岩土工程学报Issue(12)：2149-2156,8.DOI:10.11779/CJGE201512003
含充填物的厚壁圆筒砂岩的力学性质研究
Mechanical property of thick-walled hollow cylinders of sandstone with filling
摘要
Abstract
Based on uniaxial and pseudo-triaxial compression tests, the effect of support on the strength, deformation and failure characteristics of circular roadway is simulated by using solid specimens, thick-walled hollow cylinder specimens and thick wall cylinder specimens with aluminum rod. The tests indicate that: (1) The uniaxial compressive strength and elastic modulus of solid specimens and filled specimens are roughly the same, and those of the cylinder specimens are decreased by 31.8% and 22.4%; (2) When the thick-wall cylinder specimens have layered destruction along the circumference under triaxial compression, the shear area decreases with the increase of confining pressure, and collapse hole appears when the confining pressure is 40 MPa; (3) Filling have significant influence on mechanical properties of specimens when the filled specimens enter the plastic deformation, and it can change the rock stress state and make the two-dimensional stress state of inner wall back to the three-dimensional stress state; (4) Filling can cause inhibition of larger lateral displacement of inner wall and prevent the rock of free surface fall off; (5) Rock failure doesn't mean that the bearing capacity disappears, rock of filled specimens loses cohesive force, and the bearing capacity of filled specimens mainly depends on friction forces of filling and rock and rock fractures.关键词
岩石力学/厚壁圆筒/非均匀应力/开挖/衬砌Key words
rock mechanics/thick-walled hollow cylinder/nonuniform stress/excavation/lining分类
建筑与水利引用本文复制引用
李夕兵,吴秋红,董陇军,陈璐,谢晓锋,张楚旋..含充填物的厚壁圆筒砂岩的力学性质研究[J].岩土工程学报,2015,(12):2149-2156,8.基金项目
国家自然科学基金项目（41272304，11472311）；湖南省研究生科研创新基金项目 （）
