长江三峡巴东断裂地质特征及数值模拟分析 Geological Characteristics and Numeric…

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长江三峡巴东断裂地质特征及数值模拟分析

Geological Characteristics and Numerical Simulation of Badong Fault in TGP Reservoir Area

The new county-seat town of Badong in the reservoir area of the Three Gorges Project is located on a huge arcuate slope with a convex bank toward north. The slope is cut by a fault, Badong fault, trending in east-west in its back part. It is concerned if the huge arcuate slope is related to mass rock creep, and what is the role of the Badong fault in the formation of the huge arc slope? The Badong fault was put into main consideration in this paper. The data from field investigation were reviewed. Three main features of the Badong fault were summarized: a bedding fault between the Jialingjiang formation (T\-1j) and Badong formation (T\-2b), breccias with compound component, and multiple stages of activity. It was proposed that most of the breccias were formed by fracture-filling. To understand the state of stress and behavior of deformation of the fault during the incision of the Yangtze River as well as the initiation and development of the slope, numerical simulation was conducted. Results indicate that there is a tensional stress zone in the upper part of the fault, and that activity of the fault is dominated by bedding sliding. Opening was also noted in the upper part of the fault in the late periods. The results are consistent with the field observation of the fault. The displacement in the slope is small, which makes us conclude that there is no certain relation between the formation of the arcuate slope and the Badong fault.水利论文T b9g*[ y3Ux x

作 者:邓清禄 陈波 DENG Qing-lu CHEN Bo  
作者单位:邓清禄,DENG Qing-lu(Professor, Yangtze Geotechnique and Survey Research Institute, Ministry of Water Resources, Wuhan 430011, China)
.u(B xTs-i(m,f#? P}0陈波,CHEN Bo(Vice-Professor, Tianjing University, Tianjing 300072, China) 
刊 名:人民长江  PKU
英文刊名:YANGTZE RIVER 
年,卷(期):2002 33(z1) 
分类号:TV 
关键词:fault   slope   numerical simulating   Three Gorges Project   Yangtze River  
机标关键词:长江三峡巴东断裂地质特征数值模拟分析Three Gorges Projectthe Yangtze Riverfield observation 
基金项目: 
TAG: Geological geological 巴东 长江三峡 数值模拟 Numeric
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