不同筋材和布筋形式对加筋土强度影响的试验研究  

Experimental Investigation of the Effects of Diffferent Reinforcement Materials and Reinforcement Distribution Modes on the Strength of Reinforced Loess

作　　者：雷胜友[1] 陈辉[2] 

机构地区：[1]长安大学公路学院,西安710064 [2]江西科技学院土木工程学院,南昌330098

出　　处：《西南大学学报（自然科学版）》2013年第8期122-127,共6页Journal of Southwest University(Natural Science Edition)

基　　金：国家自然科学基金项目(59479017);陕西省自然科学基金项目(2001C01);地质灾害防治与地质环境保护国家重点试验室开放基金项目(GZ2005-03);陕西省交通科技项目(06-01K);长安大学<土质学与土力学>精品课建设项目资助

摘　　要：笔者进行了两种加筋材料、两种布筋形式下的加筋黄土的三轴剪切试验,发现加筋土的强度随围压、加筋层数、加筋材料的刚度的增大而增大;加筋土强度提高效益数随加筋层数、加筋材料弹性模量的增大而增大,随围压的增大而减小;筋材周向布置时的加筋土强度提高效益数比径向布置时的大;筋材发挥作用的临界轴向应变随着围压的增大而增大,随加筋层数、筋材刚度的增加而减小;加筋土的规格化视粘聚力随规格化加筋间距的增加而减小.Tri-axial tests were carried out on reinforced loess with two different reinforcement materials and two reinforcement distribution modes.The strength of the reinforced soil increased with the increase in confining pressure,reinforced layers and the rigidity of the reinforcement material.The percentage of increase in strength of the reinforced loess to that of loess increased with increasing reinforced layers and elastic modulus of reinforcement and decreased with increasing confining pressure.Circumferential distribution of the reinforcement materials gave greater percentage of increase in strength of the reinforced loess to that of loess than radial distribution.The critical axial strain increased with the increase in,and decreased with the increase in reinforced layers and elastic modulus of reinforcement.Normalization-regarded cohesion decreased with increase in normalization height.

关 键 词：加筋土 径向 周向 应力应变曲线 对比 

分 类 号：TU528.57[建筑科学—建筑技术科学]