DEFORMATION AND, INSTABILITY CHARACTERISTICS, AND PREVENTION, AND TREATMENT, OF THE, DANGEROUS ROCK, MASS IN, WUXIA GORGE, IN THREE, GORGES RESERVOIR

The geological conditions in the Three Gorges Reservoir area of the Yangtze River are complicated. The main distribution strata of the Wuxia Gorge narrows in Wushan County are the Triassic Daye Formation and the Jialingjiang Formation limestone, in which the north bank of the Yangtze River is dominated by the anti-dip rocky reservoir bank. In the long geological history of the evolutionary process, a number of bank slopes and dangerous rocks of poor stability have been formed, resulting in further deterioration of the stability of the Three Gorges reservoir after impoundment. On November 23, 2008(two months after the 175m experimental impoundment of the Three Gorges Reservoir), 380000m3 dangerous rock at Gongjiafang collapsed, generating a surge with a height of 13m, which was a serious threat to the safety of the Yangtze River channel. Wuxia Gorge is characterized by large terrain height difference, steep slope, large scale of the potential landslide body and difficult to control. Based on the study of the deformation and instability characteristics of a section of the dangerous rock mass between Gongjiafang and Dulong on the north bank of the Wuxia River, the prevention and control measures of the reservoir bank of poor stability were researched and discussed, providing a certain reference value for the comprehensive improvement of the dangerous rock slope.