中国铁道科学2018，Vol.39Issue(3)：8-14,7.DOI:10.3969/j.issn.1001-4632.2018.03.02
基于静力触探测试技术的基础沉降计算
Calculation of Foundation Settlement Based on Cone Penetration Testing Technology
摘要
Abstract
On the basis of existing foundation settlement research,the calculation method for foundation settlement based on cone penetration test was established considering different stratum conditions.In this study,an empirical formula was used to determine initially the calculation depth of the foundation settlement,which was verified by the stress ratio method.A linear empirical formula of the penetration resistance based on cone penetration test was used to determine soil compression modulus.The strain influence coefficient of foundation base by Schmertmann was used to determine indirectly the vertical stress of foundation soil,and the strain influence coefficient under rigid boundary conditions was stipulated to zero.Engineering examples showed that the results of foundation settlement calculated by the established foundation settlement calculation method based on cone penetration had a good agreement with the measured settlement values.This method had clear physical meaning and was applicable to all types of stratum conditions.It had a wide range of applications and a simple calculation process which could be done only by hand.All required parameters to calculate the foundation settlement could be obtained by in-situ test of cone penetration,without drilling,sampling and indoor consolidation tests.This method could avoid such problems as large disturbance of the samples by drilling,large difference between the test results and the in-situ physical & mechanical properties of soil,a small number of tests,insufficient representation of the samples and inconvenience of drilling undisturbed samples.关键词
基础/沉降/静力触探/沉降计算深度/基础深度影响系数/基底应变影响因子Key words
Foundation/Settlement/Cone penetration test/Settlement calculation depth/Influence coefficient of foundation depth/Strain influence factor of foundation base分类
建筑与水利引用本文复制引用
李鹏..基于静力触探测试技术的基础沉降计算[J].中国铁道科学,2018,39(3):8-14,7.基金项目
中国铁路总公司科技研究开发计划项目重点课题(2015G006-G) （2015G006-G）
天津市城乡建设委员会科技开发项目(2014-10) （2014-10）
