土工格栅加筋土三轴试验研究  

Study on geogrid reinforced soil triaxial test

作　　者：张同伟[1] 赵莹莹[1] 赵阳阳[2] 

机构地区：[1]佳木斯大学建筑工程学院,黑龙江佳木斯154007 [2]黑龙江省收费公路管理局佳木斯管理处,黑龙江佳木斯154007

出　　处：《河南理工大学学报（自然科学版）》2013年第1期103-108,共6页Journal of Henan Polytechnic University（Natural Science）

基　　金：黑龙江省教育厅科学技术研究项目资助(12511566);佳木斯市社会科学重点科研项目资助(11-135);佳木斯大学科学技术研究项目资助(L2011-032)

摘　　要：通过三轴试验方法,研究了土工格栅加筋土的强度及变形破坏特性;探讨了在不同加筋情况下,土工格栅加筋土强度影响因素及其变化规律;分析了素土和土工格栅加筋土的变形破坏形式及筋材在土体抗剪破坏过程中的变形机理.试验结果表明,加筋后土体的强度和抵抗变形能力明显增强,加筋土加筋效果在中围压下最合理、最有效;土工格栅加筋土应力-应变关系采用固结围压作为归一化因子具有很好的归一化特性,可以用归一化方程来表示.The geogrid reinforced soil strength and deformation and damage characteristics through are studied by triaxial test methods. In different stiffeners, the factor of geogrid reinforced soil strength and its change law are discussed. The deformation failure of plain soil, geogrid reinforced soil and the deformation mechanism of reinforcement in the process of soil shear failure are analyzed. The result shows： （ 1 ） Reinforced soil behind the bodyg strength and ability to resist deformation significantly enhanced. （2） In the case of reinforced layers unchanged, significantly enhanced with the confining pressure to increase the strength of the reinforced soil, a significant increase in the reinforcement effect. （3） In the case of the confining pressure constant, with the in- crease in the number of layers of reinforced earth reinforced intensity, reinforced effect significantly increased. （4） For the strength reinforcement effect coefficient, normalized intensity analysis found that the reinforcement effect of the reinforced earth is the most reasonable and most effective in confining pressure. （5） In the stress- strain relationship of geogrid reinforced soil, confining pressure processing as a normalization factor gave a uni- fied mathematical expression, which is a normalized formula and has good normalized characteristics. The re- sults of this study have a guiding significance for the in-depth study of the geogrid reinforced soil reinforcement mechanism and reinforced soil engineering.

关 键 词：三轴试验 土工格栅 加筋土 强度 变形破坏 

分 类 号：TU476.4[建筑科学—结构工程]