周期性浸泡下三峡库区松散土体微观特性分析-重庆交通大学.PDF

第 29卷第 3期 重 庆 交通 大学 学 报 ( 自然 科学 版) V ol. 29 N o. 3 2010 年 6 月 JOURNAL OF CH ONGQ ING JIAOTONG UN IVER SITY ( NATURAL SC IEN CE) Jun. 20 10 何晓英, 唐红梅, 陈洪凯, 刘虎队 ( , 400074) 17 5 m , , X , ; ; X; ; TU 4 5 A 1674 - 0696 ( 20 10) 03- 044 5- 05 M acroscopic Characteristics of Loose Earth in Cyclic Soak at Three Gorges ReservoirA rea HE X iaoy ing, TANG H ongm ei, CH EN H ongka,i L IU H udu i ( D ep artm ent o f G eolog ica l G eotechn ica l Eng ineering, Schoo l of R ive r O cean Eng ineer ing, Chongqing J iaotong U niversity, Chongq ing 400074, Ch ina) Abstract: A s the w a ter leve l o f Three G o rges R ese rvo ir h as r isen up to 17 5m, it h as already cau sed p lenty of geolog ic dis asters, esp ecially cau sed som e occurred d isaste rs to recur. The current researches in this f ie ld don t take the influ ence o f cyc lica l soak on Three Go rges R eservo ir s earth into con sideration. So the typ ica l loose ea rth of T hree Go rges R eservo ir a r ea is adopted, and the earth samp les are investig ated through a series of tests w h ich a re carried out under the condition of n a tive state, longterm soak state and cy clica l so ak state. P hase s qu a litative ana lysis and qu antitative ana lysis on these ea rth samp les are carried out by po lyc rysta lX ray diffractom ete r. T hrough com pa ring phase s ana lysis, the conclu sion th at the cyc lic soak cau sed by the fluc tu ation of the w a ter level at rese rvo ir area is an mi portant fac to r to cau se the dete rio ra tion o f earth stru cture and inten sity is con f irm ed. K ey words: m ine ra l composition test; cyclic soak; Xd if