CN102660936A - Method for realizing seepage prevention of bridge wall by means of polyvinyl chloride film - Google Patents

Method for realizing seepage prevention of bridge wall by means of polyvinyl chloride film Download PDF

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Publication number
CN102660936A
CN102660936A CN2012101708507A CN201210170850A CN102660936A CN 102660936 A CN102660936 A CN 102660936A CN 2012101708507 A CN2012101708507 A CN 2012101708507A CN 201210170850 A CN201210170850 A CN 201210170850A CN 102660936 A CN102660936 A CN 102660936A
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CN
China
Prior art keywords
wall
polychloroethylene film
polyvinyl chloride
chloride film
dam
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Pending
Application number
CN2012101708507A
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Chinese (zh)
Inventor
李新才
涂志军
叶剑
阮应宾
李�浩
刘浩
庞崇林
孔伟
王江卫
林赛菁
邵艳青
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Sinohydro Bureau 14 Co Ltd
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Sinohydro Bureau 14 Co Ltd
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Publication date
Application filed by Sinohydro Bureau 14 Co Ltd filed Critical Sinohydro Bureau 14 Co Ltd
Priority to CN2012101708507A priority Critical patent/CN102660936A/en
Publication of CN102660936A publication Critical patent/CN102660936A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a method for realizing seepage prevention of a bridge wall by means of a polyvinyl chloride film. The polyvinyl chloride film is arranged at the center of a bridge core wall, a sand mat layer is arranged at the bottom of the bridge wall, a polyvinyl chloride film seepage prevention wall is arranged in the middle of the bridge wall, transition material layers are arranged on two sides of the polyvinyl chloride film seepage prevention wall, a dam shell is arranged outside the transition material layers, a dry stone pitching is arranged on the surface of the dam shell, and the polyvinyl chloride film in the polyvinyl chloride film seepage prevention wall vertically ascends in a zigzag folded manner. A core wall type rockfill dam is effectively built in a place without proper impervious soil, the problem of settlement deformation of the core wall type rockfill dam built on a soft soil foundation is solved, cost is saved, construction period is shortened, and fine social and economic benefits are achieved. Combined positions of the polyvinyl chloride film and the top of the seepage prevention wall and two bank slopes are feeble in seepage prevention, the polyvinyl chloride film is fixed through a pressing plate by the aid of a concave groove, concrete is backfilled, and the seepage prevention effect of the combined positions is improved.

Description

A kind of method of carrying out the bridge wall antiseepage with polychloroethylene film
Technical field
The invention belongs to water conservancy and hydropower civil works technical field, be specifically related to a kind of method that places the antiseepage of dam core-wall central authorities with polychloroethylene film.
Background technology
Loose rock dam are a kind of comparatively ancient and ripe dam types, adopt the anti-pattern that blends the antiseepage of clay core-wall of upstream face concrete slab more.Along with the fast development of geosynthetics technology, polychloroethylene film obtains paying attention in engineering circle because of having the superior anti-performance that blends good adaptation distortion, especially in hydraulic engineering.In decades, the new dam of polychloroethylene film in Tu Shidiba (comprising dyke, earth dam, sandy gravel dam, loose rock dam, stone masonry dam etc.) engineering be anti-to blend aspect such as old dam seepage reinforcing and has obtained many application at home and abroad, but basically all is used in dam face seepage.The present invention is specifically related to a kind ofly place the method for core-wall central authorities antiseepage with polychloroethylene film, is different from the scheme that Other Engineering adopts, and does not also see relevant report in the loose rock dam document of the same type at home.
Summary of the invention
The purpose of this invention is to provide a kind of method of carrying out the bridge wall antiseepage, can practice thrift cost, shorten the construction period, produce good social and economic benefit with polychloroethylene film.
Technical scheme of the present invention is: adopt polychloroethylene film, place dam core-wall central authorities to carry out antiseepage, it constitutes: be sand cushion at the bottom of the dam; The centre is the polychloroethylene film impervious wall; Two of polychloroethylene film impervious walls are the transition bed of material, and the transition bed of material is outward a dam shell, and the dam shell surface is a dry stone pitching.
The job practices of polychloroethylene film impervious wall is following:
1) the polychloroethylene film impervious wall the top of a wall is handled: build up the character cut in bas-relief groove with concrete casting, the center is provided with a pre-embedded bolt in the middle of the character cut in bas-relief groove, and bolt gos deep into concrete and exposes 10cm, and exposed parts is a screw thread; Pressing plate with polychloroethylene film is fixed on polychloroethylene film in the character cut in bas-relief groove of the top of a wall, again fill concrete;
2) two bank slope joints reason: polychloroethylene film is folding in vertical direction to rise; Every 30cm ~ 40cm carries out once folding; Lay by " it " font, usefulness and pressing plate press with wide rubber strip again, use the pressing plate compacting again; Cover with concrete backfill again, guarantee the barrier performance of the joint of polychloroethylene film and left bank side slope;
3) polychloroethylene film and wave wall bottom fitting are handled: the polychloroethylene film top embeds more than the 0.8m of concrete the inside, wave wall bottom, can guarantee that polychloroethylene film and wave wall, both sides bank slope and impervious wall form the antiseepage body of sealing.
Good effect of the present invention:
1, polychloroethylene film core-wall antiseepage body The application of new technique has improved efficiency of construction, has accelerated construction speed, practices thrift a large amount of durations.
2, adopt polychloroethylene film core-wall antiseepage body new technology, can the excavated material in stock ground in the reservoir area be made full use of in the last dam process, reduce the reservoir area and pollute.Also reduce the expropriation of land immigrant on the other hand, reduce the direct investment of engineering greatly.
3, effectively solve the problem of building core wall rockfill dam in the place that can not find box-like antiseepage earth material and reach the sedimentation and deformation problem of on soft foundation, building core wall rockfill dam.
4, polychloroethylene film places the method for core-wall central authorities antiseepage to have that cost is low, speed of application is fast, and it is little influenced by weather condition, can adapt to the characteristics of deformation of ground and differential settlement.
Description of drawings
Fig. 1 is the polychloroethylene film impervious wall dam body sectional schematic diagram that contains of the present invention.
Fig. 2 is a polychloroethylene film impervious wall impervious wall the top of a wall structural representation of the present invention.
Fig. 3 is polychloroethylene film of the present invention and bank slope joint character cut in bas-relief slot bolt arrangement sketch map.
Fig. 4 is the folding sketch map of polychloroethylene film of the present invention " it " font.
Among the figure, at the bottom of the 1-dam sand cushion, 2-dam shell, the 3-transition bed of material, 4-polychloroethylene film impervious wall, 5-stone paving, 6-bridge wall central axis, 7-enrockment rib body, the 8-polychloroethylene film impervious wall the top of a wall, 9-sand.
The specific embodiment
Method of carrying out the bridge wall antiseepage with polychloroethylene film of the present invention is to adopt polychloroethylene film; Place dam core-wall central authorities to carry out antiseepage, the constituting of antiseepage bridge wall: be sand cushion 1 at the bottom of the dam, the centre is a polychloroethylene film impervious wall 2; Two of concrete cuts are the transition bed of material 3; The transition bed of material is outward a dam shell 2, and the dam shell surface is stone paving 5, and is as shown in Figure 1.Polychloroethylene film in the polychloroethylene film impervious wall is arranged by " it " font on the vertical direction is folding and risen, and is as shown in Figure 4.
The job practices of concrete cut is following:
1) processing of the polychloroethylene film impervious wall the top of a wall 8: the top of a wall of impervious wall is the weak location of impervious wall pouring quality; Antiseepage quality in order to ensure whole dam body; Build up character cut in bas-relief groove (as shown in Figure 2) with the C20 concrete casting, at the middle center spacing 50cm of character cut in bas-relief groove a length being set is the 60cm pre-embedded bolt, and bolt gos deep into concrete 50cm; Expose 10cm, exposed parts is a screw thread; With the pressing plate (adopt the Q235 steel, thickness is 4mm, and length 30cm, width are 20cm) of polychloroethylene film, the pressing plate quantity of polychloroethylene film is identical with the pre-embedded bolt number at impervious wall top.Each pressing plate all is furnished with onesize rubber, after the nut on the bolt tightens, polychloroethylene film is fixed in the character cut in bas-relief groove of the top of a wall, and fill concrete has further improved the anti-seepage effect at impervious wall the top of a wall place again.
2) two bank slope joints reason: in order to ensure the antiseepage ability in two bank slope positions, on rock slope grouting cover plate, done a big character cut in bas-relief groove, polychloroethylene film is folding in vertical direction to rise; Every 30cm ~ 40cm carries out once folding, lays by " it " font, and usefulness and pressing plate press with wide rubber strip again; Use the pressing plate compacting again; As shown in Figure 3, then cover with the C20 concrete backfill again, guarantee the barrier performance of the joint of polychloroethylene film and left bank side slope;
3) polychloroethylene film and wave wall bottom fitting are handled: the polychloroethylene film top embeds more than the 0.8m of concrete the inside, wave wall bottom, can guarantee that polychloroethylene film and wave wall, both sides bank slope and impervious wall form the antiseepage body of sealing.
When the composite polrvinyl chloride film is laid, should form wrinkle, and keep lax shape, to adapt to distortion.Composite polrvinyl chloride film and upstream and downstream clay material, transition material, stockpile have been put down construction simultaneously, to guarantee the contact seam face grinding compacting between the various material.
All the other job practicess partly of bridge wall are undertaken by existing method.

Claims (3)

1. method of carrying out the bridge wall antiseepage with polychloroethylene film; It is characterized in that adopting polychloroethylene film, place dam core-wall central authorities to carry out antiseepage, its bridge wall constitutes: be sand cushion at the bottom of the dam; The centre is the polychloroethylene film impervious wall; Two of polychloroethylene film impervious walls are the transition bed of material, and the transition bed of material is outward a dam shell, and the dam shell surface is a dry stone pitching.
2. method of carrying out the bridge wall antiseepage with polychloroethylene film according to claim 1 is characterized in that the polychloroethylene film in the polychloroethylene film impervious wall is arranged by the folding rising of " it " font on the vertical direction.
3. method of carrying out the bridge wall antiseepage with polychloroethylene film according to claim 1 is characterized in that the job practices of polychloroethylene film impervious wall is following:
1) the polychloroethylene film impervious wall the top of a wall is handled: build up the character cut in bas-relief groove with concrete casting, the center is provided with a pre-embedded bolt in the middle of the character cut in bas-relief groove, and bolt gos deep into concrete and exposes, and exposed parts is a screw thread; Pressing plate with polychloroethylene film is fixed on polychloroethylene film in the character cut in bas-relief groove of the top of a wall, again fill concrete;
2) two bank slope joints reason: polychloroethylene film is folding in vertical direction to rise; Every 30cm ~ 40cm carries out once folding; Lay by " it " font, usefulness and pressing plate press with wide rubber strip again, use the pressing plate compacting again; Cover with concrete backfill again, guarantee the barrier performance of the joint of polychloroethylene film and left bank side slope;
3) polychloroethylene film and wave wall bottom fitting are handled: the polychloroethylene film top embeds more than the 0.8m of concrete the inside, wave wall bottom, can guarantee that polychloroethylene film and wave wall, both sides bank slope and impervious wall form the antiseepage body of sealing.
CN2012101708507A 2012-05-29 2012-05-29 Method for realizing seepage prevention of bridge wall by means of polyvinyl chloride film Pending CN102660936A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102852121A (en) * 2012-09-24 2013-01-02 长江勘测规划设计研究有限责任公司 Artificial composite foundation for building clay core rock-fill dam on deep overburden and construction method for artificial composite foundation
CN102979061A (en) * 2012-12-04 2013-03-20 合肥工业大学 Oblique membrane core wall earth and rockfill dam and anti-seepage body construction method thereof
CN103114561A (en) * 2013-01-17 2013-05-22 中国水利水电科学研究院 Method of embedding fiber optic sensor (FOS) inside clay core wall
CN103410123A (en) * 2013-08-13 2013-11-27 中国水电顾问集团成都勘测设计研究院 Retaining dam for hydraulic and hydro-power engineering
CN104153380A (en) * 2014-04-11 2014-11-19 中国水利水电第十一工程局有限公司 Anti-seepage cofferdam structure and construction process
RU2550885C2 (en) * 2013-02-13 2015-05-20 Общество с ограниченной ответственностью "Гидроспецпроект" Earth dam
CN104846777A (en) * 2015-04-24 2015-08-19 中山弘博企业管理咨询有限公司 Anti-seepage water conservancy flood bank
CN105297683A (en) * 2015-10-13 2016-02-03 浙江水利水电学院 Geomembrane core wall hilly pond earth-rock dam and construction method thereof
KR101739657B1 (en) * 2015-11-25 2017-05-26 한국수자원공사 Roller Compacted Concrete And Rockfill Dam
CN106894389A (en) * 2015-12-18 2017-06-27 梁军 A kind of new seepage prevention system and structure for being applicable deep covering layer earth and rockfill dam
CN110080172A (en) * 2019-05-13 2019-08-02 辽宁工程技术大学 A kind of core wall rockfill dam and its construction method with high barrier property energy

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102852121A (en) * 2012-09-24 2013-01-02 长江勘测规划设计研究有限责任公司 Artificial composite foundation for building clay core rock-fill dam on deep overburden and construction method for artificial composite foundation
CN102979061A (en) * 2012-12-04 2013-03-20 合肥工业大学 Oblique membrane core wall earth and rockfill dam and anti-seepage body construction method thereof
CN103114561A (en) * 2013-01-17 2013-05-22 中国水利水电科学研究院 Method of embedding fiber optic sensor (FOS) inside clay core wall
CN103114561B (en) * 2013-01-17 2015-09-16 中国水利水电科学研究院 A kind of method of embedded light fiber sensor in earth core
RU2550885C2 (en) * 2013-02-13 2015-05-20 Общество с ограниченной ответственностью "Гидроспецпроект" Earth dam
CN103410123B (en) * 2013-08-13 2016-03-02 中国电建集团成都勘测设计研究院有限公司 A kind of checkdam for Hydraulic and Hydro-Power Engineering
CN103410123A (en) * 2013-08-13 2013-11-27 中国水电顾问集团成都勘测设计研究院 Retaining dam for hydraulic and hydro-power engineering
CN104153380A (en) * 2014-04-11 2014-11-19 中国水利水电第十一工程局有限公司 Anti-seepage cofferdam structure and construction process
CN104153380B (en) * 2014-04-11 2016-08-24 中国水利水电第十一工程局有限公司 A kind of antiseepage cofferdam structure and construction technology
CN104846777A (en) * 2015-04-24 2015-08-19 中山弘博企业管理咨询有限公司 Anti-seepage water conservancy flood bank
CN105297683A (en) * 2015-10-13 2016-02-03 浙江水利水电学院 Geomembrane core wall hilly pond earth-rock dam and construction method thereof
KR101739657B1 (en) * 2015-11-25 2017-05-26 한국수자원공사 Roller Compacted Concrete And Rockfill Dam
CN106894389A (en) * 2015-12-18 2017-06-27 梁军 A kind of new seepage prevention system and structure for being applicable deep covering layer earth and rockfill dam
CN110080172A (en) * 2019-05-13 2019-08-02 辽宁工程技术大学 A kind of core wall rockfill dam and its construction method with high barrier property energy

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Application publication date: 20120912