顺层震裂斜坡降雨触发灾变机制及稳定性分析——以三溪村滑坡为例

doi:10.13722/j.cnki.jrme.2016.0420

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (1390 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要震裂斜坡作为震后灾区潜在的高危地质灾害承载体分布广泛，尤其在雨季突发失稳的现象突出。针对该类灾害，以三溪村滑坡为例，通过现场详细调查，采用Seep模块探寻降雨作用下斜坡的水响应规律，并通过室内试验获取不同条件下的强度参数。在此基础上，对降雨触发型震裂斜坡变形破坏的机制模式进行归纳，参照滑坡所处实际情况建立相应的水力学模型，量化计算斜坡稳定性系数。研究表明：(1) 顺层震裂斜坡灾变过程可分为原始斜坡–地震损伤–蠕变弱化–降雨触发–滑坡失稳5个演化阶段。(2) 降雨是岩体形成深部裂隙、节理扩展从而切割岩体呈条块状的重要原因，同时裂隙的贯通促进了降雨入渗，导致滑带饱水软化、加速蠕变变形至失稳。(3) 降雨与震后蠕变效应的耦合作用是影响坡体稳定性的主要因素，经历前期的降雨饱水软化以及同期的蠕变累计变形，最终在暴雨形成的水动力触发下失稳破坏。研究成果为降雨型震裂斜坡稳定性机制分析及工程治理提供参考。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	冯文凯
	胡云鹏
	谢吉尊
	王琦
	吴刚

关键词 ：边坡工程, 震裂斜坡, 降雨, 蠕变, 灾变机制

Abstract：Widely distributed shattered slopes are potentially high-risk carriers of geological disasters in earthquake areas especially in the rainy season. A slope in Sanxicun was studied as an example in this paper. Based on the detailed site investigations，the effect of rainfall was investigated with the Seep model. The strength parameters under different conditions were acquired in the laboratory tests. The deformation and destructive mechanism of the shattered slope triggered by rainfall were summarized. The slope stability in the light of the actual situation and the corresponding mechanical model was calculated. The sliding process of the shattered bedding slope was divided into five stages such as the original status，earthquake damage，creep weakening，rainfall triggering and sliding. Rainfall was found to be the main reason to form deep cracks，expanding joints and massive rock strips. At the same time，the cracks promote the rainfall infiltration，resulting in water softening，creep deformation and finally sliding. The main factor to affect the stability of the slope is the interaction of rainfall and creep after the earthquake.

Key words： slope engineering shattering slopes rainfall creep deformation disaster mechanism

引用本文:

冯文凯，胡云鹏，谢吉尊，王琦，吴刚. 顺层震裂斜坡降雨触发灾变机制及稳定性分析——以三溪村滑坡为例[J]. 岩石力学与工程学报, 2016, 35(11): 2197-2207.
FENG Wenkai，HU Yunpeng，XIE Jizun，WANG Qi，WU Gang. Disaster mechanism and stability analysis of shattered bedding slopes triggered by rainfall─a case study of Sanxicun landslide. , 2016, 35(11): 2197-2207.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2016.0420 或 https://rockmech.whrsm.ac.cn/CN/Y2016/V35/I11/2197

[1]	冯文凯，许强，黄润秋. 斜坡震裂变形力学机制初探[J]. 岩石力学与工程学报，2009，28(增1)：3 124-3 130.(FENG Wenkai，XU Qiang，HUANG Runqiu. Preliminary study on mechanical mechanism of slope earthquake-induced deformation[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(Supp.1)：3 124-3 130.(in Chinese))
[2]	WANG G H，SASSA K. Pore pressure generation and movement of rainfall induced landslides：effects of grain size and fine-particle content[J]. Engineering Geology，2003，69(1/2)：109-125. " target="_blank">
[3]	张珍，李世海，马力. 重庆地区滑坡与降雨关系的概率分析[J].岩石力学与工程学报，2005，24(17)：3 185-3 191.(ZHANG Zhen，LI Shihai，MA Li. Probability analysis of relationship between landslide and rainfall in Chongqing area[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(17)：3 185-3 191.(in Chinese))
[4]	戚国庆. 降雨诱发滑坡机制及其评价方法研究[博士学位论文][D]. 成都：成都理工大学，2004.(QI Guoqing. Study on the mechanics of rainfall induced landslide and its evaluating method[Ph. D. Thesis][D]. Chengdu：Chengdu University of Technology，2004.(in Chinese)) " target="_blank">
[5]	曾胜，李振存，韦慧，等. 降雨渗流及干湿循环作用下红砂岩顺层边坡稳定性分析[J]. 岩土力学，2013，34(6)：1 536-1 540. (ZENG Sheng，LI Zhencun，WEI Hui，et al. Stability analysis of red sandstone bedding slope under rainfall infiltration and dry-wet cycling[J]. Rock and Soil Mechanics，2013，34(6)：1 536-1 542.(in Chinese))
[6]	冯文凯，黄润秋，许强. 震裂斜坡机制及变形破坏模式研究[J]. 水文地质工程地质，2009，36(6)：42-84.(FENG Wenkai，HUANG Runqiu，XU Qiang. Study on formation mechanism and deformation failure models off hatter slopes[J]. Hydrogeology and Engineering Geology，2009，36(6)：42-84.(in Chinese)) " target="_blank">
[7]	冯文凯，黄润秋，许强. 强震波效应与山体斜坡震裂机制深入分析[J]. 西北地震学报，2011，33(1)：20-25.(FENG Wenkai，HUANG Runqiu，XU Qiang. Indepth analysis of seismic wave effect and slope shattered mechanism[J]. Northwestern Seismological Journal，2011，33(1)：20-25.(in Chinese)) " target="_blank">
[8]	左雅娅，冯文凯. 土质边坡震裂机制物理模拟研究[J]. 工程地质学报，2011，19(1)：21-28.(ZUO Yaya，FENG Wenkai. Physical simulation on genetic mechanism of rupture in soil slope under earthquake[J]. Journal of Engineering Geology，2011，19(1)：21-28.(in Chinese))
[9]	祁生文，伍法权，刘春玲，等. 地震边坡稳定性的工程地质分析[J]. 岩石力学与工程学报，2004，23(16)：2 792-2 797.(QI Shengwen，WU Faquan，LIU Chunling，et al. Engineering geology analysis on stability of slope under earthquake[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(16)：2 792-2 797.(in Chinese)) " target="_blank">
[10]	丁秀美. 西南地区复杂环境下典型堆积(填)体斜坡变形及稳定性研究[博士学位论文][D]. 成都：成都理工大学，2005.(DING Xiumei. A study on the deformation and stability of representative debris and embankment slope with complicated environment in Southwestern China[Ph. D. Thesis][D]. Chengdu：Chengdu University of Technology，2005.(in Chinese)) " target="_blank">
[11]	侯伟龙，巨能攀，屈科，等. 厚层堆积层震裂斜坡变形特征及破坏机制——以小金县某震裂不稳定斜坡为例[J]. 山地学报，2011，29(4)：493-498.(HOU Weilong，JU Nengpan，QU Ke，et al. Deformation characteristics and failure mechanism of shatter unstable slope of thick layer accumulative formation[J]. Journal of Mountain Science，2011，29(4)：493-498.(in Chinese)) " target="_blank">
[12]	YIN Y P，WANG F E，SUN P，landslide hazards triggered by the 2008 Wenchuan Ms 8.0 earthquake，Sichuan，China[J]. Landslides，2009，6(2)：139-152.
[13]	YIN Y P，CHENG Y N，LIANG J T. Heavy-rainfall-induced catastrophic rockslide-debris flow at Sanxicun，Dujiangyan，after the Wenchuan Ms 8.0 earthquake[J]. Landsliedes，2016，13(1)：9-23. " target="_blank">
[14]	范宣梅. 平推式滑坡成因机制与防治对策研究[硕士学位论文][D]. 成都：成都理工大学，2007.(FAN Xuanmei. Study on genetic mechanism of translational landslide[M. S. Thesis][D]. Chengdu：Chengdu University of Technology，2007.(in Chinese)) " target="_blank">
[15]	黄润秋，冯文凯. 汶川地震地质灾害研究[M]. 北京：科学出版社，2009：599-600.(HUANG Runqiu，FENG Wenkai. Geohazard assessment of the Wengchuan earthquake[M]. Beijing：Science Press，2009：599-600.(in Chinese)) " target="_blank">
[16]	刘汉香，许强，周飞，等. 含软弱夹层斜坡地震动力响应特性的振动台试验研究[J]. 岩石力学与工程学报，2015，34(5)：994-1 005. (LIU Hanxiang，XU Qiang，ZHOU Fei，et al. Shaking table test for seismic responses of slopes with a weak interlayer[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(5)：994- 1 005.(in Chinese))
[17]	张倬元，王士天，王兰生，等. 工程地质分析原理[M]. 北京：地质出版社，1994：312-315.(ZHANG Zhuoyuan，WANG Shitian，WANG Lansheng，et al. Engineering geology theory analysis[M]. Beijing：Geological Publishing House，1994：312-315.(in Chinese)) " target="_blank">
[18]	FENG W K，HUANG R Q，XU Q. Seismic response analysis of horizontal layer slope with soft and hard rock combination[J]. American Mineralogist，2011，90-93(1)：110-119. " target="_blank">
[19]	梁京涛，成余粮，王军，等. 2013年7月10日四川省都江堰三溪村五里坡特大滑坡灾害遥感调查及成因机制浅析[J]. 工程地质学报，2014，22(6)：1 194-1 203.(LIANG Jingtao，CHENG Yuliang，WANG Jun，et al. Remote sensing investigation and formation mecha?nism on wulipo landslide of July 10，2013 in Sanxi village，Dujiangyan，Sichuan Province[J]. Journal of Engineering Geology，2014，22(6)：1 194-1 203.(in Chinese))
[20]	傅晏. 干湿循环水岩相互作用下岩石劣化机制研究[博士学位论文][D]. 重庆：重庆大学，2010.(FU Yan. Study on water-rock interaction with the cyclic drying-wetting effect on rock[Ph. D. Thesis][D]. Chongqing：Chongqing University，2010.(in Chinese)) " target="_blank">
[21]	李守定，李晓，吴疆，等. 大型基岩顺层滑坡滑带形成演化过程与模式[J]. 岩石力学与工程学报，2007，26(12)：2 473-2 480.(LI Shouding，LI Xiao，WU Jiang，et al. Evolution process and pattern of sliding zone in large conse¬quent bedding rock landslide[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(12)：2 473- 2 480.(in Chinese))
[22]	宋琨，晏鄂川，毛伟，等. 广义Hoek-Brown准则中强度折减系数的确定[J]. 岩石力学与工程学报，2012，31(1)：106-112.(SONG Kun，YAN Echuan，MAO Wei，et al. Determination of shear strength reduction factor for generalized Hoek-Brown criterion[J]. Journal of Rock Mechanics and Engineering，2012，31(1)：106-112.(in Chinese))
[23]	薛雷，孙强，秦四清，等. 非均质边坡强度折减法折减范围研究[J]. 岩土工程学报，2011，33(2)：275-280.(XUE Lei，SUN Qiang，QIN Siqing，et al. Scope of strength reduction for inhomogeneous slopes[J]. Journal of Geotechnical Engineering，2011，33(2)：275-280.(in Chinese))
[24]	胡其志，周辉，肖本林，等. 水力作用下顺层岩质边坡稳定性分析[J]. 岩土力学，2010，31(11)：3 594-3 598.(HU Qizhi，ZHOU Hui，XIAO Benlin，et al. Analysis of stability of rock bedded slope under hydraulic pressure[J]. Rock and Soil Mechanics，2010，31(11)：3 594-3 598.(in Chinese))
[25]	曾胜，李振存，韦慧，等. 降雨渗流及干湿循环作用下红砂岩顺层边坡稳定性分析[J]. 岩土力学，2013，34(6)：1 536-1 540. (ZHENG Sheng，LI Zhencun，WEI Hui，et al. Stability analysis of red sandstone bedding slope under rainfall infiltration and wet dry cycle[J]. Rock and Soil Mechanics，2013，34(6)：1 536-1 540.(in Chinese))