湖北省巴东县东壤口新镇址库岸稳定性分析与评价

STABILITY ANALYSIS AND EVALUATION OF THE THREE GORGES RESERVOIR BANK ALONG WU GORGE AND XILING GORGE IN BADONG COUNTY,HUBEI PROVINCE

巴东县东壤口新镇址,岸坡高陡且多为顺向坡,在三峡水库蓄水以后,本段库岸产生严重的库岸再造。通过传递系数法(推力传递法)计算滑坡稳定性,水位变化是导致岸坡稳定性恶化的主因。

Xinzhenzhi water reservoir in Badong county of Hubei province has a total bank length about 600m long at the north side of the Changjiang River. The reservoir bank appears high steep and dip slope featured in weak rock mass, heavy weathering and poor stability. Severe reservoir bank reconstruction in this portion would occur while water impounding of the Three Gorges Reservoir. According, to the characteristics of engineering geology at the bank slope, investigation of a regional environment and geological conditions has been made for analysis of the failure mode in the bank slope and calculation of the landslide stability by means of transfer coefficient （ thrust transfer method）, indicating that the primary reason deteriorating the stability of the band slope is water level changes. Even the bank slope is stable at present, it might be poor in stability because of water impounding in the reservoir which would cause severe reservoir bank reconstruction by hydrodynamic actions.