| 基于堆积层厚度变化的侏罗系顺向岸坡变形机制转换研究 |
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| 引用本文： | 张全,黄波林,陈小婷,王健.基于堆积层厚度变化的侏罗系顺向岸坡变形机制转换研究[J].华南地质与矿产,2019,35(3):354-360. |
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| 作者姓名： | 张全 黄波林 陈小婷 王健 |
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| 作者单位： | 三峡大学防灾减灾湖北省重点实验室,湖北宜昌,443002;三峡大学防灾减灾湖北省重点实验室,湖北宜昌,443002;三峡大学防灾减灾湖北省重点实验室,湖北宜昌,443002;三峡大学防灾减灾湖北省重点实验室,湖北宜昌,443002 |
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| 基金项目： | 2018YFC1504803);中国地质调查局项目;三峡后续工作地质灾害防治项目;三峡后续地质灾害防治规划专项资金 |
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| 摘 要： | 三峡库区侏罗系顺向岸坡堆积体滑坡众多,其滑动模式存在一定差异。首先统计分析了192个三峡库区侏罗系层位发育的堆积体滑坡滑体及碎石土的工程地质性质和强度参数。在此基础上,运用数值分析软件对堆积体厚度变化引起的滑坡变形机制进行模拟分析。结果表明:堆积体厚度范围在15m及以下滑坡会沿着岩土界线面滑动、15~35m时滑坡会沿着层内剪切面滑动;厚度范围在35m以上时,堆积体滑坡内部可能存在着多层滑带,即滑坡可能沿着层内剪切面滑动或者沿着岩土界线面滑动。堆积体厚度范围在15m及以下时滑坡的治理措施可采用布置抗滑桩;厚度范围15~35m时可采用排水+布置抗滑桩的滑坡治理措施;厚度范围在35m以上时,可采用滑坡前期监测预报+后期根据滑坡发育情况相结合的滑坡防治措施。
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| 关 键 词： | 数值模拟 滑动模式 变形机制 侏罗系 堆积体滑坡 三峡库区 |
Research on Deformation Mechanism Transformation of Jurassic Consequent Bank Slope Based on Thickness Variation of Deposition Layer |
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| ZHANG Quan,HUANG Bo-Lin,CHEN Xiao-Ting,WANG Jian.Research on Deformation Mechanism Transformation of Jurassic Consequent Bank Slope Based on Thickness Variation of Deposition Layer[J].Geology and Mineral Resources of South China,2019,35(3):354-360. |
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| Authors: | ZHANG Quan HUANG Bo-Lin CHEN Xiao-Ting WANG Jian |
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| Institution: | (Hubei Key Laboratory of Disaster Prevention and Mitigation, China Three Gorges University, Yichang 443002, Hubei, China;National Field Observation and Research Station of Landslides in the Three Gorges Reservoir Area of Yangtze River, China Three Gorges University, Yichang 443002, Hubei, China) |
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| Abstract: | There are many depositional body landslides in Jurassic downstream bank slope in the Three Gorges Reservoir area, and their sliding modes are different to some extent. Firstly, the engineering geological properties and strength parameters of 192 accumulative landslide or rubble soil developed in Jurassic strata in the Three Gorges Reservoir area were analyzed. On this basis, the numerical analysis software is used to numerically simulate the landslide series calculation model of the thickness variation of the deposit. The results show that the landslide with the thickness of the deposit of 15 m or less will slide along the geotechnical boundary plane;15-35 m, the landslide will slide along the shear plane in the layer;when the thickness is above 35 m, there may be multiple layers of slip zone inside the landslide, that is, the landslide may slide along the shear plane in the layer or slide along the boundary of the rock and soil. When the thickness of the accumulation body is 15 m or below, anti-slide piles can be used for the treatment of landslide. When the thickness ranges 15-35 m, the landslide treatment measures of drainage + anti-slide piles can be adopted.When the thickness range is more than 35 m, landslide prevention and control measures combining landslide monitoring and prediction in the early stage and landslide development in the later stage can be adopted. |
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| Keywords: | numerical simulation sliding pattern deformation mechanism Jurassic System deposition landslide the Three Gorges Reservoir area |
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