盾构隧道断面椭圆度拟合方法研究

Research on Fitting Method of Section Ovality in Shield Tunnel

研究了如何对盾构隧道断面椭圆度数据进行快速采集和处理,以减少测量工作量并减小对隧道抢险、正常施工的影响。现场数据采集完成后使用Matlab软件对数据进行快速处理,及时发现隐患,对以后盾构隧道断面椭圆度测量具有一定的借鉴意义。新建珠海市区至珠海机场城际轨道交通项目横琴隧道二工区包含4条盾构隧道,施工期间使用该方法进行相关测量工作,为设计单位、抢险作业等及时提供了隧道变形数据。

This paper studies how to quickly collect and process data of section ellipticity in shield tunnel so that the impact on the tunnel rescue and normal construction can be reduced.After completion of the field data collection,the data are processed quickly by Matlab software and the hidden danger found out in time,which can help the measurement of section ellipticity in shield tunnel in future.The second working area of the newly built intercity rail transit project,from Zhuhai urban area to Zhuhai airport,consists of four shield tunnels.Relevant measurement during the construction have been finished by this method and provided tunnel deformation data for design institute and rescuing operation in time.