Sinohydro Bureau 7 Co. , Ltd.

大型地铁车站多位于城市中心区域,其邻近建筑物分布较为密集,隧道爆破开挖施工条件较为苛刻,因此,确保邻近建筑物在爆破荷载影响下的安全是施工过程中至关重要的问题。本文以重庆轨道交通27号线工程磁器口站为背景,对车站主体爆破开挖引起的邻近1号线高架桥墩桩基振动响应进行了数值分析,借助ANSYS/LS-DYNA软件建立了三维有限元计算模型,分析不同开挖形式、不同水平距离下隧道爆破施工对邻近1号线桥墩桩基的振动响应规律,确定了不同开挖形式下车站主体与桥墩桩基的安全水平距离,得到了敏感条件下基于安全允许振速的隧道爆破施工参数,可为类似工程提供参考。

Large subway stations are mostly located in urban central areas, with densely distributed adjacent buildings, and tunnel blasting and excavation construction conditions are relatively harsh. Therefore, ensuring the safety of adjacent buildings under the influence of blasting load is a crucial issue during construction process. Taking the Ciqikou Station of Chongqing Rail Transit Line Project as the background, a numerical analysis is conducted on the vibration response of viaduct pile foundation of the adjacent Line caused by blasting and excavation of the main body of the station. A three- dimensional finite element calculation model is established with ANSYS/ LS-DYNA software to analyze the effect of different excavation forms and different horizontal distances on the vibration response rules of tunnel blasting construction to the adjacent Line bridge pier pile foundation. The safe horizontal distance between the station main body and the bridge pier pile foundation under different excavation forms is determined, and the tunnel blasting construction parameters based on safe allowable vibration speed under sensitive conditions is obtained. This can provide a reference for similar projects.

王福兴,张宾,曹寰宇,等.敏感条件下隧道爆破施工中邻近桩基的振动响应分析[J].煤矿爆破,2024,42(4):12-18.

WANG Fuxing,ZHANG Bin,CAO Huanyu,et al. Vibration response analysis of adjacent pile foundations during tunnel blasting construction under sensitive conditions[J]. Coal Mine Blasting,2024,42(4):12-18.