四川省内江市东兴区地质灾害的特征、成因及防治对策

THE FEATURES AND MECHANISM OF GEOLOGIC HAZARDS AND CONTROL MEASURES IN DONGXING DISTRICT OF NEI JIANG,SICHUAN PROVINCE

东兴区地质灾害发育广泛,以崩塌(危岩)、滑坡和不稳定斜坡(高陡边坡)为主。其宏观发育特征有明显的分区性和季节性;灾害规模不大,但是影响人群较多,危害较大。崩塌(危岩)分布最为广泛,其主要受控因素是为水平状砂泥岩互层的差异性风化;滑坡和不稳定斜坡(高陡边坡)分布较少,降雨入渗和人工开挖坡脚是造成灾害的直接原因。在查明地质灾害成因机制和影响因素后,对不同类型地质灾害采取人工清除、填沟摸缝、砌支撑柱(墙)、避让搬迁等有针对性的措施,以达到切实可行而且经济的目的。

The geologic hazards distribute widely in Dongxing district, including the rock avalanche, unstable slope and land slide. Taking place of the hazards is relative to some area and to the seasons. The scales of the hazards are generally small, but their damage is heavy. The avalanche of rock is distributed most wildly ,and controlled by the differential weathering of horizontal alternate layers of sandstone and mudstone. The unstable slop and the land slide are distributed narrowly, and controlled by the precipitation and artificial cutting directly. After analyzing the mechanism and influential elements of geologic hazards, this paper suggests that it should take appropriate measuers, such as artificial elimination, packing seam, building brace column cap（wall） and avoiding, to control hazards, and in order to reaching the goal of feasibility and economization.