摘要
剪切带作为一种特殊的软弱结构面,对工程建设的危害早已引起人们的广泛关注和深刻认识.古贤水利枢纽坝址区剪切带具有地质形成历史长、岩体组合结构复杂、延展规模大等特点.从坝基岩性组合、物质基础、沉积构造等角度,结合区域地质构造背景,综合分析坝址区剪切带发育规律与空间分布特征.研究结果表明:坝址区岩体中共分布有12层主要剪切带,其中左岸坝肩部位2层,河床坝基部位10层;每一层的分布概率变化较大,其中对坝基稳定性影响最大的剪切带为JQD06.通过对剪切带空间发育分布规律的研究,可用于指导红层地区工程地质条件评价与坝基岩体稳定性分析.
As a kind of special weak plane, shear zone has aroused attention and understanding of the influence on engineering construction. Shear zone of Guxian hydro-junction has some typical characteristics: long geological history, complex rock mass structure and large-scale spread. From the perspective of lithologic combination, material foundation, sedimentary structure of the dam and comprehensive analysis of development law and spatial distribution characteristics of the shear zone, it’s noted in the paper that there are 12 layers of main shear zones in the rock mass of the dam site, including layers at the shoulder of the left bank and 10 layers at the base of the riverbed. The distribution probability of each layer varies greatly, and the shear zone JQD06 has the greatest influence on the stability of the dam foundation. The study on the spatial distribution of shear zone can be used to guide the evaluation of engineering geological conditions and the stability analysis of dam foundation rock mass in red-bed area.
作者
高平
陈艳国
Gao Ping;Chen Yanguo(Yellow River Engineering Consulting Co.,Ltd.,Zhengzhou 450003,China)
出处
《三峡大学学报（自然科学版）》
CAS
北大核心
2019年第S01期37-40,共4页
Journal of China Three Gorges University：Natural Sciences
关键词
古贤水利枢纽
剪切带
软弱夹层
空间特征
Guxian hydro-junction
shear zone
weak intercalation
spatial characteristics
