万州天生城危岩体成因分析及稳定性评价

根据勘探钻孔资料，对万州天生城一带危岩体的特征及成因进行了详细的分析，结果表明：天生城危岩体的形成主要受裂隙，软弱层以及卸荷带的控制，强发育区主要分布在第一级陡崖南段，长450m，选取南侧陡崖段典型危岩体进行了稳定性计算，计算结果表明危岩体在暴雨作用下稳定性明显降低，南段危岩的治理是整个天生城危岩带治理的重中之重。

Mechanism analysis and stability assessment of natural city unstable rock mass in Wanzhou

The paper firstly discusses the characteristics and mechanism of natural city unstable rock mass in Wanzhou based on the material of boreholes. The results show that the formation of unstable rock mass is controlled by fissures, weak layers and unloading zone, the strong development zone mainly located in the southern section of the first-class cliffs with 450 meters long. It calculates the stability based on the typical unstable rock mass of south cliffs. The results show that the stability descends sharply under the rainstorm and the southern unstable rock must be the most important point of the whole natural city zone to prevent.