人民长江2017，Vol.48Issue(8)：73-78,6.DOI:10.16232/j.cnki.1001-4179.2017.08.016
基于孔穴扩张和临界状态的黏土超固结比估算
Determination of OCR of clays by lateral pressure test based on cavity expansion and critical state concepts
谢志1
作者信息
- 1. 西安职业技术学院 建筑工程系,陕西 西安 710077
- 折叠
摘要
Abstract
It is difficult to eliminate the effects of stress release and soil disturbance when using conventional test method to determine the ratio of over consolidation (OCR) of clays.A new determination method of clay OCR by lateral pressure test using cavity expansion and critical state concepts is presented, which can make full use of lateral pressure test results and critical state parameters.The new method is used to estimate OCR of 4 types of clays and the results are compared with those values obtained from improved consolidation test.The results show that for over consolidated clays, the OCR obtained by the new method is in agreement with that of consolidation test, and the OCR obtained by the new method is slightly larger than that of consolidation test for lightly over consolidated clays, which all meet the requirements of engineering survey.As a new in-situ method to evaluate OCR of clays, the new method expands the application scope of the lateral pressure test and has certain engineering application value.关键词
旁压试验/修正剑桥模型/超固结比/不排水抗剪强度Key words
lateral pressure test/Modified Cambridge model/over consolidation ratio/undrained shear strength引用本文复制引用
谢志..基于孔穴扩张和临界状态的黏土超固结比估算[J].人民长江,2017,48(8):73-78,6.
