在“一带一路”政策的引领之下,城市的发展越来越迅速,进而促使建筑行业的发展.由于土地资源紧缺,不仅使得人们的住宅问题难以解决,还使得交通拥堵现象更加严重.这些都影响着城市化发展的进程.在这种情况下,人们想要缓解交通带来的不便,只有从地下空间着手.于是地铁作为新兴的交通方式孕育而生了.地铁的建设不仅仅减缓了交通堵塞现象,还提升了所在区域的生活水准,是一个城市发展的代表.地铁在带来方便的同时,也带来一定的困扰.本文以从隧道施工的变形影响因素、地表沉降特征等角度,从以下几个方面论述地铁隧道施工对既有桥梁变形的控制.%Under the guidance of the policy of "One Belt and One Road",the development of the city is becoming more and more rapid,which leads to the development of the construction industry.Due to the shortage of land resources,people's housing problem is difficult to solve,and the traffic congestion becomes more serious.In this case,people start to consider the underground space to ease the inconvenience of traffic.So the subway as a new way of transport gave birth.Subway construction not only slowed down the traffic jam phenomenon,but also enhance the living standards,so it has become a representative of urban development.Subway brings convenience at the same time,also brings some trouble.In this paper,from the perspective of the factors affecting the deformation of the tunnel construction and the characteristics of surface subsidence,the deformation control of the existing bridge in subway tunnel construction is discussed.
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