离石加筋黄土的力学特性及加筋效果研究  

Study on Mechanical Properties and Reinforcement Effect of Lishi Reinforced Loess

作　　者：马林[1,2] 张蕾 刘力源 MA Lin;ZHANG Lei;LIU Liyuan(Shanxi Transportation Research Institute,Taiyuan 030006,China;Geotechnical and Underground Engineering Key Laboratory of Shanxi Province,Taiyuan 030006,China)

机构地区：[1]山西省交通科学研究院,山西太原030006 [2]岩土与地下工程山西省重点实验室,山西太原030006

出　　处：《华北水利水电大学学报（自然科学版）》2019年第4期77-82,共6页Journal of North China University of Water Resources and Electric Power：Natural Science Edition

基　　金：山西省应用基础研究项目(201701D221213);山西省交通运输厅科技项目(2018-1-17)

摘　　要：针对加筋土加筋机理不明确的问题,通过室内加筋土的固结不排水三轴试验,分析了不同筋材、不同围压和不同加筋方式下离石黄土的力学特性,揭示了加筋土在不同影响因素下的力学演化机理。通过试验研究得到如下结论:①筋材面积相同时,硬窗纱的拉力值最大,笼布的次之,软窗纱的最小;②硬窗纱、笼布和软窗纱加筋后,这3种加筋土的黏聚力分别提高了260.4%、229.6%和139.8%;③土体强度随筋材层数的增加而增大,土体加筋效果随围压的增大而减小。In view of the uncertain problem of reinforced soil reinforcement mechanism,the mechanical properties of Lishi loess under different reinforcement materials,confining pressures and reinforcement modes are analyzed through the consolidation and undrained triaxial test of indoor reinforced soil.The mechanical evolution mechanism of reinforced soil under different influencing factors is revealed.The results are as follows.Firstly,when the reinforcement area is the same,the tensile force of the hard window yarn is the largest,the cage cloth is the second,and the soft window yarn is the smallest.Secondly,after the reinforcement of hard window yarn,cage cloth and soft window yarn,the cohesion of the three reinforced soils increased by 260.4%,229.6%and 139.8%respectively.Finally,the strength of soil increases with the increase of the number of reinforced layers,and the reinforcement effect of the soil decreased with the increase of the confining pressure.

关 键 词：加筋 离石黄土 强度 加筋效果 

分 类 号：TU411.3[建筑科学—岩土工程]