Study on instability mechanism of shallow landslide caused by typhoon and heavy rain
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摘要:
针对台风暴雨耦合作用下浅层滑坡的失稳机理进行研究。在总结福建台风暴雨型滑坡灾害特征的基础上，提出风荷载对斜坡变形失稳的影响机理是通过植被造成坡体开裂，从而影响坡体的入渗规律。应用GeoStudio软件计算台风暴雨入渗条件下裂隙坡体中暂态非饱和渗流场的变化，以及对斜坡稳定性的影响。计算结果表明：裂隙坡体由于在裂隙处形成集中入渗点，雨水的入渗速度大于无裂隙的坡体，坡体达到饱和状态所需要的时间大为缩短。裂隙深度、间距对滑坡稳定系数的影响较大，裂隙深度越大、间距越小，在相同的降雨条件下滑坡的稳定系数越小，滑坡失稳需要的降雨时长越短。裂隙宽度对滑坡稳定性的影响相对较小。
Abstract:The instability mechanism of shallow landslide under the coupling of typhoon and heavy rain is studied. On the basis of summarizing the disaster characteristics of landslides caused by typhoon and heavy rain in Fujian, it is proposed that the influence mechanism of wind load on slope deformation and instability is that the slope body is cracked by vegetation, which affects the slope infiltration law. GeoStudio software was used to calculate the changes of transient unsaturated seepage field in the cracked slope body under the condition of typhoon storm infiltration, and to study the effect on the slope stability. The calculation results show that, due to the formation of concentrated infiltration points at the cracks, the infiltration rate of rainwater is greater than that of the unslitted slopes, and the time required for the slopes to reach saturation is greatly shortened. The depth and spacing of cracks have a greater impact on the stability coefficient of landslides. The greater the depth of cracks and the smaller the spacing, the smaller the stability coefficient of the landslide under the same rainfall conditions, and the shorter the rainfall duration required for landslide instability. The effect of crack width on landslide stability is relatively small.
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Key words:
- typhoon /
- heavy rain /
- cracked slope /
- rainfall infiltration /
- stability coefficient
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表 1 台风登陆与灾害体失稳时间对比表
Table 1. Comparison table of typhoon landing and disaster instability time
台风编号 登陆时间 结束时间 地灾主要
失稳时间所占
比例/%“苏力”台风 7月13日16时 7月14日5时 7月14日0—5时 87.5 “西马伦”台风 7月18日21时 7月19日2时 7月19日0—2时 95.2 
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表 2 岩土体计算参数表
Table 2. Calculation parameter table of the rock and mass
岩土体类型 容重/(kN·m-3) 内聚力/kPa 内摩擦角/(°) 土体 19 13 18 岩体 23 200 36
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表 3 不同裂缝深度的斜坡失稳时降雨时间表
Table 3. Rainfall schedule when slopes with different crack depths are unstable
裂缝深度/m 0 0.3 0.5 1 1.3 失稳时降雨时间/h 24 22 21 19 17
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CHEN G P.2011. Study on distribution characteristics and influencing factors of slope geological hazard induced by typhoon in Wenzhou[D]. Chengdu: Chengdu University of Technology. (in Chinese with English abstract)
CHI Y X.2015. Study on the process of hydrological response and stability analysis of landslide body in typhoon rainstorm[J]. Journal of Anhui Agricultural Sciences, 43(19):176-180, 294. (in Chinese with English abstract) http://cn.bing.com/academic/profile?id=8d9706d0e24a44eaf55078e87355a1bb&encoded=0&v=paper_preview&mkt=zh-cn
CHI Y X, CHEN F.2017. Influencing factor analysis of landslide stability in typhoon rainstorm[J]. Journal of Geology, 41(2):297-304. (in Chinese with English abstract)
CUI P, CHEN S Q, SU F H, et al., 2010. Formation and mitigation countermeasure of geo-hazards caused by Moarc Typhoon in Taiwan[J]. Journal of Mountain Science, 28(1):103-115. (in Chinese with English abstract) http://cn.bing.com/academic/profile?id=64dfa82149321993afe5e913f852c954&encoded=0&v=paper_preview&mkt=zh-cn
CUI X, YUAN L X, LU Y J.2010. Mechanism of typhoon-induced landslide hazards[J]. Journal of Natural Disasters, 19(2):80-84. (in Chinese with English abstract) http://cn.bing.com/academic/profile?id=f75eaf7684e6b7d71444ebbf49db9cd9&encoded=0&v=paper_preview&mkt=zh-cn
HAN J.2012. Physical simulation in study on the formation mechanism of typhoon landslide in Wenzhou region[D]. Chengdu: Chengdu University of Technology. (in Chinese)
HAN J, ZHAO Q H, HAN G, et al., 2012. Influence factors of typhoon-triggered slope hazards in Wenzhou[J]. Journal of Geological Hazards and Environment Preservation, 23(1):30-34. (in Chinese with English abstract)
HUANG J B, WANG G M, LIU H N, et al., 2015. Study on Monitoring Technology and Early Warning Criteria of Landslides and Debris Flows Induced by the Typhoon and Rain[R]. Fujian Center of Geo-Environmental Monitoring. (in Chinese)
KONG W W, ZHAO Q H, HAN J, et al., 2013. Model experiments for deformation and failure mechanism of typhoon induced landslide[J]. Journal of Engineering Geology, 21(2):297-303. (in Chinese with English abstract) http://cn.bing.com/academic/profile?id=baa07bd9d700c5cf811ac4712ee397ee&encoded=0&v=paper_preview&mkt=zh-cn
LI H R, ZHANG P, WANG S N, et al., 2018. A study of the influence of rainfall on slope stability along the tendency of coal measure strata[J]. Journal of Geomechanics, 24(6):836-848. (in Chinese with English abstract)
LIN X W, JIAN W B, DONG Y S, et al., 2014. Analysis of seepage stability of a landslide in Fujian under typhoon storm condition[J]. Journal of Water Resources and Architectural Engineering, 12(5):66-72. (in Chinese with English abstract)
LIN X W, JIAN W B, DONG Y S, et al., 2015. Analysis on seepage and stability characteristics of Xiabi landslide in Fujian under typhoon rainstorm conditions[J]. Subgrade Engineering(2):36-41. (in Chinese with English abstract) http://cn.bing.com/academic/profile?id=631cf788c9a9fef749e7b6e3874e0cfe&encoded=0&v=paper_preview&mkt=zh-cn
LIU A M, HUANG Z G, GAO S, et al., 2008. Analysis on characteristics of geological hazard induced by tropical cyclone rainfall in Fujian[J]. Journal of Catastrophology, 23(4):45-48, 53. (in Chinese with English abstract)
LIU L L, YIN K L.2008. Analysis of rainfall infiltration mechanism of rainstorm landslide[J]. Rock and Soil Mechanics, 29(4):1061-1066. (in Chinese with English abstract) http://cn.bing.com/academic/profile?id=93b8238c9db92f0862787fb74d656b50&encoded=0&v=paper_preview&mkt=zh-cn
LU S J, WANG Y, WEN M Z.2010. Research on geological disasters caused by monsoon rainstorm and typhoon rainstorm in Fujian province[J]. Geology of Fujian, 29(S1):77-86. (in Chinese with English abstract)
PENG S Q, CHEN M D.2005. Mechanism analysis of landslide in Zhangxi which was mainly caused by typhoon[J]. Journal of Mountain Science, 23(6):725-728. (in Chinese with English abstract) http://cn.bing.com/academic/profile?id=626cf87e101df24ad208585a39ab4941&encoded=0&v=paper_preview&mkt=zh-cn
TANG X H.2011. Research on the geology disaster origin under typhoon rainstorm condition[J]. Fujian Architecture and Construction(2):64-66. (in Chinese with English abstract)
WANG Z C.2014. Study on the effect of vegetation on stability under the wind load[D]. Chengdu: Chengdu University of Technology. (in Chinese)
WANG Z C, ZHAO Q H, HAN J, et al., 2014. Physical modeling of the effect of vegetation on slope stability under typhoon[J]. Journal of Natural Disasters, 22(4):145-152. (in Chinese with English abstract) http://cn.bing.com/academic/profile?id=c2888bf6fd7cdac7bd95b19bfeecde82&encoded=0&v=paper_preview&mkt=zh-cn
WU Z X, YANG J, QIU T Q, et al., 2018. Application of the random field method based on FELA in the analysis of slope excavation stability considering rainfall infiltration[J]. Journal of Geomechanics, 24(6):813-821. (in Chinese with English abstract)
XU J, JIANG Y H, WEI F Q, et al., 2008. Susceptibility analysis of geologic hazards in landfall typhoon-affected areas in China[J]. The Chinese Journal of Geological Hazard and Control, 19(4):61-66. (in Chinese with English abstract) http://cn.bing.com/academic/profile?id=400ede73e5bf41cc327e1f8f4f7689bd&encoded=0&v=paper_preview&mkt=zh-cn
XU J, LI W H.2009. Characteristics of rainfall for typhoon rainstorm induced geological hazards[J]. Meteorological Monthly, 35(8):42-48. (in Chinese with English abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-QXXX200908004.htm
ZHANG T L, ZHOU A G, SHI B, et al., 2016. Physical experiment research on landslide deformation characteristics under the condition of the typhoon heavy rain[J]. Hydrogeology and Engineering Geology, 43(6):127-132. (in Chinese with English abstract)
ZHANG T L, ZHOU A G, SUN Q, et al., 2017. Characteristics of the groundwater seepage and failure mechanisms of landslide induced by typhoon rainstorm[J]. Earth Science, 42(12):2354-2362. (in Chinese with English abstract)
ZHUANG X C, ZHUANG S S.1995. Research on the characteristics of heavy rain in Fujian[J]. Hydraulic Science and Technology(3):44-49. (in Chinese)
陈光平.2011.台风引发温州市斜坡地质灾害的发育分布及影响因素研究[D].成都: 成都理工大学.
池永翔.2015.台风暴雨条件下滑坡水文响应过程及稳定性分析[J].安徽农业科学, 43(19):176-180, 294. doi: 10.3969/j.issn.0517-6611.2015.19.065
池永翔, 陈凡.2017.台风暴雨条件下滑坡稳定性影响因素分析[J].地质学刊, 41(2):297-304. doi: 10.3969/j.issn.1674-3636.2017.02.020
崔鹏, 陈树群, 苏凤环, 等.2010.台湾"莫拉克"台风诱发山地灾害成因与启示[J].山地学报, 28(1):103-115.
崔星, 袁丽侠, 陆彦俊.2010.台风诱发滑坡灾害的机理[J].自然灾害学报, 19(2):80-84.
韩俊.2012.温州地区台风滑坡形成机理物理模拟研究[D].成都: 成都理工大学.
韩俊, 赵其华, 韩刚, 等.2012.温州市台风引发斜坡地质灾害影响因子分析[J].地质灾害与环境保护, 23(1):30-34. doi: 10.3969/j.issn.1006-4362.2012.01.006
黄俊宝, 王国民, 刘海宁, 等.2015.台风暴雨型滑坡泥石流监测技术及早期预警判据研究[R].福建省地质环境监测中心.
孔维伟, 赵其华, 韩俊, 等.2013.台风滑坡变形破坏机制模型试验研究[J].工程地质学报, 21(2):297-303. doi: 10.3969/j.issn.1004-9665.2013.02.016
李宏儒, 张盼, 王神尼, 等.2018.降雨条件下顺倾向煤系地层边坡稳定性的影响研究[J].地质力学学报, 24(6):836-848.
林兴旺, 简文彬, 董岩松, 等.2014.台风暴雨条件下福建某滑坡体的渗流稳定性分析[J].水利与建筑工程学报, 12(5):66-72. doi: 10.3969/j.issn.1672-1144.2014.05.013
林兴旺, 简文彬, 董岩松, 等.2015.台风暴雨条件下福建霞碧滑坡渗流稳定性分析[J].路基工程(2):36-41. doi: 10.13379/j.issn.1003-8825.2015.02.08
刘爱鸣, 黄志刚, 高珊, 等.2008.福建省热带气旋暴雨型地质灾害特征分析[J].灾害学, 23(4):45-48, 53. doi: 10.3969/j.issn.1000-811X.2008.04.010
刘礼领, 殷坤龙.2008.暴雨型滑坡降水入渗机理分析[J].岩土力学, 29(4):1061-1066. doi: 10.3969/j.issn.1000-7598.2008.04.039
鹿世瑾, 王岩, 文明章.2010.福建雨季暴雨及台风暴雨诱发地质灾害的研究[J].福建地质, 29(S1):77-86. doi: 10.3969/j.issn.1001-3970.2010.z1.014
彭社琴, 陈明东.2005.张溪滑坡:台风诱发滑坡成因分析[J].山地学报, 23(6):725-728.
唐新华.2011.台风暴雨条件下地质灾害的成因研究[J].福建建筑(2):64-66.
王照财.2014.风荷载作用下植被对边坡稳定性影响研究[D].成都理工大学.
王照财, 赵其华, 韩俊, 等.2014.台风作用下植被对斜坡稳定性影响的物理模拟[J].自然灾害学报, 22(4):145-152.
吴志轩, 杨军, 邱天琦, 等.2018.基于FELA的随机场方法在考虑降雨入渗的边坡开挖稳定性分析中的应用[J].地质力学学报, 24(6):813-821.
徐晶, 江玉红, 韦方强, 等.2008.我国登陆台风影响区地质灾害易发性分析[J].中国地质灾害与防治学报, 19(4):61-66. doi: 10.3969/j.issn.1003-8035.2008.04.013
徐晶, 李伟华.2009.台风强降雨诱发地质灾害的雨量特征分析[J].气象, 35(8):42-48. doi: 10.7519/j.issn.1000-0526.2009.8.005
张泰丽, 周爱国, 施斌, 等.2016.台风暴雨条件下滑坡变形特征物理试验研究[J].水文地质工程地质, 43(6):127-132. doi: 10.16030/j.cnki.issn.1000-3665.2016.06.20
张泰丽, 周爱国, 孙强, 等.2017.台风暴雨条件下滑坡地下水渗流特征及成因机制[J].地球科学, 42(12):2354-2362. doi: 10.3799/dqkx.2017.570
庄希澄, 庄圣森.1995.福建暴雨特性研究[J].水利科技(3):44-49.
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