摘要
基于土工格室与碎石桩的作用机理,探讨土工格室垫层+碎石桩复合地基的承载机理,分析土工格室垫层对碎石桩复合地基承载力的提高作用。针对格室垫层与碎石桩相互作用构成荷载传递和支撑体系提高软基承载力的特点,提出该类复合地基承载力的简单计算方法,并通过室内模型试验加以验证。研究结果表明,实测的因土工格室垫层设置引起的地基承载力增值与本文方法计算值较吻合;在荷载作用后期,土工格室筋材拉力向上分力引起的复合地基承载力提高,在工程应用中宜予以考虑。
Based on the discussion of the working mechanisms of geocell reinforced mattress and gravel pile composite foundation, the working mechanism of the composite foundation formed by geocell mattress and gravel pile composite foundation was discussed. According to the working characteristic of this working system, a new bearing capacity calculation method was proposed and verified by the laboratory study. The creasment of foundation bearing capacities which is obtained from the test agree with the results show that the inresults calculated by the present method. The test and theoretical study indicates that the increasment of bearing capacity foundation of enhanced by the contribution of the vertical component of the tensile force of geocell reinforcement is great, especially when the upper load is large. So this effect should be taken into account in engineering design.
出处
《铁道科学与工程学报》
CAS
CSCD
2009年第3期17-21,共5页
Journal of Railway Science and Engineering
基金
国家"863"计划项目(2006AA11Z104)
关键词
复合地基
土工格室
碎石桩
承载机理
承载力计算
composite foundation
geocell
gravel pile
working mechanism
bearing capacity calculation
