CN102635091A - Earth and rockfill dam impervious element and building method thereof - Google Patents
Earth and rockfill dam impervious element and building method thereof Download PDFInfo
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- CN102635091A CN102635091A CN2012101319509A CN201210131950A CN102635091A CN 102635091 A CN102635091 A CN 102635091A CN 2012101319509 A CN2012101319509 A CN 2012101319509A CN 201210131950 A CN201210131950 A CN 201210131950A CN 102635091 A CN102635091 A CN 102635091A
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Abstract
The invention discloses an earth and rockfill dam impervious element built from a gravelly soil raw material with lower content of clay and meeting the requirement of an osmotic coefficient and a building method of the earth and rockfill dam impervious element. The earth and rockfill dam impervious element is built by adopting the following steps of: a, selecting the gravelly soil raw material: the gravelly soil raw material contains various particles with particle sizes from 0.002mm-200mm, and the content of the particle with the particles size less than 0.005mm is 3.5-5.5 percent; b, screening the gravelly soil raw material, eliminating the particle with the particle size more than 80mm to obtain a seepage preventing material which contains 41.1-69.1 percent of particle with the particle size less than or equal to 5mm, 11.5-36.6 percent of particle with particle size less than or equal to 0.075 mm and 5.3-7.0 percent of particle with particle size less than 0.005mm in each unit weight of the gravelly soil; and c, filling the seepage preventing material and compacting to form the earth and rockfill dam impervious element to ensure that the dry density of the gravelly soil of the earth and rockfill dam impervious element after being compacted is 2.30-2.36(g/cm<3>).
Description
Technical field
The present invention relates to the geotechnical engineering technical field, be specifically related to a kind of earth and rockfill dam antiseepage body and construction method thereof.
Background technology
" rolling earth-rock dam design specifications " (DL/T5395-2007) in to filling the requirement of antiseepage body gravelly soil: " particle diameter should not surpass 50% greater than the granule content of 5mm; the granule content below the 0.075mm should be less than 15%, and content should not be less than 8% less than the particle (promptly glutinous grain) of 0.005mm." in " water power hydraulic engineering natural building material prospecting rules " to filling the requirement of antiseepage body gravelly soil: " particle diameter should not be greater than 50% greater than the granule content of 5mm; 0.075mm following granule content should be less than 15%; And particle (the promptly glutinous grain) content less than 0.005mm should be not less than 6%～8% in full grating, hit real back transmission coefficient less than 1 * 10
-5Cm/s." visible, when the glutinous grain content in the gravelly soil in stock ground was lower than above-mentioned requirements, transmission coefficient often can't meet the demands, and therefore, those skilled in the art not will consider usually and adopt this gravelly soil as the raw material of building earth and rockfill dam.
Summary of the invention
Technical problem to be solved by this invention provides a kind ofly builds and satisfies the earth and rockfill dam antiseepage body that transmission coefficient requires and the construction method of this antiseepage body by the lower gravelly soil raw material of glutinous grain content.
Earth and rockfill dam antiseepage body of the present invention is built by following method and is formed; The step that this method comprises is: a, selection calculous soil raw material: contain the various particles of particle diameter from 0.002mm～200mm in the selected calculous soil raw material, and the granule content of particle diameter＜0.005mm is 3.5%～5.5%; B, above-mentioned calculous soil raw material is screened; Reject particle diameter＞80mm particle; The granule content that obtains particle diameter≤5mm in the calculous soil of per unit weight is 41.1%～69.1%; It is 11.5%～36.6% that the particle of particle diameter≤0.075mm contains, and the granule content of particle diameter＜0.005mm is 5.2%～7.0% anti-bleed; C, above-mentioned anti-bleed is filled and compacting forms earth and rockfill dam antiseepage body, make that the calculous soil dry density of this antiseepage body is 2.30 (g/cm after the compacting
3)～2.36 (g/cm
3).
The construction method of earth and rockfill dam antiseepage body, the step that comprises is: a, selection calculous soil raw material: contain the various particles of particle diameter from 0.002mm～200mm in the selected calculous soil raw material, and the granule content of particle diameter＜0.005mm is 3.5%～5.5%; B, above-mentioned calculous soil raw material is screened; Reject particle diameter＞80mm particle; The granule content that obtains particle diameter≤5mm in the calculous soil of per unit weight is 41.1%～69.1%; It is 11.5%～36.6% that the particle of particle diameter≤0.075mm contains, and the granule content of particle diameter＜0.005mm is 5.2%～7.0% anti-bleed; C, above-mentioned anti-bleed is filled and compacting forms earth and rockfill dam antiseepage body, make that the calculous soil dry density of this antiseepage body is 2.30 (g/cm after the compacting
3)～2.36 (g/cm
3).
The selected calculous soil raw material of the present invention is the less wide grating calculous soil of glutinous grain content, and this raw material has surpassed in the world that the core-wall material of building a dam of statistics rolls off the production line, so those skilled in the art not will consider usually and use this raw material to build earth and rockfill dam antiseepage body.Test shows; Because the present invention has taked the control to the control of calculous soil maximum particle diameter and calculous soil compacting degree, make the antiseepage index of antiseepage body exceed the requirement of existing " rolling earth-rock dam design specifications " and " water power hydraulic engineering natural building material is reconnoitred rules ".The present invention will stick the less wide grating calculous soil of a content first and build earth and rockfill dam antiseepage body as raw material, surmount current specifications, widen the material source range of choice, can supply the similar engineering reference.
The specific embodiment
Embodiment 1
Contain the various particles of particle diameter in the selected calculous soil raw material, and the granule content of particle diameter＜0.005mm is 3.5% from 0.002mm～200mm; Above-mentioned calculous soil raw material is screened; Reject particle diameter＞80mm particle; The granule content that obtains particle diameter≤5mm in the calculous soil of per unit weight is 46.6%, and the granule content of particle diameter≤0.075mm is 17.0%, and the granule content of particle diameter＜0.005mm is 4.6% anti-bleed; Above-mentioned anti-bleed is filled and high function (2400kJ/m
3) compacting forms earth and rockfill dam antiseepage body, makes that the calculous soil dry density of this antiseepage body is 2.32g/cm after the compacting
3Through test, this antiseepage body transmission coefficient is 4.8 * 10
-6Cm/s.
Embodiment 2
Contain the various particles of particle diameter in the selected calculous soil raw material, and the granule content of particle diameter＜0.005mm is 4.0% from 0.002mm～200mm; Above-mentioned calculous soil raw material is screened; Reject particle diameter＞80mm particle; The granule content that obtains particle diameter≤5mm in the calculous soil of per unit weight is 41.8%, and the granule content of particle diameter≤0.075mm is 16.1%, and the granule content of particle diameter＜0.005mm is 5.2% anti-bleed; Above-mentioned anti-bleed is filled and high function (2550kJ/m
3) compacting forms earth and rockfill dam antiseepage body, makes that the calculous soil dry density of this antiseepage body is 2.30 after the compacting.Through test, this antiseepage body transmission coefficient is 3.7 * 10
- 6Cm/s.
Embodiment 3
Contain the various particles of particle diameter in the selected calculous soil raw material, and the granule content of particle diameter＜0.005mm is 4.3% from 0.002mm～200mm; Above-mentioned calculous soil raw material is screened; Reject particle diameter＞80mm particle; The granule content that obtains particle diameter≤5mm in the calculous soil of per unit weight is 51.1%, and the granule content of particle diameter≤0.075mm is 21.9%, and the granule content of particle diameter＜0.005mm is 5.5% anti-bleed; Above-mentioned anti-bleed is filled and high function (2740kJ/m
3) compacting forms earth and rockfill dam antiseepage body, makes that the calculous soil dry density of this antiseepage body is 2.31 after the compacting.Through test, this antiseepage body transmission coefficient is 1.2 * 10
- 6Cm/s.
Claims (2)
1. earth and rockfill dam antiseepage body is formed by following method construction, and the step that this method comprises is:
A, selection calculous soil raw material: contain the various particles of particle diameter in the selected calculous soil raw material, and the granule content of particle diameter＜0.005mm is 3.5%～5.5% from 0.002mm～200mm;
B, above-mentioned calculous soil raw material is screened; Reject particle diameter＞80mm particle; The granule content that obtains particle diameter≤5mm in the calculous soil of per unit weight is 41.1%～69.1%; It is 11.5%～36.6% that the particle of particle diameter≤0.075mm contains, and the granule content of particle diameter＜0.005mm is 5.2%～7.0% anti-bleed;
C, above-mentioned anti-bleed is filled and compacting forms earth and rockfill dam antiseepage body, make that the calculous soil dry density of this antiseepage body is 2.30 (g/cm after the compacting
3)～2.36 (g/cm
3).
2. the construction method of earth and rockfill dam antiseepage body, the step that comprises is:
A, selection calculous soil raw material: contain the various particles of particle diameter in the selected calculous soil raw material, and the granule content of particle diameter＜0.005mm is 3.5%～5.5% from 0.002mm～200mm;
B, above-mentioned calculous soil raw material is screened; Reject particle diameter＞80mm particle; The granule content that obtains particle diameter≤5mm in the calculous soil of per unit weight is 41.1%～69.1%; It is 11.5%～36.6% that the particle of particle diameter≤0.075mm contains, and the granule content of particle diameter＜0.005mm is 5.2%～7.0% anti-bleed;
C, above-mentioned anti-bleed is filled and compacting forms earth and rockfill dam antiseepage body, make that the calculous soil dry density of this antiseepage body is 2.30 (g/cm after the compacting
3)～2.36 (g/cm
3).
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|---|---|---|---|
| CN2012101319509A CN102635091A (en) | 2012-04-28 | 2012-04-28 | Earth and rockfill dam impervious element and building method thereof |
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|---|---|---|---|
| CN2012101319509A CN102635091A (en) | 2012-04-28 | 2012-04-28 | Earth and rockfill dam impervious element and building method thereof |
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Citations (5)
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|---|---|---|---|---|
| EP0550926B1 (en) * | 1991-12-09 | 2000-03-29 | B.V. Grint- en Zandexploitatiemaatschappij v/h Gebrs. Smals | Method for extracting and providing in desired composition granular material such as sand |
| NL1012405C2 (en) * | 1999-06-22 | 2000-12-28 | Dekker Zandbaggerbedrijf B V | Screening raw sand and gravel then crushing larger grains and mixing crushed material with original finer grains to produce mixture with required properties for making concrete |
| CN101653765A (en) * | 2009-09-11 | 2010-02-24 | 中国葛洲坝集团股份有限公司 | Method for adjusting gradation of gravel earth material |
| CN101672026A (en) * | 2009-09-18 | 2010-03-17 | 中国水电顾问集团华东勘测设计研究院 | Face plate rock-fill dam structure of reasonably utilizing sand gravel material and construction method thereof |
| CN102152398A (en) * | 2011-01-27 | 2011-08-17 | 葛洲坝集团试验检测有限公司 | Gravel doped grinding system for anti-leakage wall and preparation method thereof |
-
2012
- 2012-04-28 CN CN2012101319509A patent/CN102635091A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0550926B1 (en) * | 1991-12-09 | 2000-03-29 | B.V. Grint- en Zandexploitatiemaatschappij v/h Gebrs. Smals | Method for extracting and providing in desired composition granular material such as sand |
| NL1012405C2 (en) * | 1999-06-22 | 2000-12-28 | Dekker Zandbaggerbedrijf B V | Screening raw sand and gravel then crushing larger grains and mixing crushed material with original finer grains to produce mixture with required properties for making concrete |
| CN101653765A (en) * | 2009-09-11 | 2010-02-24 | 中国葛洲坝集团股份有限公司 | Method for adjusting gradation of gravel earth material |
| CN101672026A (en) * | 2009-09-18 | 2010-03-17 | 中国水电顾问集团华东勘测设计研究院 | Face plate rock-fill dam structure of reasonably utilizing sand gravel material and construction method thereof |
| CN102152398A (en) * | 2011-01-27 | 2011-08-17 | 葛洲坝集团试验检测有限公司 | Gravel doped grinding system for anti-leakage wall and preparation method thereof |
Non-Patent Citations (3)
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| 余挺: "砾质土防渗料在高土石坝上的应用", 《水电站设计》, vol. 19, no. 3, 30 September 2003 (2003-09-30) * |
| 吕衡、李小泉: "瀑布沟工程宽级配砾石土抗渗性能改善试验研究", 《四川水力发电》, no. 2, 30 June 1996 (1996-06-30) * |
| 雷泽宏: "瀑布沟水电站黑马Ⅰ区防渗料的选择", 《岩土力学与工程学报》, vol. 21, no. 9, 30 September 2002 (2002-09-30) * |
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Application publication date: 20120815 |