For Ground Buildings Monitoring Measurement And Safety Assessment During Urban Tunnel Construction

With the rise of chinese economic development and social progress.Densely populated and traffic congestion in centers of large cities restrict development.Always, we expand the urban land to address these issues.But with the increase in population. these measures are not in line with Chinese national conditions. For sustainable development, we will focus on expanding the underground space development. Tunnel construction impacts on ground-level structures,often cause damage to the floor of the building.However,domestic scholars have very little research in this area.Therefore, this article is important.This article will rely on Yuzhong tunnel project, useing the literature research, numerical methods and engineering practices.First,consulting the related literature,including both at home and abroad research achievements about nearly by building monitoring, engineering experience and research methods, and then use the finite element software MIDAS GTS- to simulate the excavation of tunnel cavern stage, tunnel hole section and the corresponding surface and the influence of superstructure, and the surface subsidence, and building inclination.According to the current research,and reference other scholars’ research results,studying and summarizing the influence of between tunnel excavation and the earth buildings.Constructing city tunnels is an effective way to solve the problem of strained land and crowded traffic, but the tunnels constructions have much impact on environment and public.Surface subsidence during Construction is a major cause of damage to the building ground,it causes Very large economic losses.In order to study the interaction with the ground floor and the tunnel construction. Conduct safety assessments on neighboring buildings and propose corresponding avoidance measures, this text eollected exhaustive materials about the land subsidenee caused by the tunnel construct and the building security risk, carried on numerieal simulation and theoretical analyze obtained some useful laws for offering the guidance in similar project.Chongqing Yuzhong paper selected as the research object connecting tunnels, to impact on the ground focus on building subsidence, generalize analytical method and Procedure of the building security risk, discuss the control measure of the risk in the stage of eonstruction.The maine contents are as follows: ①Topics basis, content of the study and method; ②The interaction with the ground floor and the tunnel construction; ③The content and methods of surface buildings measurement.