圆形筒状土袋加筋土的强度分析  

STRENGTH ANALYSIS OF REINFORCED SOIL WITH CIRCULAR CYLINDRICAL SOIL BAGS

作　　者：雷胜友[1] LEI Shengyou(School of Highway,Chang'an University,Xi'an 710064,China)

机构地区：[1]长安大学公路学院,西安710064

出　　处：《力学与实践》2025年第1期165-170,共6页Mechanics in Engineering

基　　金：国家自然科学基金项目(95479017);国家级大学生创新训练项目(201710710003);长安大学精品课建设项目资助。

摘　　要：首先对圆形筒状土袋加筋土三轴试样进行受力分析,认为土体破坏时,处于极限平衡状态,从而得到加筋土试样的强度表达式,并对该表达式作了详细的讨论分析。研究表明,用土袋加筋后,被约束土体的黏聚力有很大的提高,如果考虑袋内草籽生长后根的加筋作用,则形成二次复合加筋体,当根比较柔软时,则加筋后土的黏聚力有很大提高,当根比较坚硬时,则加筋后土的黏聚力和内摩擦角皆有很大提高。最后用所得强度表达式进行理论计算,发现当折减系数在10%~20%时,计算得到的强度线与试验强度线吻合得相当好,其最大误差在10%以内。The author first conducts a stress analysis on the triaxial specimen of reinforced soil with circular cylindrical soil bags,and believes that the soil is in a limit equilibrium state when it fails.Therefore,the strength expression of the reinforced soil specimen is obtained,and a detailed discussion and analysis of this expression are conducted.The research has shown that after reinforcement with soil bags,the cohesive force of the constrained soil is greatly improved.If the reinforcement effect of the roots after the growth of grass seeds in the bag is considered,a secondary composite reinforcement body is formed.When the roots are relatively soft,the cohesive force of the reinforced soil is greatly improved.When the roots are relatively hard,the cohesive force and internal friction angle of the reinforced soil are greatly improved.Finally,the author used the obtained strength formula for theoretical calculations and found that when the reduction coefficient was between 10% ~20%,the calculated strength line matched the experimental strength line quite well,with a maximum error of within 10%.

关 键 词：极限平衡状态 土袋 加筋土 黏聚力增量 内摩擦角增量 拉力 

分 类 号：TU528.57[建筑科学—建筑技术科学]