發(fā)布時間：2019-06-01 11:33

【摘要】：針對大崗山水電站壩區(qū)石英-綠簾石化蝕變問題,在系統(tǒng)調(diào)研和室內(nèi)試驗基礎(chǔ)上探討了石英-綠簾石化蝕變帶的地質(zhì)特征、礦物學特征及物理力學性質(zhì)。研究表明,花崗巖體中SN/E∠17°~26°緩傾角錯動帶常發(fā)育由動力變質(zhì)作用形成的石英-綠簾石相蝕變,錯動面常發(fā)育擦痕、階步。蝕變產(chǎn)生了絹云母、綠泥石、綠簾石和方解石等軟弱礦物,含量在18%左右,化學分析顯示其成分變化不大。物理力學試驗顯示:蝕變巖石物理水理和強度特性有一定程度的弱化,天然和飽和抗壓強度損失率為8.3%和5.9%。蝕變產(chǎn)生的石英和綠簾石對結(jié)構(gòu)面的抗剪強度產(chǎn)生一定影響,現(xiàn)場直剪試驗表明結(jié)構(gòu)面抗剪(斷)強度明顯降低。研究成果具有一定創(chuàng)新性,對石英-綠簾石化蝕變的工程影響和處理提供參考。
[Abstract]:Aiming at the problem of quartz-green curtain alteration in dam area of Dagangshan Hydropower Station, the geological characteristics, mineralogical characteristics and physical and mechanical properties of quartz-green curtain alteration zone are discussed on the basis of systematic investigation and laboratory test. The results show that the quartz-chlorite phase alteration formed by dynamic metamorphism is often developed in the SN/E 鈮，

本文編號：2490240