强降雨特性对饱和–非饱和边坡失稳破坏的影响

doi:10.13722/j.cnki.jrme.2014.s2.088

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摘要在调研和总结国内典型灾害性滑坡的基础上，概化典型边坡数值模型，进行饱和–非饱和边坡的瞬态渗流场与应力场的耦合分析。结合强度折减技术进行瞬态渗流作用下边坡稳定性计算，得到边坡整体稳定安全系数，并基于ABAQUS软件实现渗流与应力耦合作用下的破坏接近度(FAI)评价方法，多角度综合探究强降雨特性对边坡失稳机制及稳定性的影响。结果表明：(1) 强降雨会导致边坡临空面特别是下部土体的应力程度恶化，易使边坡出现滑流冲蚀和局部的坍塌失稳；(2) 雨型对边坡孔压的时空演化、变形响应、安全系数及FAI的影响均明显，孔压和变形与雨型各时刻的雨强呈正相关关系；(3) 低强度长持时降雨会渐次增加深层土体的孔压，易使边坡产生深层滑动失稳，而高强度短持时降雨易使坡趾最先失稳，之后破坏区向坡顶渐进扩展；(4) 雨强与安全系数呈反比关系，当雨强由12 mm/h增大到36 mm/h时，安全系数约降低17%，且雨强直接影响边坡破坏区的破坏程度和非破裂区的危险程度，高强度的暴雨更易使坡趾出现滑移失稳。

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	张社荣
	谭尧升
	王超
	于茂

关键词 ：边坡工程；降雨入渗；饱和&ndash, 非饱和渗流；降雨雨型；降雨强度；破坏接近度

Abstract：Based on surveying and summarizing typical domestic landslide disasters，a saturated-unsaturated slope model was generalized and the software platform of ABAQUS was applied to solve the model by method of a coupled analysis of transient seepage field and stress field under the infiltration of heavy rainfalls. Combined strength reduction technique to analyze the slope stability under transient seepage，and safety factors of the overall stability were gained，proposing and implementing the evaluation method of failure approach index(FAI) by coupling of seepage and stress fields，revealing slope rock mass strength reserve，the degree of damage and criticality of non-rupture areas to explore the impacts of heavy rainfall characteristics on slope failure mechanism and stability from various angles. Results showed that：(1) Heavy rainfall will lead stress levels to deteriorate in the slope free face particularly lower rock mass，with easily bring about flow erosion damage and partial collapse. (2) The effect of rainfall patterns on time and space evolution of pore pressure，deformation response，safety factors and FAI is obvious，pore pressure and deformation are positive correlation to different raininesses. (3) Pore pressure will increase gradually under the long duration rainfall with low intensity and easily lead to deep slide damage. The slope toe is the first failure region under the short duration rainfall with high intensity. (4) Rain intensity is inversely proportional with the safety factor which is reduced by approximately 17% when raininess varies from 12 mm/h to 36 mm/h，which affects the extent of failure parts and criticality in non-rupture parts，and high-intensity rainstorms make it easier for the slope toe slippage.

Key words： slope engineering rainfall infiltration saturated-unsaturated seepage rainfall pattern rainfall intensity failure approach index

引用本文:

张社荣，谭尧升，王超，于茂. 强降雨特性对饱和–非饱和边坡失稳破坏的影响[J]. 岩石力学与工程学报, 2014, 33(S2): 4102-4112.
ZHANG Sherong，TAN Yaosheng，WANG Chao，YU Mao. INFLUENCE OF HEAVY RAINFALL CHARACTERISTICS ON SATURATED-UNSATURATED SLOPE FAILURE. , 2014, 33(S2): 4102-4112.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2014.s2.088 或 https://rockmech.whrsm.ac.cn/CN/Y2014/V33/IS2/4102

[1]	周家文，徐卫亚，邓俊哗，等. 降雨入渗条件下边坡的稳定性分析[J]. 水利学报，2008，39(9)：1 066-1 073.(ZHOU Jiawen，XU Weiya，DENG Junye，et al. Stability analysis of slope under the condition of rainfall infiltration[J]. Journal of Hydraulic Engineering，2008，39(9)：1 066-1 073.(in Chinese))
[2]	NG C W W，ZHAN L T，BAO C G，et al. Performance ofan unsaturated expansive soil slope subjected to artificial rainfallinfiltration[J]. Geotechnique，2003，53(2)：143-157.
[3]	RAHIMI A，RAHARDJO H，LEONG E C. Effect of hydraulicproperties of soil on rainfall-induced slope failure[J]. Engineering Geology，2010，114(3)：135-143.
[4]	OH W T，VANAPALLI S K. Influence of rain infiltration on the stability of compacted soil slopes[J]. Computers and Geotechnics，2010，37(5)：649-657.
[5]	戚国庆，黄润秋，速宝玉，等. 岩质边坡降雨入渗过程的数值模拟[J]. 岩石力学与工程学报，2003，22(4)：625-629.(QI Guoqing，HUANG Runqiu，SU Baoyu，et al. Numeric simulation on rainfall infiltration on rock slope[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(4)：625-629.(in Chinese))
[6]	荣冠，王思敬，王恩志，等. 强降雨下元磨公路典型工程边坡稳定性研究[J]. 岩石力学与工程学报，2008，27(4)：704-711.(RONG Guan，WANG Sijing，WANG Enzhi，et al. Stability analysis of Yuanmo highway slope under intensive rainfall[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(4)：704-711.(in Chinese))
[7]	吴李泉，张峰，凌贤长，等. 强降雨条件下浙江武义平头村山体高边坡稳定性分析[J]. 岩石力学与工程学报，2009，28(6)：1 193-1 199.(WU Liquan，ZHANGFeng，LINGXianzhang，et al. Stability analysis of high slope subjectedto heavy rainfall in Pingtou village of Wuyi county Zhejiang province[J]. Chinese Journal of Rock Mechanicsand Engineering，2009，28(6)：1 193-1 199.(in Chinese))
[8]	付宏渊，曾铃，王桂尧，等. 降雨入渗条件下软岩边坡稳定性分析[J]. 岩土力学，2012，33(8)：2 359-2 365.(FU Hongyuan，ZENG Ling，WANG Guiyao，et al. Stability analysis of soft rock slope under rainfall infiltration[J]. Rock and Soil Mechanics，2012，33(8)：2 359-2 365.(in Chinese))
[9]	沈水进，孙红月，尚岳全，等. 降雨作用下路堤边坡的冲刷-渗透耦合分析[J]. 岩石力学与工程学报，2011，30(12)：2 456-2 462. (SHEN Shuijin，SUN Hongyue，SHANGYuequan，et al. Scouring- penetration coupling analysis of embankment slope under rainfall action[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(12)：2 456-2 462.(in Chinese))
[10]	林鸿州，于玉贞，李广信，等. 降雨特性对土质边坡失稳的影响[J]. 岩石力学与工程学报，2009，28(1)：198-204.(LIN Hungchou，YU Yuzhen，LI Guangxin，et al. Influence of rainfall characteristics on soil slope failure[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(1)：198-204.(in Chinese))
[11]	孙军杰，王兰民，龙鹏伟，等. 地震与降雨耦合作用下区域滑坡灾害评价方法[J]. 岩石力学与工程学报，2011，30(4)：752-760.(SUN Junjie，WANG Lanmin，LONG Pengwei，et al. An assessment method for regional susceptibility of landslides under coupling condition of earthquake and rainfall[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(4)：752-760.(in Chinese))
[12]	魏宁，茜平一，傅旭东，等. 降雨和蒸发对土质边坡稳定性的影响[J]. 岩土力学，2006，27(5)：778-786.(WEI Ning，QIAN Pingyi，FU Xudong，et al. Effects of rainfall infiltration and evaporation on soil slope stability[J]. Rock and Soil Mechanics，2006，27(5)：778-786.(in Chinese))
[13]	徐晗，朱以文，蔡元奇，等. 降雨入渗条件下非饱和土边坡稳定分析[J]. 岩土力学，2005，26(12)：1 957-1 962.(XU Han，ZHU Yiwen，CAI Yuanqi，et al. Stability analysis of unsaturated soil slopes under rainfall infiltration[J]. Rock and Soil Mechanics，2005，26(12)：1 957-1 962.(in Chinese))
[14]	周辉，张传庆，冯夏庭，等. 隧道及地下工程围岩的屈服接近度分析[J]. 岩石力学与工程学报，2005，24(17)：3 083-3 087.(ZHOU Hui，ZHANG Chuanqing，FENG Xiating，et al. Analysis of rock mass stability in tunnel and underground engineering based on yield approach index[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(17)：3 083-3 087.(in Chinese))
[15]	张传庆，周辉，冯夏庭. 基于破坏接近度的岩土工程稳定性评价[J]. 岩土力学，2007，28(5)：888-894.(ZHANG Chuanqing，ZHOU Hui，FENG Xiating. Stability assessment of rockmass engineering based on failure approach index[J]. Rock and Soil Mechanics，2007，28(5)：888-894.(in Chinese))
[16]	CHO S E，LEE S R. Instability of unsaturated soil slopes due to infiltration[J]. Computers and Geotechnics，2001，28(3)：185-208.
[17]	徐晗，朱以文，蔡元奇，等. 降雨入渗条件下非饱和土边坡稳定分析[J]. 岩土力学，2005，26(12)：1 957-1 962.(XU Han，ZHU Yiwen，CAI Yuanqi，et al. Stability analysis of unsaturated soil slopes under rainfall infiltration[J]. Rock and Soil Mechanics，2005，26(12)：1 957-1 962.(in Chinese))
[18]	KIM J，JEONG S，REGUEIRO R A.Instability of partially saturated soil slopes due to alteration of rainfall pattern[J]. Engineering Geology，2012，147：28-36.
[19]	费康，张建伟.Abaqus在岩土工程中的应用[M].北京：中国水利水电出版社，2010：222-233.(FEI Kang，ZHANGJianwei.Abaqus application in geotechnical engineering[M]. Beijing：ChineseWater Conservancy and Hydropower Press，2010：222-233.(in Chinese))
[20]	廖秋林，李晓，李守定，等. 三峡库区千将坪滑坡的发生、地质地貌特征、成因及滑坡判据研究[J]. 岩石力学与工程学报，2005，24(17)：3 146-3 153.(LIAO Qiulin，LI Xiao，LEE Souting，et al. Occurrence，geology and geomorphy characteristics and origin of Qianjiangping landslide in Three Gorges reservoir area and study on ancient landslide criterion[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(17)：3 146-3 153.(in Chinese))
[21]	乔建平，吴彩燕，李秀珍，等. 四川省宣汉县天台乡特大型滑坡分析[J]. 山地学报，2005，23(4)：458-461.(QIAO Jianping，WU Caiyan，LI Xiuzhen. Analysis on super large-scale landslide in Tiantai，Xuanhan，Sichuan[J]. Journal of Mountain Science，2005，23(4)：458-461.(in Chinese))
[22]	王治华，徐起德，徐斌. 岩门村滑坡高分辨率遥感调查与机制分析[J]. 岩石力学与工程学报，2009，28(9)：1 810-1 818.(WANG Zhihua，XU Qide，XU Bin. High resolution remote sensing survey and mechanism analysis for Yanmen village landslide[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(9)：1 810-1 818.(in Chinese))
[23]	MEIN R G，LARSON C L. Modelling infiltration during asteady rain[J]. Water Resource Research，1973，9(2)：384-393.