CN212835254U - Expansion joint double water-stop seepage-proofing structure for water delivery aqueduct project - Google Patents
Expansion joint double water-stop seepage-proofing structure for water delivery aqueduct project Download PDFInfo
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- CN212835254U CN212835254U CN202021614570.7U CN202021614570U CN212835254U CN 212835254 U CN212835254 U CN 212835254U CN 202021614570 U CN202021614570 U CN 202021614570U CN 212835254 U CN212835254 U CN 212835254U
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Abstract
The utility model provides a double water-stop and seepage-proofing structure for an expansion joint of a water delivery aqueduct project, wherein sealant, asphalt hemp and a U-shaped water stop are sequentially arranged from the outer wall of the aqueduct to the inner wall of the aqueduct in the expansion joint; the inner wall of the aqueduct is provided with a groove, the U-shaped water stop comprises a U-shaped groove part and flanges at two sides, the outer convex surface of the U-shaped groove part faces to the asphalt hemp thread and is embedded at the end part of the asphalt hemp thread, and the flanges are laid at the bottom of the groove of the inner wall of the aqueduct; epoxy mortar is filled in the groove on the inner wall of the aqueduct, a joint is arranged in the middle of the epoxy mortar, and a PE foam closed pore plate is arranged in an inward concave cavity of the joint and the U-shaped groove part; a butyl tape is adhered on the top and the periphery of the PE foam closed cell plate, and an inner anti-seepage coating is coated on the outer side and the periphery of the butyl tape; the outer side of the inner anti-seepage coating is stuck with the base fabric of the tire, and the outer side and the periphery of the base fabric of the tire are coated with the outer anti-seepage coating. The utility model discloses realize the stable stagnant water of stagnant water system under the big deformation condition of aqueduct seam to the fail safe nature of stagnant water system has been improved greatly.
Description
Technical Field
The utility model belongs to the technical field of the prevention of seepage, concretely relates to dual stagnant water seepage prevention structure of water delivery aqueduct engineering expansion joint.
Background
By the end of 2017, the irrigation area is 2.7 hundred million acres at 22780 in China, wherein the irrigation area is 2.7 hundred million acres at 458 in large irrigation areas. The aqueduct is a connection project for crossing valleys, rivers, depressions and roads, has an important strategic position in water delivery in an irrigation area due to the unique structural characteristics of high frames, thin walls and the like, and is a 'neck clamping' project for ensuring the water delivery safety. According to statistics, the existing aqueduct in China exceeds 2 thousands of seats, most of the aqueduct is built in the 50-70 years of the last century, the aqueduct is close to or even exceeds the service life at present, the aqueduct is in the middle and old age, the safety and the durability of the aqueduct are great, the major problems of groove body fracture and falling, bent instability, collapse and large amount of leakage of part of aqueduct occur, and great influence is brought to the normal operation of an irrigation area.
The water seepage of the expansion joint is a common problem of a water delivery building, and long-term water seepage can cause corrosion and frost heaving damage of a concrete reinforcement, accelerate the deterioration and damage of concrete and seriously affect the safe operation of the project. Most expansion joints of aqueduct projects in irrigation areas are filled with caulking materials, and rubber water stops are adhered to the surfaces of the joints, and some projects even adopt an anti-seepage treatment scheme of adhering rubber water stops. The traditional surface-adhered rubber water-stopping and seepage-proofing scheme has the following defects: (1) exposed rubber is used for stopping water, blocking water and flow; (2) sticking the rubber water stop surface layer, and exposing and irradiating to accelerate aging; (3) the surface layer is pasted with rubber, so that the water stopping reliability is low and the safety is poor. Some operation management units are maintained for several times, and even phenomena of 'annual failure and annual repair' appear. Especially, the expansion joint sealing material has the characteristics of climate environments such as high cold, high temperature difference, strong ultraviolet rays and the like in northwest areas of China, and provides higher requirements for selection of expansion joint sealing materials and design of water-stopping structures.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model provides a dual stagnant water seepage prevention structure of water delivery aqueduct engineering expansion joint satisfies the higher requirement of expansion joint prevention of seepage. Especially, the utility model discloses can adapt to longspan, high framed bent, long distance aqueduct, the aqueduct expansion joint warp great, handles as the dual stagnant water prevention of seepage structure form of big deformation, guarantees function and stagnant water effect after the aqueduct expansion joint prevention of seepage was handled.
The specific technical scheme is as follows:
the expansion joint double water-stop seepage-proofing structure for water-conveying aqueduct engineering is characterized in that sealant, asphalt hemp thread and U-shaped water-stop belts are sequentially arranged from the outer wall of the aqueduct to the inner wall of the aqueduct in the expansion joint; the inner wall of the aqueduct is provided with a groove, the U-shaped water stop belt comprises a U-shaped groove part and flanges at two sides, and the flanges at two sides are respectively fixed at two sides of the opening part of the U-shaped groove part; the outer convex surface of the U-shaped groove part faces the asphalt hemp threads and is embedded into the end part of the asphalt hemp threads, and the turned-over edge is laid on the bottom of the inner wall of the aqueduct; epoxy mortar is filled in the groove on the inner wall of the aqueduct, a cutting seam is arranged in the middle of the epoxy mortar, the position of the cutting seam corresponds to the concave cavity of the U-shaped groove part of the U-shaped water stop belt, and a PE foam closed pore plate is arranged in the concave cavity of the cutting seam and the U-shaped groove part; the top of the PE foam closed pore plate and the surface of the epoxy mortar are flush with the inner wall of the aqueduct, a butyl adhesive tape is adhered to the top of the PE foam closed pore plate and the periphery of the PE foam closed pore plate, and an inner anti-seepage coating is coated on the outer side of the butyl adhesive tape and the periphery of the butyl adhesive tape; the outer side of the inner anti-seepage coating is stuck with the base fabric of the tire, and the outer side and the periphery of the base fabric of the tire are coated with the outer anti-seepage coating.
The groove, the butyl adhesive tape, the inner anti-seepage coating and the tire base cloth on the inner wall of the aqueduct are symmetrically distributed on two sides of the expansion joint along the center line.
The areas of the butyl tape, the inner anti-seepage coating and the tire base cloth are all smaller than the area of the epoxy mortar, and the covered area of the outer anti-seepage coating is larger than the area of the epoxy mortar.
The outer impermeable coating and the inner impermeable coating are SK blade coating polyurea coatings.
On the basis of fully considering long-term action of load, inaccuracy of joint displacement prediction and other various linear and nonlinear actions and disturbances, a double water-stopping anti-seepage structure system is provided, stable water stopping of the water stopping system is achieved under the condition that the joint of the aqueduct is deformed greatly (the deformation of the expansion joint of the original east deep water supply aqueduct is improved to 10 cm), and therefore the safety and reliability of the water stopping system are greatly improved.
The utility model provides a dual stagnant water seepage prevention structure of water delivery aqueduct engineering expansion joint's characteristics are:
(1) the U-shaped water stop belt made of rubber and arranged at the bottom is designed according to the deformation of the joint, can adapt to the large displacement of the joint of the aqueduct, and avoids the water stop belt from generating larger stress to tear so as to influence the water stop effect;
(2) the U-shaped water stop is embedded in the epoxy mortar, so that the durability of the U-shaped water stop can be improved;
(3) the outer impermeable coating is formed by scraping and coating SK (methyl methacrylate) polyurea, the surface of the base fabric is coated with the SK polyurea in a scraping manner, the base fabric can be used as an impermeable layer to play a water stopping role while protecting a U-shaped water stop at the bottom, the elongation of the polyurea material can reach 300%, and the requirement of deformation of the engineering expansion joint can be met;
(4) the inner anti-seepage coating is also SK blade coating polyurea, a layer of butyl adhesive tape (5cm wide) is pasted between the inner anti-seepage coating and the surface of the epoxy mortar, and the butyl adhesive tape is used as a polyurea hollow interlayer, so that the ductility of the surface anti-seepage material can be exerted to the maximum.
(5) The SK blade coating polyurea has stronger impact resistance and wear resistance, the impact resistance and wear resistance of the SK blade coating polyurea are more than 10 times of those of C60 concrete, and the SK blade coating polyurea can protect the concrete from being eroded by water flow;
(6) the SK blade coating polyurea has good low-temperature flexibility, does not generate cracks when folded at minus 40 ℃, has improved tensile strength, tearing strength and shearing strength to a certain extent at low temperature, and has good frost resistance. The concrete can adapt to the low-temperature environment of a cold area, and can resist cracking caused by shrinkage deformation of the concrete in winter at low temperature without leakage;
(7) the SK blade coating polyurea has excellent ultraviolet aging resistance, no color change and no pulverization after exposure and use, and the service life is more than 20 years.
The water stopping scheme of the expansion joint of the aqueduct is designed to adopt an expansion joint double water stopping and seepage preventing structure form for treatment, as shown in attached figure 1. The comparative situation of the expansion joint double water-stop seepage-proofing structure form and the traditional water-stop form is shown in table 1.
TABLE 1 the utility model discloses a superior shortcoming of dual stagnant water seepage prevention structure and traditional stagnant water structure is more
The utility model discloses a technique is experimental on the aqueduct engineering in a plurality of large-scale irrigated area in China, for example 14 aqueducts in Shanxi Yu gate, 4 aqueducts in Ningxia seven star canal irrigated area, south water transfer engineering aqueduct etc. the expansion joint seepage problem has successfully been solved to the experimental result, has improved the reliability and the security of expansion joint prevention of seepage processing technique by a wide margin.
Drawings
Fig. 1 is a schematic sectional view of the present invention.
Detailed Description
The technical scheme of the utility model is explained by combining the attached drawings.
As shown in fig. 1, in the expansion joint double water-stop and seepage-proofing structure of the water delivery aqueduct project, a sealant 9, asphalt hemp 8 and a U-shaped water stop 1 are sequentially arranged from the outer wall of the aqueduct to the inner wall of the aqueduct in the expansion joint; the inner wall of the aqueduct is provided with a groove, the U-shaped water stop belt 1 comprises a U-shaped groove part and flanges at two sides, and the flanges at two sides are respectively fixed at two sides of the opening part of the U-shaped groove part; the outer convex surface of the U-shaped groove part faces the asphalt hemp threads 8 and is embedded into the end part of the asphalt hemp threads 8, and the flanging is laid on the bottom of the inner wall of the aqueduct; epoxy mortar 2 is filled in a groove on the inner wall of the aqueduct, a cutting seam is arranged in the middle of the epoxy mortar 2, the position of the cutting seam corresponds to the concave cavity of the U-shaped groove part of the U-shaped water stop 1, and a PE foam closed pore plate 3 is arranged in the concave cavity of the cutting seam and the U-shaped groove part; the top of the PE foam closed pore plate 3 and the surface of the epoxy mortar 2 are flush with the inner wall of the aqueduct, a butyl adhesive tape 4 is adhered to the top of the PE foam closed pore plate 3 and the periphery thereof, and an inner anti-seepage coating 6 is coated on the outer side of the butyl adhesive tape 4 and the periphery thereof; the outer side of the inner anti-seepage coating 6 is stuck with the base fabric 5, and the outer side and the periphery of the base fabric 5 are coated with the outer anti-seepage coating 7.
The groove on the inner wall of the aqueduct, the butyl adhesive tape 4, the inner anti-seepage coating 6 and the tire base cloth 5 are symmetrically distributed on the two sides of the expansion joint along the center line.
The areas of the butyl tape 4, the inner anti-seepage coating 6 and the base fabric 5 are all smaller than the area of the epoxy mortar 2, and the area covered by the outer anti-seepage coating 7 is larger than the area of the epoxy mortar 2.
The double water-stop seepage-proofing treatment method for the expansion joint comprises the following steps:
(1) firstly, removing mortar and an aged and damaged water stop in a reserved groove of an expansion joint;
(2) chiseling grooves in the inner wall of the aqueduct in the range of 10-15cm on two sides of the center line of the expansion joint, chiseling the grooves to a depth of 3-5cm, and removing impurities in the grooves and in the expansion joint;
(3) asphalt hemp threads 8 are embedded in the expansion joint, and the filling is compact and reliable;
(4) polishing and cleaning a groove base surface of the inner wall of the aqueduct, and then sticking a U-shaped water stop belt 1, wherein the U-shaped water stop belt 1 arranged at the bottom is designed according to the deformation of an expansion joint of the aqueduct;
(5) the surface of the U-shaped water stop 1 is backfilled and leveled by using epoxy mortar 2, a certain width is reserved in the middle of the epoxy mortar 2 for joint cutting treatment, and the joint cutting width is determined according to the deformation of the expansion joint of the aqueduct and is generally not less than 3 cm;
(6) a PE foam closed pore plate 3 is embedded in the joint cutting and U-shaped water stop 1 to adapt to the deformation of the expansion joint and serve as a support of the upper coating layer;
(7) a layer of butyl tape 4(5cm wide) is pasted between the surfaces of the epoxy mortar 2 to be used as an 'empty interlayer', and the pasting is required to be uniform without empty drum;
(8) polishing and cleaning the surfaces of the epoxy mortar 2 within the range of 20cm wide on the left side and the right side of the position with the expansion joint as a center line, brushing a special interface agent for concrete, and scraping SK and polyurea once when the interface agent is dry in touch, so as to be used as an inner impermeable coating 6; and adhering a tire base cloth 5 in the range of 15cm width at the upper part of the expansion joint, and after curing, continuously scraping until the thickness of the polyurea coating at the expansion joint is more than 4mm (the thickness of the middle part is thick, the thickness of two sides is thin), and the width of the coating is preferably more than 400mm, so as to be used as an outer impermeable coating 7. The allowed operation time of scraping and coating polyurea by brushing SK each time is within 6h, and the polyurea is brushed for multiple times until the thickness of the polyurea at the joint part reaches the design requirement. The coating thickness is uniform, no water or dust exists between layers, and the phenomenon of coating to influence the bonding quality between polyurea layers is prevented.
Claims (4)
1. The double water-stop and seepage-proofing structure of the expansion joint of the water delivery aqueduct project is characterized in that a sealant (9), asphalt hemp threads (8) and a U-shaped water stop (1) are sequentially arranged in the expansion joint from the outer wall of the aqueduct to the inner wall of the aqueduct; the inner wall of the aqueduct is provided with a groove, the U-shaped water stop (1) comprises a U-shaped groove part and flanges at two sides, and the flanges at two sides are respectively fixed at two sides of the opening part of the U-shaped groove part; the outer convex surface of the U-shaped groove part faces the asphalt hemp threads (8) and is embedded into the end part of the asphalt hemp threads (8), and the flanging is laid at the bottom of the inner wall of the aqueduct; epoxy mortar (2) is filled in a groove on the inner wall of the aqueduct, a cutting seam is arranged in the middle of the epoxy mortar (2), the position of the cutting seam corresponds to the concave cavity of the U-shaped groove part of the U-shaped water stop belt (1), and a PE foam closed pore plate (3) is arranged in the concave cavities of the cutting seam and the U-shaped groove part; the top of the PE foam closed pore plate (3) and the surface of the epoxy mortar (2) are flush with the inner wall of the aqueduct, a butyl adhesive tape (4) is adhered to the top of the PE foam closed pore plate (3) and the periphery of the top of the PE foam closed pore plate, and an inner impermeable coating (6) is coated on the outer side and the periphery of the butyl adhesive tape (4); the outer side of the inner anti-seepage coating (6) is stuck with the base fabric (5), and the outer side and the periphery of the base fabric (5) are coated with the outer anti-seepage coating (7).
2. The expansion joint double water-stop and seepage-proofing structure of the water delivery aqueduct project according to claim 1, wherein the groove of the inner wall of the aqueduct, the butyl tape (4), the inner seepage-proofing coating (6) and the tire base cloth (5) are symmetrically distributed on two sides of the expansion joint along the center line.
3. The expansion joint double water-stop and seepage-proofing structure of the water delivery aqueduct project according to claim 2, wherein the areas of the butyl tape (4), the inner seepage-proofing coating (6) and the base fabric (5) are all smaller than the area of the epoxy mortar (2), and the covered area of the outer seepage-proofing coating (7) is larger than the area of the epoxy mortar (2).
4. The expansion joint double water-stop and seepage-proofing structure of the water-conveying aqueduct project according to any one of claims 1 to 3, characterized in that the outer seepage-proofing coating (7) and the inner seepage-proofing coating (6) are SK knife-coated polyurea coatings.
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| CN202021614570.7U CN212835254U (en) | 2020-08-06 | 2020-08-06 | Expansion joint double water-stop seepage-proofing structure for water delivery aqueduct project |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114541332A (en) * | 2022-02-21 | 2022-05-27 | 福建江隆水利水电工程有限公司 | River course slope protection surface cast-in-place concrete expansion joint structure and construction method thereof |
| CN115126105A (en) * | 2022-06-06 | 2022-09-30 | 广城建设集团有限公司 | Elastic expansion joint water stop structure of building and construction method thereof |
| CN116024937A (en) * | 2023-02-14 | 2023-04-28 | 中国电建集团西北勘测设计研究院有限公司 | Vertical joint structure of concrete panel dam |
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2020
- 2020-08-06 CN CN202021614570.7U patent/CN212835254U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114541332A (en) * | 2022-02-21 | 2022-05-27 | 福建江隆水利水电工程有限公司 | River course slope protection surface cast-in-place concrete expansion joint structure and construction method thereof |
| CN114541332B (en) * | 2022-02-21 | 2024-03-19 | 福建江隆水利水电工程有限公司 | River channel slope protection surface cast-in-place concrete expansion joint structure and construction method thereof |
| CN115126105A (en) * | 2022-06-06 | 2022-09-30 | 广城建设集团有限公司 | Elastic expansion joint water stop structure of building and construction method thereof |
| CN115126105B (en) * | 2022-06-06 | 2023-08-22 | 广城建设集团有限公司 | Water stopping structure for elastic expansion joint of building and construction method thereof |
| CN116024937A (en) * | 2023-02-14 | 2023-04-28 | 中国电建集团西北勘测设计研究院有限公司 | Vertical joint structure of concrete panel dam |
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