蓄水后库岸堆积体边坡变形特征及其稳定性分析

doi:10.13278/j.cnki.jjuese.20180179

摘要/Abstract

摘要： 水库蓄水极易诱发库区地质灾害，所以研究水库库岸堆积体边坡在蓄水前后的变形特征及其稳定性具有重要意义。本文基于现场详细的工程地质勘察资料和监测资料，分析了堆积体边坡的结构特征和变形特征；在此基础上，对堆积体的形成和变形机制进行了探讨；最后，采用离散元数值计算方法，对堆积体边坡在蓄水前后的稳定性进行了计算分析。研究结果表明：堆积体形成于古滑坡，水库在短时间（两个月）内大幅度抬高水位近40.00 m，从而激活了古滑坡，导致变形的产生；排水洞和排水孔的施工有效降低了坡体内地下水位，有效减缓了变形的发展，部分测点变形有收敛趋势，但仍需进一步观测。

关键词: 堆积体边坡, 变形特征, 变形机理, 稳定性

Abstract: A geological disaster induced by reservoir impoundment is common. It is important to study the characteristics and stability of deposit slope at reservoir bank before and after impoundment for prevention of such a disaster. Based on the in-situ detailed engineering geological investigation and monitoring materials, the structural and deformation characteristics of deposit slope were analyzed, and the formation and deformation mechanisms were discussed in this study. Finally, based on the discrete element method, the stability of this slope was evaluated. Based on the above research results, the deposit slope was formed from the ancient slide, and the reservoir water level raised by nearly 40m in two months, thus activating the ancient landslides and resulting in the deformation. The engineering treatment such as drainage tunnels and drainage holes slow down the deformation of the slope dramatically, and the deformation of some observation points has a convergence trend.

Key words: deposit slope, deformation character, deformation mechanism, stability

中图分类号:

TU45

唐军峰, 唐雪梅, 曾向农, 杨军, 李学政. 蓄水后库岸堆积体边坡变形特征及其稳定性分析[J]. 吉林大学学报(地球科学版), 2018, 48(5): 1546-1555.

Tang Junfeng, Tang Xuemei, Zeng Xiangnong, Yang Jun, Li Xuezheng. Deformation Characteristics and Stability Analysis of Deposit Slope After Initial Impoundment[J]. Journal of Jilin University(Earth Science Edition), 2018, 48(5): 1546-1555.

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