加筋粗粒土力学性能试验研究  

Experimental Study on Mechanical Properties of Geogrid-reinforced Granular Soil

作　　者：谢贝贝 胡幼常[1] 

机构地区：[1]武汉理工大学交通学院,武汉430063

出　　处：《交通科技》2017年第6期99-102,共4页Transportation Science & Technology

基　　金：新疆维吾尔自治区交通运输厅科技项目(2012-303-5)资助

摘　　要：采用3种土料、2种加筋材料(三向土工格栅、双向土工格栅)进行加筋土的无侧限抗压试验,探讨了加筋层数、加筋间距、含水率、压实度和土粒级配等对加筋粗粒土抗压特性的影响,得到以下主要结论:(1)压实度越高、加筋层数越多的加筋粗粒土承受大变形的能力越强,抗震性能越好;(2)压实度越大的粗粒土,增加格栅加筋密度对提高加筋土强度的作用越显著;(3)加筋粗粒土的强度随土中粗粒含量的增加而增大;(4)含水率对加筋粗粒土的强度基本无影响。Unconfined compression tests with three kinds of soilsand two kinds of reinforcement materials(triaxial geogrid and biaxial geogrid)have been performed to investigate the effects on compressive characteristics of the number of geogrid inclusions,the reinforcement spacing,or the particle gradation,the water contents or the compaction degree of granular soil.The following conclusions are presented:(1)The reinforced granular soil with a higher soil's compaction degree and more geogrid inclusions can bear a large deformation,and the seismic behavior improves as well.(2)For the reinforced granular soil with a higher soil's compaction degree,the strength will increase significantly by increasing the geogrid inclusions.(3)The geogrid-reinforced granular soil including more coarse grains has a higher strength.(4) Water content has nearly no influence upon the strength of a geogrid-reinforced granular soil.

关 键 词：无侧限抗压试验 土工格栅 粗粒土 

分 类 号：U416.217[交通运输工程—道路与铁道工程]