CN110042800A - Concrete face rockfill dam leakage preventing structure - Google Patents
Concrete face rockfill dam leakage preventing structure Download PDFInfo
- Publication number
- CN110042800A CN110042800A CN201910440994.1A CN201910440994A CN110042800A CN 110042800 A CN110042800 A CN 110042800A CN 201910440994 A CN201910440994 A CN 201910440994A CN 110042800 A CN110042800 A CN 110042800A
- Authority
- CN
- China
- Prior art keywords
- concrete
- geomembrane
- strength
- leakage preventing
- preventing structure
- Prior art date
- 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.)
- Pending
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- 239000000463 material Substances 0.000 claims abstract description 17
- 239000011435 rock Substances 0.000 claims abstract description 10
- 230000007704 transition Effects 0.000 claims abstract description 7
- 239000011440 grout Substances 0.000 claims abstract description 6
- -1 polyethylene Polymers 0.000 claims abstract description 5
- 239000004698 Polyethylene Substances 0.000 claims abstract description 4
- 229920000573 polyethylene Polymers 0.000 claims abstract description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 25
- 230000001681 protective effect Effects 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000002689 soil Substances 0.000 claims description 5
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 16
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000003319 supportive effect Effects 0.000 description 1
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 invention discloses a kind of concrete face rockfill dam antiseepage patterns, including high-strength geomembrane, concrete slab, grout curtain, rock ballast lid weight, Transition Materials, bed course area, main rockfill area, secondary rockfill area etc., conventional concrete panel top half is changed to the pattern of high-strength polyethylene film for earthwork, plays the role of antiseepage using the impermeability of geomembrane.Secondary rockfill area uses the biggish rockfill materials of deformation modulus, and geomembrane is adapted to the deformation of secondary rockfill area thereafter.This dam body pattern is simple, speed of application is very fast, lower to the building stones requirement of secondary rockfill area, easy for construction.
Description
Technical field
The present invention relates to concrete face rockfill dam, especially a kind of concrete face rockfill dam leakage preventing structure.
Background technique
Concrete face rockfill dam is a kind of common local material dam pattern.It is filled by stockpile layered rolling
Dam body plays a supportive role, and armored concrete panel is arranged at its upstream as impervious body.
Typical concrete face rockfill dam is by upstream head weight body, panel, bed course area, transition region, main rockfill area, secondary enrockment
The part such as area, downstream protection slope forms.Concrete face rockfill dam is excellent since its safety is good, adaptable, speed of application is fast etc.
Point is become a kind of competitive dam type by the favor and attention of Ba Gongjie.
In the design and construction of concrete face rockfill dam, control deformation and crack are always that the core of engineering concern is asked
Topic.The crack of concrete slab is broadly divided into two class of structural crack and non-structural crack.Structural crack is mainly in water
Under load action, Rockfill Dam generates differential settlement deformation and displacement causes caused by panel and dam body come to nothing.Non- knot
Structure crack is mainly concrete slab due to by complex boundary constraint condition, temperature, humidity environment variation, concrete surface board foot
The influence of the factors such as very little, is easy to appear contraction fissure caused by non-loading cracks.The appearance of panel crack not only reduces its use
Function, and the structure durability of dam body itself is influenced very big.For control critical eigenvalue, before panel concrete construction, dam body
The pre- subsidence stage of general setting 4~6 months, influences the construction period to a certain extent.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of concrete face rockfill dam leakage preventing structures, by concrete
Panel height reduces, and difficulty of construction reduces, and panel is located under water, and construction quality is guaranteed.On top using high-strength soil
Work film replaces concrete slab antiseepage, can well adapt to the deformation of secondary rockfill area thereafter, effective to reduce top water pressure,
Increase safety of dam body.
To solve the above-mentioned problems, the technical scheme adopted by the invention is that: a kind of concrete face rockfill dam antiseepage knot
Structure, including concrete toe board, upstream rock ballast lid weight, upstream apron, downstream rock ballast lid weight, grout curtain, upstream bulwark, downstream
Barricade, in upstream dam facing, using successively by Transition Materials, bed course area, concrete surface within the scope of from dam bottom to 1/2~2/3 times of height of dam
Plate constitutes traditional concrete slab；Traditional concrete slab with up to dam crest use high-strength geomembrane anti-seepage pattern,
Concrete protective plate is arranged in high-strength geomembrane top, and geomembrane bed course is arranged in lower part, and high-strength geomembrane lower end extends
Concrete surface intralamellar part and fixation to lower part, high-strength geomembrane upper end extend to inside the bulwark of upstream side and fixed.
Traditional concrete slab be located at ordinary water level hereinafter, its material be armored concrete, strength grade >=
C30, seepage-resistant grade >=W8.
The material of the high-strength geomembrane is high-intensitive reinforcement polyethylene film for earthwork, geomembrane nominal thickness >=
3.0mm, density >=0.94g/cm3, vertically and horizontally tensile yield strength >=40N/mm, vertically and horizontally tensile break strength >=60N/mm,
Vertically and horizontally yield elongation rate >=11%, vertically and horizontally elongation at break >=600%, vertically and horizontally right-angle tearing load >=340N, anti-thorn
Wear intensity >=720N, water vapor permeation coefficient≤1 × 10-13cm/s。
Built-in length >=0.5m of concrete surface intralamellar part is protruded into high-strength geomembrane lower end.
Built-in length >=0.5m inside the bulwark of upstream is protruded into high-strength geomembrane upper end.
Plate thickness >=0.2m of the concrete protective plate.
The geomembrane bed course has continuous grading, 80~100mm of maximum particle diameter, cushion thickness >=0.3m.
The concrete protective plate be armored concrete, concrete be normal silicate low-heat cement, concrete strength >=
C25, plate thickness >=0.2m.
Corresponding behind traditional concrete slab is main rockfill area, right behind high-strength geomembrane anti-seepage pattern
What is answered is time rockfill area.
Beneficial effects of the present invention: geomembrane has good ductility, and adaptive deformation ability is strong, can well adapt to secondary
The deformation of rockfill area, and the dam type subregion is simple, speed of application is fast, needless to say dam body settlement completion can carry out geomembrane anti-seepage
Construction.It can accelerate construction progress, shorten the period, engineering is made to play benefit in advance.
Detailed description of the invention
Fig. 1 is concrete face rockfill dam leakage preventing structure typical section figure of the invention.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and detailed description:
As shown in Figure 1, concrete face rockfill dam leakage preventing structure of the invention, including concrete toe board 1, upstream rock ballast lid
Weigh 10, upstream apron 11, downstream rock ballast lid weighs 12, grout curtain 13, upstream bulwark 14, downstream barricade 15, which is characterized in that
In upstream dam facing, using successively by Transition Materials 6, bed course area 5, concrete slab 2 within the scope of from dam bottom to 1/2~2/3 times of height of dam
Constitute traditional concrete slab；Traditional concrete slab is high to use high-strength geomembrane anti-seepage pattern up to dam crest
Concrete protective plate 7 is arranged in strong 8 top of reinforced earth film, and geomembrane bed course 9 is arranged in lower part, and 8 lower end of high-strength geomembrane is prolonged
It extends to 2 inside of concrete slab of lower part and fixes, 8 upper end of high-strength geomembrane extends to 14 inside of upstream side bulwark simultaneously
It is fixed.
Traditional concrete slab 2 be located at ordinary water level hereinafter, its material be armored concrete, strength grade >=
C30, seepage-resistant grade >=W8.
The material of the high-strength geomembrane 8 is high-intensitive reinforcement polyethylene film for earthwork, geomembrane nominal thickness >=
3.0mm, density >=0.94g/cm3, vertically and horizontally tensile yield strength >=40N/mm, vertically and horizontally tensile break strength >=60N/mm,
Vertically and horizontally yield elongation rate >=11%, vertically and horizontally elongation at break >=600%, vertically and horizontally right-angle tearing load >=340N, anti-thorn
Wear intensity >=720N, water vapor permeation coefficient≤1 × 10-13cm/s。
Built-in length >=0.5m inside concrete slab 2 is protruded into 8 lower end of high-strength geomembrane.
Built-in length >=0.5m inside upstream bulwark 14 is protruded into 8 upper end of high-strength geomembrane.
Plate thickness >=0.2m of the concrete protective plate 7.
The geomembrane bed course 9 has continuous grading, 80~100mm of maximum particle diameter, cushion thickness >=0.3m.
The concrete protective plate 7 be armored concrete, concrete be normal silicate low-heat cement, concrete strength >=
C25, plate thickness >=0.2m.
Corresponding behind traditional concrete slab is main rockfill area 3, behind high-strength geomembrane anti-seepage pattern
Corresponding is time rockfill area 4.
Specifically, concrete toe board 1 and 2 tail portion of concrete slab setting upstream rock ballast lid weigh 10 and upstream apron 11,
Grout curtain 13 is arranged in toe board bottom.
Concrete slab height is reduced to the 1/2~2/3 of height of dam, is replaced at an upper portion thereof with high-strength geomembrane, soil
Work film surface be arranged concrete slab carry out slope protection, play prevent geomembrane to be punctured, be anti-sun, age inhibiting effect, soil
Work film rear portion uses thin layer bedding material.Geomembrane lower end is protruded into concrete slab, and built-in length >=0.5m, upstream is protruded into upper end
It is inside the bulwark of side and fixed, built-in length >=0.5m.In toe board bottom, grout curtain is set.Geomembrane, panel, toe board, curtain
Curtain grouting collectively constitutes the seepage prevention system of entire concrete face rockfill dam.Bed course area, transition are set gradually after concrete slab
Area and main rockfill area, main rockfill area use the preferable grit material of gradation.Bed course area, secondary rockfill area are set gradually after geomembrane, it is secondary
Rockfill area uses slightly soft dam material.
Be specifically described below, in the present embodiment, after the completion of dam foundation excavation, carry out first main 3 dam embankment of rockfill area,
The construction of concrete slab 2, bed course area 5, Transition Materials 6 and concrete toe board 1, form of construction work and requirement and conventional concrete panel
Rock-fill dam construction mode is identical.When within the scope of construction of concrete face slab to top 1m, start to carry out high-strength geomembrane 8
Construction guarantees that high-strength geomembrane 8 protrudes into concrete slab length not less than 0.5m, then begins to carry out time rockfill area 4 to apply
The softer material that fills can be used in work, secondary rockfill area 4, and the sedimentation completely of main rockfill area 3 need not be waited to complete (to generally require 4~6
Month) time rockfill area 4 can be carried out fill.Then it is sequentially completed time rockfill area 4, geomembrane bed course 9, high-strength geomembrane 8, soil
The construction of bulwark 15,14 at the top of work film concrete protective plate 7 and dam body, when construction, need to guarantee that high-strength geomembrane 8 is stretched
Enter length >=0.5m in bulwark, thickness >=0.2m of concrete protective plate 7, geomembrane bed course thickness >=0.3m, in axis of dam side
To if desired muti-piece geomembrane, using overlapping mode, the lap of splice >=1m.Finally, upstream is respectively set in dam body upstream slope foot
Bedding 11 and upstream rock ballast lid weigh 10, and in downstream, slope foot setting downstream rock ballast lid weighs 12, and entire construction is completed.
Above-mentioned example is merely to illustrate technical idea and feature of the invention, and its object is to make technology in the art
Personnel only cannot limit the scope of the patents of the invention with this example it will be appreciated that the contents of the present invention and implement accordingly, i.e., all
Same changes or modifications made by disclosed spirit, still fall in the scope of the patents of the invention.
Claims (9)
1. a kind of concrete face rockfill dam leakage preventing structure, including concrete toe board (1), upstream rock ballast lid weight (10), upstream paving
Cover (11), downstream rock ballast lid weight (12), grout curtain (13), upstream bulwark (14), downstream barricade (15), which is characterized in that
In upstream dam facing, using successively by Transition Materials (6), bed course area (5), concrete surface within the scope of from dam bottom to 1/2~2/3 times of height of dam
Plate (2) constitutes traditional concrete slab；Traditional concrete slab is to use high-strength geomembrane anti-seepage type up to dam crest
Concrete protective plate (7) are arranged in formula, high-strength geomembrane (8) top, and geomembrane bed course (9) are arranged in lower part, high-strength soil
The concrete slab (2) that work film (8) lower end extends to lower part is internal and fixed, and high-strength geomembrane (8) upper end extends to
It is internal and fixed to swim side bulwark (14).
2. concrete face rockfill dam leakage preventing structure according to claim 1, which is characterized in that traditional concrete surface
Plate (2) is located at ordinary water level hereinafter, its material is armored concrete, strength grade >=C30, seepage-resistant grade >=W8.
3. concrete face rockfill dam leakage preventing structure according to claim 1, which is characterized in that the high-strength geomembrane
(8) material is high-intensitive reinforcement polyethylene film for earthwork, geomembrane nominal thickness >=3.0mm, density >=0.94g/cm3, in length and breadth
To tensile yield strength >=40N/mm, vertically and horizontally tensile break strength >=60N/mm, vertically and horizontally yield elongation rate >=11%, in length and breadth
To elongation at break >=600%, vertically and horizontally right-angle tearing load >=340N, anti-puncture intensity >=720N, water vapor permeation coefficient
≤1×10-13cm/s。
4. concrete face rockfill dam leakage preventing structure according to claim 1, which is characterized in that the high-strength geomembrane
(8) the internal built-in length >=0.5m of concrete slab (2) is protruded into lower end.
5. concrete face rockfill dam leakage preventing structure according to claim 1, which is characterized in that the high-strength geomembrane
(8) the internal built-in length >=0.5m of upstream bulwark (14) is protruded into upper end.
6. concrete face rockfill dam leakage preventing structure according to claim 1, which is characterized in that the concrete protective plate
(7) plate thickness >=0.2m.
7. concrete face rockfill dam leakage preventing structure according to claim 1, which is characterized in that the geomembrane bed course (9)
With continuous grading, 80~100mm of maximum particle diameter, cushion thickness >=0.3m.
8. concrete face rockfill dam leakage preventing structure according to claim 1, which is characterized in that the concrete protective plate
It (7) is armored concrete, concrete is normal silicate low-heat cement, concrete strength >=C25, plate thickness >=0.2m.
9. any one of -8 concrete face rockfill dam leakage preventing structure according to claim 1, which is characterized in that described traditional
Corresponding behind concrete slab is main rockfill area (3), and corresponding behind high-strength geomembrane anti-seepage pattern is time rockfill area
(4)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910440994.1A CN110042800A (en) | 2019-05-24 | 2019-05-24 | Concrete face rockfill dam leakage preventing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910440994.1A CN110042800A (en) | 2019-05-24 | 2019-05-24 | Concrete face rockfill dam leakage preventing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110042800A true CN110042800A (en) | 2019-07-23 |
Family
ID=67283529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910440994.1A Pending CN110042800A (en) | 2019-05-24 | 2019-05-24 | Concrete face rockfill dam leakage preventing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110042800A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110499743A (en) * | 2019-07-29 | 2019-11-26 | 中电建十一局工程有限公司 | A kind of overlay film cemented gravel dam and its method of construction |
| CN111395267A (en) * | 2020-04-24 | 2020-07-10 | 中水北方勘测设计研究有限责任公司 | Core wall rock-fill dam |
| CN113006006A (en) * | 2021-03-11 | 2021-06-22 | 中国水电基础局有限公司 | Novel panel structure of panel rock-fill dam and construction method thereof |
| CN114561914A (en) * | 2022-03-04 | 2022-05-31 | 中国电建集团西北勘测设计研究院有限公司 | Drainage structure in concrete panel rock-fill dam cushion zone in cold region |
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| US6612779B1 (en) * | 1998-12-10 | 2003-09-02 | Capri Tech Italia S.R.L. | Embankment dam and waterproofing method |
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| CN108005031A (en) * | 2017-12-31 | 2018-05-08 | 华北水利水电大学 | Based on LINE-X flexible panel rock-fill dams |
| CN210395248U (en) * | 2019-05-24 | 2020-04-24 | 中水北方勘测设计研究有限责任公司 | Concrete face rockfill dam seepage prevention structure |
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2019
- 2019-05-24 CN CN201910440994.1A patent/CN110042800A/en active Pending
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| US6612779B1 (en) * | 1998-12-10 | 2003-09-02 | Capri Tech Italia S.R.L. | Embankment dam and waterproofing method |
| CN103643656A (en) * | 2013-11-22 | 2014-03-19 | 河海大学 | High rock-fill dam membrane anti-seepage body on deep coverage layer and construction method of high rock-fill dam membrane anti-seepage body |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110499743A (en) * | 2019-07-29 | 2019-11-26 | 中电建十一局工程有限公司 | A kind of overlay film cemented gravel dam and its method of construction |
| CN111395267A (en) * | 2020-04-24 | 2020-07-10 | 中水北方勘测设计研究有限责任公司 | Core wall rock-fill dam |
| CN113006006A (en) * | 2021-03-11 | 2021-06-22 | 中国水电基础局有限公司 | Novel panel structure of panel rock-fill dam and construction method thereof |
| CN114561914A (en) * | 2022-03-04 | 2022-05-31 | 中国电建集团西北勘测设计研究院有限公司 | Drainage structure in concrete panel rock-fill dam cushion zone in cold region |
| CN114561914B (en) * | 2022-03-04 | 2024-01-19 | 中国电建集团西北勘测设计研究院有限公司 | Drainage structure for bedding layer area of concrete face rockfill dam in cold area |
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