近接既有结构深大基坑隆起变形控制——以天津地铁5号线思源道站接建地下空间工程为例
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

TU463

基金项目:

国家重点研发计划资助(2018YFC0808700)、非饱和土力学特性及工程技术四川省高校工程研究中心开放基金项目资助(SC-FBHT2022-05)


Heave Deformation Control Method of Large-scale Deep Foundation Pit adjacent to Existing Structure
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    现行基坑支护规范抗隆起主要验算支护结构的稳定,无法满足拓建工程对基坑隆起变形的严格要求。论文从力学平衡和刚度控制的角度,阐明了深大基坑隆起的力学机理和隆起荷载的计算方法,提出了控制基坑隆起的新途径。研究表明:基坑隆起荷载与支护结构的入土深度、基坑深度、基坑宽度、土体内摩擦角和土体重度等因素有关;将基坑隆起问题转化为坑底加固土层的平衡问题,可以作为拓建工程基坑隆起控制的计算方法;坑底土体刚性加固和抗拔桩是控制基坑隆起变形的重要措施,坑底加固和抗拔桩应在基坑开挖前实施。

    Abstract:

    Anti uplift in the current foundation pit support code is mainly used to check the stability of the support structure, which cannot meet the strict requirements of the extension project on the upheaval deformation of the foundation pit. From the point of view of mechanical balance and stiffness control, this paper expounds the mechanical mechanism of deep and large foundation pit heave and the calculation method of uplift load, and puts forward a new way to control the uplift of foundation pit.The results show that the uplift load of foundation pit is related to soil penetration depth of supporting structure, depth and width of foundation pit, the internal friction angle and the weight of soil mass;The method of load balance of soil layer, which transforms the deformation of pit bottom into structural balance problem, can be used as the calculation method of foundation pit uplift control in extension engineering; The rigid reinforcement and anti pulling pile of the soil at the bottom of the pit are put forward to control the uplift deformation of the foundation pit, but this method should be implemented before the excavation of the foundation pit.

    参考文献
    相似文献
    引证文献
引用本文

赵伟,陈桥枫,张富国,等. 近接既有结构深大基坑隆起变形控制——以天津地铁5号线思源道站接建地下空间工程为例[J]. 科学技术与工程, 2023, 23(3): 1192-1198.
Zhao Wei, Chen Qiaofeng, Zhang Fuguo, et al. Heave Deformation Control Method of Large-scale Deep Foundation Pit adjacent to Existing Structure[J]. Science Technology and Engineering,2023,23(3):1192-1198.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2022-05-16
  • 最后修改日期:2022-11-25
  • 录用日期:2022-09-29
  • 在线发布日期: 2023-02-23
  • 出版日期:
×
律回春渐,新元肇启|《科学技术与工程》编辑部恭祝新岁!
亟待确认版面费归属稿件,敬请作者关注