岩土力学2017，Vol.38Issue(12)：3395-3401,7.DOI:10.16285/j.rsm.2017.12.001
考虑干湿循环作用泥质砂岩的强度与破坏准则研究
Strength and failure criterion of argillaceous sandstone under dry-wet cycles
摘要
Abstract
It is of great significance to study the effect of repeated fluctuation of reservoir water level on the stability of slope.Considering the problem of water-rock interaction,uniaxial and triaxial compression tests were conducted on argillaceous sandstone at different dry-wet cycles,respectively.The results show that the deterioration degrees from high to low are as followed:peak strength,cohesion and internal friction angle.Meanwhile,the deterioration degrees of mechanical parameters increase with increasing the times of dry-wet cycles.In combination with Drucker-Prager criterion (D-P criterion) that widely used in geotechnical plastic mechanics,a new D-P yield criterion is put forward for argillaceous sandstone under different confining pressures and dry-wet cycles.By comparing the experimental value with the theoretical peak value calculated by the modified D-P yield criterion,the error is found less than 10 percent.Hence,the D-P yield criterion is feasible for argillaceous sandstone under dry-wet cycles in practical applications.This study provides a theoretical basis for yield strength of rock under the arbitrary confining pressure in practical engineering.关键词
干湿循环/三轴压缩/D-P屈服准则/峰值强度/泥质砂岩Key words
dry-wet cycle/triaxial compression/Drucker-Prager criteria/peak strength/argillaceous sandstone分类
建筑与水利引用本文复制引用
刘新荣,王子娟,傅晏,张梁,袁文,缪露莉..考虑干湿循环作用泥质砂岩的强度与破坏准则研究[J].岩土力学,2017,38(12):3395-3401,7.基金项目
2013年国家自然科学基金项目(No.41372356) （No.41372356）
2013年国家自然科学基金青年基金(No.51308567).This work was supported by the National Natural Science Foundation of China (41372356) and the Young Scholars of National Natural Science Foundation of China in 2013 (51308567). （No.51308567）
