高土石围堰复合土工膜应变集中计算方法研究

doi:10.13722/j.cnki.jrme.2015.0121

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Abstract Composite geomembrane is a type of geosynthetics with the main components of geomembrane at one side or both sides stuck with geotextile. Composite geomembrane has been widely applied in the field of water conservancy，transportation and disposal of nuclear waste landfill for its low permeability，strong deformation adaptability，convenient erection and dismantling. Aiming at the problem of centralized damage and leakage induced by tensile failure or tear of composite geomembrane in the extensive use of rapid construction of high water head rockfill cofferdam，some analysis were conducted and revealed that structural damages were induced by strain concentration which exceed the limit elongation of composite geomembrane located in these junctional zone between hard foundation and soft composite material. Based on the theoretical analysis of composite geomembrane material mechanical properties as well as microscopic mechanism interaction between the geomembrane and joint，the description method of geometry and physics of composite geomembrane strain concentration were suggested. The corresponding peripheral membrane element FEM prediction mode was also put forward based on the treatment method of Concrete Face Rockfill Dam peripheral joint. The constitutive relation and displacement model were planted in the 3D FEM program. The strain concentration behavior of geomembrane in Baihetan hydropower 85 m height earth-rock cofferdam was obtained. Valuable data and conclusions were obtained to guide the safe utilization and generalization of composite geomembrane in high water head condition and complex stress state.

Key words： soil mechanics composite geomembrane high earth-rock cofferdam junctional zone strain concentration peripheral membrane element Baihetan hydropower

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	Articles by authors
	WANG Yongming1
	DENG Yuan1
	REN Jinming1
	ZHU Sheng2
	CAI Jianguo1
	LIANG Xianpei1

Cite this article:

WANG Yongming1,DENG Yuan1,REN Jinming1, et al. Study of calculation methods of composite geomembrane concentration in high earthrock cofferdam[J]. , 2016, 35(S1): 3299-3307.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.0121 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS1/3299

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[4]	GIROUDJP，SODERMANKL.Design of structure connected to geomembranes[J]. Geosynthetics International，1995，2(2)：379-428.
[5]	GIROUDJP，SODERMANKL.Comparison of geomembranes subjected to differential settlement[J]. Geosynthetics International，1995，2(6)：953-968.
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[13]	岑威钧，沈长松，童建文. 深厚覆盖层上复合土工膜防渗堆石坝筑坝特性研究[J].岩土力学，2009，30(1)：175-180.(CEN Weijun，SHEN Changsong，TONG Jianwen. Study of construction behavior of composite geomembrane rockfill dam on thick alluvium deposit[J].Rock and Soil Mechanics，2009，30(1)：175-180.(in Chinese))
[14]	王永明，任金明，陈永红，等. 基于混凝土多轴强度的高土石围堰防渗墙安全性研究[J].岩石力学与工程学报，2014，33(增1)：2 662-2 669.(WANGYongming，REN Jinming，CHENYonghong，et al. Research on high earth rock cofferdam impervious wall security based on multi-axial strength of concrete[J].Chinese Journal ofRock Mechanics and Engineering，2014，33(Supp.1)：2 662-2669.(in Chinese))
[15]	DUNCAN J M，CHANG G Y. Non-linear analysis of stresses and strain in soils[J]. Journal of the Soil Mechanics and Foundations Division，1970，96(5)：1 629-1 652.
[16]	李青云，程展林. 三峡工程二期围堰运行后性状分析[J].岩土工程学报，2005，27(4)：410-413.(LI Qingyun，CHENG Zhanlin. Analysis of the behavior of stage II of cofferdam of TGP[J].Chinese Journal ofGeotechnical Engineering，2005，27(4)：410-413.(in Chinese))
[17]	刘斯宏，徐永福.粒状体直剪试验的数值模拟与微观考察[J].岩石力学与工程学报，2001，20(3)：288-292.(LIUSihong，XU Yongfu. Numerical simulation for a direct box shear test on granular material and microscopicand microscopicconsideration[J].Chinese Journal ofRock Mechanics and Engineering，2001，20(3)：288-292.(in Chinese))
[1]	花加凤，束一鸣，张贵科，等. 土石坝坝面防渗膜中的夹具效应[J].水利水电科技进展，2007，27(2)：66-68.(HUA Jiafeng，SHU Yiming，ZHANGGuike，et al. Clamping effect in geomembranes used for seepage control of upstream surface of earth rock dam[J].Advances in Science and Technology of water Resources，2007，27(2)：66-68.(in Chinese))
[2]	曹克明，汪易森，徐建军，等. 混凝土面板堆石坝[M].北京：中国水利水电出版社，2008：312-313.(CAO Keming，WANGYisen，XUJiangjun，et al. Concreteface rockfill dam[M].Beijing：China Waterand Power，2008：312-313.(in Chinese))
[3]	GIROUDJP，TISSEAU B，SODERMAN KL，et al. Analysis of strain concentration next to geomembrane seams[J]. Geosynthetics International，1995，2(6)：255-276.
[4]	GIROUDJP，SODERMANKL.Design of structure connected to geomembranes[J]. Geosynthetics International，1995，2(2)：379-428.
[5]	GIROUDJP，SODERMANKL.Comparison of geomembranes subjected to differential settlement[J]. Geosynthetics International，1995，2(6)：953-968.
[6]	KODIKARAJ. Analysis of tension development in geomembrane placed on landfill slopes[J]. Geotextiles and Geomembranes，2000，18：47-61.
[7]	TOGNONR，MOOREID. Geomembrane strain observed in large-scale testing of protection layers[J]. Journalof Geotechnical and Geo-enviromental Engineering，ASCE，2000，126(12)：1194-1208.
[8]	ZHU B，GAO D，CHEN YM. Geomembrane tensions and strains resulting from differential settlement around rigid circular structures[J]. Geotexts and Geomembranes，2009，27：53-62.
[9]	沈长松，顾淦臣.复合土工膜厚度计算方法研究[J].河海大学学报. 2004，32(4)：395-398.(SHEN Changsong，GUGancheng. Calculationmethod for thickness of composite geomembrane[J]..Journal of Hohai University，2004，32(4)：395-398.(in Chinese))
[10]	岑威钧，沈长松，李星，等.堤坝中防渗(复合)土工膜的布置型式及计算理论研究[J]. 红水河，2004，23(3)：70-74.(CEN Weijun，SHEN Changsong，LI Xing，et al. Study on layout pattern and computation theory of impervious(composite) geomembrane in dike and dam[J]. Hongshui River，2004，23(3)：70-74.(in Chinese))
[11]	中国水电顾问集团华东勘测设计研究院. 金沙江白鹤水电站施工导流专题研究报告[R]. 杭州：中国水电顾问集团华东勘测设计研究院，2011.(HydroChina Huadong Engineering Corporation. A special report on construction diversion of Jinsha river Baihetan hydropower[R].Hanzhou：HydroChina Huadong Engineering Corporation，2011.(in Chinese))
[12]	顾淦臣，束一鸣，沈长松. 土石坝工程经验与创新[M]. 北京：中国电力出版社，2004：247-248.(GUGancheng，SHU Yiming，SHEN Changsong. Experience and innovation of Earth rock-fill dam Engineering[M].Beijing：China Electric Power Press，2004：247-248.(in Chinese))
[13]	岑威钧，沈长松，童建文. 深厚覆盖层上复合土工膜防渗堆石坝筑坝特性研究[J].岩土力学，2009，30(1)：175-180.(CEN Weijun，SHEN Changsong，TONG Jianwen. Study of construction behavior of composite geomembrane rockfill dam on thick alluvium deposit[J].Rock and Soil Mechanics，2009，30(1)：175-180.(in Chinese))
[14]	王永明，任金明，陈永红，等. 基于混凝土多轴强度的高土石围堰防渗墙安全性研究[J].岩石力学与工程学报，2014，33(增1)：2 662-2 669.(WANGYongming，REN Jinming，CHENYonghong，et al. Research on high earth rock cofferdam impervious wall security based on multi-axial strength of concrete[J].Chinese Journal ofRock Mechanics and Engineering，2014，33(Supp.1)：2 662-2669.(in Chinese))
[15]	DUNCAN J M，CHANG G Y. Non-linear analysis of stresses and strain in soils[J]. Journal of the Soil Mechanics and Foundations Division，1970，96(5)：1 629-1 652.
[16]	李青云，程展林. 三峡工程二期围堰运行后性状分析[J].岩土工程学报，2005，27(4)：410-413.(LI Qingyun，CHENG Zhanlin. Analysis of the behavior of stage II of cofferdam of TGP[J].Chinese Journal ofGeotechnical Engineering，2005，27(4)：410-413.(in Chinese))
[17]	刘斯宏，徐永福.粒状体直剪试验的数值模拟与微观考察[J].岩石力学与工程学报，2001，20(3)：288-292.(LIUSihong，XU Yongfu. Numerical simulation for a direct box shear test on granular material and microscopicand microscopicconsideration[J].Chinese Journal ofRock Mechanics and Engineering，2001，20(3)：288-292.(in Chinese))