【摘要】：針對(duì)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(yàn)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(xué)特征及物理力學(xué)性質(zhì)。研究表明,花崗巖體中SN/E∠17°~26°緩傾角錯(cuò)動(dòng)帶常發(fā)育由動(dòng)力變質(zhì)作用形成的石英-綠簾石相蝕變,錯(cuò)動(dòng)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(xué)分析顯示其成分變化不大。物理力學(xué)試驗(yàn)顯示:蝕變巖石物理水理和強(qiáng)度特性有一定程度的弱化,天然和飽和抗壓強(qiáng)度損失率為8.3%和5.9%。蝕變產(chǎn)生的石英和綠簾石對(duì)結(jié)構(gòu)面的抗剪強(qiáng)度產(chǎn)生一定影響,現(xiàn)場(chǎng)直剪試驗(yàn)表明結(jié)構(gòu)面抗剪(斷)強(qiáng)度明顯降低。研究成果具有一定創(chuàng)新性,對(duì)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(hào)：2490240