CN217298797U - Asphalt concrete panel-geomembrane anti-seepage system - Google Patents
Asphalt concrete panel-geomembrane anti-seepage system Download PDFInfo
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- CN217298797U CN217298797U CN202121339972.5U CN202121339972U CN217298797U CN 217298797 U CN217298797 U CN 217298797U CN 202121339972 U CN202121339972 U CN 202121339972U CN 217298797 U CN217298797 U CN 217298797U
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- geomembrane
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- asphalt concrete
- concrete panel
- seepage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
Abstract
The utility model provides an asphalt concrete panel-geomembrane anti-seepage system, which comprises an asphalt concrete panel, a geomembrane, an anti-seepage cover plate and an edge banding agent; the geomembrane covers the asphalt concrete panel and is directly anchored and connected with the asphalt concrete panel; the anti-seepage cover sheet covers the anchoring joint and the upper part of the geomembrane at the periphery of the anchoring joint, and the edge of the anti-seepage cover sheet is connected with the asphalt concrete panel through the edge sealing agent. The technical scheme not only simplifies the connection anti-seepage structure, but also solves the problems of poor adaptive deformation capability, poor safety and reliability and difficult guarantee of construction quality in the traditional concrete connecting plate, geomembrane and asphalt concrete anti-seepage connecting system due to large material rigidity difference.
Description
Technical Field
The utility model relates to a connection seepage prevention structure of asphalt concrete and geomembrane.
Background
In water conservancy and hydropower engineering, geomembranes and asphalt concrete are efficient and environment-friendly impermeable materials, and are widely applied to impermeable engineering of reservoirs, dams and the like. The geomembrane has the advantages of excellent seepage-proofing performance, high tensile strength, strong adaptive deformability, good corrosion resistance and low engineering cost; the asphalt concrete has the characteristics of good anti-seepage performance, good integrity, no joint, high construction mechanization efficiency, easy maintenance and the like. However, since the strength of the asphalt concrete is low, it is difficult to directly anchor the impermeable body such as the geomembrane to the asphalt concrete panel with a large mechanical anchoring force. When the reservoir basin and the dam bank slope adopt two or more seepage prevention types, for example, the reservoir basin adopts geomembrane seepage prevention, and the dam bank slope adopts asphalt concrete seepage prevention.
At the junction of two anti-seepage structures, the conventional connection scheme at present is to arrange a concrete connection plate between the geomembrane and the asphalt concrete panel, as disclosed in chinese utility model patent CN 208762966U. This approach has the following problems: (1) the adaptability to deformation is poor. Because the geomembrane and the asphalt concrete panel are respectively connected with the concrete connecting plate, the rigidity difference of the three materials is large, and the connecting structure has poor adaptability to deformation. (2) And the safety and reliability are poor. Three different material structures of the geomembrane, the asphalt concrete panel and the concrete connecting plate are connected complicatedly, and under the condition that the reservoir water level changes frequently, the anti-seepage structure has poor reliability and is easy to leak. (3) The construction quality is difficult to guarantee. Because the construction process that the concrete connecting plate is connected with geomembrane and asphalt concrete is comparatively complicated, easily form mutual interference in the work progress, therefore its quality is difficult to effectively guarantee. Therefore, how to adopt a systematic and effective method to avoid the defects of the concrete connecting plate and the geomembrane and asphalt concrete anti-seepage connecting structure system to form an anti-seepage structure which is directly overlapped with the geomembrane and the asphalt concrete panel and is suitable for large slippage deformation is an urgent need consideration in the field of anti-seepage treatment of hydraulic and hydroelectric engineering.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the shortcoming that exists among the prior art, provide a geomembrane and asphalt concrete panel lug connection and can adapt to the prevention of seepage system that slides deformation greatly.
In order to realize the purpose, the utility model adopts the technical scheme as follows:
the asphalt concrete panel-geomembrane anti-seepage system comprises an asphalt concrete panel, a geomembrane, an anti-seepage cover sheet and an edge sealing agent; the geomembrane covers the asphalt concrete panel and is directly anchored and connected with the asphalt concrete panel; the anti-seepage cover sheet covers the anchoring joint and the upper part of the geomembrane at the periphery of the anchoring joint, and the edge of the anti-seepage cover sheet is connected with the asphalt concrete panel through the edge sealing agent.
Further, the anchoring connection part comprises epoxy mortar, an anchoring screw and angle steel; epoxy mortar is filled in the position corresponding to anchoring in the asphalt concrete panel, the anchoring screw is planted in the epoxy mortar, the angle steel compresses the anti-seepage cover sheet, and the geomembrane, the anti-seepage cover sheet and the angle steel are sleeved on the anchoring screw in a penetrating way and are fastened by bolts.
Furthermore, an SR primer and a plastic water-stopping leveling layer are arranged between the anti-seepage cover plate and the asphalt concrete panel.
Further, the anchoring connection comprises a first anchoring and a second anchoring; the second anchoring is staggered with the first anchoring in the position plane of each anchor hole.
Furthermore, plastic filler is arranged between the first anchoring and the second anchoring; the plastic filler is arranged below the anti-seepage cover plate in a bulge mode, and the geomembrane is inserted into the plastic filler.
Furthermore, the diameter of the geotextile preformed hole and the diameter of the preformed hole of the anti-seepage cover sheet at the first anchoring position are larger than the diameter of the anchoring screw at the first anchoring position; the diameter of the preformed hole of the anti-seepage cover sheet positioned at the second anchoring position is the same as that of the anchoring screw rod at the second anchoring position.
Furthermore, the diameter of the geotextile preformed hole at the anchoring connection part is larger than that of the anchoring screw at the anchoring connection part.
Further, the geomembrane is disposed only at the first anchor.
The utility model has the advantages that:
according to the technical scheme, the geomembrane is directly anchored and connected with the asphalt concrete panel, and a concrete connecting plate is omitted, so that the connection seepage-proofing structure is simplified, and the problems of poor deformation adaptability, poor safety and reliability and difficult guarantee of construction quality caused by large material rigidity difference in the traditional concrete connecting plate, geomembrane and asphalt concrete seepage-proofing connecting system are solved. And the geomembrane and the asphalt concrete are both good in flexibility, the deformation capacity of the geomembrane and the asphalt concrete can be obviously improved when the geomembrane and the asphalt concrete bear a certain reservoir operation water head, and the geomembrane and the asphalt concrete are particularly suitable for the condition that the reservoir water level of a pumped storage power station changes frequently. Meanwhile, the system is combined with the SR primer, the plastic water stop material leveling layer, the elastic edge sealing agent, the anti-seepage cover plate and the like, so that the effect of assisting in anti-seepage can be achieved, and the anti-seepage performance of the connecting structure is improved to the maximum extent.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a plan layout view of the anchor holes of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Reference is made to the accompanying drawings. The embodiment aims at a medium-high water head project (generally, a project with a water head of more than 30 m), and comprises an asphalt concrete panel 1, a geomembrane 5, a first anchor 2, a second anchor 3, an anti-seepage cover sheet 8 and a sealing agent 11; the first anchor 2 and the second anchor 3 both comprise elastic epoxy mortar 4, anchor screws 6 and stainless steel angle steel 7. The impermeable cover sheet 8 is preferably an ethylene propylene diene monomer impermeable protective cover sheet, and is easy to be attached to the asphalt concrete panel 1 by utilizing the characteristic that the impermeable cover sheet is better than the geomembrane 5 in flexibility, so that the seepage diameter is prolonged, the auxiliary impermeable effect is improved, and the seepage amount is reduced. The geomembrane 5 is made of HDPE or PVC geomembrane with the thickness of 0.5-2.5 mm.
The geomembrane 5 covers the surface of the asphalt concrete panel 1, and an impermeable cover sheet 8 is arranged at the upper part of the geomembrane. The geomembrane 5 and the anti-seepage cover sheet 8 are sequentially fixed on the asphalt concrete panel 1 by the first anchor 2, and the other side of the anti-seepage cover sheet 8 is fixed on the asphalt concrete panel 1 by the second anchor 3 in a reinforcing way, so that the edge of the geomembrane 5 is positioned below the anti-seepage cover sheet 8 between the first anchor 2 and the second anchor 3, and the anti-seepage effect of the system is improved. Specifically, a plurality of drill holes at the first anchor 2 are filled with elastic epoxy mortar 4, anchor screws 6 are embedded in the epoxy mortar 4, and a geomembrane 5 and an impermeable cover plate 8 are sleeved on the anchor screws 6 through respective preformed holes and are fastened by bolts after being compacted and flattened through stainless steel angle steel 7. The asphalt concrete anti-seepage panel in the embodiment has the thickness of 8-10 cm, and the thickness of the anchoring part is about 20cm, so that even if the thickness of the planting screw rod is subtracted by 8cm, the thickness of the bottom part is still 10-12 cm, and a good anti-seepage effect can be achieved. And indoor tests show that the anchoring hole backfilled with the elastic epoxy mortar 4 has reliable seepage-proofing capability, and the anchoring hole does not leak under the pressure of 0.5 MPa.
The first anchoring bore 13 may be one or two rows depending on the actual situation. The preferred hole pitch is 0.5-1.0 m, the hole depth is 8-10 cm, and the hole diameter is 6-10 cm. The water heads can be arranged in a row according to the height of the water heads for engineering application and the low water heads, and the distance is a large value; if two rows of drill holes are adopted, the preferred row spacing is 0.5-1.2 m, and the first row of drill holes and the second row of drill holes are staggered, so that the stability of the asphalt concrete panel 1 after anchoring connection is facilitated. And backfilling elastic epoxy mortar 4 after drilling. The epoxy mortar 4 is a consolidation body which is formed by mixing and curing epoxy resin serving as a main agent and a series of auxiliary agents such as an accelerant and the like, has high strength, high binding power and low elastic modulus, has excellent anti-permeability, anti-freezing, saline-alkali resistance, weak acid resistance and corrosion resistance, has good adaptability with asphalt concrete, and can bear applied fastening force. The distance between the anchoring screws 6 is preferably 0.5-0.7 m. It should be noted that the diameter of the prepared hole of the geomembrane 5 is required to be larger than that of the anchoring screw 6, so as to reserve a certain slip deformation margin. The depth of the anchoring screw 6 embedded in the elastic epoxy mortar 4 is 8cm, and the diameter is 1 cm. Thus, the geomembrane 5 prepared hole diameter of the present embodiment is 4 cm. The type of the angle steel 7 can be selected from the range of less than 50 x 5mm to less than 70 x 6mm, and the angle steel is disconnected at intervals of 1.5-3 m, so that the angle steel has better adaptive deformability. After the angle steel 7 exerts fastening force, indoor tests show that the leakage condition can not occur under the water pressure of 0.5 MPa.
For medium and high head projects of this embodiment, a second anchor 3 is required. If not, there may be only a first pass of anchoring 2. The anchoring type of the second anchoring 3 is similar to that of the first anchoring 2, and the anti-seepage cover plate 8 penetrates through the anchoring screw 6 at the second anchoring 3 and is flattened through the stainless steel angle steel 7 and then is fastened through a bolt. Here, the diameter of the reserved anchoring hole of the anti-seepage cover sheet 8 is the same as that of the screw 6. The anchoring distance of the second anchoring 3 is properly increased to about 1m, and the plane of the second anchoring drill hole 14 is staggered with that of the first anchoring drill hole 13, so that the integral of the asphalt concrete panel 1 is prevented from being excessively weakened.
A plastic filler 9 is arranged between the first anchor 2 and the second anchor 3; the plastic filler 9 is arranged below the anti-seepage cover sheet 8 in a bulge shape and is completely covered by the anti-seepage cover sheet 8, and the edge of the geomembrane 5 is inserted into the plastic filler 9. The plastic filler 9 can be made of SR plastic water-stop material and the like to adapt to the sliding deformation of the connecting structure, reserve deformation allowance for the geomembrane 5 and play a role in assisting seepage prevention.
If the project only needs the first anchoring 2, the plastic filler 9 is not needed, and the anti-seepage cover sheet 8 is directly extended and bonded on the asphalt panel 1 and sealed by the edge sealing agent 11.
SR primer and plastic water-stopping leveling layer 10 are arranged between the anti-seepage cover sheet 8 and the asphalt concrete panel 1, so that the two can be well bonded, and the auxiliary anti-seepage effect is ensured. The edge of the anti-seepage cover sheet 8 is connected with the asphalt concrete panel 1 through an elastic edge sealing agent 11 so as to ensure the anti-seepage capability of the edge of the anti-seepage cover sheet 8.
And a filling body 12 is arranged below the asphalt concrete anti-seepage panel 1 and is used as a supporting structure of an anti-seepage system.
The specific implementation steps of this embodiment are as follows:
step A: drilling holes at the appointed position of the asphalt concrete panel 1 for coring, wherein the holes are drilled in 1-2 rows, the row spacing is 0.5-1.2 m, the hole spacing is 0.5-1.0 m, the hole depth is 8-10 cm, and the hole diameter is 6-10 cm.
And B, step B: cleaning and drying the holes, backfilling elastic epoxy mortar 4 and planting an anchoring screw 6.
And C: and sequentially brushing SR base glue and a first SR plastic water stop material leveling layer 10 from bottom to top along the connecting line direction of the first anchoring hole, sleeving the geomembrane 5 with a reserved hole with the diameter of 4cm into the screw rod 6, covering the ethylene propylene diene monomer anti-seepage cover sheet 8 and the stainless steel angle steel 7, and fastening by adopting bolts.
Step D: and arranging a plastic filler 9 bulge between the two anchors, inserting the geomembrane of the first anchor into the plastic filler 9 bulge, and integrally coating the plastic filler 9 bulge by adopting an ethylene propylene diene monomer cover plate 8.
Step E: and sequentially brushing SR base glue and a second SR plastic water-stop material leveling layer 10 from bottom to top along the connecting line direction of the second anchoring hole, sleeving an ethylene propylene diene monomer anti-seepage cover sheet 8 with a hole of 1cm in diameter into the screw 6 and the stainless steel angle steel 7, and fastening by adopting bolts.
Step F: and sequentially brushing SR base glue and an SR material leveling layer 10 along the side direction of the asphalt concrete panel 1, extending the ethylene propylene diene monomer anti-seepage cover sheet 8, and sealing the edges by using an elastic edge sealing agent 11.
It should be noted that the above describes example embodiments of the invention. However, it should be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, which are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the scope of the present invention, and the changes and modifications are intended to fall within the scope of the present invention as claimed.
Claims (8)
1. The asphalt concrete panel-geomembrane anti-seepage system is characterized by comprising an asphalt concrete panel, a geomembrane, an anti-seepage cover sheet and an edge sealing agent; the geomembrane covers the asphalt concrete panel and is directly anchored and connected with the asphalt concrete panel; the anti-seepage cover sheet covers the anchoring joint and the upper part of the geomembrane at the periphery of the anchoring joint, and the edge of the anti-seepage cover sheet is connected with the asphalt concrete panel through the edge sealing agent.
2. The asphalt concrete panel-geomembrane impermeable system of claim 1, wherein said anchoring joints comprise epoxy mortar, anchoring screws, and angle iron; the epoxy mortar is filled in the position corresponding to anchoring in the asphalt concrete panel, the anchoring screw is planted in the epoxy mortar, the angle steel compresses the anti-seepage cover sheet, and the geomembrane, the anti-seepage cover sheet and the angle steel are sleeved on the anchoring screw in a penetrating manner and are fastened by bolts.
3. The asphalt concrete panel-geomembrane impermeable system according to claim 1, wherein an SR primer and a plastic water-stop leveling layer are further provided between the impermeable cover sheet and the asphalt concrete panel.
4. The asphalt concrete panel-geomembrane barrier system according to claim 1, 2 or 3, wherein said anchor connection comprises a first anchor and a second anchor; and the position planes of the anchor holes of the second anchoring and the first anchoring are staggered.
5. The asphalt concrete panel-geomembrane anti-seepage system according to claim 4, wherein a plastic filler is disposed between said first anchor and said second anchor; the plastic filler is arranged below the anti-seepage cover plate in a bulge mode, and the geomembrane is inserted into the plastic filler.
6. The asphalt concrete panel-geomembrane anti-seepage system according to claim 4, wherein a diameter of a geotextile pre-hole at the first anchoring and a diameter of a pre-hole of the anti-seepage cover sheet are larger than a diameter of an anchoring screw at the first anchoring; and the diameter of the preformed hole of the anti-seepage cover sheet positioned at the second anchoring position is the same as that of the anchoring screw rod at the second anchoring position.
7. The asphalt concrete panel-geomembrane impermeable system according to claim 2, wherein a geotextile prepared hole diameter at the anchoring connection is larger than the anchoring screw diameter at the anchoring connection.
8. The asphalt concrete panel-geomembrane barrier system according to claim 4, wherein said geomembrane is disposed only at said first anchor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121339972.5U CN217298797U (en) | 2021-06-16 | 2021-06-16 | Asphalt concrete panel-geomembrane anti-seepage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121339972.5U CN217298797U (en) | 2021-06-16 | 2021-06-16 | Asphalt concrete panel-geomembrane anti-seepage system |
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| Publication Number | Publication Date |
|---|---|
| CN217298797U true CN217298797U (en) | 2022-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121339972.5U Active CN217298797U (en) | 2021-06-16 | 2021-06-16 | Asphalt concrete panel-geomembrane anti-seepage system |
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| CN (1) | CN217298797U (en) |
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2021
- 2021-06-16 CN CN202121339972.5U patent/CN217298797U/en active Active
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