Vibration response analysis of adjacent pile foundations during tunnel blasting construction under sensitive conditions
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 27 Project as the background,a numerical analysis is conducted on the vibration response of viaduct pile foundation of the adjacent Line 1 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 1 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.
万方数据
维普
