路基工程Issue(2)：84-88,101,6.DOI:10.13379/j.issn.1003-8825.2017.02.20
交通荷载作用下淤泥质黏土不排水剪切强度特性研究
Study on the Undrained Shear Strength Characteristics of Mucky Clay under Traffic Load
袁厚海1
作者信息
- 1. 海南有色工程勘察设计院,海口570100
- 折叠
摘要
Abstract
The soft soil can generate excess pore water pressure under dynamic load,which causes the decrease of effective stress and the attenuation of undrained strength of soft soil.In order to research the strength softening law of soft soil varying with vibration times under dynamic loading,a calculation formula for dynamic pore pressure-vibration times relation considering vibration frequency is established to test and analyze which is introduced into the calculation formula for undrained shear strength under dynamic load based on critical soil mechanics theory to analyze the development rules of the relation curve of undrained shear strength varying with vibration times in mechanism and compare with the test results.The results show that the modified pore pressure-vibration times relation calculation formula could consider the influence of vibration frequency.Under 10000 vibration times,u/σ'3 is 0.45 ～0.65.The semi-empirical undrained shear strength-vibration times calculation formula could predict the undrained strength at any vibration times under different vibration frequencies.The undrained shear strength attenuates to 25 ％ ～ 80 ％ under 10 000 vibration times.关键词
淤泥质黏土/交通荷载/超静孔隙水压力/不排水抗剪强度/振动频率Key words
mucky clay/traffic load/excess pore water pressure/undrained shear strength/vibration frequency分类
建筑与水利引用本文复制引用
袁厚海..交通荷载作用下淤泥质黏土不排水剪切强度特性研究[J].路基工程,2017,(2):84-88,101,6.
