某水电站厂址区蚀变岩体力学特性研究

发布时间：2018-04-19 04:12

本文选题：水电站 + 矿物蚀变　；参考：《地下空间与工程学报》2017年S2期

【摘要】：某水电站厂址区岩性为晋宁-澄江期闪长岩,受地质历史多期构造运动及区域断裂影响,厂址区岩体普遍蚀变。根据风化程度、矿物组成、矿物排列方式、矿物蚀变类型、各向异性以及岩质类型等划分岩石蚀变程度为A、B、C、D四种类别,其物理力学性质由好到差依次为A类B类C类D类。通过蚀变程度的研究,结合围岩工程地质综合分析,F4下盘岩体总体为A类蚀变,岩体质量好,围岩强度应力比2S4,围岩稳定性好,最终,将三大洞室直接布置于F4下盘岩体中。
[Abstract]:The lithology of the site of a hydropower station is Jinning-Chengjiang diorite, which is affected by the multi-stage tectonic movement and regional faults in geological history, and the rock mass in the site is generally altered.According to the weathering degree, mineral composition, mineral arrangement, mineral alteration type, anisotropy and rock type, the rock alteration degree is classified into four types, the physical and mechanical properties of which are A, B, C and D from good to bad.Through the study of alteration degree, combined with the comprehensive analysis of surrounding rock engineering geology, the rock mass of F4 footwall is generally A alteration, the quality of rock mass is good, the strength stress ratio of surrounding rock is 2S4, and the stability of surrounding rock is good. Finally, the three caverns are arranged directly in the rock mass of F4 footwall.
【作者单位】：中国电建集团成都勘测设计研究院有限公司;
【分类号】：TV223

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