某水电站顺层岩质高边坡稳定性地质力学模型试验研究
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摘要
针对顺层岩质高边坡稳定性问题,提出了基于变温相似材料的降强法与倾斜抬升超载法相结合的综合法模型试验方法,推导了边坡稳定的地质力学模型综合法安全系数表达式,并将其应用到某典型顺层岩质边坡工程实例中,对其地质缺陷较集中的I5剖面开展综合法模型试验,获得了边坡的变形特征和破坏过程,揭示了边坡破坏模式为滑移-拉裂破坏,确定了边坡整体稳定综合法安全系数为KSC=1.526~1.575。
Aiming at the problem of stability of bedding high rock slope,the comprehensive test method combined with strength reduction based temperature analogous material and overloading method by obliquely lifting frame was proposed.And the comprehensive safety factor was deduced to apply in the typical bedding rock slope engineering.The research of comprehensive method on the profile I5 that reflects the concentrated geological defects gains the deformation characteristic and failure process,and it reveals that the failure mode is sliding and fracturing.Finally,the comprehensive safety factors KSCby the geo-mechanical experimental test is in the range of 1.526 and 1.575.
Aiming at the problem of stability of bedding high rock slope,the comprehensive test method combined with strength reduction based temperature analogous material and overloading method by obliquely lifting frame was proposed.And the comprehensive safety factor was deduced to apply in the typical bedding rock slope engineering.The research of comprehensive method on the profile I5 that reflects the concentrated geological defects gains the deformation characteristic and failure process,and it reveals that the failure mode is sliding and fracturing.Finally,the comprehensive safety factors KSCby the geo-mechanical experimental test is in the range of 1.526 and 1.575.
引文
[1]宋胜武,巩满福,雷承第.峡谷地区水电工程高边坡的稳定性研究[J].岩石力学与工程学报,2006,25(2):226-234.
[2]周钟,巩满福,雷承第.锦屏一级水电站左坝肩边坡稳定性研究[J].岩石力学与工程学报,2006,25(11):2 298-2 304.
[3]邓洪亮,孙丽霞,廖丹,等.复杂地质条件下岩石边坡的稳定性分析[J].水利与建筑工程学报,2008,6(1):45-48.
[4]周维垣,林鹏,杨强,等.锦屏高边坡稳定三维地质力学模型试验研究[J].岩石力学与工程学报,2008,27(5):893-901.
[5]李明,张噶,李焯芬,等.开挖对边坡变形影响的离心模型试验研究[J].岩土工程学报,2011,33(4):667-672.
[6]马时强,刘斌.锦屏高边坡稳定地质力学模型试验研究[J].西华大学学报:自然科学版,2008,27(4):101-104.
[7]肖诗荣,刘德福,姜福兴,等.三峡库区千将坪滑坡地质力学模型试验研究[J]岩石力学与工程学报,2010,29(5):1 023-1 030.
[8]吴剑,张振华,王幸林,等.边坡物理模型倾斜加载方式的研究[J].岩土力学,2012,33(3):713-718.
[9]张林,陈媛.水工大坝与地基模型试验及工程应用[M].北京:科学出版社,2015.
[2]周钟,巩满福,雷承第.锦屏一级水电站左坝肩边坡稳定性研究[J].岩石力学与工程学报,2006,25(11):2 298-2 304.
[3]邓洪亮,孙丽霞,廖丹,等.复杂地质条件下岩石边坡的稳定性分析[J].水利与建筑工程学报,2008,6(1):45-48.
[4]周维垣,林鹏,杨强,等.锦屏高边坡稳定三维地质力学模型试验研究[J].岩石力学与工程学报,2008,27(5):893-901.
[5]李明,张噶,李焯芬,等.开挖对边坡变形影响的离心模型试验研究[J].岩土工程学报,2011,33(4):667-672.
[6]马时强,刘斌.锦屏高边坡稳定地质力学模型试验研究[J].西华大学学报:自然科学版,2008,27(4):101-104.
[7]肖诗荣,刘德福,姜福兴,等.三峡库区千将坪滑坡地质力学模型试验研究[J]岩石力学与工程学报,2010,29(5):1 023-1 030.
[8]吴剑,张振华,王幸林,等.边坡物理模型倾斜加载方式的研究[J].岩土力学,2012,33(3):713-718.
[9]张林,陈媛.水工大坝与地基模型试验及工程应用[M].北京:科学出版社,2015.