市政技术2025，Vol.43Issue(11)：36-45,10.DOI:10.19922/j.1009-7767.2025.11.036
重塑洞庭湖软土应力路径试验研究
Experimental Study on Stress Paths of Reconstituted Soft Soil in Dongting Lake
王康康 1云宇1
作者信息
- 1. 黄河水利职业技术大学土木与交通工程学院,河南开封 475004
- 折叠
摘要
Abstract
To investigate the influence of stress paths on the mechanical properties of reconstituted soft soil,the re-shaping of Dongting Lake soft soil was taken as the research object to analyze the mechanical properties through consolidation undrained shear tests.The research results indicate that under the isobaric consolidation conditions,both the shear stress of normally consolidated soil and over-consolidated soil gradually increase with the increase of the axial strain,but the growth rate gradually slows down,and finally tends to be stable;Under the biased consoli-dation conditions,Both the increase of overconsolidation ratio and static soil pressure coefficient will enhance the shear stress.Under the isobaric consolidation conditions,the excess pore water pressure of normally consolidated soil shows a trend of first increasing and then slightly decreasing;Under different consolidation pressures,the ef-fective stress paths morphologies of normally consolidated soil were similar.Based on the experimental results,the relevant parameters of the Duncan-Zhang model for soft soil of Dongting Lake were obtained,and the failure ratio was corrected.By fitting the lateral strain and axial strain by hyperbolic functions,it was found that there is an ap-proximately linear relationship between strain ratio and lateral strain.Based on this,the tangent modulus and tan-gent Poisson's ratio expressions of the Duncan-Zhang model were established.The model with modified failure ratio better reflects the influence of overconsolidation ratio on the deformation characteristics of soft soil.关键词
重塑洞庭湖软土/应力路径/超固结比/破坏比Key words
reconstituted soft soil in Dongting Lake/stress path/over-consolidation ratio/failure ratio分类
建筑与水利引用本文复制引用
王康康,云宇..重塑洞庭湖软土应力路径试验研究[J].市政技术,2025,43(11):36-45,10.
