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

Abstract

The application provides a high filling body geomembrane and asphalt concrete panel anti-seepage connecting structure, which comprises a concrete connecting plate arranged on the filling body, a first geomembrane arranged on the concrete connecting plate, the first geomembrane being fixed with the concrete connecting plate through an anchoring structure, an asphalt concrete panel structure arranged above the side of the concrete connecting plate, a second geomembrane arranged on the asphalt concrete panel structure, the second geomembrane being away from the concrete connecting plate on one side, the second geomembrane extending to above the first geomembrane on the other side and covering the anchoring structure, the second geomembrane being welded with the first geomembrane and the welding position of the second geomembrane and the first geomembrane forming a single-side welding area, and the second geomembrane being bonded with the asphalt concrete panel structure and covering the first geomembrane, so that the concrete connecting plate and the first geomembrane on the high filling body can better adapt to the deformation caused by water storage, and the leakage risk caused by the disconnection of the anti-seepage joint after the deformation of the concrete connecting plate is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water conservancy and hydropower, and particularly relates to a geomembrane and asphalt concrete panel anti-seepage connecting structure on high filling body. BACKGROUND

[0002] With the continuous development of water conservancy and hydropower projects, especially pumped storage power stations, the topography and geological conditions are becoming more and more complex. In order to trim the terrain to form a regular reservoir basin, a semi-excavation and semi-filling arrangement is often used, which leads to a large amount of filling of the reservoir bottom and dam, and the reservoir bottom is often filled with poor materials. In order to adapt to the uneven deformation of the reservoir basin, most projects choose asphalt concrete panels with certain deformation capacity for full-reservoir-basin anti-seepage, but for projects in which the reservoir basin is located on a high filling body and the filling material is poor, large settlement is prone to occur, which makes it difficult for the asphalt concrete panel to adapt, and therefore the reservoir bottom often uses a geomembrane for anti-seepage.

[0003] The geomembrane needs to be mechanically anchored to the surrounding concrete by bolts, and the asphalt concrete panel has low strength and is difficult to withstand a large mechanical anchoring force to directly anchor the geomembrane and other anti-seepage bodies on the asphalt concrete panel. When a reservoir and a dam use two or more anti-seepage types, the conventional connecting scheme is to set a concrete connecting plate between the geomembrane and the asphalt concrete panel to transition and connect. However, for projects in which the reservoir basin is located on a high filling body, the concrete connecting plate is located on the high filling body, and after the reservoir basin is operated with water, a certain deformation will occur, and the concrete connecting plate has a risk of cracking and the asphalt concrete panel contact part being separated, which affects the anti-seepage safety of the project. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art and provide a geomembrane and asphalt concrete panel anti-seepage connecting structure on a high filling body, which can solve the problems of possible cracking of the concrete connecting plate arranged on the high filling body and possible separation of the contact part with the asphalt concrete panel.

[0005] To this end, the present application adopts the following technical solutions:

[0006] A geomembrane and asphalt concrete panel anti-seepage connecting structure on a high filling body, comprising a concrete connecting plate arranged on the filling body, a first geomembrane arranged on the concrete connecting plate, one side of the first geomembrane being fixed to the concrete connecting plate through an anchoring structure, an asphalt concrete panel structure arranged above one side of the concrete connecting plate, a second geomembrane arranged on the asphalt concrete panel structure, one side of the second geomembrane being away from the concrete connecting plate, the other side of the second geomembrane extending above the first geomembrane and covering the anchoring structure, the second geomembrane and the first geomembrane being welded and connected, and a single-sided welding area being formed at the welded part of the second geomembrane and the first geomembrane.

[0007] On the basis of the above technical scheme, the application can further adopt the following technical scheme, or use the further technical schemes in combination.

[0008] The edge of the second geomembrane is sealed by a closed waterproof roll.

[0009] The concrete connecting plate is two-layer stepped, one layer of the asphalt concrete panel structure connected with the first geomembrane is a first connecting layer, and one layer of the asphalt concrete panel structure connected with the asphalt concrete panel structure is a second connecting layer, and the first connecting layer is higher than the second connecting layer.

[0010] The asphalt concrete panel structure comprises, from bottom to top, a leveling glue layer, an asphalt wedge-shaped body, an asphalt concrete thickening layer, a polyester grid, and an asphalt concrete anti-seepage layer.

[0011] The leveling glue layer and the asphalt wedge-shaped body abut against the side surface of the concrete connecting plate, and the asphalt concrete thickening layer, the polyester grid, and the asphalt concrete anti-seepage layer extend to the upper surface of the second connecting layer and abut against the side surface of the first connecting layer.

[0012] A slip layer is arranged between the asphalt concrete thickening layer and the second connecting layer.

[0013] An asphalt waterproof roll is arranged between the lower surface of the second geomembrane and the upper surface of the asphalt concrete panel structure, and the lower surface of the second geomembrane is fixed on the asphalt waterproof roll by a butyl tape.

[0014] A reserved bulge is arranged on the side of the first geomembrane close to the concrete connecting plate, a three-dimensional composite drainage net is arranged above the reserved bulge, the three-dimensional composite drainage net is located below the first geomembrane, and fine-grained filling material is filled in the reserved bulge.

[0015] A plastic water stop bulge is arranged on the side of the second geomembrane covering the anchoring structure, a chloroprene rubber sheet is arranged above the plastic water stop bulge, the chloroprene rubber sheet is located below the second geomembrane, and a plastic water stop material is arranged in the plastic water stop bulge.

[0016] Asphalt mastic is brushed on the upper surface of the asphalt concrete panel structure which is not covered by the second geomembrane.

[0017] Compared with the prior art, the application uses the concrete connecting plate as the connecting structure of the first geomembrane and the asphalt concrete panel structure, the first geomembrane is anchored on the concrete connecting plate by using the anchoring structure, and the second geomembrane is bonded with the asphalt concrete panel structure and covers the first geomembrane, so that the concrete connecting plate and the first geomembrane on the high filling body can better adapt to the deformation caused after water storage, and the leakage risk caused by the disconnection of the anti-seepage joint after the deformation of the concrete connecting plate is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the planar arrangement structure of the application.

[0019] Figure 2 It is a schematic diagram of the planar arrangement structure of the application. Figure 1 DETAILED DESCRIPTION

[0020] In order for those skilled in the art to better understand the technical solutions of the application, the preferred embodiments of the application are described below in combination with specific examples, and the examples are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar functional elements throughout the drawings, but it should be understood that the drawings are only used for illustrative description and cannot be understood as a limitation on the application; in order to better illustrate the embodiments, some components in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size; 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 description and cannot be understood as a limitation on the application.

[0021] The application is further described below in combination with the drawings and examples, but it is not used as a basis for limiting the application.

[0022] The application provides a geomembrane and asphalt concrete panel anti-seepage connecting structure on a high filling body, which comprises a concrete connecting plate 4 arranged on the filling body 5, a first geomembrane 1 arranged above the concrete connecting plate 4, an anchoring structure 6 arranged on one side of the first geomembrane 1 and used for fixing the first geomembrane 1 to the concrete connecting plate 4, an asphalt concrete panel structure 3 arranged above one side of the concrete connecting plate 4, a second geomembrane 2 arranged above 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, and the second geomembrane 2 being welded to the first geomembrane 1 and forming a single-sided welding area 7 at the welded position.

[0023] The anchoring structure 6 comprises an angle steel 22 and a bolt 23, both of which are made of stainless steel, the first geomembrane 1 is anchored on the concrete connecting plate 4 by the angle steel 22 and the bolt 23, and the anchoring spacing is 30-45 cm. ​

[0024] The edge of the second geomembrane 2 is sealed by a closed waterproof roll 19.

[0025] The concrete connecting plate 4 is two-layer stepped, and the layer connected with the first geomembrane 1 is the first connecting layer 41, and the layer connected with the asphalt concrete panel structure 3 is the second connecting layer 42, and the first connecting layer 41 is higher than the second connecting layer 42.

[0026] The asphalt concrete panel structure 3 comprises, from bottom to top, a leveling glue layer 17, an asphalt wedge 16, an asphalt concrete thickening layer 14, a polyester grid 13, and an asphalt concrete anti-seepage layer 12.

[0027] The asphalt wedge 16 is used to coordinate local uneven deformation.

[0028] The leveling glue layer 17 and the asphalt wedge 16 abut against the side surface of the concrete connecting plate 4, and the asphalt concrete thickening layer 14, the polyester grid 13, and the asphalt concrete anti-seepage layer 12 extend to the upper surface of the second connecting layer 42 and abut against the side surface of the first connecting layer 41.

[0029] A slip layer 15 is arranged between the asphalt concrete thickening layer 14 and the second connecting layer 42, which can adapt to certain deformation, especially horizontal deformation.

[0030] An asphalt waterproof roll 11 is arranged between the lower surface of the second geomembrane 2 and the upper surface of the asphalt concrete panel structure 3, and the lower surface of the second geomembrane 2 is fixed on the asphalt waterproof roll 11 by a butyl tape 10.

[0031] The second geomembrane 2 is bonded by the butyl tape 10 and the asphalt waterproof roll 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 damage occurs at this part, the anti-seepage safety can be ensured.

[0032] The butyl tape 10 is a copolymer of isobutylene and isoprene, which has good chemical stability and thermal stability, and most notably, air tightness and water tightness, and good bonding performance for geomembranes and asphalt-based materials.

[0033] The butyl tape and the asphalt waterproof roll have good bonding performance, and indoor 1:1 simulation tests show that under the action of 0.4 MPa pressure (40 meters of water head), the bonding structure has no leakage, water seepage and other abnormal conditions, fully indicating that the bonding structure can adapt to the operation conditions of low water head reservoirs and dams.

[0034] The first geomembrane 1 is provided with a reserved bump 21 near one side of the concrete connecting plate 4, a three-dimensional composite drainage net 20 is arranged above the reserved bump 21, the three-dimensional composite drainage net 20 is located below the first geomembrane 1, and the first geomembrane 1 can be ensured not to be damaged by being pierced under the condition of water pressure, and the reserved bump 21 is filled with fine particle filling material, so that uneven deformation between different structures is offset, and the first geomembrane 1 is ensured not to be torn.

[0035] The second geomembrane 2 is provided with a plastic waterstop bump 8 covering the circumferential side of the anchoring structure 6, a neoprene sheet 9 is arranged above the plastic waterstop bump 8, the neoprene sheet 9 is located below the second geomembrane 2, and the second geomembrane 2 can be ensured not to be pierced by the anchoring structure 6, the plastic waterstop bump 8 is provided with plastic waterstop material, if the overlapping part of the asphalt concrete panel structure 3 and the concrete connecting plate 4 is deformed and separated, under the action of water pressure, the plastic waterstop material can fill the gap and defects possibly generated by deformation of the asphalt concrete panel structure 3 and the concrete connecting plate 4, and water leakage is avoided.

[0036] The upper surface of the asphalt concrete panel structure 3 is brushed with asphalt mastic 18 in a place not covered by the second geomembrane 12.

[0037] According to the description and drawings of the present application, a person skilled in the art can easily manufacture or use the high filling body geomembrane and asphalt concrete panel anti-seepage connecting structure of the present application, and the positive effects of the present application can be generated.

[0038] It should be noted that the terms “including” and “having” and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. The terms “mounting”, “arrangement”, “provided with”, “connected”, “connected”, “sleeved” should be understood broadly. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two mechanisms, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms “one end”, “the other end”, “outer side”, “inner side”, “horizontal”, “end”, “length”, “outer end”, “left”, “right” and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated mechanism or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The terms “first” and “second” are only used for the convenience of description, and do not indicate or imply relative importance.

[0040] Furthermore, those skilled in the art will recognize that changes can be made to the disclosed embodiments, and in the absence of a specific disclosure, changes could be made that fall within the scope of the application. Still further, means-plus-function or step-plus-function limitations are not intended to confine the scope of the claims to the means or steps described in the specification. In addition, no element, component, or step in the present disclosure can be construed as critical or essential unless the disclosure relates expressly and unequivocally to a different embodiment.

[0041] The above description is only the preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any equivalent changes and modifications made to the present application are intended to fall within the scope of the present application, and are not listed one by one here.

Claims

1. A seepage-proof connection structure between a geomembrane and an asphalt concrete panel on a high embankment, characterized in that, The system includes a concrete connecting plate (4) set on the fill body (5), a first geomembrane (1) set 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) set above the side of the concrete connecting plate (4), a second geomembrane (2) set 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 above the first geomembrane (1) and covering the anchoring structure (6), the second geomembrane (2) being welded to the first geomembrane (1) and the welded area forming a single-sided welded area (7); The edges of the second geomembrane (2) are sealed with a waterproof membrane (19); The second geomembrane (2) covers the periphery of the anchoring structure (6) and is provided with a plastic water-stopping bulge (8). A neoprene rubber sheet (9) is provided above the plastic water-stopping bulge (8). The neoprene rubber sheet (9) is located below the second geomembrane (2). Plastic water-stopping material is provided inside the plastic water-stopping bulge (8).

2. The seepage-proof connection structure between geomembrane and asphalt concrete panel on a high embankment as described in claim 1, characterized in that, The concrete connecting plate (4) is a two-layer stepped shape. The layer connecting the asphalt concrete panel structure (3) to the first geomembrane (1) is the first connecting layer (41), and the layer connecting the asphalt concrete panel structure (3) to 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).

3. The seepage-proof connection structure between geomembrane and asphalt concrete panel on a high embankment as described in claim 2, characterized in that, The asphalt concrete panel structure (3) includes, in order from bottom to top, 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).

4. The seepage-proof connection structure between geomembrane and asphalt concrete panel on a high embankment as described in claim 3, characterized in that, 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).

5. The seepage-proof connection structure between geomembrane and asphalt concrete panel on a high embankment as described in claim 4, characterized in that, A slip layer (15) is provided between the asphalt concrete thickened layer (14) and the second connecting layer (42).

6. The seepage-proof connection structure between geomembrane and asphalt concrete panel on a high embankment as described in claim 1, characterized in that, An asphalt waterproof membrane (11) is provided 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 waterproof membrane (11) by butyl tape (10).

7. The seepage-proof connection structure between geomembrane and asphalt concrete panel on a high embankment as described in claim 1, characterized in that, The first geomembrane (1) has a reserved bulge (21) on one side near the concrete connecting plate (4). A three-dimensional composite drainage net (20) is set above the reserved bulge (21). The three-dimensional composite drainage net (20) is located below the first geomembrane (1). The reserved bulge (21) is filled with fine granular filler.

8. The seepage-proof connection structure between geomembrane and asphalt concrete panel on a high embankment as described in claim 1, characterized in that, The upper surface of the asphalt concrete panel structure (3) not covered by the second geomembrane (2) is coated with asphalt mastic (18).

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