Anti-seepage connecting structure for geomembrane and asphalt concrete panel on high filling body

Abstract

The invention provides an anti-seepage connecting structure for a geomembrane and an asphalt concrete panel on a high filling body, which comprises a concrete connecting plate arranged on the filling body, a first geomembrane is arranged on the concrete connecting plate, one side of the first geomembrane is fixed with the concrete connecting plate through an anchoring structure, and the other side of the first geomembrane is fixed with the asphalt concrete panel. An asphalt concrete panel structure is further arranged on the lateral upper portion of the concrete connecting plate, a second geomembrane is arranged on the asphalt concrete panel structure, one side of the second geomembrane is away from the concrete connecting plate, and the other side of the second geomembrane extends to the upper portion of the first geomembrane and covers the anchoring structure; the second geomembrane and the first geomembrane are connected in a welding mode, a single-side welding area is formed at the welding position of the second geomembrane and the first geomembrane, the second geomembrane is bonded with the asphalt concrete panel structure and covers the first geomembrane, and therefore a concrete connecting plate on a high filling body and the first geomembrane can better adapt to deformation generated after water storage; and the leakage risk caused by separation of the anti-seepage joint after deformation of the concrete connecting plate is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy and hydropower, and in particular to an anti-seepage connection structure between a geomembrane and an asphalt concrete panel on a high filling body. Background Art

[0002] With the continuous development of water conservancy and hydropower projects, especially the upper reservoirs of pumped storage power stations, the topographic and geological conditions are becoming more and more complex. In order to modify the terrain and form a regular reservoir basin, a half-cut and half-fill layout is often adopted, resulting in a large amount of filling at the reservoir bottom and dam, and the reservoir bottom is often filled with poor materials. To adapt to the uneven deformation of the reservoir basin, most projects choose asphalt concrete panels with a certain deformation capacity for full reservoir basin waterproofing. However, for projects where the reservoir basin is located on a high fill body and the filling materials are still poor, it is easy to have a large settlement, which makes it difficult for the asphalt concrete panels to adapt. Therefore, geomembranes are often used for waterproofing at the reservoir bottom.

[0003] The geomembrane needs to be mechanically anchored to the surrounding concrete with bolts, but the asphalt concrete panel has low strength and cannot withstand the large mechanical anchoring force to directly anchor the geomembrane and other anti-seepage bodies on the asphalt concrete panel. When reservoirs and dams use two or more types of anti-seepage, the conventional connection scheme is to set a concrete connecting plate between the geomembrane and the asphalt concrete panel for transition. For projects where the reservoir basin is located on a high fill, the concrete connecting plate is located on the high fill. After the reservoir basin is filled with water, it will deform to a certain extent. There is a risk of cracks in the concrete connecting plate and the contact part of the asphalt concrete panel will be detached, affecting the anti-seepage safety of the project. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide an anti-seepage connection structure between a geomembrane and an asphalt concrete panel on a high fill body, which can solve the problem that cracks may occur in the concrete connecting plate set on the high fill body and the problem that the contact part with the asphalt concrete panel may be separated.

[0005] To this end, the present invention adopts the following technical solutions: A geomembrane and asphalt concrete panel anti-seepage connection structure on a high fill body, comprising a concrete connection plate arranged on the fill body, a first geomembrane arranged on the concrete connection plate, one side of the first geomembrane is fixed to the concrete connection plate by an anchoring structure, an asphalt concrete panel structure is also arranged on the upper side of the concrete connection plate, a second geomembrane is arranged on the asphalt concrete panel structure, one side of the second geomembrane is away from the concrete connection plate, the other side of the second geomembrane extends to the top of the first geomembrane and covers the anchoring structure, the second geomembrane is welded to the first geomembrane and a single-sided welding area is formed at the welding point of the two.

[0006] On the basis of adopting the above technical solutions, the present invention may also adopt the following further technical solutions, or use these further technical solutions in combination: The edge of the second geomembrane is sealed with a closed waterproof membrane.

[0007] The concrete connecting plate is in a two-layer stepped shape. The layer connecting the asphalt concrete panel structure and the first geomembrane is the first connecting layer. The layer connecting the asphalt concrete panel structure and the asphalt concrete panel structure is the second connecting layer. The first connecting layer is higher than the second connecting layer.

[0008] The asphalt concrete panel structure comprises a leveling adhesive layer, an asphalt wedge, an asphalt concrete thickening layer, a polyester grid, and an asphalt concrete anti-seepage layer which are arranged in sequence from bottom to top.

[0009] The leveling adhesive layer and the asphalt wedge are in contact with the side surfaces of the concrete connecting plate, and the asphalt concrete thickening layer, the polyester mesh, and the asphalt concrete anti-seepage layer extend to the top of the second connecting layer and are in contact with the side surfaces of the first connecting layer.

[0010] A slip layer is provided between the asphalt concrete thickening layer and the second connecting layer.

[0011] An asphalt waterproofing membrane is arranged between the lower part of the second geomembrane and the upper part of the asphalt concrete panel structure, and the lower surface of the second geomembrane is fixed to the asphalt waterproofing membrane by a butyl tape.

[0012] A reserved bulge is provided on one side of the first geomembrane close to the concrete connecting plate, a three-dimensional composite drainage net is provided above the reserved bulge, the three-dimensional composite drainage net is located under the first geomembrane, and the reserved bulge is filled with fine-grained filling material.

[0013] The second geomembrane covers the surrounding side of the anchoring structure and is provided with a plastic water-stopping bulge, a chloroprene rubber sheet is provided above the plastic water-stopping bulge, the chloroprene rubber sheet is located under the second geomembrane, and a plastic water-stopping material is provided inside the plastic water-stopping bulge.

[0014] The upper surface of the asphalt concrete panel structure not covered by the second geomembrane is coated with asphalt mastic.

[0015] Compared with the prior art, the present invention uses a concrete connecting plate as a connecting structure between the first geomembrane and the asphalt concrete panel structure, the first geomembrane is anchored on the concrete connecting plate with an anchoring structure, and the second geomembrane is bonded to the asphalt concrete panel structure and covers the first geomembrane. This allows the concrete connecting plate and the first geomembrane on the high fill body to better adapt to the deformation caused by water storage, avoiding the risk of leakage caused by the detachment of the anti-seepage joint after the deformation of the concrete connecting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the planar layout structure of the present invention.

[0017] Figure 2 For the present invention Figure 1 A partial enlarged schematic diagram of the structure. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred implementation scheme of the present invention is described below in conjunction with specific embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent elements with the same or similar functions. However, it should be understood that the drawings are only used for illustrative purposes and cannot be understood as limitations on the present invention. In order to better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted, and the positional relationship described in the drawings is only used for illustrative purposes and cannot be understood as limitations on the present invention.

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0020] The present invention provides an anti-seepage connection structure of a geomembrane and an asphalt concrete panel on a high fill body, comprising a concrete connecting plate 4 arranged on the fill body 5, a first geomembrane 1 being arranged on the concrete connecting plate 4, one side of the first geomembrane 1 being fixed to the concrete connecting plate 4 by an anchoring structure 6, an asphalt concrete panel structure 3 being also arranged above the side of the concrete connecting plate 4, a second geomembrane 2 being arranged on the asphalt concrete panel structure 3, one side of the second geomembrane 2 being away from the concrete connecting plate 4, the other side of the second geomembrane 2 extending to above the first geomembrane 1 and covering the anchoring structure 6, the second geomembrane 2 being welded to the first geomembrane 1 and a single-sided welding area 7 being formed at the place where the two are welded.

[0021] The anchoring structure 6 includes angle steel 22 and bolts 23, both of which are made of stainless steel. The first geomembrane 1 is anchored on the concrete connecting plate 4 through the angle steel 22 and the bolts 23, and the anchoring spacing is 30-45 cm.

[0022] The edge of the second geomembrane 2 is sealed with a closed waterproof membrane 19 .

[0023] The concrete connecting plate 4 is in a two-layer stepped shape. The layer connecting the asphalt concrete panel structure 3 and the first geomembrane 1 is the first connecting layer 41 , and the layer connecting the asphalt concrete panel structure 3 and the asphalt concrete panel structure 3 is the second connecting layer 42 . The first connecting layer 41 is higher than the second connecting layer 42 .

[0024] The asphalt concrete panel structure 3 includes a leveling adhesive layer 17 , an asphalt wedge 16 , an asphalt concrete thickening layer 14 , a polyester mesh 13 , and an asphalt concrete anti-seepage layer 12 which are arranged in sequence from bottom to top.

[0025] The asphalt wedge 16 is used to coordinate the local uneven deformation.

[0026] The leveling adhesive layer 17 and the asphalt wedge 16 abut against the side of the concrete connecting plate 4 , and the asphalt concrete thickening layer 14 , the polyester mesh 13 , and the asphalt concrete anti-seepage layer 12 extend to the top of the second connecting layer 42 and abut against the side of the first connecting layer 41 .

[0027] A slip layer 15 is provided between the asphalt concrete thickening layer 14 and the second connecting layer 42, which can adapt to certain deformations, especially horizontal deformations.

[0028] An asphalt waterproofing membrane 11 is arranged between the lower part of the second geomembrane 2 and the upper part of the asphalt concrete panel structure 3 , and the lower surface of the second geomembrane 2 is fixed to the asphalt waterproofing membrane 11 by a butyl tape 10 .

[0029] The second geomembrane 2 is bonded with butyl tape 10 and asphalt waterproofing membrane 11, and the bonding range needs to exceed the contact boundary between the asphalt concrete panel structure 3 and the concrete connecting plate 4 by a certain distance, so that even if uneven deformation and damage occur in this part, anti-seepage safety can be ensured.

[0030] Butyl tape 10 is a copolymer of isobutylene and isoprene, which has good chemical stability and thermal stability, the most prominent of which is air tightness and water tightness, and has good bonding properties to geomembranes and asphalt-based materials.

[0031] Butyl raw tape and asphalt waterproofing membrane have good bonding properties. Indoor 1:1 simulation tests show that under the action of 0.4MPa pressure (40m head), no leakage, water seepage or other abnormal conditions were found in the bonding structure, which fully demonstrates that the bonding structure can adapt to the operating conditions of reservoirs and dams with low head.

[0032] A reserved bulge 21 is provided on one side of the first geomembrane 1 close to the concrete connecting plate 4, and a three-dimensional composite drainage net 20 is provided above the reserved bulge 21. The three-dimensional composite drainage net 20 is located under the first geomembrane 1, which can ensure that the first geomembrane 1 is not punctured and damaged under water pressure conditions. The reserved bulge 21 is filled with fine-grained filling material to offset the uneven deformation between different structures and ensure that the first geomembrane 1 is not torn.

[0033] The second geomembrane 2 covers the surrounding side of the anchoring structure 6 and is provided with a plastic water-stop bulge 8. A chloroprene rubber sheet 9 is provided above the plastic water-stop bulge 8. The chloroprene rubber sheet 9 is located under the second geomembrane 2 to ensure that the second geomembrane 2 is not punctured by the anchoring structure 6. The plastic water-stop bulge 8 is provided with a plastic water-stop material. If the overlapping parts of the asphalt concrete panel structure 3 and the concrete connecting plate 4 are deformed and separated, under the action of water pressure, the plastic water-stop material can fill the gaps and defects that may be caused by the deformation of the asphalt concrete panel structure 3 and the concrete connecting plate 4 to avoid water leakage.

[0034] The upper surface of the asphalt concrete panel structure 3 that is not covered by the second geomembrane 12 is coated with asphalt mastic 18 .

[0035] According to the description and drawings of the present invention, those skilled in the art can easily manufacture or use the anti-seepage connection structure of the geomembrane and asphalt concrete panel on a high fill body of the present invention, and can produce the positive effects described in the present invention.

[0036] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internally connected between two mechanisms, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0037] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "inside", "horizontal", "end", "length", "outer end", "left", "right" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the mechanism or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. The terms "first" and "second" are also used only for simplicity of description, and do not indicate or imply relative importance.

[0038] Furthermore, in practicing the claims of the present invention, those skilled in the art can understand and effect variations to the disclosed embodiments by studying the drawings, the disclosure and the appended claims. In addition, in the claims and the specification, the words "comprise", "contain" and the like do not exclude other elements or steps, and non-plural nouns do not exclude their plural forms.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the present invention are covered by the scope of the claims of the present invention and will not be listed one by one here.

Claims

1. An anti-seepage connection structure between a geomembrane and an asphalt concrete panel on a high fill body, characterized in that: The invention comprises a concrete connecting plate (4) arranged on a fill body (5), a first geomembrane (1) being arranged on the concrete connecting plate (4), one side of the first geomembrane (1) being fixed to the concrete connecting plate (4) by an anchoring structure (6), an asphalt concrete panel structure (3) being arranged on the upper side of the concrete connecting plate (4), a second geomembrane (2) being arranged on the asphalt concrete panel structure (3), one side of the second geomembrane (2) being away from the concrete connecting plate (4), the other side of the second geomembrane (2) extending to the upper side of the first geomembrane (1) and covering the anchoring structure (6), the second geomembrane (2) being welded to the first geomembrane (1) and a single-sided welding area (7) being formed at the welding point between the two.

2. The anti-seepage connection structure of geomembrane and asphalt concrete panel on high fill body as claimed in claim 1, characterized in that: The edge of the second geomembrane (2) is sealed with a closed waterproof roll (19).

3. The anti-seepage connection structure of geomembrane and asphalt concrete panel on high fill body as claimed in claim 1, characterized in that: The concrete connecting plate (4) is in a two-layer stepped shape, the layer connecting the asphalt concrete panel structure (3) and the first geomembrane (1) is a first connecting layer (41), the layer connecting the asphalt concrete panel structure (3) and the asphalt concrete panel structure (3) is a second connecting layer (42), and the first connecting layer (41) is higher than the second connecting layer (42).

4. The anti-seepage connection structure of geomembrane and asphalt concrete panel on high fill body as claimed in claim 3, characterized in that: The asphalt concrete panel structure (3) comprises a leveling adhesive layer (17), an asphalt wedge (16), an asphalt concrete thickening layer (14), a polyester mesh (13), and an asphalt concrete anti-seepage layer (12) which are arranged in sequence from bottom to top.

5. The anti-seepage connection structure of geomembrane and asphalt concrete panel on high fill body as claimed in claim 4, characterized in that: The leveling rubber layer (17) and the asphalt wedge (16) are in contact with the side surface of the concrete connecting plate (4), and the asphalt concrete thickening layer (14), the polyester mesh (13), and the asphalt concrete anti-seepage layer (12) extend to the top of the second connecting layer (42) and are in contact with the side surface of the first connecting layer (41).

6. The anti-seepage connection structure of geomembrane and asphalt concrete panel on high fill body as claimed in claim 5, characterized in that: A slip layer (15) is provided between the asphalt concrete thickening layer (14) and the second connecting layer (42).

7. The anti-seepage connection structure of geomembrane and asphalt concrete panel on high fill body as claimed in claim 1, characterized in that: An asphalt waterproofing coiled material (11) is arranged between the bottom of the second geomembrane (2) and the top of the asphalt concrete panel structure (3), and the bottom surface of the second geomembrane (2) is fixed to the asphalt waterproofing coiled material (11) by means of a butyl tape (10).

8. The anti-seepage connection structure of geomembrane and asphalt concrete panel on high fill body as claimed in claim 1, characterized in that: A reserved bulge (21) is provided on one side of the first geomembrane (1) close to the concrete connecting plate (4), a three-dimensional composite drainage net (20) is provided above the reserved bulge (21), the three-dimensional composite drainage net (20) is located below the first geomembrane (1), and the reserved bulge (21) is filled with fine-grained filling material.

9. The anti-seepage connection structure of geomembrane and asphalt concrete panel on high fill body as claimed in claim 1, characterized in that: The second geomembrane (2) is provided with a plastic water-stopping bulge (8) on the circumferential side covering the anchoring structure (6), a chloroprene rubber sheet (9) is provided above the plastic water-stopping bulge (8), the chloroprene rubber sheet (9) is located below the second geomembrane (2), and a plastic water-stopping material is provided inside the plastic water-stopping bulge (8).

10. The anti-seepage connection structure of geomembrane and asphalt concrete panel on high fill body as claimed in claim 1, characterized in that: The upper surface of the asphalt concrete panel structure (3) not covered by the second geomembrane (12) is coated with asphalt mastic (18).

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