地震作用下滑坡的稳定性分析及治理措施
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摘要
以川藏公路田妥—怒江段一滑坡为研究背景,采用拟静力法的有限元强度折减法和简化Bishop法对滑坡地震作用下的稳定性进行了计算分析。通过分析得到滑坡整治前在地震作用下处于滑动状态,应及时对该段滑坡进行整治,提出了合理的整治方案并进行了安全性评价。结果表明:整治后滑坡在地震作用下的安全系数大于设计安全系数。研究成果为类似滑坡在地震作用下的稳定性分析和整治工程设计提供了依据。
The strength reduction FEM method based on the quasi-static method and the simplified Bishop method are selected to analyze the stability of a landslide under earthquake in the background of the landslide of Tiantuo to Nujiang rive section in Sichuan-Tibet Road.The calculation indicates that the landslide under earthquake is in an unstable state and regulation project should be taken in time.Advisable regulation schemes of the landslide are put forward.The results indicate that the safety coefficients after the regulation are greater than design safety coefficients.And the achievements are proceeded to provide evidences for the stability analysis in earthquake as well as the design of the landslide regulation schemes of the similar landslide.
The strength reduction FEM method based on the quasi-static method and the simplified Bishop method are selected to analyze the stability of a landslide under earthquake in the background of the landslide of Tiantuo to Nujiang rive section in Sichuan-Tibet Road.The calculation indicates that the landslide under earthquake is in an unstable state and regulation project should be taken in time.Advisable regulation schemes of the landslide are put forward.The results indicate that the safety coefficients after the regulation are greater than design safety coefficients.And the achievements are proceeded to provide evidences for the stability analysis in earthquake as well as the design of the landslide regulation schemes of the similar landslide.
引文
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[2]郑颖人,赵尚毅,肖佑昆.用有限元强度折减法分析具有非贯通结构面岩质边坡稳定性[J].地质与勘探,2003,39(8):12-16.ZHENG Ying-ren,ZHAO Shang-yi,XIAO You-kun.Jointedrock slope stability analysis by strength reduction FEM[J].Geol-ogy and Prospecting,2003,39(8):12-16.
[3]董玉文,任青文.屈服准则对边坡稳定有限元分析的影响研究[J].水电能源科学,2009,27(1):137-139.DONG Yu-wen,RENQing-wen.Influence of yield criterion onanalysis of slope stabilization by FEM[J].Water Resources andPower,2009,27(1):137-139.
[4]李垠,苏凯,李杰.Mohr-Coulomb等面积圆屈服准则在边坡稳定分析中的应用[J].大地测量与地球动力学,2009,29(1):135-139.LI Yin,SU Kai,LI Jie.Application of Mohr-Coulomb equiva-lent area yield criterion to slope stability analysis[J].Journal ofGeodesy and Geodynamics,2009,29(1):135-139.
[5]田振刚.有限元强度折减法在边坡计算中失稳判据的讨论[J].公路交通技术,2009,4(11):29-31.TIAN Zhen-gang.Discussion on destabilization criteria of finiteelement strength reduction method in sope calculation[J].Tech-nology of Highway and Transport,2009,4(11):29-31.
[6]廖麦秋.预应力锚索-抗滑桩联合支护技术在高速公路路堤边坡加固工程中的应用[J].重庆建筑,2009,1(22):22-25.LIAO Mai-qiu.Application of prestressed anchor-cable and an-tislide pile combined support technology in highway embankmentslope reinforcement project[J].Chongqing Architecture,2009,1(22):22-25.
[7]巨能攀,赵建军,邓辉,等.公路高边坡稳定性评价及支护优化设计[J].岩石力学与工程学报,2009,28(6):1152-1161.JUNeng-pan,ZHAO Jian-jun,DENG Hui,et al.Stabilityealuation of high slope for highways and optimized support design[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(6):1152-1161.
[8]Singh V K,Singh J K,Kumar A.Geotechnical study for optimi-zing the slope design of a deep open-pit mine,India[J].Bulletinof Engineering Geology and the Environment,2005,64(3):303-309.
[9]王宏,钟宁,王志超.重庆奉云高速公路挖断村滑坡的成因分析与治理措施[J].重庆交通大学学报:自然科学版,2010,29(1):85-89.WANG Hong,ZHONG Ning,WANG Zhi-chao.Causes analysisand control measures of Waduan village landslide on Feng-Yun ex-pressway in Chongqing[J].Journal of Chongqing Jiaotong Univer-sity:Natural Science,2010,29(1):85-89.
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