摘要
本文通过对哈尔滨岗阜状平原地铁线某标段勘察项目旁压试验成果分析,与其他试验成果对比研究。研究表明:(1)地基承载力特征值、旁压模量、旁压剪切模量在上更新统哈尔滨组冲洪积层中呈现周期性变化,变化周期为5 m左右,在每个周期内地基承载力特征值随深度增加先增大后减小,下一周期地基承载力要高于上一周期地基承载力。(2)总体上不同试验方法获得的地基承载力表现为旁压试验>室内试验>标贯试验>静探试验,并提出了临塑压力法修正系数的地区经验值。
This paper analyzes the results of pressuremeter test in a survey project of a certain section of the Harbin urban rail transit and conducts a comparative study with other test results.The research indicates that:(1)The characteristic value of subsoil bearing capacity exhibits periodic changes in the upper Holocene Harbin Formation alluvial-pluvial deposits,with a cycle of about 5 meters.Within each cycle,the characteristic value of foundation bearing capacity first increases and then decreases as the depth increases.The foundation bearing capacity in the next cycle is higher than that in the previous cycle.This pattern is not evident in the middle Pleistocene Shanghuangshan Formation lacustrine deposits and only appears in individual boreholes.(2)Overall,the foundation bearing capacity obtained from different test methods is ranked as follows:pressuremeter test>laboratory test>standard penetration test>cone penetration test.Additionally,the regional empirical value of the correction factor for the critical pressure method is proposed.
作者
张玉超
黄杰
赵琳琳
Zhang Yuchao;Huang Jie;Zhao Linlin(Beijing Aidi Geological Engineering Technology Co.,Ltd.,Beijing,China)
出处
《科学技术创新》
2025年第7期197-200,共4页
Scientific and Technological Innovation
关键词
旁压试验
岗阜状平原
粉质黏土
地基承载力
pressuremeter test
gangdy plain
silty clay
subsoil bearing capacity
