| 浙江省玄武岩台地稳定性评价:以嵊州市地雅园滑坡为例 |
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| 引用本文： | 张俞,徐兴华,卢琰萍,冯杭建,唐小明,殷坤龙.浙江省玄武岩台地稳定性评价:以嵊州市地雅园滑坡为例[J].地质科技通报,2021,40(2):99-110. |
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| 作者姓名： | 张俞 徐兴华 卢琰萍 冯杭建 唐小明 殷坤龙 |
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| 作者单位： | 浙江省地矿科技有限公司;浙江省地质矿产研究所;嵊州市自然资源和规划局;中国地质大学（武汉）工程学院 |
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| 基金项目： | 浙江省基础公益研究计划“降雨引发玄武岩台地滑坡之灾变效应及动态防灾控制”LGF21D020001中央自然灾害防治体系建设补助资金科研项目“浙江省地质灾害防范区管控示范” |
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| 摘 要： | 玄武岩台地型滑坡是一种特殊的滑坡类型,此前对其稳定性的研究较少。以嵊州市地雅园滑坡为研究对象,采用三维数值模拟的方法进行了稳定性分析评价,首先基于详细的地质资料采用三维模拟软件进行了建模;然后基于P-Ⅲ型分布曲线确定了降雨重现期,分别采用岩土软件MIDAS进行了滑坡稳定性模拟与三维运动模拟平台DAN3D软件进行了滑坡影响范围计算;最后对影响地雅园滑坡稳定性的因子进行了敏感性分析。结果表明:不同降雨强度对地雅园滑坡稳定性的影响不同,最不利工况为百年一遇降雨工况,此时滑坡稳定性系数为0.946,破坏概率为65.25%,影响范围最大增加了36.83%;内摩擦角和降雨是影响地雅园滑坡稳定性的主要因子。分析原因认为玄武岩台地型滑坡稳定性主要与硅藻土滑带、节理裂隙面的发育情况、降雨入渗滞后性有明显的相关性。本研究成果可为同类滑坡稳定性评价提供参考依据。
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| 关 键 词： | 玄武岩台地 三维建模 降雨作用 滑坡稳定性 影响范围 |
| 收稿时间： | 2020-03-02 |
Stability evaluation of basalt platform in Zhejiang Province: A case study of Diyayuan landslide in Shengzhou City |
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| Zhang Yu,Xu Xinghua,Lu Yanping,Feng Hangjian,Tang Xiaoming,Yin Kunlong.Stability evaluation of basalt platform in Zhejiang Province: A case study of Diyayuan landslide in Shengzhou City[J].Bulletin of Geological Science and Technology,2021,40(2):99-110. |
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| Authors: | Zhang Yu Xu Xinghua Lu Yanping Feng Hangjian Tang Xiaoming Yin Kunlong |
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| Affiliation: | (Zhejiang Geology and Mineral Technology Co.Ltd.,Hangzhou 310007,China;Zhejiang Institute of Geology and Mineral Resources,Hangzhou 310007,China;Shengzhou Natural Resources and Planning Bureau,Shengzhou Zhejiang 312400,China;School of Engineering,China University of Geosciences(Wuhan),Wuhan 430074,China) |
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| Abstract: | Basalt platform is a special type of landslide, however, its stability has received little attention before.This paper takes the Diyayuan landslide in Shengzhou city as the research object, and uses the method of three-dimensional numerical simulation to analyze and evaluate its stability.Then the rainfall recurrence period was determined based on the P-Ⅲ distribution curve, and the geotechnical software MIDAS was used to simulate the landslide stability and the 3D motion simulation platform DAN3D software was used to calculate the landslide impact range; finally, sensitivity analysis was carried out for the stability factors affecting the landslide The results show that different rainfall intensity has great influence on the stability of Diyayuan landslide.At this time, the stability coefficient of landslide is 0.946, the failure probability is 65.25%, and the maximum impact range increases by 36.83%; the angle of internal friction and rainfall are the main factors affecting the stability of Diyayuan landslide The analysis shows that the stability of basalt platform landslide is obviously correlated with the development of diatomite slip zone, joint and fissure surface, and the hysteresis of rainfall infiltration.The results of this paper can provide reference for the stability evaluation of similar landslide. |
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| Keywords: | basalt platform 3D-modeling rainfall landslide stability scope of influence |
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