铁道科学与工程学报2018，Vol.15Issue(6)：1373-1382,10.
基于Harris函数的2级加载固结试验方法及可靠性判别准则
Two-level-loading consolidation test based on Harris function and it's reliability criterion
摘要
Abstract
This paper aims at improving the geotechnical test efficiency for obtaining modulus of compression and preconsolidation pressure. By utilizing the Harris function to depict thee-lgp curve, a consolidation test method of two-level-loading was proposed for measuring the compressibility of undisturbed soil. The applicability of this method on calculating modulus of compressionEs and preconsolidation pressurepc was verified by the samples from Beijing-Shanghai high speed railway and Beijing-Tianjin intercity railway. The conclusions are made as follows: A compression curve expressed by the Harris function can be acquired through the soil initial void ratioe0 and the deformation values under two-levels load, and the error of compression modulus is mainly less than 10％ except when the pressure section is less than 100 kPa. Moreover, the average error stays only 5.59％. The coordinate point of minimum curvature radius and the slope of straight line can be found accurately by using Harris function. There is a positive correlation between the preconsolidation pressure obtained by Casagrande method and soil depth, and the comparison with burden pressure fits settlement law of test sections well. By selecting compression index as evaluation indicator, the reliability criterion of consolidation test was established according to probability model. The research results provide new approach for simplifying consolidation test method and ascertaining soil compressible parameters rapidly.关键词
固结试验/Harris函数/压缩模量/先期固结压力/可靠性判别准则/正态分布Key words
consolidation test/Harris function/modulus of compression/preconsolidation pressure/reliability criterion/normal distribution分类
交通工程引用本文复制引用
赵明志,罗强,蒋良潍,魏明..基于Harris函数的2级加载固结试验方法及可靠性判别准则[J].铁道科学与工程学报,2018,15(6):1373-1382,10.基金项目
国家重点基础研究发展计划(973计划)项目(2013CB036204) （973计划）
中央高校基本科研业务费专项资金资助项目(2682014CX064) （2682014CX064）
