红层软岩崩解性室内试验研究

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摘要针对红层软岩遇水易软化、崩解的特点，以铜陵—黄山高速公路汤口—屯溪段沿线的红层软岩为例，选取该路段沿线具有代表性的2类岩样(砂岩和泥岩)进行室内浸水崩解试验，分析2类软岩崩解过程的颗粒级配变化情况，并对比分析其崩解性能，将崩解性由强至弱划分为强崩解、中崩解、弱崩解和不崩解4个等级。试验结果表明：红层软岩的类型、胶结物类别以及岩石中黏土矿物的含量等是决定红层软岩崩解性强弱的主要内在因素；崩解物颗粒由大到小变化时，崩解物的崩解性逐渐减弱甚至消失；为更清楚地反映各岩样崩解速度的快慢及崩解程度的强弱，可选取崩解物中粒径大于5 mm及小于0.25 mm的颗粒含量的变化为评价对象。最后，对红层软岩的崩解机制进行较为深入的研究。

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	吴道祥1
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关键词 ：岩石力学, 红层, 软岩, 崩解性

Abstract：Taking red-bed soft rock along Tangkou—Tunxi section of Tongling—Huangshan expressway for example，according to the characteristics of softening and slaking with water，two representative rock samples (sandstone and mudstone) along the expressway are chosen to perform laboratory tests of slaking；and changes in grain contents of rock samples in slaking process are analyzed. On this basis，the comparative analysis of slaking characteristics of those representative samples is made；and the slaking characteristics of those samples are divided into four grades，i.e. strong slaking，medium slaking，feeble slaking and nonslaking. The results indicate that the types of red-bed soft rock and its cement，and the content of clay mineral are the main inner determinants of slaking of red-bed soft rock；the slaking characteristic gradually decreases as the grain diameter of slaking substance reduces；in order to obviously reflect the rate and degree of slaking of those samples，changes in grain contents of slaking substances greater than 5 mm and less than 0.25 mm should be selected as the evaluation objects. At last，thorough study of slaking mechanism of red-bed soft rock is made.

Key words： rock mechanics red-bed soft rock slaking characteristics

引用本文:

吴道祥1，2，刘宏杰1，王国强1. 红层软岩崩解性室内试验研究[J]. 岩石力学与工程学报, 2010, 29(S2): 4173-4179.
WU Daoxiang1，2，LIU Hongjie1，WANG Guoqiang1. laboratory Experimental study of slaking characteristics of red-bed soft rock. , 2010, 29(S2): 4173-4179.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2010/V29/IS2/4173

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