CN210636386U - Reservoir seepage prevention structure for dam face of rock-fill dam and backfill reservoir bottom of soil and stone materials - Google Patents
Reservoir seepage prevention structure for dam face of rock-fill dam and backfill reservoir bottom of soil and stone materials Download PDFInfo
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- CN210636386U CN210636386U CN201920909772.5U CN201920909772U CN210636386U CN 210636386 U CN210636386 U CN 210636386U CN 201920909772 U CN201920909772 U CN 201920909772U CN 210636386 U CN210636386 U CN 210636386U
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Abstract
The utility model provides a reservoir seepage-proofing structure of a rock-fill dam face and a soil and stone backfill reservoir bottom, wherein the upstream slope of the rock-fill dam is seepage-proofing by adopting an asphalt concrete seepage-proofing panel, and the asphalt concrete seepage-proofing panel adopts a simple section; the reservoir bottom is impervious by adopting a composite geomembrane, and the composite geomembrane is pressed by adopting a sand bag; the connection between the asphalt concrete seepage-proofing panel and the geomembrane at the bottom of the reservoir adopts a seepage-proofing post-pouring belt; a copper sheet is arranged between the rock-fill dam asphalt concrete seepage-proofing panel and the post-cast strip for water stop; and the lap joint of the reservoir bottom anti-seepage composite geomembrane and the post-cast strip adopts coating polyurea to bond. The utility model discloses can satisfy prevention of seepage system confined requirement, also can adapt to the characteristic of dam body and the big deformation of storehouse end filler simultaneously to and the stable requirement of each contact surface infiltration of position is connected in the operation, solve rock-fill dam asphalt concrete prevention of seepage panel and the key technical problem of prevention of seepage system design in the compound geomembrane combined construction storehouse scheme of soil stone material backfill storehouse end.
Description
The technical field is as follows:
the utility model relates to a water conservancy water and electricity and pumped storage engineering field relate to the retaining dam and adopt asphalt concrete prevention of seepage panel rock-fill dam, and the reservoir engineering of earth and rock sediment material backfill and compound geomembrane prevention of seepage is adopted at the bottom of the reservior.
Background art:
in water conservancy, hydropower and pumped storage engineering, in order to overcome the needs of unfavorable geological conditions and earth-rock square balance, the scheme of retaining water by a rock-fill dam and backfilling earth and rock at the bottom of a reservoir and discarding slag has better engineering adaptability and economical efficiency, and becomes a frequently-adopted scheme for building the reservoir. Meanwhile, the asphalt concrete anti-seepage panel and the composite geomembrane are adopted as anti-seepage bodies because of good anti-seepage performance and strong adaptive deformability. The key technical problem lies in the integrity and reliability of the rock-fill dam and the reservoir bottom seepage-proofing system, wherein the connection between the asphalt concrete seepage-proofing face plate of the dam face and the reservoir bottom seepage-proofing geomembrane is a weak link and is the key of the engineering seepage-proofing system design.
The utility model has the following contents:
the utility model aims at providing a rock-fill dam asphalt concrete seepage-proofing panel with the compound geomembrane combination's of soil stone material backfill bottom of the reservoir seepage prevention structure, solve the key technical problem in the reservoir seepage prevention system design of rock-fill dam facing and soil stone material backfill bottom of the reservoir. Therefore, the utility model adopts the following technical scheme:
a reservoir seepage prevention structure for a rock-fill dam face and a soil and stone backfill reservoir bottom is characterized in that a reservoir basin adopts a rock-fill dam to retain water, and soil and stone slag materials fill the reservoir bottom; the method is characterized in that:
the upstream slope of the rockfill dam is impervious by an asphalt concrete seepage-proofing panel, and the asphalt concrete seepage-proofing panel is of a simple section;
the reservoir bottom is impervious by adopting a composite geomembrane, and the composite geomembrane is pressed by adopting a sand bag;
the connection between the asphalt concrete seepage-proofing panel and the geomembrane at the bottom of the reservoir adopts a seepage-proofing post-pouring belt;
a copper sheet is arranged between the rock-fill dam asphalt concrete seepage-proofing panel and the post-cast strip for water stop;
and the lap joint of the reservoir bottom anti-seepage composite geomembrane and the post-cast strip adopts coating polyurea to bond.
Further, the asphalt concrete anti-seepage panel adopts a simple section.
Furthermore, the anti-seepage post-cast strip is a modified asphalt concrete post-cast strip.
Furthermore, the composite geomembrane lapped with the anti-seepage post-cast strip adopts a single-side roughening specification to strengthen the bonding strength.
Further, the asphalt concrete anti-seepage panel is sequentially provided with a cushion layer, a transition layer and a dam body rockfill material below.
Further, the composite geomembrane sequentially comprises a geotechnical mat, a cushion layer, a transition layer and earth and stone backfill.
Furthermore, the dam foot of the rock-fill dam is connected with the backfill material at the bottom of the reservoir by adopting an arc transition section, and the curvature radius of the arc transition section is not less than 30m for convenient construction.
Furthermore, the width of the anti-seepage post-pouring belt is 3-5 m, and the anti-seepage post-pouring belt is rolled and paved along the full length of the dam foot without seams.
Because of adopting the technical scheme of the utility model, the utility model discloses can ensure effective connection that the compound geomembrane of bottom of the storehouse was backfilled to the building stones that rock-fill dam asphalt concrete prevention of seepage panel and, can satisfy prevention of seepage system confined requirement, also can adapt to the characteristic that dam body and bottom of the storehouse fill material large deformation simultaneously to and the requirement that each contact surface of position infiltration is stable is connected in the period of operation, solve rock-fill dam asphalt concrete prevention of seepage panel and the building stones and backfill the key technical problem of prevention of seepage system design in the compound geomembrane of bottom of the storehouse scheme.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a sectional view a-a of fig. 1.
Detailed Description
Referring to the attached drawings, the utility model provides a rock-fill dam facing and the reservoir seepage prevention structure of the bottom of the storehouse is backfilled to the native building stones, and reservoir storehouse basin adopts rock-fill dam 100 manger plates, and the bottom of the storehouse is filled to the native building stones material.
The upstream slope surface of the rockfill dam is impermeable by adopting an asphalt concrete impermeable panel 1, and the asphalt concrete impermeable panel 1 adopts a simple section; the reservoir bottom is paved with a composite geomembrane 2 for seepage prevention on the soil material 200, and the composite geomembrane 2 is compressed by adopting a sand bag 3; the asphalt concrete anti-seepage panel 1 and the reservoir bottom composite geomembrane 2 are connected by adopting a modified asphalt concrete post-cast strip 4; a copper sheet water stop 5 is arranged between the rock-fill dam asphalt concrete seepage-proofing panel 1 and the modified asphalt concrete post-cast strip 4; the reservoir bottom anti-seepage composite geomembrane 2 is connected with the modified asphalt concrete post-cast strip 4 and bonded by coating polyurea, the composite geomembrane 20 at the bonding part adopts a single-side roughening specification to enhance the bonding strength, and the lap joint length is not less than 1 m.
The asphalt concrete anti-seepage panel 1 is 20cm thick and has a simple section, the lower part of the panel is sequentially provided with a 3m thick cushion layer 11, a 4m thick transition layer 12 and a dam body rockfill, the cushion layer 11 can adopt artificial sand stones meeting the continuous grading, and the transition layer 12 can adopt the continuous grading blasting excavation stones.
The surface of the reservoir bottom composite geomembrane 2 is covered by a sand bag 3, and the lower part of the composite geomembrane is sequentially provided with a 0.6m thick geotechnical mat 21, a 1.5m thick mat layer 22, a 1.5m thick transition layer 23 and an earth and stone backfill 200. The cushion layer 22 can adopt graded continuous natural sand gravel fine materials or artificial sand stones, and the transition layer 23 can adopt graded continuous natural sand gravel coarse materials or blasting excavation stones.
The dam foot of the rock-fill dam is connected with the backfill material at the bottom of the reservoir by adopting an arc transition section 6, and the curvature radius of the arc transition section is not less than 30m for convenient construction.
The thickness of the modified asphalt concrete post-cast strip is 20cm, the width is 3 m-5 m, and the modified asphalt concrete post-cast strip is rolled and paved along the dam foot through a warehouse without a seam.
The construction method of the reservoir seepage-proofing structure of the dam face of the rock-fill dam and the backfill reservoir bottom of the soil and stone materials comprises the following steps:
the main dam rockfill, the transition layer 12 and the cushion layer 11 in the concrete faced rockfill dam 100 are synchronously layered, rolled and filled, the filling standard of the concrete faced rockfill dam 100 is controlled according to the porosity, the main dam rockfill is generally not less than 22%, the transition layer 12 is generally not less than 20%, and the cushion layer 11 is generally not less than 19%.
And meanwhile, backfilling the basin of the reservoir, and sequentially carrying out construction of the soil stones 200 at the bottom of the reservoir, the transition layer 23, the cushion layer 22, the geotechnical mat 21, the composite geomembrane 2 and the sand bag 3 from bottom to top. The backfill of the foundation soil stone material 200 is controlled by more than 22 tons of vibration grinding according to the rolling times, not less than 6 times, and the filling standards of the transition layer 23 and the cushion layer 22 are controlled according to the porosity, not less than 22 percent.
And after the filling construction of the concrete faced rockfill dam 100 and the basin reservoir of the reservoir is finished, paving the asphalt concrete seepage-proofing panel 1 of the rockfill dam and laying the bottom copper sheet water stop 5, wherein the section of the panel 1 adopts a simple section.
Then, pouring the modified asphalt concrete post-cast strip 4, wherein the post-cast strip 4 is rolled by full-length paving without seams;
and cooling the post-cast strip modified asphalt concrete to the normal temperature of below 40 ℃, coating the coated polyurea 400 on the surface of the lap joint part of the post-cast strip modified asphalt concrete and the reservoir bottom anti-seepage composite geomembrane 2, and bonding the geomembrane at the lap joint part, wherein the geomembrane at the bonding part adopts a single-side roughening specification, and the lap joint length is not less than 1 m.
The above only is the concrete embodiment of the utility model, the technical features of the utility model are not limited thereto, and any person skilled in the relevant field is in the field of the utility model, and the changes or modifications are all covered in the protection scope of the utility model.
Claims (8)
1. A reservoir seepage prevention structure for a rock-fill dam face and a soil and stone backfill reservoir bottom is characterized in that a reservoir basin adopts a rock-fill dam to retain water, and soil and stone slag materials fill the reservoir bottom; the method is characterized in that:
the upstream slope of the rockfill dam is impervious by an asphalt concrete seepage-proofing panel, and the asphalt concrete seepage-proofing panel is of a simple section;
the reservoir bottom is impervious by adopting a composite geomembrane, and the composite geomembrane is pressed by adopting a sand bag;
the connection between the asphalt concrete seepage-proofing panel and the geomembrane at the bottom of the reservoir adopts a seepage-proofing post-pouring belt;
a copper sheet is arranged between the rock-fill dam asphalt concrete seepage-proofing panel and the post-cast strip for water stop;
and the lap joint of the reservoir bottom anti-seepage composite geomembrane and the post-cast strip adopts coating polyurea to bond.
2. The seepage-proofing structure of the reservoir at the dam face of the rock-fill dam and the backfill reservoir bottom of the earth and stone materials as claimed in claim 1, wherein: the asphalt concrete anti-seepage panel adopts a simple section.
3. The seepage-proofing structure of the reservoir at the dam face of the rock-fill dam and the backfill reservoir bottom of the earth and stone materials as claimed in claim 1, wherein: the anti-seepage post-cast strip is a modified asphalt concrete post-cast strip.
4. The seepage-proofing structure of the reservoir at the dam face of the rock-fill dam and the backfill reservoir bottom of the earth and stone materials as claimed in claim 1, wherein: the composite geomembrane lapped with the seepage-proofing post-cast strip adopts a single-side roughening specification to strengthen the bonding strength.
5. The seepage-proofing structure of the reservoir at the dam face of the rock-fill dam and the backfill reservoir bottom of the soil and stone materials as claimed in claim 1, wherein: the asphalt concrete seepage-proofing panel is sequentially provided with a cushion layer, a transition layer and dam body rockfill.
6. The seepage-proofing structure of the reservoir at the dam face of the rock-fill dam and the backfill reservoir bottom of the soil and stone materials as claimed in claim 1, wherein: the composite geomembrane is sequentially provided with a geotechnical mat, a cushion layer, a transition layer and an earth and stone backfill material.
7. The seepage-proofing structure of the reservoir at the dam face of the rock-fill dam and the backfill reservoir bottom of the soil and stone materials as claimed in claim 1, wherein: the dam foot of the rock-fill dam is connected with the backfill material at the bottom of the reservoir by adopting an arc transition section, and the curvature radius of the arc transition section is not less than 30 m.
8. The seepage-proofing structure of the reservoir at the dam face of the rock-fill dam and the backfill reservoir bottom of the soil and stone materials as claimed in claim 1, wherein: the width of the seepage-proof post-pouring belt is 3-5 m, and the seepage-proof post-pouring belt is rolled and paved along the full length of the dam foot without seams.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920909772.5U CN210636386U (en) | 2019-06-17 | 2019-06-17 | Reservoir seepage prevention structure for dam face of rock-fill dam and backfill reservoir bottom of soil and stone materials |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920909772.5U CN210636386U (en) | 2019-06-17 | 2019-06-17 | Reservoir seepage prevention structure for dam face of rock-fill dam and backfill reservoir bottom of soil and stone materials |
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| CN210636386U true CN210636386U (en) | 2020-05-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374060A (en) * | 2019-06-17 | 2019-10-25 | 中国电建集团华东勘测设计研究院有限公司 | A kind of the reservoir seepage-proofing structure and construction method of rock-fill dams dam facing and earth and stone material backfill bottom storehouse |
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2019
- 2019-06-17 CN CN201920909772.5U patent/CN210636386U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374060A (en) * | 2019-06-17 | 2019-10-25 | 中国电建集团华东勘测设计研究院有限公司 | A kind of the reservoir seepage-proofing structure and construction method of rock-fill dams dam facing and earth and stone material backfill bottom storehouse |
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