乌弄龙水电站风化岩体边坡稳定性分析
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摘要
岩体在风化过程中,其物理力学性质会随着风化程度的不同有所差异;而边坡稳定性计算中,各类材料参数的正确与否对于计算结果有着重要的影响,因此如何在边坡稳定计算中考虑风化程度的影响具有重要的意义。为了评价乌弄龙水电站导流洞开挖边坡(风化影响突出)的稳定性,分析过程中首先对导流洞进水口边坡的风化卸荷带进行了划分;然后通过岩体质量和风化程度的对应关系对边坡岩体进行分级,并按照岩级确定了边坡岩体的力学参数;最后采用有限元应力应变法分析了边坡开挖过程的破坏区类型和分布范围,同时采用强度折减有限元计算了边坡的安全系数。计算分析结果表明边坡开挖以后有着较高的稳定性。
;The physical and mechanical properties of rockmass has been changing during weathering progress.Proper or not of rockmass parameters have a significant effect on the results of stability analysis.So,it is of great importance considering the weathering affect on properties of rockmass.In order to evaluate inlet slope stability of diversion tunnel of Wunonglong hydropower station,classification of weathering and unloading rockmass has been done based on relation between rockmass quality and weathering class.Rockmass parameters have been determined in comply with above-mentioned rockmass classification results.At last,using FEM(Finite Element Analysis) method,failure type and scale of cut slope were determined,the results of calculation show cut slope has a good stable condition.
;The physical and mechanical properties of rockmass has been changing during weathering progress.Proper or not of rockmass parameters have a significant effect on the results of stability analysis.So,it is of great importance considering the weathering affect on properties of rockmass.In order to evaluate inlet slope stability of diversion tunnel of Wunonglong hydropower station,classification of weathering and unloading rockmass has been done based on relation between rockmass quality and weathering class.Rockmass parameters have been determined in comply with above-mentioned rockmass classification results.At last,using FEM(Finite Element Analysis) method,failure type and scale of cut slope were determined,the results of calculation show cut slope has a good stable condition.
引文
[1]黄求顺,张四平,胡岱文.边坡工程[M].重庆:重庆大学出版社,2003:122-130.
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[3]聂德新,韩爱果,巨广宏.岩体风化的综合分带研究[J].工程地质学报,2002,10(1).3-8.
[4]贾东远,阴可,李艳华.岩石边坡稳定性分析方法[J].地下空间,2004,24(2):250-255.
[5]丁宝晶.溪洛渡水电站建基面Ⅲ2级岩体分布及可利用性研究[D].成都理工大学,2009:49-51.
[6]张社荣,彭敏瑞,董绍尧.岩质边坡稳定性分析方法及工程应用[J].中国农村水利水电,2007(4):94-96.
[7]程飞.泸定水电站厂房后缘边坡稳定性数值分析[D].西华大学,2009:19-22.
[2]廖颜营.风化岩分带指标定量研究[M].北京:地震出版社,1994:151-173.
[3]聂德新,韩爱果,巨广宏.岩体风化的综合分带研究[J].工程地质学报,2002,10(1).3-8.
[4]贾东远,阴可,李艳华.岩石边坡稳定性分析方法[J].地下空间,2004,24(2):250-255.
[5]丁宝晶.溪洛渡水电站建基面Ⅲ2级岩体分布及可利用性研究[D].成都理工大学,2009:49-51.
[6]张社荣,彭敏瑞,董绍尧.岩质边坡稳定性分析方法及工程应用[J].中国农村水利水电,2007(4):94-96.
[7]程飞.泸定水电站厂房后缘边坡稳定性数值分析[D].西华大学,2009:19-22.
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