既有建筑地下空间向下增层组合支护结构承载特性研究
DOI:
作者:
作者单位:

山东科技大学大学土木工程与建筑学院

作者简介:

通讯作者:

中图分类号:

TV551.4+2

基金项目:

山东省自然科学基金(ZR2019MEE027);国家自然科学基金项目(41372288)


Study on bearing characteristics of composite support structure with downward storey increase in underground space of existing buildings
Author:
Affiliation:

Shandong University of Science and Technolog

Fund Project:

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

    对既有建筑的地下空间进行向下增层改造是地下空间开发的一种新方法。在地下空间向下增层工程中既有支护桩和新增支护桩构成组合支护结构,采用模型试验和有限元分析两种形式对地下空间向下增层组合支护结构在整个增层开挖过程中的承载特性进行研究。研究表明,随着增层开挖的进行,既有支护桩和新增支护桩的承载情况处于动态变化之中。在增层开挖前期,既有支护桩承担荷载较大是主要受荷构件,而新增支护桩承担荷载较小起到嵌固作用;在增层开挖中期,既有支护桩和新增支护桩承担的荷载值增大,两者均为受荷构件;在增层开挖后期,新增支护桩的承载能力逐渐大于既有支护桩,既有支护桩逐渐发生破坏,新增支护桩为主要受荷构件。

    Abstract:

    It is a new method for underground space development to upgrade the underground space of existing buildings. The existing supporting piles and newly added supporting piles constitute the composite supporting structure in the underground space downward storey increasing project. The bearing characteristics of the composite supporting structure in the whole storey increasing excavation process were studied by model test and finite element analysis. The research shows that the bearing capacity of existing supporting piles and newly added supporting piles is in a dynamic change with the excavation of additional layers. In the early stage of layer adding excavation, the existing supporting piles are the main load bearing members, while the newly added supporting piles play a role in embedding. In the middle stage of adding layer excavation, the load value of existing supporting piles and newly added supporting piles increases, and both of them are loaded members. In the later stage of the excavation, the bearing capacity of the newly added supporting piles is gradually greater than that of the existing supporting piles, and the existing supporting piles are gradually damaged, and the newly added supporting piles are the main load bearing members.

    参考文献
    相似文献
    引证文献
引用本文

孔德森,孙添娇,赵新媛,等. 既有建筑地下空间向下增层组合支护结构承载特性研究[J]. 科学技术与工程, , ():

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:2021-11-05
  • 最后修改日期:2022-04-25
  • 录用日期:2022-04-30
  • 在线发布日期:
  • 出版日期:
×
关于近期《科学技术与工程》编辑部居家办公的说明
亟待确认的版面费信息