CN219175332U

CN219175332U - Composite geomembrane anchoring structure

Info

Publication number: CN219175332U
Application number: CN202223474566.7U
Authority: CN
Inventors: 张�杰; 廖雯; 张曦彦; 朱凌宇; 王帅
Original assignee: Sinohydro Bureau 12 Co Ltd
Current assignee: Sinohydro Bureau 12 Co Ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-06-13
Anticipated expiration: 2032-12-26

Abstract

The utility model provides a composite geomembrane anchoring structure, which relates to the technical field of hydraulic engineering and comprises a waterproof layer, a water-stop sealing gasket assembly and a plurality of fixing assemblies, wherein the fixing assemblies are arranged on the water-stop sealing gasket assembly, each fixing assembly comprises a pressing plate, a gasket, a nut and a bolt, the waterproof layer, the water-stop sealing gasket assembly, the pressing plate, the gasket and the nut are sequentially arranged in a lamination mode, each water-stop sealing gasket assembly at least comprises two layers of sealing gaskets, and an area for clamping and fixing the composite geomembrane is formed between the two layers of sealing gaskets. The composite geomembrane anchoring structure is simple, can effectively reduce stress concentration at the end part of the composite geomembrane, enhances adaptability, and solves the problem that the composite geomembrane is easy to tear due to direct contact with concrete. The used materials are common materials in building construction, and the construction is convenient, economical and reasonable. The structure ensures that the contact position of the composite geomembrane and the peripheral concrete is impermeable, safe and reliable.

Description

Composite geomembrane anchoring structure

Technical Field

The utility model relates to the technical field of hydraulic engineering, in particular to a composite geomembrane anchoring structure.

Background

In the composite geomembrane anti-seepage inclined wall construction process, in order to ensure that the contact surface of the composite geomembrane and the peripheral concrete is tightly attached, after the water storage of the subsequent cofferdam, the composite geomembrane and the peripheral structure meet the anti-seepage requirement, and the composite geomembrane anchoring construction is needed. The method of directly contacting the composite geomembrane with the peripheral concrete surface is adopted simply, stress concentration can occur at the fixed end head due to the settlement deformation of the cofferdam, tearing damage can occur under extreme conditions, and the requirement of the cofferdam on seepage prevention can not be guaranteed. The structure is successfully applied to the peripheral anchoring construction of the composite geomembrane, and the effect is obvious.

Disclosure of Invention

The utility model aims to provide a composite geomembrane anchoring structure, which solves the problem of easy tearing existing in the prior composite geomembrane fixing mode.

In order to solve the problems, the utility model provides a composite geomembrane anchoring structure, which comprises a waterproof layer, a water-stop sealing gasket assembly and a plurality of fixing assemblies, wherein the fixing assemblies are arranged on the water-stop sealing gasket assembly, each fixing assembly comprises a pressing plate, a gasket, a nut and a bolt, the waterproof layer, the water-stop sealing gasket assembly, the pressing plate, the gasket and the nut are sequentially arranged in a laminated mode, each water-stop sealing gasket assembly at least comprises two layers of sealing gaskets, an area for clamping and fixing the composite geomembrane is formed between the two layers of sealing gaskets, a plurality of layers of composite geomembrane are folded between the two layers of sealing gaskets, and the width of the pressing plate is not smaller than that of the sealing gaskets.

According to one embodiment of the utility model, the two sealing gaskets are provided with strip-shaped protrusions on the end surfaces of one side opposite to each other, the ends of the strip-shaped protrusions are arc-shaped, the strip-shaped protrusions are arranged along the length direction of the sealing gaskets, and the strip-shaped protrusions on the two sealing gaskets are staggered with each other.

According to one embodiment of the utility model, the contact surface between at least one sealing pad and the composite geomembrane is provided with a smooth layer.

According to an embodiment of the utility model, the bolt is a chemical bolt.

According to an embodiment of the present utility model, the pressing plate is a steel plate.

According to an embodiment of the present utility model, the waterproof layer is an asphalt layer.

According to one embodiment of the utility model, the sealing gasket is a water rubber.

According to an embodiment of the utility model, the spacer is a spring spacer.

According to an embodiment of the utility model, the width of the sealing gasket is not less than 0.1m.

According to one embodiment of the utility model, the thickness of the sealing gasket is not less than 5mm.

The composite geomembrane has the beneficial effects that the anchoring structure is simple, the stress concentration at the end part of the composite geomembrane can be effectively reduced, the adaptability is enhanced, and the problem of easy tearing of the composite geomembrane caused by direct contact with concrete is solved. The used materials are common materials in building construction, and the construction is convenient, economical and reasonable. The structure ensures that the contact position of the composite geomembrane and the peripheral concrete is impermeable, safe and reliable, and provides a firm foundation for the next foundation pit excavation.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a schematic view of the overall structure of a composite geomembrane anchoring structure;

FIG. 2 is a schematic view of a three-dimensional structure of a composite geomembrane anchoring structure;

fig. 3 is a schematic cross-sectional view of the upper and lower gaskets.

Detailed Description

The following description is presented to enable one skilled in the art to practice the utility model and is provided only to enable the utility model. The embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the utility model defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other arrangements without departing from the spirit and scope of the utility model.

[ example 1 ]

The utility model provides a compound geomembrane anchor structure, as in FIG. 1, including the waterproof layer, sealing up pad subassembly 100 and a plurality of fixed subassembly 200, as in FIG. 2, fixed subassembly 200 evenly arranges on sealing up pad subassembly 100, fixed subassembly 200 includes compresses tightly plate 5, gasket 6, M24 nut 7 and bolt 8, the waterproof layer, sealing up pad subassembly, compress tightly plate 5, gasket 6, nut 7 stacks gradually and sets up, gasket 6 is the spring spacer, use with the M24 nut is supporting, at least include two-layer sealing up in sealing up subassembly 100, be upper sealing up 4 and lower sealing up 2 respectively, form the region that is used for pressing from both sides tight fixed compound geomembrane between the two-layer sealing up, compound geomembrane owner membrane folded layer 3 installs in this region, compress tightly plate 5 width is not less than sealing up the width, thereby make compound geomembrane installation after not directly contact with the concrete surface, sealing up has increased the cushioning effect, and through setting up main membrane folded layer 3, the problem of tearing easily in the traditional fixed mode has been solved.

The main membrane folded layer 3 is formed by at least folding 3 layers of the composite geomembrane main membrane, so that the cofferdam is prevented from being settled, deformed and torn.

The waterproof layer is an asphalt layer, asphalt is coated on the concrete foundation surfaces such as concrete toe boards, the width is 0.1m, the length is the peripheral anchoring full length of the composite geomembrane, and the concrete foundation surfaces are cleaned and roughened before asphalt brushing, so that the effect of preventing water seepage is achieved.

The bolts 8 are M24 x 300 chemical bolts, after punching, the chemical rubber tube is put into the bolt holes, the bolts 8 penetrate through the gasket 6, the pressing plate 5, the upper sealing gasket 4, the lower sealing gasket 2 and the waterproof layer, then are screwed into the bolt holes to be fixed, and finally are screwed down through the nuts 7.

Preferably, the holes in the upper sealing gasket 4 and the lower sealing gasket 2 for the bolts 8 to pass through are in interference fit with the bolts 8.

The compacting plate 5 is a steel plate, the thickness is 6mm, the length is 0.1m, and the width is not less than the width of the sealing gasket.

The sealing gasket is a water rubber, the thickness is not less than 5mm, the width is not less than 0.1m, and the length is the peripheral anchoring full length of the composite geomembrane. The gasket may also be other sealing materials such as asbestos gaskets, flexible graphite gaskets and the like,

specifically, under the condition of large sedimentation deformation caused by soft condition of pattern soil such as filling cofferdam on a deep and weak barrier lake phase sedimentation cover layer, asphalt brushing (width of 0.1 m) is adopted to form a waterproof layer to treat the surface of peripheral concrete within a certain range, two layers of water stop rubber (thickness of 5mm and width of 0.1 m) are used to protect the upper part and the lower part of the composite geomembrane, the middle composite geomembrane main membrane folding layer 3 increases the strength, and finally steel plates (thickness of 5mm and width of 0.1 m), spring gaskets and nuts are adopted to firmly press the composite geomembrane anchoring structure on the concrete surface at intervals of 50 cm. The composite geomembrane anchoring structure is simple, can effectively reduce stress concentration at the end part of the composite geomembrane, and enhances adaptability. The used materials are common materials in building construction, and the construction is convenient, economical and reasonable. The structure ensures that the contact position of the composite geomembrane and the peripheral concrete is impermeable, safe and reliable, provides a firm foundation for the next foundation pit excavation, and can provide successful and reliable experience for the same type of engineering.

Embodiment two: on the basis of the first embodiment, as shown in fig. 3, the end faces of two opposite sides of the sealing gaskets are provided with strip-shaped protrusions 9, the ends of the strip-shaped protrusions are arc-shaped, the strip-shaped protrusions 9 are arranged along the length direction of the sealing gaskets, the strip-shaped protrusions 9 on the two sealing gaskets are staggered mutually, the clamping effect can be improved after the sealing gaskets are clamped according with the geomembrane, and when the sealing gaskets are pulled, a certain expansion and contraction amount is reserved under the action of the protrusions due to the fact that the sealing gaskets are matched with the geomembrane, stress can be effectively prevented, and the tearing preventing effect is further improved.

Preferably, a smooth layer is arranged on the contact surface of the at least one sealing pad and the composite geomembrane, the smooth layer is arranged on the end surface of the sealing pad, which is in contact with the outer layer of the folded composite geomembrane, namely one layer connected with the extending part geomembrane, and the smooth layer is realized by arranging a plastic membrane such as a PE (polyethylene) optical membrane, so that the friction resistance between the water stop rubber and the composite geomembrane is reduced, and the composite geomembrane can stretch smoothly when being pulled due to sedimentation.

It will be appreciated by persons skilled in the art that the embodiments of the utility model described above and shown in the drawings are by way of example only and are not limiting. The objects of the present utility model have been fully and effectively achieved. The functional and structural principles of the present utility model have been shown and described in the examples and embodiments of the utility model are susceptible to any variations and modifications without departing from the principles.

Claims

1. The utility model provides a compound geomembrane anchor structure which characterized in that: including waterproof layer, sealing up pad subassembly and a plurality of fixed subassembly, fixed subassembly arranges sealing up pad subassembly is last, fixed subassembly is including compressing tightly plate (5), gasket (6), nut (7) and bolt (8), waterproof layer, sealing up pad subassembly, compressing tightly plate (5), gasket (6), nut (7) stack gradually and set up, sealing up at least including two-layer sealing up pad in the pad subassembly, form the region that is used for pressing from both sides tight fixed compound geomembrane between the two-layer sealing up pad, compound geomembrane is folding a plurality of layers to be set up in two-layer between the sealing up pad, compressing tightly plate (5) width is not less than sealing up the width.

2. The composite geomembrane anchoring structure of claim 1, wherein: the two sealing gaskets are provided with strip-shaped protrusions (9) on the end faces of one side opposite to each other, the end parts of the strip-shaped protrusions are arc-shaped, the strip-shaped protrusions (9) are arranged along the length direction of the sealing gaskets, and the strip-shaped protrusions (9) on the two sealing gaskets are staggered with each other.

3. The composite geomembrane anchoring structure of claim 2, wherein: and a smooth layer is arranged on the contact surface of at least one sealing pad and the composite geomembrane.

4. A composite geomembrane anchoring structure according to any one of claims 1 to 3, wherein: the bolt (8) is a chemical bolt.

5. The composite geomembrane anchoring structure of claim 4, wherein: the compaction plate (5) is a steel plate.

6. The composite geomembrane anchoring structure of claim 5, wherein: the waterproof layer is an asphalt layer.

7. The composite geomembrane anchoring structure of claim 6, wherein: the sealing gasket is a water rubber.

8. The composite geomembrane anchoring structure of claim 7, wherein: the gasket (6) is a spring gasket.

9. A composite geomembrane anchoring structure according to any one of claims 1 to 3, 5 to 8, wherein: the width of the sealing gasket is not less than 0.1m.

10. The composite geomembrane anchoring structure of claim 9, wherein: the thickness of the sealing gasket is not less than 5mm.