筋土峰值拉拔力的影响因素研究  

Study on the Factors Influencing the Peak Tensile Force of Reinforced Soil

作　　者：姚文杰 李明宝[1] 郑俊杰[2] 郭亿辉 YAO Wenjie;LI Mingbao;ZHENG Junjie;GUO Yihui(School of Civil Engineering and Transportation,Northeast Forestry University,Harbin 150040,China;School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]东北林业大学土木与交通学院,哈尔滨150040 [2]华中科技大学土木与水利工程学院,武汉430074

出　　处：《森林工程》2024年第1期201-206,共6页Forest Engineering

基　　金：国家自然科学基金(52078236)。

摘　　要：为解决加筋土结构中筋土界面间复杂效应问题,采用筋材的微单元受力平衡方法,考虑剪切刚度与位移的影响,推导筋土峰值拉拔力计算公式;预测筋材在所受拉力不超过其峰值拉拔力的情况下各个位置的拉力及位移;在最大峰值拉拔力的范围内分析筋材有效加筋长度、剪切刚度对筋材位移的影响及其变化规律。结果表明,在峰值拉拔力一定的情况下,筋材的有效加筋长度与剪切刚度对峰值拉拔力的影响较为显著,而弹性模量对峰值拉拔力的影响较小,筋材位移随着筋材有效加筋长度、剪切刚度的增大而呈非线性减小。将采用筋土界面峰值拉拔力公式的计算结果与拉拔试验的试验结果进行对比分析,发现两者的最大峰值拉拔力相差不大,结果吻合较好。研究成果可以为加筋土工程提供一定的理论参考。In order to solve the problem of complex effects between the reinforced soil interface in reinforced soil structures,the paper adopted the micro-unit force balance method of the reinforcing material,considered the effects of shear stiffness and displacement,and derived the formula for the peak tensile force of reinforced soil.The tensile forces and displacements of the reinforcement at each location were predicted if the tensile forces do not exceed the peak pullout force.The maximum peak tensile force was determined,and the effect of effective reinforcement length and shear stiffness on the displacement of reinforcement and its variation rule were investigated within the range of maximum peak tensile force.The results showed that when the peak tensile force was constant,the effective reinforcement length and shear stiffness had a significant effect on the peak tensile force,while the elastic modulus had a relatively small effect on the peak tensile force.The displacement of the reinforcement decreased nonlinearly with the increase of the effective reinforcement length and shear stiffness.The calculation results based on the formula of peak tensile force at the interface of reinforced soil were compared with the test results.It was found that the maximum peak tensile force between the two was not different,and the results agreed well.The research results can provide some theoretical reference for reinforced soil engineering.

关 键 词：筋土界面 峰值拉拔力 剪切刚度 有效加筋长度 弹性模量 

分 类 号：U416.1[交通运输工程—道路与铁道工程]