| With the development of urban economy,subway construction,with its scale which is gradually expanding,occupies an important position in the infrastructure projects in China.The subway construction promotes economic development.Meanwhile,the construction of the commercial projects along the line has adverse effects on the safety of subway operation.Therefore,it is of great significance to monitor the subway tunnel automatically and get clear about the safety of the tunnel structure in time.This thesis is based on the research of applying SOKKIA measurement robot in Wuhan Metro tunnel monitoring.What follows is the detailed research content.Firstly,the research background and significance are introduced.And the research achievements at home and abroad about measurement robots are summarized.In addition,the composition,measurement principles and application key points of the automatic deformation monitoring system are introduced in detail.According to the characteristics of the subway tunnel monitoring environment,the free station setting method and polar coordinate method are proposed to determine the three-dimensional coordinates of the working base station and monitoring points.Furthermore,the geological situation and position relationship of the project are introduced in detail,and the feasibility of the measurement robot’s monitoring in the tunnel is analyzed.The special implementation scheme of the tunnel monitoring is formulated,and the implementation process of the automatic deformation monitoring is systematically described.And he deformation monitoring data are corrected and analyzed.The measurement results meet the requirements of tunnel monitoring accuracy.The partial deformation characteristics of the tunnel structure are analyzed.The maximum deformation point occurs at the bottom of the excavation of the foundation pit,which is basically consistent with the deformation of the surrounding soilcaused by the progress of the site construction.And the target of subway tunnel monitoring is achieved.Finally,this paper analyzes the influence of foundation pit excavation and construction dewatering on the deformation of tunnel structure,and puts forward reasonable suggestions on the construction of projects surrounding subways and subway maintenance. |
