摘要
与传统重力式基础、桩基础相比,桶形基础具有结构形式简单、造价低、便于运输、可重复使用等优点,而且其在不良软黏土地基中有不可替代的优势。基于有限元法和极限平衡法分析了一种新型桶形基础的水平极限承载力,并将两者结果进行对比,结果表明:通过有限元分析,得出该新型桶形基础以转动破坏为主,当处于极限平衡状态时,桶体后侧与土体发生分离;桶形基础的水平极限承载力随着黏土不排水剪切强度的增大而增大;在有限元分析的基础上,通过极限平衡分析法得出计算该桶形基础水平极限承载力的理论求解公式,并通过与有限元计算结果进行对比验证了该公式的适用性。
Compared with the traditional gravity foundation,pile foundation,bucket foundation has simple structure,low cost,convenient transpor-tation,can be reused,and the bad in soft clay ground has irreplaceable advantages. Based on the finite element analysis and limit equilibrium anal-ysis of a new type of horizontal limit bearing force of bucket foundation,the results were compared. The results show that：through the finite element analysis,the model of bucket foundation is given priority to with rotational failure,when in the state of limit equilibrium,the barrel body side and soil separation occurs;and with the increase of undrained shear strength of clay increases the ultimate bearing capacity of bucket foundation;based on the finite element analysis,the limit equilibrium analysis method of theoretical formula calculation of bearing capacity of the bucket foundation level limit,and with the finite element analysis results,verify the applicability of the formula.
出处
《人民黄河》
CAS
北大核心
2014年第3期96-98,共3页
Yellow River
基金
国家重点基础研究发展计划项目(2011CB013605-2)
关键词
桶形基础
水平极限承载力
有限元分析
极限平衡分析
剪切强度
bucket foundation
horizontal bearing capacity
numerical analysis
limit analysis method
shear strength
