旁压试验在轨道交通勘察中的应用  

Application of Pressuremeter Test in Rail Transit Survey

作　　者：张智敏 ZHANG Zhimin(Shaanxi Railway Engineering Investigation Co.,Ltd.of China Railway First Survey and Design Institute Group Co.,Ltd.,Xi'an 710043,Shaanxi,China)

机构地区：[1]中铁一院集团陕西铁道工程勘察有限公司,陕西西安710043

出　　处：《工程技术研究》2024年第6期30-32,共3页Engineering and Technological Research

摘　　要：文章基于某工程实例,采用旁压试验分析施工段地层的岩土特性。试验结果表明,旁压模量随着土层深度的增加而增大,反映了土体的抗剪强度。由于土层深度的增加,土壤颗粒之间的摩擦力也相应增加,从而减少了土壤的剪切滑动,增加了其抗剪变形的能力。卵石层的初始水平压力、临塑压力和极限压力都随着土层深度的增加而增大,说明卵石层的密实度和抗剪强度都随着深度的增加而提高。Based on an engineering example,this paper analyzes the geotechnical characteristics of the stratum in the construction section by using the pressuremeter test.The test results show that the lateral pressure modulus increases with the increase of soil depth,which reflects the shear strength of soil.Due to the increase of soil depth,the friction between soil particles also increases accordingly,which reduces the shear slip of soil and increases its ability to resist shear deformation.The initial horizontal pressure,critical plastic pressure and ultimate pressure of the pebble layer increase with the increase of soil depth,indicating that the compactness and shear strength of the pebble layer increase with the increase of depth.

关 键 词：旁压试验 地层勘察 变形特性 轨道交通 旁压模量 

分 类 号：U239.5[交通运输工程—道路与铁道工程]