CN217352331U

CN217352331U - Double-layer geomembrane and seam surface water stop connecting structure

Info

Publication number: CN217352331U
Application number: CN202221026788.XU
Authority: CN
Inventors: 任苇; 王波雷; 顾嵋杰; 刘锁; 孙海强
Original assignee: PowerChina Northwest Engineering Corp Ltd
Current assignee: PowerChina Northwest Engineering Corp Ltd
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2022-09-02
Anticipated expiration: 2032-04-28

Abstract

The invention discloses a double-layer geomembrane and seam face water stop connecting structure which comprises two layers of geomembranes. The bottom geomembrane is adhered to the periphery of the seam face by using a primer at the position close to the seam face, chloroprene rubber gaskets are added at the upper side and the lower side of the bottom geomembrane close to the outer side, and the bottom geomembrane is fastened and fixed on the concrete reserved flat steel by using middle expansion bolts through channel steel; paving a rubber water stop belt above the bottom geomembrane along the direction of the seam surface, refilling SR material, and forming an SR material bulge on the channel steel; adding an outer geomembrane and an SR anti-seepage cover sheet on the SR material, and tightening and fixing the two layers of geomembranes and the two layers of gaskets again through flat steel and expansion bolts at two sides; the anti-seepage primer is coated between the contact surfaces, so that the anti-seepage safety during underwater concrete parting is effectively realized, and the anti-seepage sealing effect is ensured.

Description

Double-layer geomembrane and seam surface water stop connecting structure

Technical Field

The invention belongs to the field of hydraulic and hydroelectric engineering construction, and relates to a double-layer geomembrane and seam surface water stop connecting structure.

Background

The geomembrane material has great advantages in the aspects of transportation, construction, cost, environmental protection and the like, and is widely applied to seepage prevention of projects such as channels, dikes, dams, refuse landfills, reservoirs and the like. SL/T225 + 1998 hydraulic and hydroelectric engineering geosynthetic material application technical specification and GB 50290 + 2014 geosynthetic material application technical specification specify the selection of the thickness, the material and the type of the geomembrane in the seepage-proof design, and particularly specify the connection mode of the geomembrane and different foundations and concrete buildings in the hydropower engineering geomembrane seepage-proof technical specification.

Generally, when the geomembrane is connected with a concrete building, the elevation of the top of a hydraulic concrete structure is above a water storage level, but when the top of the hydraulic concrete structure is below the water storage level, a structural parting joint needs to be connected with the geomembrane in a sealing way, and in order to solve the problem of waterproof safety of jointing water stop and the geomembrane under the condition, particularly to ensure safety, a technical method is necessary to improve the anti-seepage safety guarantee.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a double-layer geomembrane and seam surface water stop connecting structure, which can effectively solve the problem of seepage-proofing safety during underwater concrete parting and ensure the seepage-proofing sealing effect.

In order to achieve the above purpose, the technical scheme of the invention is as follows: a double-layer geomembrane and joint surface water stop connecting structure is characterized by comprising two layers of geomembranes positioned above a joint surface; the geomembrane comprises a bottom geomembrane and an outer side geomembrane, wherein the bottom geomembrane is close to and connected with the surface of the concrete, a filler is arranged between the outer side geomembrane and the bottom geomembrane, and the outer side geomembrane and the bottom geomembrane are fixed on the surface of the concrete.

Preferably, the bottom geomembrane is bonded to the concrete surface with a primer in the portions immediately adjacent to both sides of the seam face.

Preferably, the bottom geomembrane is folded into the seam when passing through the concrete seam surface, and the bottom geomembrane keeps extending and stretching.

Preferably, a polyethylene foam plate and SR materials are arranged inside the concrete joint surface.

Preferably, the bottom geomembrane is not adhered with the part of the bottom adhesive on two sides of the seam surface, a first neoprene gasket and a second neoprene gasket are additionally arranged inside and outside the bottom geomembrane, and channel steel is utilized to press the bottom geomembrane on the surface of concrete.

Preferably, the flat steel is embedded in the concrete structure at the position of the channel steel, the embedded flat steel is embedded in the concrete surface by adopting a grab bar, bolt holes are reserved in the surface of the embedded flat steel, the channel steel is fixedly connected to the embedded flat steel through middle expansion bolts, and the channel steel fixedly compresses the bottom geomembrane structure reinforced by two layers of chloroprene rubber.

Preferably, a layer of rubber water stop belt is laid on the bottom geomembrane along the direction of the joint surface of the concrete, and the tail end of the rubber water stop belt along the direction of the joint surface is buried in the concrete and the joint surface filler.

Preferably, the SR material is filled in the gap between the rubber waterstop and the channel steel, and the SR material bulges and fixes the outer side of the channel steel.

Preferably, the outer surface of the SR material bulge is covered with an outer geomembrane, and an SR anti-seepage cover sheet is added on the outer surface of the outer geomembrane.

Preferably, the exposed flat steel is utilized to fasten the SR anti-seepage cover plate, the outer geomembrane, the two layers of neoprene gaskets and the bottom geomembrane clamped between the two layers of neoprene gaskets at the positions of the channel steel and on two sides of the SR material bulge.

Preferably, the exposed flat steel is fixed on the concrete surface by adopting expansion bolts.

Preferably, anti-seepage primer is brushed between the contact surfaces of the embedded flat steel, the exposed flat steel, the rubber water stop band and the bottom geomembrane and the outer side geomembrane.

The beneficial gain effects of the invention are as follows: the geomembrane adopts a double-layer geomembrane, is fixed around a seam face through channel steel, flat steel and expansion bolts, is filled with SR materials in the seam, and coats anti-seepage primer between the geomembrane, the rubber waterstop and the flat steel contact face, thereby solving the waterproof safety of the connection of the parting waterstop and the geomembrane and ensuring the anti-seepage sealing effect.

Drawings

Fig. 1 is a diagram of a double-layer geomembrane and a seam sealing method.

Fig. 2 is a cross section view I-I of an implementation of the double-layer geomembrane and the seam face water stopping method.

Fig. 3 is a sectional view of the double-layer geomembrane and a seam face water stopping method implemented in fig. 2-2.

Wherein: 1. a bottom geomembrane; 2. an outer geomembrane; 3. a first neoprene gasket; 4. a second neoprene gasket; 5. channel steel; 6. a middle stainless steel expansion bolt; 7. a rubber waterstop; 8. stainless steel expansion bolts on two sides; 9. a polyethylene foam board; 10. an SR material; 11. an SR impermeable cover sheet; 12. embedding flat steel in advance; 13. flat steel is leaked outside; 14. grabbing ribs; 15. the geomembrane is folded.

Detailed Description

The present invention is described in detail below with reference to the accompanying drawings, as shown in fig. 1 to 3, the present invention provides a technical solution: a double-layer geomembrane and joint surface water stop connecting structure comprises two layers of geomembranes; the two geomembranes comprise a bottom geomembrane 1 and an outer geomembrane 2; the part of the bottom geomembrane 1 close to the two sides of the seam surface is bonded on the surface of the concrete by using a primer; the bottom geomembrane 1 is folded into the seam when passing through the seam surface, the expansion and the contraction of the bottom geomembrane are kept, and meanwhile, the polyethylene foam plate 9 and the SR material 10 are arranged inside the seam surface, so that the sealing property in the seam is ensured.

The bottom geomembrane 1 is arranged at the part, which is not adhered with the base glue, of the two sides of the seam surface, a first chloroprene rubber gasket 3 and a second chloroprene rubber gasket 4 are added at the inner side and the outer side of the bottom geomembrane 1, and channel steel 5 is used for pressing the bottom geomembrane on the surface of concrete; the position of channel-section steel 5, the pre-buried band steel 12 of concrete structure leaves the bolt hole on the surface of pre-buried band steel 12, and channel-section steel 5 is connected through middle part stainless steel expansion bolts 6 and is fixed on pre-buried band steel 12 for channel-section steel 5 tightens bottom geomembrane 1 fixed structure with two-layer neoprene gaskets and compresses tightly.

And a layer of rubber water stop 7 is laid on the bottom geomembrane 1 along the direction of the joint surface of the concrete, and the tail end of the rubber water stop 7 along the direction of the joint surface is buried in the SR material 10 of the concrete and the joint surface. SR material 10 is filled in a gap between the rubber water stop 7 and the bottom geomembrane 1 and the channel steel 5, and SR material bulges are formed on the outer side of the channel steel 5.

The outer side of the SR material bump is covered with the outer geomembrane 2, and the outer geomembrane 2 needs to be reserved with enough length to ensure welding, and is generally not less than 50 cm; an SR impermeable cover sheet 11 is added on the outer side of the outer geomembrane 2; on two sides of the SR material bump, an SR anti-seepage cover plate 11, an outer side geomembrane 2, two layers of neoprene gaskets and a bottom geomembrane 1 added between the neoprene gaskets are fastened by exposed flat steel 13; the exposed flat steel 13 is fixedly fastened on the surface of the concrete through stainless steel expansion bolts 8 on two sides.

And an anti-seepage primer is brushed among the pre-embedded flat steel 12, the exposed flat steel 13, the rubber water stop 7, the contact surface of the bottom geomembrane 1 and the outer side geomembrane 2, so that the anti-seepage effect is ensured again.

In conclusion, the double-layer geomembrane and joint face water stop connecting structure adopts the double-layer geomembrane, the channel steel 5 and the exposed flat steel 13 and the chloroprene rubber gasket are used for fastening and fixing the geomembrane, and the anti-seepage primer is brushed among all contact faces, so that the anti-seepage safety during underwater concrete joint parting can be effectively realized, and the anti-seepage sealing effect is ensured.

The above description is only an example of the present patent and is not intended to limit the scope of the present patent, and all modifications, equivalents, and alternatives falling within the spirit and scope of the present patent application are also encompassed by the present patent disclosure.

Claims

1. A double-layer geomembrane and joint surface water stop connecting structure is characterized by comprising two layers of geomembranes positioned above a joint surface; the geomembrane comprises a bottom geomembrane and an outer side geomembrane, wherein the bottom geomembrane is close to and connected with the surface of the concrete, a filler is arranged between the outer side geomembrane and the bottom geomembrane, and the outer side geomembrane and the bottom geomembrane are fixed on the surface of the concrete.

2. The double-layer geomembrane and joint face water stop connection structure according to claim 1, wherein the bottom geomembrane is bonded to the concrete surface with a primer at portions adjacent to both sides of the joint face.

3. The double-layer geomembrane and joint face water stop connection structure according to claim 1, wherein the bottom geomembrane is folded into the joint when passing through the concrete joint face, and is kept to extend and contract.

4. The double-layer geomembrane and joint face water stop connection structure according to claim 1, wherein a polyethylene foam plate and SR material are arranged inside the concrete joint face.

5. The double-layer geomembrane and joint face water stop connecting structure according to claim 2, wherein the bottom geomembrane is provided with a first neoprene gasket and a second neoprene gasket which are additionally arranged inside and outside the bottom geomembrane at the parts, which are not adhered with the primer, of the two sides of the joint face, and the bottom geomembrane is tightly pressed on the surface of concrete by utilizing channel steel.

6. The double-layer geomembrane and joint face water stop connection structure according to claim 5, wherein a steel flat is pre-embedded in a concrete structure at the position of the channel steel, the pre-embedded steel flat is pre-embedded in the concrete surface by adopting a grabbing rib, a bolt hole is reserved in the surface of the pre-embedded steel flat, the channel steel is fixedly connected to the pre-embedded steel flat through a middle expansion bolt, and the channel steel fixedly compresses the bottom geomembrane structure reinforced by two layers of chloroprene rubber.

7. The double-layer geomembrane and joint face water stop connection structure according to claim 6, wherein a layer of rubber water stop strip is laid on the bottom geomembrane along the direction of the joint face of the concrete, and the tail end of the rubber water stop strip along the direction of the joint face is buried in the concrete and joint face filler.

8. The double-layer geomembrane and seam face water stop connecting structure according to claim 7, wherein a gap between the rubber water stop and the channel steel is filled with SR material, and the outer side of the channel steel is fixed by adopting SR material bulges.

9. The double-layer geomembrane and joint face water stop connection structure according to claim 8, wherein the SR material bulge outer surface covers an outer geomembrane, and an SR impermeable cover sheet is added on the outer surface of the outer geomembrane.

10. The double-layer geomembrane and stitched-face water stop connection according to claim 9, wherein the channel steel position, both sides of SR material bulge, the SR impermeable cover sheet, the outer geomembrane, the two layers of neoprene gaskets and the bottom geomembrane sandwiched between the two layers of neoprene gaskets are tightened with exposed flat steel.

11. The double-layer geomembrane and joint face water stop connection structure according to claim 10, wherein the exposed flat steel is fixed on the concrete surface by using expansion bolts.

12. The double-layer geomembrane and joint face water stop connection structure according to any one of claims 1 to 11, wherein an impermeable primer is brushed between the embedded flat steel, the exposed flat steel, the rubber water stop, the contact face of the bottom geomembrane and the outer side geomembrane.