西北水电Issue(4)：38-44,7.DOI:10.3969/j.issn.1006-2610.2024.04.007
抽水蓄能电站蚀变岩力学特征及工程性能研究
Study on Mechanical Characteristics and Engineering Performance of Altered Rock in Pumped Storage Power Station
摘要
Abstract
The existence of altered rock mass has significant impact on the stability of the rock mass in pumped storage power station en-gineering.The mechanical characteristics of rock mass with different alteration degrees are analyzed by indoor compression test,shear test,creep test,permeability test,field saturated shear test,dry-wet cycle shear test and other means.The test results show that the av-erage saturated compressive strength of strongly altered,weakly altered,and slightly altered rock masses are 0.2,37.9,and 71.8 MPa,respectively,and their engineering properties are similar to those of residual slope weathering,strongly weathered,and weakly weathered rock masses,respectively;due to the coarse mineral particles,the internal friction angle of weakly altered rock mass is43.10°～46.55°,which is higher than the internal friction angle of slightly altered rock mass of 39.2°～42.8°;in terms of resistance to permeability de-formation and damage,the critical permeability failure slope of the reshaped sample of strongly altered rock mass is 5.356～9.773,with the same permeability deformation and damage characteristics as gravel and sand;strongly altered rock mass has a creep effect,and its strength decreases with time;the water physicochemical characteristics of strongly altered rock mass are more obvious,and after dry-wet cycles,the shear strength decreases by 0%～6% .Based on the engineering mechanical properties of altered rock mass,a quantitative in-dex for the engineering performance classification of altered rock mass is established,and the study results have guiding significance for engineering treatment关键词
蚀变岩体/饱和抗压强度/渗透变形破坏/蠕变效应/水理化/量化指标Key words
altered rock mass/saturated compressive strength/seepage deformation and damage/creep effect/water physicochemistry/quantitative index分类
天文与地球科学引用本文复制引用
樊柱军,刘志伟,贺鸣,冯超越..抽水蓄能电站蚀变岩力学特征及工程性能研究[J].西北水电,2024,(4):38-44,7.基金项目
中国电力工程顾问集团西北电力设计院有限公司重大科技项目(NW-RD032-2023). （NW-RD032-2023）
