荷载水平和孔隙比对土次压缩性质影响研究  被引量:4

Influences of load level and void ratio on secondary compressibility of soil

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作  者:王者超[1] 乔丽苹[1] 李术才[1] 

机构地区:[1]山东大学岩土与结构工程研究中心,山东济南250061

出  处:《土木工程学报》2013年第1期112-118,共7页China Civil Engineering Journal

基  金:中国博士后科学基金(20110491597);山东大学人才引进与师资培养专项基金(2010HW08)

摘  要:开展砂土和黏土的次压缩试验,比较了砂土和黏土的次压缩性质,分析了土的次压缩系数与荷载水平和孔隙比之间的关系。研究结果表明,土的次压缩性质不仅与荷载水平有关,还与孔隙比密切相关。相同荷载水平条件下,孔隙比越大,次压缩系数越高。此外,通过次压缩系数-荷载-孔隙比的一般关系解释了荷载水平、应力历史和超载预压对土次压缩性质的影响。A series of 1 D compression tests were performed on sandy and clayey soils. The secondary compressibilities of the sandy and clayey soils are compared and the dependency of secondary compression coefficient on load and void ratio are investigated. The results show that the secondary compressibility of soil depends on not only the applied load, but also the void ratio of the soil. At a given load level, the higher the void ratio of the soil, the higher the secondary compression coefficient of the soil is. The influences of load, loading history and preloading process on the secondary compressibility of soil are studied basing on the relationship between secondary compression coefficient, load and void ratio.

关 键 词:次压缩 荷载相关性 孔隙比相关性 拟似超固结状态 超载预压 

分 类 号:TU441.5[建筑科学—岩土工程] TU442[建筑科学—土工工程]

 

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