CN113802523A - Anti-seepage earth dam heightening construction process - Google Patents
Anti-seepage earth dam heightening construction process Download PDFInfo
- Publication number
- CN113802523A CN113802523A CN202010547893.7A CN202010547893A CN113802523A CN 113802523 A CN113802523 A CN 113802523A CN 202010547893 A CN202010547893 A CN 202010547893A CN 113802523 A CN113802523 A CN 113802523A
- Authority
- CN
- China
- Prior art keywords
- dam
- heightening
- construction process
- earth dam
- impervious
- 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
Links
Images
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
- 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
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/122—Flexible prefabricated covering elements, e.g. mats, strips
- E02B3/126—Flexible prefabricated covering elements, e.g. mats, strips mainly consisting of bituminous material or synthetic resins
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Revetment (AREA)
Abstract
The invention relates to a heightening construction process of an impervious earth dam, which provides a plurality of geomembranes, wherein the upper side and the lower side of each geomembrane are respectively covered with a piece of geotextile to form an impervious net, a plurality of connecting holes are dug at the top of the original earth dam, one end of the impervious net is firstly placed in the connecting holes, a proper amount of modified concrete is poured into the connecting holes for fixing, then common concrete is poured at the top of the original earth dam to obtain the heightening dam, finally, the other end of the impervious net is fixed at the top of the heightening dam, and the impervious net is spread and covered at the upstream side of the heightening dam. By adopting the technical scheme of the invention, the anti-seepage effect is improved, the geomembrane is prevented from being invaded by sunshine or rainstorm, the service life of the geomembrane is prolonged, the anti-seepage net is fixed by pouring modified concrete, so that the thermal deformation of the joint of the core part of the original earth dam and the core part of the heightening dam is kept consistent, the service life of a new earth dam is prolonged, and the geomembrane is anchored by using the anchor rod, so that the anti-seepage effect is further improved.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a heightening construction process for an impervious earth dam.
Background
At present, various new materials and technologies are continuously applied to the construction process of water conservancy facilities, and since the 20 th century, various novel synthetic fiber materials such as polyvinyl chloride, polyvinyl alcohol, polyamide, polyester, polyethylene, polypropylene and the like are successively developed, and the synthetic materials have the characteristics of high strength, good elasticity, corrosion resistance, no mildew, moth-eating resistance and the like, have the advantages of stable construction quality control, simple and convenient construction process operation, fast construction progress, low construction cost and the like when used in engineering construction, and are widely applied to impermeable engineering of rock and water conservancy and the like. In water conservancy projects, when an original earth dam needs to be heightened, the PVC geomembrane (5) is often used for carrying out seepage-proofing treatment on a newly-added dam body, however, in the actual construction process, the newly-heightened dam body is often in the environment of sunshine insolation or rainstorm invasion due to the relatively high height of the newly-heightened dam body, and the PVC geomembrane (5) is easily damaged after the insolation or rainstorm invasion, so that the seepage-proofing effect of the newly-added dam body is influenced.
Disclosure of Invention
In order to solve the technical problem, the invention provides a construction process for heightening an impervious earth dam.
The invention provides a heightening construction process for an impervious earth dam, which comprises the following steps:
providing a plurality of geomembranes, covering the upper side and the lower side of each geomembrane with a piece of geotextile respectively to form anti-seepage nets, excavating a plurality of connecting holes on the top of the original earth dam, firstly placing one end of each anti-seepage net in each connecting hole, pouring a proper amount of modified concrete into each connecting hole for fixing, then pouring common concrete on the top of the original earth dam to obtain a heightening dam, finally fixing the other end of each anti-seepage net on the top of the heightening dam, and paving and covering the anti-seepage nets on the upstream side of the heightening dam.
The geomembrane is made of PVC.
The modified concrete is prepared by uniformly mixing crushed stone with the particle size of 5-10 mm, sand with the particle size of less than 5mm, bentonite, cement and water according to the water-cement ratio of 1.95.
The heightening construction process of the impervious earth dam further comprises the following steps:
after the anti-seepage net is paved and covered on one side of the upstream of the heightening dam, an anchor rod is provided, one end of the anchor rod penetrates through the geomembrane and extends into the heightening dam, a sealing gasket, a pressing strip, a gasket and a locking nut are sequentially sleeved on the other end of the anchor rod, and the gasket, the pressing strip, the sealing gasket and the geomembrane are sequentially pressed and attached to one side of the upstream of the heightening dam by screwing the locking nut.
The anti-seepage dam heightening construction process further comprises the step of smearing a proper amount of adhesive on the peripheral surface of the anchor rod before one end of the anchor rod penetrates through the geomembrane and extends into the heightening dam.
The stock quantity is many, and two adjacent stock intervals are not more than 25 cm.
The sealing gasket is made of rubber.
The anchor rod extends into the heightening dam by at least 20 mm.
The depth of the connecting hole is not less than 2m, and the depth of the anti-seepage net extending into the connecting hole is not less than 2 m.
The heightening construction process of the impervious earth dam further comprises the following steps:
obtaining prevention of seepage curtain grouting platform, spillway through pouring ordinary concrete respectively about former embankment, when making prevention of seepage net pave cover in increase dam upstream one side after, still the prevention of seepage curtain grouting platform or the spillway of both sides about former embankment pass through respectively prevention of seepage net links together.
The invention has the beneficial effects that: by adopting the technical scheme of the invention, the geotextile is used for covering the geomembrane to form the anti-seepage net, so that the anti-seepage effect is improved on one hand, on the other hand, the geomembrane is prevented from being subjected to sunshine exposure or rainstorm invasion, and the service life of the geomembrane is prolonged.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the construction of the barrier web of the present invention;
fig. 3 is a schematic view showing the structure of the anchoring part of the impermeable net of the present invention.
In the figure: 1-impermeable net, 2-modified concrete, 3-heightening dam, 4-original earth dam, 5-geomembrane, 6-geotextile, 7-anchor rod, 8-sealing gasket, 9-batten, 10-gasket and 11-adhesive.
Detailed Description
The technical solution of the present invention is further explained with reference to the accompanying drawings, but the claimed protection scope is not limited thereto;
the invention provides a heightening construction process of an impervious earth dam, which comprises the following steps as shown in figures 1, 2 and 3:
providing a plurality of geomembranes 5, covering a piece of geotextile 6 on the upper side and the lower side of each geomembrane 5 respectively to form an anti-seepage net 1, excavating a plurality of connecting holes on the top of an original earth dam 4, firstly placing one end of the anti-seepage net 1 in the connecting holes, pouring a proper amount of modified concrete 2 into the connecting holes for fixing, then pouring common concrete on the top of the original earth dam 4 to obtain a heightening dam 3, finally fixing the other end of the anti-seepage net 1 on the top of the heightening dam 3, and paving the anti-seepage net 1 on one side of the upstream of the heightening dam 3.
Further, the material of the geomembrane 5 is preferably PVC. The modified concrete 2 is prepared by uniformly mixing crushed stone with the particle size of 5-10 mm, sand with the particle size of less than 5mm, bentonite, cement and water according to the water-cement ratio of 1.95.
In addition, the anti-seepage dam heightening construction process also comprises the following steps:
after the anti-seepage net 1 is paved and covered on one side of the upstream of the heightening dam 3, an anchor rod 7 is provided, one end of the anchor rod 7 penetrates through the geomembrane 5 and extends into the heightening dam 3, a sealing gasket 8, a pressing strip 9, a gasket 10 and a locking nut are sequentially sleeved on the other end of the anchor rod 7, and the gasket 10, the pressing strip 9, the sealing gasket 8 and the geomembrane 5 are sequentially pressed and attached to one side of the upstream of the heightening dam 3 by screwing the locking nut.
Further, the construction process for raising the impervious dam further comprises the step of coating a proper amount of adhesive 11 on the outer peripheral surface of the anchor rod 7 before one end of the anchor rod 7 penetrates through the geomembrane 5 and extends into the raised dam 3. Geomembrane 5 is bonded to the upstream side of the booster dam 3 by adhesive 11. Preferably, the bead 9 is an elongated angle steel. The anchor rods 7 are multiple in number, and the distance between every two adjacent anchor rods 7 is not more than 25 cm. The material of the gasket 8 is rubber. The anchor rods 7 extend into the heightening dam 3 by at least 20 mm. The nominal diameter of the anchor rod 7 is not less than phi 12 mm. The depth of the connecting hole is not less than 2m, and the depth of the anti-seepage net 1 extending into the connecting hole is not less than 2 m. The aperture of the connecting hole is not less than 0.75 m.
In addition, the heightening construction process of the impervious earth dam further comprises the following steps:
and (3) respectively pouring common concrete on the left and right banks of the original earth dam 4 to obtain an anti-seepage curtain grouting platform and a spillway, and after the anti-seepage net 1 is paved and covered on the upstream side of the heightening dam 3, respectively connecting the anti-seepage curtain grouting platform or the spillway on the left and right banks of the original earth dam 4 together through the anti-seepage net 1.
By adopting the technical scheme of the invention, the geotextile is used for covering the geomembrane to form the anti-seepage net, so that the anti-seepage effect is improved on one hand, on the other hand, the geomembrane is prevented from being subjected to sunshine exposure or rainstorm invasion, and the service life of the geomembrane is prolonged.
Claims (10)
1. The heightening construction process of the impervious earth dam is characterized by comprising the following steps of: the method comprises the following steps:
providing a plurality of geomembranes (5), covering a piece of geotextile (6) on the upper side and the lower side of each geomembrane (5) respectively to form an anti-seepage net (1), excavating a plurality of connecting holes on the top of an original earth dam (4), firstly placing one end of the anti-seepage net (1) in the connecting holes, pouring a proper amount of modified concrete (2) into the connecting holes for fixing, then pouring common concrete on the top of the original earth dam (4) to obtain a heightening dam (3), and finally fixing the other end of the anti-seepage net (1) on the top of the heightening dam (3), and paving and covering the anti-seepage net (1) on the upstream side of the heightening dam (3).
2. The heightening construction process of the impervious earth dam as recited in claim 1, characterized in that: the geomembrane (5) is made of PVC.
3. The heightening construction process of the impervious earth dam as recited in claim 1, characterized in that: the modified concrete (2) is prepared by uniformly mixing crushed stone with the particle size of 5-10 mm, sand with the particle size of less than 5mm, bentonite, cement and water according to the water-cement ratio of 1.95.
4. The heightening construction process of the impervious earth dam as recited in claim 1, characterized in that: the heightening construction process of the impervious earth dam further comprises the following steps:
the anti-seepage net (1) is paved and covered on one side of the upstream of the heightening dam (3), an anchor rod (7) is provided, one end of the anchor rod (7) penetrates through the geomembrane (5) and extends into the heightening dam (3), a sealing gasket (8), a pressing strip (9), a gasket (10) and a locking nut are sequentially sleeved on the other end of the anchor rod (7), and the gasket (10), the pressing strip (9), the sealing gasket (8) and the geomembrane (5) are sequentially pressed and attached to one side of the upstream of the heightening dam (3) through screwing the locking nut.
5. The heightening construction process of the impervious earth dam as recited in claim 4, characterized in that: the anti-seepage earth dam heightening construction process further comprises the step of smearing a proper amount of adhesive (11) on the peripheral surface of the anchor rod (7) before one end of the anchor rod (7) penetrates through the geomembrane (5) and extends into the heightening dam (3).
6. The heightening construction process of the impervious earth dam as recited in claim 4, characterized in that: the number of the anchor rods (7) is multiple, and the distance between every two adjacent anchor rods (7) is not more than 25 cm.
7. The heightening construction process of the impervious earth dam as recited in claim 4, characterized in that: the sealing gasket (8) is made of rubber.
8. The heightening construction process of the impervious earth dam as recited in claim 4, characterized in that: the anchor rod (7) extends into the heightening dam (3) by at least 20 mm.
9. The heightening construction process of the impervious earth dam as recited in claim 1, characterized in that: the depth of the connecting hole is not less than 2m, and the depth of the anti-seepage net (1) extending into the connecting hole is not less than 2 m.
10. The heightening construction process of the impervious earth dam as recited in claim 1, characterized in that: the heightening construction process of the impervious earth dam further comprises the following steps:
former earth dam (4) are controlled both sides and are obtained prevention of seepage curtain grouting platform, spillway through pouring ordinary concrete respectively, work as the messenger prevention of seepage net (1) pave cover in increase dam (3) upper reaches one side later, still former earth dam (4) are controlled the prevention of seepage curtain grouting platform or the spillway of both sides and are passed through respectively prevention of seepage net (1) link together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010547893.7A CN113802523A (en) | 2020-06-16 | 2020-06-16 | Anti-seepage earth dam heightening construction process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010547893.7A CN113802523A (en) | 2020-06-16 | 2020-06-16 | Anti-seepage earth dam heightening construction process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113802523A true CN113802523A (en) | 2021-12-17 |
Family
ID=78944352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010547893.7A Pending CN113802523A (en) | 2020-06-16 | 2020-06-16 | Anti-seepage earth dam heightening construction process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113802523A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1126040A (en) * | 1980-01-21 | 1982-06-22 | Charles D. Richards | Earth dam protective covering |
| US6612779B1 (en) * | 1998-12-10 | 2003-09-02 | Capri Tech Italia S.R.L. | Embankment dam and waterproofing method |
| CN201334669Y (en) * | 2008-12-11 | 2009-10-28 | 贵阳铝镁设计研究院 | Anchoring structure of tailings reservoir preliminary dam top leakproof geomembrane |
| CN102041800A (en) * | 2010-12-08 | 2011-05-04 | 四川路航建设工程有限责任公司 | Method for constructing PVC (polyvinyl chloride) composite geomembrane watertight core of earth-rockfill dam |
| CN202830882U (en) * | 2012-09-21 | 2013-03-27 | 中国水电顾问集团华东勘测设计研究院 | Geomembrane impervious structure on concrete dam upstream surface |
| CN103243681A (en) * | 2013-05-16 | 2013-08-14 | 黄河勘测规划设计有限公司 | Flexible connection method for geomembrane for earth and rockfill dam seepage proofing and concrete building |
| 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 |
| CN112813931A (en) * | 2021-02-05 | 2021-05-18 | 中国电建集团华东勘测设计研究院有限公司 | Heightening mixed dam structure combined with built earth-rock dam and construction method thereof |
-
2020
- 2020-06-16 CN CN202010547893.7A patent/CN113802523A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1126040A (en) * | 1980-01-21 | 1982-06-22 | Charles D. Richards | Earth dam protective covering |
| US6612779B1 (en) * | 1998-12-10 | 2003-09-02 | Capri Tech Italia S.R.L. | Embankment dam and waterproofing method |
| CN201334669Y (en) * | 2008-12-11 | 2009-10-28 | 贵阳铝镁设计研究院 | Anchoring structure of tailings reservoir preliminary dam top leakproof geomembrane |
| CN102041800A (en) * | 2010-12-08 | 2011-05-04 | 四川路航建设工程有限责任公司 | Method for constructing PVC (polyvinyl chloride) composite geomembrane watertight core of earth-rockfill dam |
| CN202830882U (en) * | 2012-09-21 | 2013-03-27 | 中国水电顾问集团华东勘测设计研究院 | Geomembrane impervious structure on concrete dam upstream surface |
| CN103243681A (en) * | 2013-05-16 | 2013-08-14 | 黄河勘测规划设计有限公司 | Flexible connection method for geomembrane for earth and rockfill dam seepage proofing and concrete building |
| 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 |
| CN112813931A (en) * | 2021-02-05 | 2021-05-18 | 中国电建集团华东勘测设计研究院有限公司 | Heightening mixed dam structure combined with built earth-rock dam and construction method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207793788U (en) | A kind of porous pavement rain infiltration structure | |
| CN106368238B (en) | A kind of honeycomb geotechnical grid retaining wall and its construction method with ecological recovery function | |
| CN103696397B (en) | A kind of anti-seepage processing method of artificial dam | |
| CN109881659A (en) | A kind of offshore wind farm steel pipe pile foundation foundation reinforcement method with protection against erosion ability | |
| CN113445396B (en) | High-fill road foundation filling construction method for high liquid limit soil road section | |
| CN106351239A (en) | Cement modified soil strengthened geogrid reinforced soil structure and construction method thereof | |
| CN110629770B (en) | Reservoir side slope hydro-fluctuation belt seepage-proofing slope protection structure and construction method thereof | |
| CN111648348A (en) | Method for processing high-rise building foundation in non-self-weight collapsible loess area | |
| CN107419628A (en) | A kind of construction method of the rapid build road on reclaimed ground | |
| CN201495524U (en) | Geogrid slope protection structure of expansive soil channel | |
| US11045847B2 (en) | Geocomposite covering | |
| CN108914959B (en) | Foundation structure suitable for mountain house building and construction method thereof | |
| CN113802523A (en) | Anti-seepage earth dam heightening construction process | |
| CN113982001B (en) | Construction method of flexible framework slope protection structure | |
| CN207793792U (en) | A kind of road surface permeable pavement structure | |
| JP2000178980A (en) | Impervious protection method for face of slope | |
| CN212294202U (en) | Expansive soil field terrace embankment filling structure | |
| CN204059287U (en) | A kind of earth and rockfill dam leakage preventing structure | |
| CN210031693U (en) | Trinity original ecology prevention of seepage system | |
| CN112359850A (en) | Masonry protection structure of road engineering and construction method thereof | |
| KR20110028801A (en) | Planting consturuction using the straight bamboo | |
| CN111663390A (en) | Expansive soil terrace embankment filling structure and construction method | |
| CN205421157U (en) | Reinforced earth quaywall structure based on soft base of mud flat | |
| CN220166953U (en) | Ecological toughness lattice anchoring structure for protecting expansive soil slope | |
| CN213836760U (en) | Anti-seepage treatment structure for engineering dam foundation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211217 |