CN110374060A - 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 - Google Patents
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 Download PDFInfo
- Publication number
- CN110374060A CN110374060A CN201910520431.3A CN201910520431A CN110374060A CN 110374060 A CN110374060 A CN 110374060A CN 201910520431 A CN201910520431 A CN 201910520431A CN 110374060 A CN110374060 A CN 110374060A
- Authority
- CN
- China
- Prior art keywords
- rock
- seepage
- bottom storehouse
- fill dams
- earth
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
- E02B7/04—Dams across valleys
- E02B7/06—Earth-fill dams; Rock-fill dams
Abstract
The present invention provides the reservoir seepage-proofing structure and construction method of a kind of rock-fill dams dam facing and earth and stone material backfill bottom storehouse, the upstream slope surface of rock-fill dams uses asphalt concrete anti-seepage panel antiseepage, and asphalt concrete anti-seepage panel uses skeleton symbol section;The bottom storehouse uses impermeable composite geomembrane, uses sandbag apply pressure on composite geo-membrane;Connection uses water-impervious post-cast strip between the asphalt concrete anti-seepage panel and bottom storehouse geomembrane;Copper sheet sealing is set between the rock-fill dams asphalt concrete anti-seepage panel and post-cast strip;The bottom storehouse antiseepage composite geo-membrane and post-cast strip overlap joint are bonded using spreading type polyureas.The present invention is able to satisfy the closed requirement of seepage prevention system, dam body is also adapted to simultaneously and bottom storehouse fills the characteristic of material large deformation, and the requirement of each contact surface seepage stability of runtime connecting portion, it solves rock-fill dams asphalt concrete anti-seepage panel and earth and stone material backfill bottom storehouse composite geo-membrane group builds the key technical problem that seepage prevention system designs in the scheme of library jointly.
Description
Technical field:
The present invention relates to water conservancy and hydropowers and pumped-storage project field, are related to checkdam using asphalt concrete anti-seepage panel
Rock-fill dams, bottom storehouse is using native rock ballast material backfill and the reservoir engineering of impermeable composite geomembrane.
Technical background:
In water conservancy and hydropower and pumped-storage project, for the needs for overcoming unfavorable geological condition and earthworks calculation, using heap
Masonry dam water blocking, bottom storehouse backfill stone waste scheme have preferable engineering adaptability and economy, become through frequently with one kind
Build library scheme.Meanwhile asphalt concrete anti-seepage panel and composite geo-membrane are good because of barrier performance, adaptive deformation ability Qiang Erzuo
For impervious body use.Wherein key technical problem is the integrality and reliability of rock-fill dams and bottom storehouse seepage prevention system, wherein dam
The connection of face bituminous concrete face slab for water retaining and bottom storehouse anti-seepage geomembrane is weak link, is the pass of project seepage controlling System Design
Key.
Summary of the invention:
The object of the present invention is to provide the reservoir seepage-proofing structures of a kind of rock-fill dams dam facing and earth and stone material backfill bottom storehouse, solve heap
Key technical problem in the reservoir seepage-proofing System Design of masonry dam dam facing and earth and stone material backfill bottom storehouse.For this purpose, the present invention use with
Lower technical solution:
A kind of reservoir seepage-proofing structure of rock-fill dams dam facing and earth and stone material backfill bottom storehouse, Reservoir basin use rock-fill dams water blocking,
Native rock ballast material fills bottom storehouse;It is characterized by:
The upstream slope surface of the rock-fill dams uses asphalt concrete anti-seepage panel antiseepage, and asphalt concrete anti-seepage panel uses
Skeleton symbol section;
The bottom storehouse uses impermeable composite geomembrane, uses sandbag apply pressure on composite geo-membrane;
Connection uses water-impervious post-cast strip between the asphalt concrete anti-seepage panel and bottom storehouse geomembrane;
Copper sheet sealing is set between the rock-fill dams asphalt concrete anti-seepage panel and post-cast strip;
The bottom storehouse antiseepage composite geo-membrane and post-cast strip overlap joint are bonded using spreading type polyureas.
Further, asphalt concrete anti-seepage panel uses skeleton symbol section.
Further, the water-impervious post-cast strip uses modified asphalt concrete post-cast strip.
Further, rough specification is added using single side with overlapped for water-impervious post-cast strip composite geo-membrane, with reinforced cementitious strong
Degree.
Further, asphalt concrete anti-seepage panel next coming in order are bed course, transition zone and dam body stockpile.
Further, composite geo-membrane next coming in order are geotechnological straw mats, bed course, transition zone and native stone backfill material.
Further, it is connected between rock-fill dams base of dam and bottom storehouse backfill material using arc transition section, for convenience of constructing, circular arc
Changeover portion radius of curvature is not less than 30m.
Further, water-impervious post-cast strip width 3m~5m rolls making along base of dam is elongated, does not set seam.
A second object of the present invention is to provide the reservoir seepage-proofing structures of a kind of rock-fill dams dam facing and earth and stone material backfill bottom storehouse
Construction method.For this purpose, the invention adopts the following technical scheme:
The construction method of the reservoir seepage-proofing structure of rock-fill dams dam facing and earth and stone material backfill bottom storehouse, it is characterised in that the panel
The synchronous laying rolling and placement of key dam enrockment, transition zone, bed course, CFRD Embankment standard are controlled by porosity in rock-fill dams,
Key dam enrockment is typically no less than 22%, and transition zone is not less than 20%, and bed course is not less than 19%;
While with rock laying rolling and placement, the backfill of Reservoir basin is carried out, successively carries out library from bottom to top
Subsoil building stones, transition zone, bed course, geotechnological straw mats, composite geo-membrane and the construction of sandbag making;The backfill of bottom storehouse earth and stone material requires to use
22 tons or more vibrating rollers are controlled by number of rolling, and no less than 6 times, transition zone and bed course fill standard and control by porosity, not
Less than 22%;
After completing rock and Reservoir basin library filling construction, rock-fill dams asphalt concrete anti-seepage panel making is carried out
And bottom copper sheet sealing is laid;
It is modified bituminous concrete post-cast strip later to pour, post-cast strip is rolled using elongated making, does not set seam;
After post-cast strip modified asphalt concrete is cooled to room temperature 40 DEG C or less, with bottom storehouse antiseepage composite geo-membrane overlapping part
External coating spreading type polyureas, and overlapping part geomembrane bonding is carried out, bonded part geomembrane adds rough specification using single side, takes
Spreading degree is not less than 1m.
Due to use technical solution of the present invention, the present invention can ensure rock-fill dams asphalt concrete anti-seepage panel and soil
Building stones backfill effective connection of bottom storehouse composite geo-membrane, have both been able to satisfy the closed requirement of seepage prevention system, while also adapting to dam body
The characteristic of material large deformation and the requirement of each contact surface seepage stability of runtime connecting portion are filled with bottom storehouse, solve rock-fill dams
Asphalt concrete anti-seepage panel and earth and stone material backfill bottom storehouse composite geo-membrane group build the key that seepage prevention system designs in the scheme of library jointly
Technical problem.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
Fig. 2 is the A-A cross-sectional view of Fig. 1.
Specific embodiment
Referring to attached drawing, the reservoir seepage-proofing structure of rock-fill dams dam facing provided by the invention and earth and stone material backfill bottom storehouse, Reservoir
Basin uses 100 water blocking of rock-fill dams, and native rock ballast material fills bottom storehouse and impermeable composite geomembrane.
The upstream slope surface of the rock-fill dams uses 1 antiseepage of asphalt concrete anti-seepage panel, and asphalt concrete anti-seepage panel 1 is adopted
With skeleton symbol section;The bottom storehouse is laid with 2 antiseepage of composite geo-membrane on earth and stone material 200, uses sandbag on composite geo-membrane 2
3 apply pressures;Connection is poured after using modified asphalt concrete between the asphalt concrete anti-seepage panel 1 and bottom storehouse composite geo-membrane 2
Band 4;Copper sheet sealing 5 is set between the rock-fill dams asphalt concrete anti-seepage panel 1 and modified asphalt concrete post-cast strip 4;Institute
It states bottom storehouse antiseepage composite geo-membrane 2 and connect spreading type polyureas bonding, bonded part composite earth with modified asphalt concrete post-cast strip 4
Work film 20 adds rough specification using single side, and with reinforced cementitious intensity, the lap of splice is not less than 1m.
The thickness 20cm of asphalt concrete anti-seepage panel 1, is skeleton symbol section, and lower panels are followed successively by 3m hassock layer 11,4m
Thick transition zone 12 and dam body stockpile, the bed course 11, which preferably uses, meets the continuous artificial sand building stones of gradation, has both met for pitch
Concrete slab provides smooth firm basis, while playing the reverse filter effect to upstream face plate and downstream transition layer;The mistake
It crosses layer 12 and preferably uses the continuous Blasting Excavation building stones of gradation, it is poor in upstream bed course and downstream two kinds of deformation modulus of main enrockment to play
The effect of deformable transition between different biggish filling material subregion.
2 surface of bottom storehouse composite geo-membrane is covered using sandbag 3, and composite geo-membrane lower part is followed successively by geotechnological straw mats 21,1.5m
Hassock layer 22,1.5m thickness transition zone 23 and native stone backfill material 200.It is thin that the continuous nature aggregate of gradation can be used in the bed course 22
Material or artificial sand building stones provide smooth stable basis for top geomembrane and geotechnological straw mats;Grade can be used in the transition zone 23
With continuous nature aggregate coarse fodder or Blasting Excavation building stones, the base of enough bearing capacities and low compressibility is provided for top bed course
Plinth.
It is connected between rock-fill dams base of dam and bottom storehouse backfill material using arc transition section 6, for convenience of constructing, arc transition Duan Qu
Rate radius is not less than 30m.
The thickness 20cm of modified asphalt concrete post-cast strip, width 3m~5m lead to storehouse along base of dam and roll making, do not set seam.
The construction method of the reservoir seepage-proofing structure of rock-fill dams dam facing of the invention and earth and stone material backfill bottom storehouse are as follows:
The synchronous laying rolling and placement of key dam enrockment, transition zone 12, bed course 11, panel enrockment in the rock 100
Dam 100 fills standard and controls by porosity, and key dam enrockment is typically no less than 22%, and transition zone 12 is typically no less than 20%, bed course
11 are typically no less than 19%.
Carry out the backfill of Reservoir basin simultaneously, successively carry out from bottom to top bottom storehouse earth and stone material 200, transition zone 23, bed course 22,
Geotechnological straw mats 21, composite geo-membrane 2 and the construction of 3 making of sandbag.The backfill of bottom storehouse earth and stone material 200 requires to use 22 tons or more vibrating rollers
It is controlled by number of rolling, no less than 6 times, transition zone 23 and bed course 22 fill standard and control by porosity, are not less than 22%.
After completing rock 100 and Reservoir basin library filling construction, rock-fill dams asphalt concrete anti-seepage panel 1 is carried out
Making and bottom copper sheet sealing 5 are laid, and 1 section of panel uses skeleton symbol section.Asphalt concrete face slab bed course preferably uses artificial paving
It builds.
It is modified bituminous concrete post-cast strip 4 later to pour, post-cast strip 4 is rolled using elongated making, does not set seam;
After post-cast strip modified asphalt concrete is cooled to room temperature 40 DEG C or less, with 2 clinch of bottom storehouse antiseepage composite geo-membrane
Position external coating spreading type polyureas 400, and overlapping part geomembrane bonding is carried out, bonded part geomembrane adds rough rule using single side
Lattice, the lap of splice are not less than 1m.
The foregoing is merely the specific implementation case of invention, technical characteristic of the invention is not limited thereto, any correlation
Within the field of the present invention, made changes or modifications all cover within the protection scope of the present invention the technical staff in field.
Claims (9)
1. the reservoir seepage-proofing structure of a kind of rock-fill dams dam facing and earth and stone material backfill bottom storehouse, Reservoir basin use rock-fill dams water blocking, soil
Rock ballast material fills bottom storehouse;It is characterized by:
The upstream slope surface of the rock-fill dams uses asphalt concrete anti-seepage panel antiseepage, and asphalt concrete anti-seepage panel uses skeleton symbol
Section;
The bottom storehouse uses impermeable composite geomembrane, uses sandbag apply pressure on composite geo-membrane;
Connection uses water-impervious post-cast strip between the asphalt concrete anti-seepage panel and bottom storehouse geomembrane;
Copper sheet sealing is set between the rock-fill dams asphalt concrete anti-seepage panel and post-cast strip;
The bottom storehouse antiseepage composite geo-membrane and post-cast strip overlap joint are bonded using spreading type polyureas.
2. the reservoir seepage-proofing structure of a kind of rock-fill dams dam facing as described in claim 1 and earth and stone material backfill bottom storehouse, feature exist
In: asphalt concrete anti-seepage panel uses skeleton symbol section.
3. the reservoir seepage-proofing structure of a kind of rock-fill dams dam facing as described in claim 1 and earth and stone material backfill bottom storehouse, feature exist
In: the water-impervious post-cast strip uses modified asphalt concrete post-cast strip.
4. the reservoir seepage-proofing structure of a kind of rock-fill dams dam facing as described in claim 1 and earth and stone material backfill bottom storehouse, feature exist
In: rough specification is added using single side with overlapped for water-impervious post-cast strip composite geo-membrane, with reinforced cementitious intensity.
5. the reservoir seepage-proofing structure of a kind of rock-fill dams dam facing according to claim 1 and earth and stone material backfill bottom storehouse, feature
Be: asphalt concrete anti-seepage panel next coming in order are bed course, transition zone and dam body stockpile.
6. the reservoir seepage-proofing structure of a kind of rock-fill dams dam facing according to claim 1 and earth and stone material backfill bottom storehouse, feature
Be: composite geo-membrane next coming in order are geotechnological straw mats, bed course, transition zone and native stone backfill are expected.
7. the reservoir seepage-proofing structure of a kind of rock-fill dams dam facing according to claim 1 and earth and stone material backfill bottom storehouse, feature
It is: is connected between rock-fill dams base of dam and bottom storehouse backfill material using arc transition section, arc transition section radius of curvature is not less than
30m。
8. the reservoir seepage-proofing structure of a kind of rock-fill dams dam facing according to claim 1 and earth and stone material backfill bottom storehouse, feature
Be: water-impervious post-cast strip width 3m~5m rolls making along base of dam is elongated, does not set seam.
9. the construction method of the reservoir seepage-proofing structure of rock-fill dams dam facing described in claim 1 and earth and stone material backfill bottom storehouse, special
Sign is the synchronous laying rolling and placement of key dam enrockment in the rock, transition zone, bed course, CFRD Embankment standard
It is controlled by porosity, key dam enrockment is typically no less than 22%, and transition zone is not less than 20%, and bed course is not less than 19%;
While with rock laying rolling and placement, the backfill of Reservoir basin is carried out, successively carries out bottom storehouse soil from bottom to top
Building stones, transition zone, bed course, geotechnological straw mats, composite geo-membrane and the construction of sandbag making;The backfill of bottom storehouse earth and stone material requires to use 22 tons
The above vibrating roller is controlled by number of rolling, and no less than 6 times, transition zone and bed course fill standard and control by porosity, are not less than
22%;
After completing rock and Reservoir basin library filling construction, rock-fill dams asphalt concrete anti-seepage panel making and bottom are carried out
Portion's copper sheet sealing is laid;
It is modified bituminous concrete post-cast strip later to pour, post-cast strip is rolled using elongated making, does not set seam;
After post-cast strip modified asphalt concrete is cooled to room temperature 40 DEG C or less, with bottom storehouse antiseepage composite geo-membrane overlapping part surface
Brushing spreading type polyureas, and overlapping part geomembrane bonding is carried out, bonded part geomembrane adds rough specification, overlap joint length using single side
Degree is not less than 1m.
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CN201910520431.3A CN110374060A (en) | 2019-06-17 | 2019-06-17 | 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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CN201910520431.3A CN110374060A (en) | 2019-06-17 | 2019-06-17 | 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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Cited By (3)
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CN114427214A (en) * | 2022-03-07 | 2022-05-03 | 中冶长天国际工程有限责任公司 | Dam foundation reservoir bottom seepage-proofing paving structure and building method thereof |
CN114960553A (en) * | 2022-05-23 | 2022-08-30 | 中国水利水电科学研究院 | Hydraulic asphalt concrete panel anti-seepage anti-abrasion protection structure and construction method |
CN115404820A (en) * | 2022-09-05 | 2022-11-29 | 中国电建集团华东勘测设计研究院有限公司 | Asphalt concrete panel rock-fill dam arrangement structure and construction method |
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CN208762966U (en) * | 2018-07-25 | 2019-04-19 | 中国电建集团华东勘测设计研究院有限公司 | The connected structure of asphalt concrete face slab and geomembrane |
CN210636386U (en) * | 2019-06-17 | 2020-05-29 | 中国电建集团华东勘测设计研究院有限公司 | Reservoir seepage prevention structure for dam face of rock-fill dam and backfill reservoir bottom of soil and stone materials |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN114427214A (en) * | 2022-03-07 | 2022-05-03 | 中冶长天国际工程有限责任公司 | Dam foundation reservoir bottom seepage-proofing paving structure and building method thereof |
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CN114960553A (en) * | 2022-05-23 | 2022-08-30 | 中国水利水电科学研究院 | Hydraulic asphalt concrete panel anti-seepage anti-abrasion protection structure and construction method |
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CN115404820A (en) * | 2022-09-05 | 2022-11-29 | 中国电建集团华东勘测设计研究院有限公司 | Asphalt concrete panel rock-fill dam arrangement structure and construction method |
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