加筋垫层对软土路基加固效果的多方案比较  

Comparison of Reinforcement Effects of Reinforced Cushion Acting on Reinforcement Schemes of Road Soft Soil Subgrade

作　　者：张海太 张良翰 陈贺 ZHANG Haitai;ZHANG Lianghan;CHEN He(Yunnan Infrastructure Investment Co.,Ltd.,Kunming,Yunnan 650501,China;Broadvision Engineering Consultants,Kunming,Yunnan 650041,China;National Engineering Laboratory for Surface Transportation Weather Impact,Kunming,Yunnan 650041,China)

机构地区：[1]云南建设基础设施投资股份有限公司,云南昆明650501 [2]云南省交通规划设计研究院有限公司,云南昆明650041 [3]陆地交通气象灾害防治技术国家工程实验室,云南昆明650041

出　　处：《水利与建筑工程学报》2019年第2期156-161,共6页Journal of Water Resources and Architectural Engineering

基　　金：交通部科技示范工程项目(2017-09)

摘　　要：为了更好地将土工合成材料加筋垫层应用于不同软土路基加固方案中,通过有限元数值计算程序建立了复合地基分析模型,并根据现场试验结果验证了其合理性;对比分析了不加固处理、仅加筋垫层处理、复合地基、加筋垫层联合复合地基4种不同加固方案作用下地基的潜在滑移面、稳定安全系数、水平位移、沉降和桩土应力比的变化规律。研究结果表明,对比不同的加固方案,加筋垫层的应力扩散作用和筋土之间的摩擦作用,能够限制地基土的侧向变形,有效提高路堤的整体稳定性,减小路基的沉降和桩土差异沉降,充分发挥桩的强度和刚度。In order to apply geosynthetic reinforced cushion to different reinforcement schemes of road soft soil subgrade.The composite subgrade model was established by finite element numerical software and its rationality was verified by monitoring results obtained from field tests.The characteristics of potential slip surface,stability safety coefficient,horizontal displacement,settlement and pile-soil stress ratio of four kinds of subgrade without any treatment,treated with reinforced cushion only,composite foundation and treated with reinforced cushion combined composite foundation were analyzed comparatively.The results demonstrate that the stress diffusion and friction effects caused by reinforced cushion are able to constrain the lateral deformation of foundation,improve the overall stability of the embankment effectively,reduce the settlement of subgrade as well as between column and soil,exert the stiffness and strength of stone column fully.

关 键 词：土工合成材料 加筋垫层 加固方案 软土路基 

分 类 号：U416.1[交通运输工程—道路与铁道工程]