土工基础

›› 2014, Vol. 28 ›› Issue (6): 67-72.

• 工程实录 • 上一篇    下一篇

基坑开挖过程中多撑式支护结构变形研究

谯勇军1，柯结伟2，庞有师3，闫春雷4   

  1. （1.南京市栖霞区市政设施综合养护管理所，南京 210000；2.73669部队，南京 211131；
    3.南京博岩环境工程有限公司，南京 210007；4.东海舰队后勤部，浙江宁波 315040)
  • 收稿日期:2013-12-16 出版日期:2014-12-25 发布日期:2015-01-12
  • 作者简介:谯勇军(1973-)，男，助理工程师，研究方向为市政设施维护。
  • 基金资助:

    江苏省“六大人才”高峰发展基金项目(50528512)

Deformations of the Supporting Structures in Deep Excavationwith Multiple Horizontal Struts

QIAO Yongjun1, KE Jiewei2, PANG Youshi3, YAN Chunlei4   

  1. (1. Nanjing Xixia District Municipal Infrastructure Maintenance Division, Nanjing, 210000;
    2. Army 73669 Division, Nanjing, 211131;
    3. Nanjing Boyan Environment Engineering Co., Ltd., Nanjing, 210007;
    4. Logistic Division of Navy East China Sea Fleet, Ningbo, 315040)
  • Received:2013-12-16 Online:2014-12-25 Published:2015-01-12
  • About author:Deformations of the Supporting Structures in Deep Excavation with Multiple Horizontal StrutsDeformations of the Supporting Structures in Deep Excavation with Multiple Horizontal Struts

摘要： 为掌握基坑开挖过程中支护桩力与位移的变化规律及其相互关系，在弹性地基梁计算理论的基础上，考虑桩-土相对位移影响，根据支护桩水平支撑的设置情况将基坑的开挖分解为不同阶段，结合初参数法推导得出了开挖过程中支护桩水平位移、转角位移、弯矩和剪力沿桩身分布的计算公式。工程实例表明：计算值与实测值接近，该方法能很好的计算出支护桩在开挖过程中力与位移的变化规律，对基坑工程的设计、施工和施工过程中的监测具有指导意义。

关键词: 基坑, 开挖, 结构变形, 水平支撑

Abstract: The deep excavation with multiple horizontal struts has been numerically analyzed using beam theory on elastic soil foundations and considering the influence of the pilesoil displacement. The force in the supporting pile with the change of horizontal displacement is also discussed in the paper. The analysis simulates the different stages of the excavation based on the location and the installation of the struts. The horizontal displacement, rotational deformation and the shear force as well as bending moment along the supporting piles are obtained. It is concluded that the predicted results are close to the observed values and the proposed method can provide a reasonable values of the force and deformation in the supporting piles during various stages of the excavation.

Key words: Foundation Pits, Deep Excavations, Deformation of Supporting Structure, Horizontal Struts