摘要
断裂是块状硬质岩体坝基的"硬伤",历来受到工程界的关注.本文根据几个水电站工程的勘察、研究成果,并参考相关文献资料,对块状硬质岩体的断裂特征、断裂构造岩的工程特性、坝基构造岩的利用与处理进行了总结与分析.断裂的力学性质、形成时代、后期改造情况不同,构造岩表现出的工程地质特性差异较大.块状硬质岩体中,一般胶结较好的构造岩多属于中硬岩,胶结较差或软弱的构造岩属于软岩类.根据断裂构造岩的具体特征可采取避让或降低风险、直接利用或经处理后利用.
Fault is the "main defects" of massive hard rock dam foundation, which has always been concerned by engineers.Based on the investigation and research results of several hydropower station projects and refer-ences, this paper summarizes and analyzes the fault characteristics of massive hard rock mass, the engineering characteristics of tectonites, and the utilization and treatment of tectonites in dam foundation.The engineering geological characteristics of tectonites vary greatly with the mechanical properties of faults, the ages of forma-tion and the conditions of post-reconstruction.Generally, tectonite with good cementation belongs to middle hard rock, while tectonite with poor cementation or weakness belongs to soft rock.According to the specific characteristics of tectonites, it can be taken to avoid or reduce the risk, use directly or after treatment.
作者
张丙先
Zhang Bingxian(Changjiang Geotechnical Engineering Corporation,Wuhan 430010,China)
出处
《三峡大学学报（自然科学版）》
CAS
北大核心
2019年第S01期20-24,共5页
Journal of China Three Gorges University：Natural Sciences
关键词
断裂
构造岩
块状硬质岩体
坝基
fault
tectonite
massive hard rock mass
dam foundation
