a waterproof sheet 4 and a surface layer 5 composed of at least cement and a resin emulsion in this order on the periphery including the joint part 2 of an inner surface of the waterway members 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a water-impervious structure of a joint part formed between waterway members of a waterway made of concrete and arranged with U-shaped waterway members side by side. The present invention relates to a joint impermeable structure that can be used.

  Conventionally, a U-shaped concrete water channel member is often used as an agricultural, industrial, or general irrigation channel or drainage channel in such a manner that it is embedded in the ground. A fixed-length water channel member is extended in series, and the joint portion is used, for example, by interposing a sealing material made of an asphalt composition or the like so as not to leak water.

  However, the concrete channel can crack in the channel member within a relatively short period of time due to the behavior of the ground in which the channel is embedded, the drying shrinkage of the concrete due to the weather, and the expansion and contraction of the concrete accompanying changes in the environmental temperature. was there. Further, as described above, since the water channel members having a certain length are arranged and extended in the longitudinal direction to form a long water channel, there is a joint portion between the water channel members. In order to seal the joints, paste-type sealing materials such as wood sandwiched, asphalt pitch poured, butyl, acrylic or silicon are used. These are cases where the water stop treatment cannot be said to be complete, those that cannot follow the expansion and contraction of waterway members due to changes in humidity and temperature as described above, and cases where the seal function cannot be performed due to deterioration or hardening of the material. Due to various factors, leakage of water from the joints was inevitable.

  In the case of such concrete canals, once water leaks due to the occurrence of cracks or deterioration of the sealability of joints, the earth and sand under the canals are eroded, and the amount of water leaks increases due to the growth of cracks. Had collapsed. In particular, when there are private houses near the waterway, it was a very dangerous problem. For example, Patent Document 1 can be cited as a seal for joints between water channel members.

  Patent Documents 2 and 3 disclose a type that obtains a sealing effect by inserting a mold member made of rubber or the like into a joint.

Japanese Utility Model Publication No. 64-41505 Japanese Utility Model Publication No. 57-193799 JP 2005-282180 A

  For example, in order to repair with a sealing material as described in Patent Document 1, it may be necessary to remove the existing sealing member basically, which takes time and the base is moisture. In a state that includes, the construction cannot be performed, and there is a problem that the construction period is postponed or extended depending on the weather.

  A sealing member of a mold as shown in Patent Document 2 and Patent Document 3 that is inserted into the joint portion to ensure sealing performance is easy to mount on the joint portion. The sealing function is achieved at the portion where the water channel or the wall is in contact, and it may be considered that the function of preventing water leakage is somewhat inferior to a sealing material that injects a paste-like material, depending on the case. Moreover, when using for the purpose of repair, since it cannot insert until it removes the existing sealing material, there exists a problem that construction also takes time.

  Therefore, in the present invention, it is possible to repair the seal of the joint portion without removing the existing sealing material, and it is possible to perform the construction work even in a state where the base contains moisture, and also to prevent water leakage. It is an object to provide a concrete water channel joint water-impervious structure with less occurrence of cracks from excellent joints.

  In order to solve such a problem, in Claim 1 of the present invention, the water shielding of the concrete water channel joint portion that stops leakage from the joint portion of the water channel members of the water channel formed by arranging a plurality of concrete water channel members in the longitudinal direction. The structure is characterized in that an adhesive layer made of at least cement and a resin emulsion, a waterproof sheet, and a surface layer made of at least cement and a resin emulsion are laminated in the order including the joints on the inner surface of the water channel member.

  In Claim 2, it is set as the concrete waterway joint part water-impervious structure of Claim 1 which made the compounding quantity of the cement and resin emulsion of an adhesive layer the range of 100 / 20-100 / 200 by solid content ratio of cement / resin emulsion. .

  In Claim 3, the amount of cement of the surface layer and the resin emulsion is in the range of 100/60 to 100/30 in terms of solid content ratio of cement / resin emulsion. It is said.

  In Claim 4, in the water-impervious structure of the concrete water channel joint portion that stops water leakage from the joint portion of the water channel members of the water channel formed by arranging a plurality of concrete water channel members in the longitudinal direction, the periphery including the joint portion on the inner surface of the water channel member And an adhesive layer made of an epoxy resin, a waterproof sheet, and at least a surface layer made of cement and a resin emulsion.

  Further, according to claim 5, in the water-blocking method for the concrete water channel joint portion that stops leakage from the joint portion between the water channel members of the water channel formed by arranging a plurality of concrete water channel members in the longitudinal direction, the joint portion on the inner surface of the water channel member is included. An adhesive layer made of at least cement and a resin emulsion is applied to the periphery, a waterproof sheet is stuck thereon, and then a surface layer made of at least cement and a resin emulsion is applied.

  In Claim 6, it is set as the concrete waterway joint part water-impervious construction method of Claim 4 which made the compounding quantity of the cement and resin emulsion of an adhesive layer the range of 100 / 20-100 / 200 by solid content ratio of cement / resin emulsion. .

  In Claim 7, the amount of cement of the surface layer and the resin emulsion is in the range of 100/60 to 100/30 in terms of solid content ratio of cement / resin emulsion. It is said.

  In Claim 8, in the water-blocking construction method of the concrete water channel joint part which stops leakage from the joint part of the water channel members of the water channel formed by arranging a plurality of concrete water channel members in the longitudinal direction, the periphery including the joint part on the inner surface of the water channel member An adhesive layer made of an epoxy resin is applied to the substrate, a waterproof sheet is stuck thereon, and then a surface layer made of at least cement and a resin emulsion is applied.

  In claim 1 and claim 5, it is composed of an adhesive layer made of cement and a resin emulsion around the joints between the concrete channel members, and a waterproof sheet, a surface layer made of cement and a resin emulsion, Since the existing seal can be installed on top of it without removing it, less work is required and the adhesive layer is hydrated and solidified so that the area around the joint and the existing seals contain moisture However, construction work can be performed without having to wait for drying without being influenced by the weather, and the adhesive layer is arranged so as to cover the entire joint part, so that the reliability of waterproof performance can be improved. it can.

  In claim 2 and claim 6, the composition of the cement and the resin emulsion in the adhesive layer is in the range of 100/20 to 100/200 in terms of the solid content ratio of the cement / resin emulsion, so that the adhesive layer itself contains water. Since the performance which does not pass can be provided, the double waterproof effect by an adhesive layer can be acquired with the waterproofing by a waterproof sheet.

  In claim 3 and claim 7, the composition of the cement and the resin emulsion in the surface layer is in the range of 100/60 to 100/30 in terms of the solid content ratio of the cement / resin emulsion. The film can be sufficiently stretched without damaging the surface, and problems such as tearing or floating of the surface layer can be prevented even if the base is displaced or moved.

  In the fourth and eighth aspects, an epoxy resin is used as the adhesive layer, and the adhesiveness with the base is excellent, the waterproof performance is high, and the sealing performance of the joint portion can be made higher.

  The present invention relates to a water-blocking structure and a water-blocking method for joints 2 between water channel members 1 in a water channel formed by arranging a large number of concrete water channel members 1 in a substantially U shape as shown in FIG. It may be used to increase the water barrier property of the joint part 2 when newly installed, or may be used for repairing or repairing the joint part 2 in an aged waterway.

  The required length is formed by arranging a plurality of waterway members 1 made of concrete in the longitudinal direction when forming a waterway, but a joint portion 2 can be formed between adjacent waterway members 1 as shown in FIG. Become. The concrete waterway member 1 may expand or contract due to changes in humidity or temperature, or may be displaced due to land subsidence, etc., so a gap of about 10 to 40 mm is opened in advance and wood or asphalt is installed in the existing ceiling Filled as a material. The joint portion 2 is a portion that is particularly susceptible to water leakage, and it is preferable to reinforce the joint portion 2 when repairing.

  The joint part 2 must be prevented from leaking by any method, but it can be waterproofed by filling the joint part with paste-like sealing material S such as asphalt, butyl, acrylic or silicon. Conventionally, a waterproof seal is ensured by inserting a sealing member of a mold made of rubber or rubber into the joint.

  However, the sealing material S deteriorates with time, and if it is a water channel that has passed for a long time, the water channel member 1 itself may crack and leak, and the joint portion 2 may also leak. Often there is to do.

  In the present invention, the existing sealing material 3 is applied to the joint portion 2 of the water channel member 1 whose water-blocking performance has been lowered without being removed, and laying work is easy. The concrete waterway joint impervious structure according to the present invention includes the joint 2 and further applies an adhesive to the periphery thereof (in the range of 150 to 1000 mm from the end of the waterway member 1) to form the adhesive layer 3. The waterproof sheet 4 is disposed on the adhesive layer 3 and adhered to the joint portion and the periphery thereof through the adhesive layer 3. When the adhesion is completed and the adhesive layer 3 is cured, the surface layer 5 is applied again from above.

  In claim 1 and claim 5 of the present invention, the adhesive layer 3 is made of a polymer cement paste in which at least cement and a resin emulsion are blended, and the cement is a hydration curable powder and is commonly used as Portland cement or alumina. Cement, fly ash cement, silica cement, magnesia cement, rapid hardening cement and the like can be mentioned. As resin emulsion, ethylene vinyl acetate (EVA), modified EVA, acrylic resin, epoxy resin, urethane resin, acrylic styrene, SBR , CR and the like. Among these, it is practical and preferable to use an ethylene vinyl acetate resin in terms of adhesiveness and cost among these resin emulsions. It is better not to mix aggregates such as sand into the polymer cement paste that becomes the adhesive layer 3. When an aggregate is blended, it becomes a hard and non-stretchable layer. Therefore, when the water channel member expands and contracts due to changes in humidity and temperature, it cannot follow and cracks occur, which is not preferable. Even if aggregates are blended, it is preferably less than 50% by mass.

  And in Claim 2 and Claim 6, in mixing | blending of cement and resin emulsion, the solid content ratio of cement / resin emulsion is made into the range of 100 / 20-100 / 200, and waterproof performance is carried out to adhesive layer 3 itself. Since it can be provided, it can be waterproofed by both the waterproof sheet 4 and the adhesive layer 3, which is preferable. If the solid content of the resin emulsion is less than 100/20 at the solid content ratio, the amount of water permeation increases and water tightness is poor, which is not preferable. On the other hand, if it exceeds 100/200, it is difficult to apply to the base, and the drying time after application becomes long, which is not preferable in terms of workability.

  The coating thickness of the adhesive layer 3 is preferably about 1 to 5 mm, and the coating amount is preferably about 2 to 10 kg / m. When the thickness is less than 1 mm, anchor hardening due to unevenness on the surface of the waterproof sheet laid thereon is reduced, and sufficient waterproof performance cannot be ensured. On the other hand, if the thickness exceeds 5 mm, it takes a long time to cure.

  Although not shown, a primer may be applied to the base 2 before the adhesive layer 3 is applied to the base 2. Although not shown in the concrete surface of the foundation 2, there are usually fine holes, so when applied directly to the adhesive layer 3 made of polymer cement paste, air bubbles are generated by the air in the holes, and pinholes Such a problem can be prevented by applying a primer in advance before applying the adhesive layer 3 to the base 2. As a raw material, emulsions such as ethylene vinyl acetate (EVA), modified EVA, acrylic resin, epoxy resin, urethane resin, acrylic styrene, SBR, and CR can be used.

  In claim 3 and claim 8, the composition of the cement and the resin emulsion in the surface layer is in the range of 100/60 to 100/30 in terms of the solid content ratio of the cement / resin emulsion. The film can be sufficiently stretched without damaging the surface, and problems such as tearing or floating of the surface layer can be prevented even if the base is displaced or moved.

  In the inventions according to claims 4 and 8, an adhesive made of an epoxy resin can be used as the adhesive layer. By using a two-component curing type epoxy resin of the main agent and curing agent as an adhesive, the adhesion between the waterproof sheet and the base can be strengthened. For example, even if there is a behavior of the base, the waterproof layer is reinforced with joint reinforcement Has the ability to follow the ground without peeling off. In addition, the construction work can be performed even when the substrate is wet at the time of construction, and the bonding performance does not deteriorate.

  The material of the waterproof sheet 4 is a vulcanized rubber sheet such as ethylene / propylene / terpolymer (EPDM), butyl rubber (IIR) or a blend thereof, polypropylene, polyethylene, ethylene vinyl acetate copolymer resin, vinyl chloride resin and the like. A thermoplastic resin waterproof sheet such as a modified body may be used. The thickness is preferably about 0.5 to 3.0 mm, and a base fabric made of polyester fiber, cotton, polyamide fiber or the like embedded in rubber may be used in order to give strength so as not to break easily. In the case where the sheet is not exposed, styrene butadiene rubber, nitrile rubber, and natural rubber can be used although the weather resistance is slightly inferior. When the thickness of the waterproof sheet 4 is less than 0.5 mm, there is a problem that the sheet is broken due to insufficient strength, and when it is more than 3.0 mm, the ease of running along the ground is impaired and the workability is poor. This is not preferable.

Another example of the waterproof sheet 4 is as shown in FIG. The waterproof sheet 4 in FIG. 3 is formed by laminating a sheet body 4a made of a rubber sheet and a nonwoven fabric 4b having a basis weight of 10 to 70 g / m ^{2 on} the sheet body 4a. The waterproof sheet 4 and the adhesive layer 3 can be fixed by a physical effect or the like by impregnating the nonwoven fabric 4b with the adhesive layer 3 which is a polymer cement paste. The non-woven fabric 4b can be said to be a preferable form because it can be firmly fixed between the waterproof sheet 4 by impregnating the non-woven fabric 4b on the upper surface with the surface layer 5 by being disposed on both surfaces of the sheet body 4a. It may be only one side.

Because basis weight of the nonwoven fabric 4a is insufficient strength of the nonwoven fabric 12 is less than 10 g / m ² nonwoven fabric itself is easily broken it tends to occur peeling consists 70 g / m ² by weight, the polymer cement paste adhesion Since the impregnation of the layer 3 into the nonwoven fabric 4b becomes insufficient, the fixing force becomes small, and it becomes easy to peel between the polymer cement paste and the nonwoven fabric, which is not preferable.

  The non-woven fabric 4b can be bonded to the sheet body 4a by using the heat generated when the sheet body 4a made of rubber is vulcanized and the non-woven fabric 4b is heat-bonded by a pressure roll. Further, in order to increase the adhesive strength between the sheet main body 4a and the nonwoven fabric 4b, the fusion bonding layer 4c may be interposed in the sheet main body 4a, and the nonwoven fabric 4b may be overlapped thereon and heat-pressed. By doing so, the nonwoven fabric 4b can be easily fused to the sheet body 4a, and a sufficiently large adhesive strength can be obtained.

  Examples of the non-woven fabric 4b include materials such as polyethylene, polypropylene, polyester, and rayon, and those made of polyester are particularly preferable because they have good adhesion to the adhesive layer 3 made of polymer cement paste.

  The surface layer 5 is composed of at least a cement and a resin emulsion. However, since the surface layer 5 is a layer located on the surface, the surface layer 5 needs to have a certain degree of strength and preferably has an elongation enough to follow the movement of the ground. It is preferable that the cement and resin emulsion in the surface layer be blended in a range of 100/60 to 100/30 in terms of the solid content ratio of the cement / resin emulsion. By doing so, it is possible to have sufficient elongation without impairing the workability of the surface layer, and it is possible to prevent problems such as tearing or floating of the surface layer even if there is a displacement or movement of the groundwork it can. In addition, what is commonly called polymer cement mortar mixed with aggregates such as sand is preferable. By adding aggregates, the impact strength and other strengths can be improved, and the waterproof performance is durable. Can be increased. Examples of the cement and resin emulsion that can be used for the surface layer 5 are the same as those used for the adhesive layer 3.

  The coating thickness of the surface layer 5 is preferably about 1 to 5 mm, and the coating amount is preferably about 2 to 10 kg / m. When the thickness is less than 1 mm, anchor hardening due to unevenness on the surface of the waterproof sheet laid thereon is reduced, and sufficient waterproof performance cannot be ensured. On the other hand, if the thickness exceeds 5 mm, it takes a long time to cure.

  Like the adhesive layer 3, the surface layer 5 is preferably a layer made of a polymer cement paste that does not contain aggregates such as sand. Polymer cement mortar containing aggregates such as sand is poor in stretchability, and cracks are likely to occur at joints when the channel member 1 expands and contracts due to the influence of humidity and temperature. Although waterproofness is maintained by the adhesive layer 3 and the waterproof sheet 4, the occurrence of cracks is not preferable in terms of appearance. Compared with that, since the polymer cement paste not containing the aggregate has elasticity, it can follow the expansion and contraction of the water channel member 1 and can prevent the occurrence of cracks, thereby deteriorating the appearance. There is nothing.

  Hereinafter, a test specimen was prepared by changing the blending ratio of the surface layer 5, the applicability was evaluated, the physical properties were measured, and the comparative test was performed by observing the appearance of the protective layer.

Example 1
As shown in Table 1, the ratio of 100: 150 powder (PX powder manufactured by Mitsuboshi Belting) containing 50% cement to 45% solid resin emulsion (WD primer A manufactured by Mitsuboshi Belting) The blended material was used as a surface layer, and a JIS No. 1 dumbbell was cured for 7 days at room temperature. The results are shown in Table 2. Further, a surface layer was applied to a concrete base with a thickness of 50 mm and cured at room temperature for 7 days to obtain a specimen having a width of 100 to 340 mm. A crack having a width of 5 mm was generated on the base, and the appearance of the surface layer was observed. The results are shown in Table 3.

(Example 2)
As shown in Table 1, the blending ratio of powder containing 50% cement (PX powder manufactured by Mitsuboshi Belting) to resin emulsion (WD primer A manufactured by Mitsuboshi Belting) having a polymer solid content of 45% is 100: A test specimen was prepared in exactly the same manner as in Example 1 except that 175. Table 2 shows the results of the tensile test and applicability evaluation. Further, a surface layer was applied to a concrete base with a thickness of 50 mm and cured at room temperature for 7 days to obtain a specimen having a width of 100 to 340 mm. A crack having a width of 5 mm was generated on the base, and the appearance of the surface layer was observed. The results are shown in Table 3.

(Example 3)
As shown in Table 1, the blending ratio of powder containing 50% cement (PX powder manufactured by Mitsuboshi Belting) to resin emulsion (WD primer A manufactured by Mitsuboshi Belting) having a polymer solid content of 45% is 100: A test specimen was prepared in exactly the same manner as in Example 1 except that it was changed to 200. Table 2 shows the results of the tensile test and applicability evaluation. Further, a surface layer was applied to a concrete base with a thickness of 50 mm and cured at room temperature for 7 days to obtain a specimen having a width of 100 to 340 mm. A crack having a width of 5 mm was generated on the base, and the appearance of the surface layer was observed. The results are shown in Table 3.

Example 4
As shown in Table 1, the blending ratio of powder containing 50% cement (PX powder manufactured by Mitsuboshi Belting) to resin emulsion (WD primer A manufactured by Mitsuboshi Belting) having a polymer solid content of 45% is 100: A test specimen was prepared in exactly the same manner as in Example 1 except that 250 was used. Table 2 shows the results of the tensile test and applicability evaluation.

(Example 5)
As shown in Table 1, the blending ratio of powder containing 50% cement (PX powder manufactured by Mitsuboshi Belting) to resin emulsion (WD primer A manufactured by Mitsuboshi Belting) having a polymer solid content of 45% is 100: A test specimen was prepared in exactly the same manner as in Example 1 except that 300 was used. Table 2 shows the results of the tensile test and applicability evaluation.

(Comparative Example 1)
As shown in Table 1, the blending ratio of powder containing 50% cement (PX powder manufactured by Mitsuboshi Belting) to resin emulsion (WD primer A manufactured by Mitsuboshi Belting) having a polymer solid content of 45% is 100: A test body was prepared in the same manner as in Example 1 except that the number was 50. Table 2 shows the results of the tensile test and applicability evaluation.

(Comparative Example 2)
As shown in Table 1, the blending ratio of powder containing 50% cement (PX powder manufactured by Mitsuboshi Belting) to resin emulsion (WD primer A manufactured by Mitsuboshi Belting) having a polymer solid content of 45% is 100: A test specimen was prepared in exactly the same manner as in Example 1 except that it was 75. Table 2 shows the results of the tensile test and applicability evaluation.

(Comparative Example 3)
As shown in Table 1, the blending ratio of powder containing 50% cement (PX powder manufactured by Mitsuboshi Belting) to resin emulsion (WD primer A manufactured by Mitsuboshi Belting) having a polymer solid content of 45% is 100: A test specimen was prepared in exactly the same manner as in Example 1 except that 100 was used. Table 2 shows the results of the tensile test and applicability evaluation.

(Comparative Example 4)
As shown in Table 1, the blending ratio of powder containing 50% cement (PX powder manufactured by Mitsuboshi Belting) to resin emulsion (WD primer A manufactured by Mitsuboshi Belting) having a polymer solid content of 45% is 100: A test specimen was prepared in exactly the same manner as in Example 1 except that it was 125. Table 2 shows the results of the tensile test and applicability evaluation.

(Comparative Example 5)
As shown in Table 1, the blending ratio of powder containing 50% cement (PX powder manufactured by Mitsuboshi Belting) to resin emulsion (WD primer A manufactured by Mitsuboshi Belting) having a polymer solid content of 45% is 100: A test specimen was prepared in exactly the same manner as in Example 1 except that 350. The results of the applicability evaluation are shown in Table 2. Further, a surface layer was applied to a concrete base with a thickness of 50 mm and cured at room temperature for 7 days to obtain a specimen having a width of 100 to 340 mm. A crack having a width of 5 mm was generated on the base, and the appearance of the surface layer was observed. The results are shown in Table 3.

(Comparative Example 6)
As shown in Table 1, the blending ratio of powder containing 50% cement (PX powder manufactured by Mitsuboshi Belting) to resin emulsion (WD primer A manufactured by Mitsuboshi Belting) having a polymer solid content of 45% is 100: A test specimen was prepared in exactly the same manner as in Example 1 except that 600 was used. The results of the applicability evaluation are shown in Table 2. Further, a surface layer was applied to a concrete base with a thickness of 50 mm and cured at room temperature for 7 days to obtain a specimen having a width of 100 to 340 mm. A crack having a width of 5 mm was generated on the base, and the appearance of the surface layer was observed. The results are shown in Table 3.

  From the results in Table 2, when the ratio of cement to polymer solid content is in the range of 100/60 to 100/30, the coating property is generally good, and the elongation performance is high and cracks occur in the base. It is easy to follow and move and can prevent cracks and floats.

  On the other hand, in Comparative Examples 1 to 4, although the elongation is large, the applicability is poor and it is not suitable for actual use. Moreover, although the comparative examples 5-6 were excellent in applicability | paintability from the result of Table 3, it was understood that there is almost no elongation and the crack has generate | occur | produced and cannot follow the motion of a foundation | substrate.

  It can be used for renovation of concrete canals.

It is a perspective sectional view of the concrete channel of the present invention. It is sectional drawing which shows the structure in a joint part. It is sectional drawing which shows an example of a waterproof sheet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Waterway member 2 Joint part 3 Adhesive layer 4 Waterproof sheet 5 Surface layer S Sealing material

Claims (8)

  In a water-blocking structure of a concrete waterway joint that stops leakage from the joints of the waterway members of a waterway formed by arranging a plurality of concrete waterway members in the longitudinal direction, at least cement and resin around the joints on the inner surface of the waterway member A concrete water channel joint impermeable structure characterized by laminating and arranging an adhesive layer made of an emulsion, a waterproof sheet, and at least a surface layer made of cement and a resin emulsion.   The concrete waterway joint impermeable structure according to claim 1, wherein the blending amount of cement and resin emulsion in the adhesive layer is in the range of 100/20 to 100/200 in terms of solid content ratio of cement / resin emulsion.   The concrete waterway joint impermeable structure according to claim 1 or 2, wherein the amount of the cement and the resin emulsion in the surface layer is 100/60 to 100/30 in terms of the solid content ratio of the cement / resin emulsion.   In the water-blocking structure of the concrete water channel joint part that stops water leakage from the joint part of the water channel members of the water channel formed by arranging a plurality of concrete water channel members in the longitudinal direction, from the epoxy resin around the joint part of the inner surface of the water channel member A concrete water channel joint water-impervious structure, comprising: an adhesive layer, a waterproof sheet, and a surface layer composed of at least cement and a resin emulsion.   In a water-blocking method for a concrete waterway joint that stops leakage from the joints between the waterway members of a waterway formed by arranging a plurality of concrete waterway members in the longitudinal direction, at least cement and resin in the periphery including the joints on the inner surface of the waterway member A concrete waterway joint impermeable method characterized in that an adhesive layer made of an emulsion is applied, a waterproof sheet is stuck thereon, and then a surface layer made of at least a cement and a resin emulsion is applied.   The concrete waterway joint impermeable method according to claim 5, wherein the blending amount of the cement and the resin emulsion in the adhesive layer is in the range of 100/20 to 100/200 in terms of the solid content ratio of the cement / resin emulsion.   7. The concrete waterway joint impermeable method according to claim 5, wherein the blending amount of the cement and the resin emulsion in the surface layer is in the range of 100/60 to 100/30 as a solid content ratio of the cement / resin emulsion.   In a water-blocking method for a concrete waterway joint that stops water leakage from the joints between the waterway members of a waterway formed by arranging a plurality of concrete waterway members in the longitudinal direction, from the epoxy resin around the joints on the inner surface of the waterway member A concrete waterway joint impermeable method characterized by applying an adhesive layer, attaching a waterproof sheet thereon, and then applying a surface layer comprising at least cement and a resin emulsion.

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