地铁盾构近距离下穿既有建筑结构影响分析

›› 2018, Vol. 32 ›› Issue (2): 151-153.

地铁盾构近距离下穿既有建筑结构影响分析

蒋颖, 刘华, 何振华

(中国市政工程中南设计研究总院有限公司，武汉 430010)

收稿日期:2017-12-20 修回日期:2018-01-02 出版日期:2018-04-30 发布日期:2018-05-09
作者简介:蒋颖(1981-)，男，高级工程师，研究方向为城市轨道交通结构设计。
基金资助:
国家自然科学基金（51404240）

Effect of Shielded Excavation in the Metro Tunnel on the Adjacent Existing Building Structures

JIANG Ying, LIU Hua, HE Zhen-Hua

(Central Southern China Municipal Design & Research Institute Co., Ltd., Wuhan 430010)

Received:2017-12-20 Revised:2018-01-02 Online:2018-04-30 Published:2018-05-09

摘要/Abstract

摘要： 建筑结构与城市地铁交叉时，地铁盾构区间施工对建筑结构安全产生一定的影响，合理选择施工顺序及设计方案是保证先期施工结构安全的有效措施。通过武汉地铁11号线盾构区间对即将施工的某些建筑结构的安全影响进行分析，比较了与底板相连的桩基础位于盾构区间上方的原设计方案与采用桩+梁结构、桩端位于盾构区间下方的优化方案。结果可知，采用桩+梁结构、桩端位于盾构区间下方的设计方案更能保证上部结构的安全，该方案合理可靠。

关键词: 地铁盾构, 建筑结构, 桩梁结构

Abstract: When the proposed shielded tunnel excavation is close to or underneath the existing or proposed building structures, the safety of these buildings is very important and shall be warranted. The reasonable design and excavation sequence are the effective aspects of ensuring the building structure safety. This paper presents a case history of safety evaluation of Wuhan Metro No. 11 Line shielded excavation on the proposed BMW and Mercedes vehicle service buildings. Two different approaches, the shortpiled raft foundations with pile tip above the shielded excavation zone and the long pile supported ground beams with pile tip below the shielded excavation zone are compared. The results indicate that the long pile supported ground beam approach is a better way ensuring the building safety.

Key words: Shielded Excavation, Building structures, Pile Supported Ground Beams

蒋颖, 刘华, 何振华. 地铁盾构近距离下穿既有建筑结构影响分析[J]. , 2018, 32(2): 151-153.

JIANG Ying, LIU Hua, HE Zhen-Hua. Effect of Shielded Excavation in the Metro Tunnel on the Adjacent Existing Building Structures[J]. , 2018, 32(2): 151-153.