摘要
Abstract
With the increase of urban traffic network density,more and more new projects are adjacent to existing subway sta-tions.The deformation of subway station has strict control standards,which puts forward higher technical requirements for the construction of adjacent foundation pit projects.Taking the bridge and culvert foundation pit project adjacent to the sub-way station as an example,this paper introduces the influence of bridge and culvert foundation pit construction on the sur-rounding environment,self-deformation and station structure deformation under different supporting pile diameters.The calcu-lation results show that:①with the increase of the diameter of the supporting pile,the ground settlement and pile deforma-tion decrease sharply,but when the diameter of the supporting pile reaches a certain value,the effect of increasing the pile di-ameter is no longer significant,which has limited effect on reducing the ground settlement and pile deformation;②when the pile diameter of the supporting pile is increased,the decrease of ground settlement is larger than that of pile displacement,and the decrease in horizontal displacement of the station is larger than that in vertical displacement,and the former is usually 2.5～3 times as much as the latter;③the diameter of the supporting pile is determined by combining the ground settlement,pile deformation,horizontal displacement and vertical displacement of the subway station.The relevant conclusions can pro-vide some reference for similar engineering construction.关键词
桥涵/基坑/支护桩直径/MIDASKey words
bridges and culverts/foundation pit/supporting pile diameter/MIDAS分类
交通工程
