复合土工膜心墙与斜墙高土石坝应力应变研究

姜海波

doi:10.3969/j.issn.1001-5485.2014.01.0112014,31(01):53-57,76

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长江科学院院报 ›› 2014, Vol. 31 ›› Issue (1) : 53-57. DOI: 10.3969/j.issn.1001-5485.2014.01.0112014,31(01):53-57,76

岩土工程

复合土工膜心墙与斜墙高土石坝应力应变研究

姜海波

作者信息 +

Stress and Strain of High Earth-rock Dam with Composite Geomembrane Core-wall and Inclined-wall

JIANG Hai-bo

Author information +

文章历史 +

摘要

高土石坝在静力情况下的应力、变形特性和抗水力劈裂性能一直是高土石坝设计和施工的关键问题。为了研究复合土工膜高土石坝的应力应变特性，以一座坝高127.5 m的复合土工膜高土石坝为例，基于有限元计算方法，采用邓肯张E-B模型，分析和计算竣工期及渗流稳定期复合土工膜高土石坝坝壳料堆石体应力和应变、坝壳料堆石体变形以及大坝渗流量，得出复合土工膜心墙式和斜墙式高土石坝的应力变形特性，并对是否发生水力劈裂进行判断。算例表明复合土工膜对降低坝体浸润线，减小坝体孔隙水压力均有显著作用，堆石体的应力应变有了一定的改善，且不会发生水力劈裂等不利问题。

Abstract

Stress and deformation properties and hydraulic fracturing performance have been key issues in the design and construction of high earth-rock dam. In order to research the stress and deformation properties of high earth-rock dam treated with composite geo-membrane,non-linear FEM and Duncan-Chang E-B Model were employed to analyze the stress and deformation of a composite geo-membrane rock-fill dam of 127.5m height. The stress-strain and deformation behaviors of dam shell rockfill and the seepage of dam body in project-completion period and stable seepage period were calculated and analyzed. Hence the stress and deformation behaviors of composite geomembrane high earth-rock dam with core-wall and inclined wall were obtained. Hydraulic fracturing was also estimated. The calculation results show that the stress and deformation behaviors of dam body and composite geo-membrane are in normal state. Composite geo-membrane is effective in reducing phreatic line and pore water pressure,improving stress-strain properties,and preventing hydraulic fracturing.

导出引用

姜海波. 复合土工膜心墙与斜墙高土石坝应力应变研究[J]. 长江科学院院报. 2014, 31(1): 53-57 https://doi.org/10.3969/j.issn.1001-5485.2014.01.0112014,31(01):53-57,76

JIANG Hai-bo. Stress and Strain of High Earth-rock Dam with Composite Geomembrane Core-wall and Inclined-wall[J]. Journal of Changjiang River Scientific Research Institute. 2014, 31(1): 53-57 https://doi.org/10.3969/j.issn.1001-5485.2014.01.0112014,31(01):53-57,76

中图分类号： TV641.1

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