CN209941615U

CN209941615U - Dam water delivery culvert expansion joint stagnant water restoration structure

Info

Publication number: CN209941615U
Application number: CN201920565711.1U
Authority: CN
Inventors: 杨松堂; 邢精连; 李大亮; 周智慧; 周健
Original assignee: Nanjing Water Conservancy Planning And Design Institute Co Ltd
Current assignee: Nanjing Water Conservancy Planning And Design Institute Co Ltd
Priority date: 2019-04-24
Filing date: 2019-04-24
Publication date: 2020-01-14
Anticipated expiration: 2029-04-24

Abstract

The utility model discloses a structure is restoreed to water delivery culvert expansion joint stagnant water under dam, including filling layer, tie coat, barrier layer and fixed bed, the filling layer sets up in the culvert expansion joint and seals the expansion joint opening, the barrier layer covers the filling layer, constitutes and the both ends are connected by sheet material and forms the enclosed construction, the tie coat is located between barrier layer and the filling layer, comprises bonding type oleamen, the fixed bed sets up in the barrier layer outside, is fixed in the culvert wall with the barrier layer. The dam water delivery culvert expansion joint water stop repair structure is short in construction period, good in repair effect and capable of being widely used for repairing various expansion joints after water stop failure.

Description

Dam water delivery culvert expansion joint stagnant water restoration structure

Technical Field

The utility model relates to an expansion joint processing technology field, concretely relates to structure is restoreed to water delivery culvert expansion joint stagnant water under dam.

Background

In the hydraulic buildings such as dams and dykes, structures such as under-dam water delivery culverts are usually required to meet the requirements of irrigation and water delivery. In order to meet the requirements of uneven settlement of the foundation and adaptation to the change of the environmental temperature, expansion joints are required to be arranged, the culvert is divided into a plurality of sections, settlement joints are arranged in the middle of the culvert, and the sections are connected through water stop. The water-stopping material is usually a water-stopping copper sheet or a rubber water-stopping belt. During construction, water-stopping installation is completed firstly, and then the water-stopping copper sheet or the rubber water-stopping belt is poured into the concrete wall. Therefore, once the water stopping between the tunnel bodies is damaged, an anti-seepage system from an inlet of the culvert in front of the dam to an outlet behind the dam is damaged, the seepage diameter length is insufficient, and the pressurized water at the periphery of the tunnel bodies can carry soil bodies to penetrate through the expansion joints to enter the tunnel to form seepage damage, so that the dam is collapsed. And expansion joint stagnant water is in case lost efficacy leaks, then is difficult to restore, even restore, on the one hand, because culvert hole body size restriction, be difficult to utilize professional machinery to carry out the fine operation, on the other hand, culvert hole body wall thickness is thinner, can not be to pouring new concrete after destroying the wall on a large scale.

Therefore, before the failure water stopping is repaired, careful consideration needs to be given to the failure water stopping, firstly, the failure water stopping can meet the design requirements after the water stopping is repaired, meanwhile, the original structure is not damaged, and secondly, the failure water stopping can meet the deformation requirement between the adjacent hole bodies after the water stopping is repaired.

At present, the method which is common in China determines a restoration scheme according to different soil covering thicknesses of a tunnel body, if the soil covering thickness is small, soil bodies around the whole settlement joint are all dug out, then the head of a culvert is chiseled by about 50cm, the original water stop is removed, a new water stop is installed again, and finally concrete is poured; if the soil is thick, chiseling the original concrete on the inner wall of the hole body to remove the original water stop protective layer, and pouring the concrete after water stop is replaced. The first scheme can thoroughly solve the problem of water stopping failure, but has the advantages of small application range, more limiting conditions and unsuitability for common water stopping repair conditions. Although the second scheme can be applied to the general water stopping repair situation, the new and old combination problems are more and the durability is poor when concrete is poured. Simultaneously, two kinds of schemes all need to chisel the soil body around the stagnant water that fails and remove and pour the concrete again, and the construction cycle is long and the construction degree of difficulty is great.

Disclosure of Invention

The utility model provides a to above-mentioned defect, provide a structure is restoreed to dam water delivery culvert expansion joint stagnant water, its concrete technical scheme as follows:

the utility model provides a structure is restoreed to water delivery culvert expansion joint stagnant water under dam, includes filling layer, tie coat, barrier layer and fixed bed, the filling layer sets up in the culvert expansion joint and seals the expansion joint opening, barrier layer covers the filling layer, constitutes and the both ends are connected by sheet material and form the enclosed construction, the tie coat is located between barrier layer and the filling layer, comprises bonding class oleamen, the fixed bed sets up in the barrier layer outside, is fixed in the culvert wall with the barrier layer.

As an improvement of the scheme, the culvert wall surfaces on two sides of the expansion joint are provided with grooves, and the bonding layer, the impermeable layer and the fixed layer are arranged in the groove parts.

As an improvement of the scheme, the width of the grooves in the culvert wall surfaces on the two sides of the expansion joint is 15cm, and the depth is 3 cm.

As an improvement of the scheme, the filling layer is made of polyurethane sealant.

As an improvement of the scheme, the impermeable layer is a flexible rubber sheet.

As an improvement of the scheme, the bonding layer is polyvinyl chloride cement or asphalt factice, and the space between the impermeable layer and the wall surface of the culvert is uniformly filled with the bonding layer.

As an improvement of the scheme, the fixing layer is a strip-shaped steel plate arranged on the outer sides of two side edges of the impermeable layer and is fixedly connected to the wall surface of the culvert through expansion bolts, expansion bolt holes are correspondingly formed in the wall surface of the culvert, and holes for the expansion bolts to pass through are reserved in the impermeable layer corresponding to the expansion bolt holes.

As an improvement of the scheme, the thickness of the filling layer is not less than 2cm, the thickness of the bonding layer is not less than 10mm, and the thickness of the impermeable layer is 8-10 mm.

As an improvement of the scheme, the thickness of the steel plate used in the fixing layer is 8mm, and the distance between the expansion bolts is 10-15 cm.

As an improvement of the scheme, two end parts of the flexible rubber sheet used by the impermeable layer are obliquely cut, the oblique cut surfaces are coated with glue for contact bonding, and the thickness of the bonded part of the end part of the flexible rubber sheet is consistent with that of the rest position.

The utility model discloses a concrete construction method of structure is restoreed to dam water delivery culvert expansion joint stagnant water, for following step:

(1) chiseling inner surface concrete within 15cm of the two sides of the expansion joint, wherein the depth is about 3cm, all surface loose blocks are chiseled, and the surface is trimmed and ground;

(2) arranging expansion bolt holes on the chiseled hole wall, wherein the expansion bolt holes are uniformly arranged on two sides of the expansion joint, and the distance between every two side holes is 10-15 cm;

(3) cleaning the chiseled hole wall, and smearing adhesive ointment such as polyvinyl chloride cement with thickness of 10 mm. The surface of the factice is smooth, so that the water stop rubber sheet can be ensured to be fully contacted with the concrete, and the factice is smeared on the local ultra-deep position of the concrete surface in the step (1) to be leveled;

(4) sticking a rubber sheet on the ointment, wherein the rubber sheet spans the expansion joint, the width of each of two sides of the rubber sheet is about 15cm, and holes are arranged on the rubber sheet corresponding to the expansion bolt holes;

(5) grinding the lapping positions at two ends of the adhesive tape into a cone, coating rubber adhesive glue such as JL-330 rubber adhesive glue on the surface layer, adhering the two lapping strips together and compressing, wherein the thickness of the lapping position is basically consistent with that of the adhesive tape at the rest positions after compression;

(6) the two sides of the rubber sheet are tightly pressed by 8mm steel plates, and then the steel plates and the rubber sheet are fixed on the concrete wall through expansion screws.

Compared with the prior art, the utility model adopts the above technical scheme, the technical effect who has is:

1. the utility model discloses simple structure, adaptability is wide, is applicable to the general stagnant water and restores the condition, and the clear height of the body of a hole at the culvert exceeds 0.8m, and under the condition that the clear width exceeds 0.6m, can realize that maintenance personal advances the hole and restore, it is wide to be suitable for the engineering type, not only is applicable to small-size structures, is applicable to the restoration that large-scale structures expansion joint stagnant water damaged simultaneously.

2. The utility model discloses the construction degree of difficulty is lower, need not to carry out whole excavation to the concrete side in the stagnant water outside, only needs to contain the concrete of the wide 15cm of hole wall face, dark 3cm within range to the expansion joint both sides and chisels the clearance, has greatly shortened construction cycle, has realized quick restoration.

3. The utility model discloses a restoration structure need not to carry out concrete placement again in the repair process, has avoided new and old concrete to combine not good problem, uses expansion bolts to carry out physics simultaneously and fixes, does not have the step of waiting for the concrete setting, further shortens the engineering time.

4. The utility model discloses a repair structure adopts the restoration of full enclosure mode to the expansion joint, and the expansion joint after the restoration can not appear because the different positions stagnant water damages the condition that leads to other positions to appear local infiltration, can play the effect of a long time and ease.

5. The utility model discloses an it filling layer, tie coat and barrier layer of restoration structure all adopt the material that has certain elasticity, satisfy the daily function demand of expansion joint.

Drawings

Fig. 1 is a radial section view of the water stopping repair structure for the expansion joint of the under-dam water delivery culvert.

Fig. 2 is an axial section view of the water stopping repair structure for the expansion joint of the under-dam water delivery culvert.

Reference numerals: 1. a culvert concrete wall; 2. damaging the water stop sheet; 3. an expansion joint; 4. a filling layer; 5. a bonding layer; 6. an impermeable layer; 7. an expansion bolt; 8. a fixed layer; 9. the rubber sheet lap joint.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout.

Fig. 1 and 2 show a water-stopping restoration structure for an expansion joint 3 of a water transport culvert under a dam, for convenience of explanation, a culvert with a rectangular cross section is used for illustration, and in practical application, the restoration structure can also be used for other culverts with a circular cross section and the like.

As shown in fig. 1, the repair structure comprises a filling layer 4, an adhesive layer 5, an impermeable layer 6 and a fixing layer 8, grooves are further formed in the wall surfaces of the culvert concrete wall 1 on the two sides of the expansion joint 3, and the adhesive layer 5, the impermeable layer 6 and the fixing layer 8 are all arranged in the groove portions. The width of the groove on the wall surface of the culvert concrete wall 1 at two sides of the expansion joint 3 is 15cm, and the depth is 3 cm.

The filling layer 4 is polyurethane sealant, is arranged in the culvert expansion joint 3 and seals the opening of the expansion joint 3. The impermeable layer 6 is a flexible rubber sheet, covers the filling layer 4, and both sides of the flexible rubber sheet exceed the expansion joint 315 cm. A bonding layer 5 is arranged between the flexible rubber sheets and the wall surface of the culvert concrete wall 1, the bonding layer 5 is polyvinyl chloride cement, and the bonding layer 5 is uniformly filled in the space between the flexible rubber sheets and the wall surface of the culvert concrete wall 1. The bonding layer 5 can be used for trowelling the local ultra-deep part of the wall surface of the culvert concrete wall 1 after finishing, so that the rubber sheets used by the anti-seepage layer 6 can be fully and completely adhered to the wall surface of the culvert concrete wall 1, and meanwhile, the polyvinyl chloride cement used by the bonding layer 5 also has a strong waterproof effect after being solidified, so that the anti-seepage performance of the repair structure is further improved.

The fixing layer 8 is a strip-shaped steel plate arranged on the outer sides of two side edges of the impermeable layer 6 and is fixedly connected to the culvert concrete wall 1 through expansion bolts 7, expansion bolts 7 are correspondingly arranged on the wall surface of the culvert concrete wall 1, and holes for the expansion bolts 7 to pass through are reserved in the flexible rubber sheets corresponding to the expansion bolts 7. The polyurethane sealant used in the filling layer 4 is filled to 2cm in thickness in the expansion joint 3, the polyvinyl chloride daub used in the bonding layer 5 is smeared to 10mm in thickness, the flexible rubber sheet used in the impermeable layer 6 is 9mm in thickness, and the steel plate used in the fixed layer 8 is 8mm in thickness.

As shown in figure 2, two ends of the flexible rubber sheet used by the impermeable layer 6 are chamfered, the chamfered surface is coated with JL-330 rubber adhesive for contact bonding, and the thickness of the bonded rubber sheet lap joint 9 is consistent with the thickness of the rest positions. The steel plate used by the fixed layer 8 is bent by being attached to the wall surface at the corner of the culvert wall surface, or is cut into an angle of 45 degrees for lap joint. The distance between the expansion bolts 7 is 12 cm.

The above examples are provided for clarity of illustration only and are not intended to limit the invention to the particular embodiments described. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Any obvious variations or modifications which come within the spirit and scope of the invention are desired to be protected by the following claims.

Claims

1. The utility model provides a structure is restoreed to water delivery culvert expansion joint stagnant water under dam, its characterized in that, includes filling layer, tie coat, barrier layer and fixed bed, the filling layer sets up in the culvert expansion joint and seals the expansion joint opening, barrier layer covers the filling layer, constitutes and both ends are connected by sheet material and form the enclosed construction, the tie coat is located between barrier layer and the filling layer, comprises bonding class oleamen, the fixed bed sets up in the barrier layer outside, is fixed in the culvert wall with the barrier layer.

2. The water stopping and repairing structure for the expansion joint of the water delivery culvert under the dam as claimed in claim 1, wherein the culvert wall surfaces at two sides of the expansion joint are further provided with grooves, and the bonding layer, the impermeable layer and the fixing layer are all arranged in the groove parts.

3. The water stopping and repairing structure for the expansion joint of the water delivery culvert under the dam as claimed in claim 2, wherein the width of the groove on the culvert wall surface at both sides of the expansion joint is 15cm, and the depth is 3 cm.

4. The water stopping and repairing structure for the expansion joint of the water delivery culvert under the dam as claimed in claim 1, 2 or 3, wherein the filling layer is polyurethane sealant.

5. The water stopping repair structure for the expansion joint of the water delivery culvert under the dam as claimed in claim 4, wherein the impermeable layer is a flexible rubber sheet.

6. The water stopping and repairing structure for the expansion joint of the water delivery culvert under the dam as claimed in claim 5, wherein the bonding layer is polyvinyl chloride cement or asphalt factice, and the space between the impermeable layer and the wall surface of the culvert is uniformly filled with the bonding layer.

7. The water stopping and repairing structure for the expansion joint of the water delivery culvert under the dam as claimed in claim 6, wherein the fixing layer is a strip steel plate arranged outside the two side edges of the impermeable layer and fixedly connected to the wall surface of the culvert through expansion bolts, the wall surface of the culvert is correspondingly provided with expansion bolt holes, and holes for the expansion bolts to pass through are reserved on the impermeable layer corresponding to the expansion bolt holes.

8. The water stopping and repairing structure for the expansion joint of the water delivery culvert under the dam as claimed in claim 7, wherein the thickness of the filling layer is not less than 2cm, the thickness of the bonding layer is not less than 10mm, and the thickness of the impermeable layer is 8-10 mm.

9. The water stopping and repairing structure for the expansion joint of the water delivery culvert under the dam as claimed in claim 8, wherein the thickness of the steel plate used in the fixing layer is 8mm, and the distance between the expansion bolts is 10-15 cm.

10. The water stopping and repairing structure for the expansion joint of the water delivery culvert under the dam as claimed in claim 9, wherein two ends of the flexible rubber sheet used by the impermeable layer are obliquely cut, the oblique cut surfaces are coated with glue for contact bonding, and the thickness of the bonded part of the end of the flexible rubber sheet is consistent with the thickness of the rest position.