某水电站左坝肩上方堆积体成因机制分析及稳定性评价

›› 2009, Vol. 30 ›› Issue (S2): 408-413.

某水电站左坝肩上方堆积体成因机制分析及稳定性评价

杨继红¹，董金玉^{1, 2}，刘汉东¹，黄志全¹，刘海宁¹

1.华北水利水电学院，郑州 450011；2.中国科学院地质与地球物理研究所工程地质力学重点实验室，北京 100029

收稿日期:2008-08-17 出版日期:2009-08-10 发布日期:2011-06-21
作者简介:杨继红，女，1976年生，博士，讲师，主要从事岩土工程和地质工程方面的教学和科研工作
基金资助:
中国科学院工程地质力学重点实验室开放基金资助项目；华北水利水电学院高层次人才引进项目

Analysis on formation mechanism and stability of deposits slope located above left dam abutment

YANG Ji-hong¹, DONG Jin-yu^{1, 2}, LIU Han-dong¹, HUANG Zhi-quan¹, LIU Hai-ning¹

1.North China University of Water Conservancy and Electric Power, Zhengzhou 450011, China; 2.Key laboratory of Engineering Geomechanics, Institute of Geology and Geophysics Chinese Academy of Sciences, Beijing 100029, China

Received:2008-08-17 Online:2009-08-10 Published:2011-06-21

摘要/Abstract

摘要： 针对国内西南水电工程建设中经常遇到的堆积体边坡问题，结合现场调查在地表看到的地质现象，以及钻孔岩芯资料，在分析区域地质环境、降雨等条件的基础上，对堆积体边坡的稳定性进行了宏观定性评价。在地质分析的基础上，指出该堆积体具有多期次复合成因的特征，是怒江峡谷岸坡演化的典型模式之一，并进一步提出了该堆积体成因机制的内外动力耦合作用模式。由于该堆积体边坡特殊的空间结构特征和其处于重要工程部位的特点，采用有限差分强度折减法对边坡在天然状态、暴雨、地震等工况下的稳定性进行了分析评价，为工程建设的顺利进行和暴雨等工况下可能的局部加固处理提供合理的依据，并为流域内类似成因和结构的堆积体边坡稳定性评价提供参考

关键词: 堆积体边坡, 多期次复合成因, 内外动力耦合作用, 有限差分强度折减法

Abstract: The problem of deposits slope is often encountered in constructions of hydropower projects in Southwest China. The study combines geology phenomena and drill core data, based on areal geology survey, rainfall data, and so on. The thought of engineering geology qualitative analysis is applied to study on the slope stability. On the basis of geological analysis, the deposits body has the feature of multi-stages and composite formation mechanism, and it is one of typical evolution models of the bank slope of Nujiang Great Canyon. The coupling effect mechanism of endogenic and exogenic geological processes of the deposits body is proposed. Aiming at spatial structure features and special location of deposits slope, the finite-difference and strength-reduction method is adopted to compute its stability factors under natural, rainstorm, seismic conditions. The above discussions offer reasonable evidence to constructions of the project and partial reinforcements of the slope and provide reference for stability analysis of similar deposits slopes in the river basins.

Key words: deposits slope, multi-stages and composite formation mechanism, coupling effect mechanism of endogenic and exogenic geological processes, finite-difference and strength-reduction method

中图分类号:

TV 223

杨继红，董金玉，刘汉东，黄志全，刘海宁. 某水电站左坝肩上方堆积体成因机制分析及稳定性评价[J]. , 2009, 30(S2): 408-413.

YANG Ji-hong , DONG Jin-yu , LIU Han-dong , HUANG Zhi-quan , LIU Hai-ning. Analysis on formation mechanism and stability of deposits slope located above left dam abutment[J]. , 2009, 30(S2): 408-413.

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