土木工程与管理学报2026，Vol.43Issue(1)：62-68,7.DOI:10.13579/j.cnki.2095-0985.2026.20250325
含夹层软岩剪切流变特性试验研究
Experimental Study on Shear Rheological Characteristics of Layered Soft Rock
王永伟 1杨茂强 1王艳琴 1汪斌2
作者信息
- 1. 中交第二航务工程局有限公司第五工程分公司,湖北 武汉 430012
- 2. 长江科学院水利部 岩土力学与工程重点实验室,湖北 武汉 430010
- 折叠
摘要
Abstract
The dam site area of a hydropower station is predominantly composed of stratified soft rock with weak interlayers,which govern the differential settlement and sliding stability of the dam founda-tion.To investigate the shear rheological behavior of soft rock containing weak interlayers,stepwise loading shear creep tests were conducted under varying normal and shear stresses.The Burgers rheo-logical model was adopted to characterize the shear response.The constitutive parameters of the strati-fied soft rock during stepwise loading were identified via the Quasi-Newton optimization algorithm.Based on strain-time curves derived from experimental data,isochronous shear stress-strain clusters were established for distinct stress levels.The results indicate that the long-term internal friction angle of the weak interlayers corresponds to a coefficient of 0.245(90.7％of the instantaneous value),and the long-term cohesive strength is 0.0131 MPa(93.6％of the instantaneous cohesion).These parame-ters provide critical inputs for long-term stability assessment and deformation prediction of the dam foundation.关键词
含夹层软岩/剪切流变试验/Burgers流变模型/本构模型参数辨识/流变长期强度Key words
soft rock with interlayers/shear rheological test/Burgers rheological model/constitutive model parameter identification/long-term rheological strength分类
建筑与水利引用本文复制引用
王永伟,杨茂强,王艳琴,汪斌..含夹层软岩剪切流变特性试验研究[J].土木工程与管理学报,2026,43(1):62-68,7.
