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力学与实践 ›› 2010, Vol. 32 ›› Issue (5): 67-71.doi: 10.6052/1000-0879-lxysj2008-458

• 应用研究 • 上一篇    下一篇

刚性根式基础水平承载性能分析

胡丰,龚维民,殷永高,童小东,单建   

  1. 东南大学土木学院桥隧系
  • 收稿日期:2008-10-10 修回日期:2009-11-11 出版日期:2010-10-08 发布日期:2010-09-07

ANALYSIS OF LATERAL BEARING CAPACITY OF RIGID ROOT-FOUNDATION

龚维民,殷永高,童小东 and 单建   

  • Received:2008-10-10 Revised:2009-11-11 Online:2010-10-08 Published:2010-09-07

摘要: 根据Winkler地基梁理论, 分析根式基础及根键水平受力特性, 并建立计算模型. 利用 载荷传递法推导根式基础弹性解答, 计算其水平向承载性能, 获得井身位移、弯矩、剪力和 土反力随深度的分布规律. 结果表明, 根式基础承载性能优于沉井基础, 可使顶部水平位移 减少35%~45%, 承载力提高45%~55%. 载荷传递法结果在弹 性范围内与试验数据接近, 故可用于工程计算.

Abstract: Based on the Winkler beam theory, the working mechanism and the bearing capacity of a lateral-loaded root-foundation are investigated, with a model of calculation. The elastic solution of the lateral-loaded root-foundation is obtained by using the load transfer method. The lateral bearing capacity is calculated, and the distributions of the lateral displacement, flexural moment, shear force and soil resistance of the root-foundation are obtained. The results show that the lateral bearing capacity of the root-foundation is better than the traditional caisson foundation, with the top lateral displacement being reduced by 35%~45% and the lateral bearing capacity being increased by 45%~55%. The calculated results are in good agreement with the test results in the elastic range, therefore, the load transfer method can be applied in the engineering calculation of root-foundations.