砂性土填料压缩特性试验研究  

Experimental Study on the Compression Property of Sandy Filling

作　　者：张淑宝 ZHANG Shubao(Zhangzhou Xiamen-Chengdu Expressway Expansion Engineering Co.,Ltd.,Zhangzhou 363000,Fujian,China)

机构地区：[1]漳州厦蓉高速扩建工程有限公司,福建漳州363000

出　　处：《路基工程》2018年第5期115-118,148,共5页Subgrade Engineering

摘　　要：压缩模量是评价土体压缩特性和计算沉降量的重要指标,该指标与土体含水率、压实度等有密切关系。为此,以厦蓉高速漳州段高填方路堤工程为背景,通过室内快速压缩试验,对不同含水率、不同压实度下砂性土填料的压缩特性进行研究。结果表明:砂性土填料的压缩模量随压实度的增大而显著增大,随含水率的增大呈先减小后增大的趋势。究其原因,在高含水率条件下,受孔隙水压的影响,采用快速压缩试验测得的压缩模量偏大,对于高含水率的路堤填料,采用标准压缩试验,才能准确测定其压缩模量。Compression modulus is an important index to indicate the compressive property of soil and evaluate the settlement.The compression modulus of sandy soil is related to its water content and compactness significantly.Based on the highfill embankment project in Zhangzhou Section of Xiamen-Chengdu Highway,the compressive property of sandy filling with different compactness and water content is carefully studied through fast compression tests.The results show that the compression modulus of sandy filling increases significantly with its compactness.On the other hand,the compression modulus of sandy filling decreases firstly and then increases slightly with increase of water content.Due to the influence of pour pressure,under high water content,the compression modulus measured by fast compression tests is greater than standard tests.Hence,only standard compression test can be used to accurately measure its compression modulus for the embankment filling with high water content.

关 键 词：砂性土填料 压缩模量 压实度 含水率 

分 类 号：TU411.5[建筑科学—岩土工程]