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Research and Implementation of Monitoring and Early Warning System of Deep Foundation Pit

Zhou Erzhong1,Liu Xing1,Qing Zhou2(1.College of Civil Engineering,Chongqing University,Chongqing 400045,China; 2.Ranken Railway Construction,Ltd,Chengdu 610015,China)  
The excavation process of deep foundation pits will lead to the structural instability and deformation of the supporting structures and surrounding environment.And so,during the excavation processes of the deep foundation pits,in order to get dynamic monitoring data in real time and to do analysis of the on-site construction monitoring data timely,the related monitors must do monitoring on-site.When getting the changes in value of the supporting structure and surrounding environment,we could take remedial measures immediately to ensure safety once some unusual circumstances were found.The essay introduces the monitoring and early warning system of the deep foundation pit,using Leica TPS1200+measurement robot and based on the development platform of VB6.0 and SQL2005 database.The system realizes the communication between the robot and computer for the control by GeoCOM interface and a wireless transmission.The wavelet analysis is used to process monitoring data,and finally the utility software system is finished with a set of simple operation interface,perfect function,with real time,intelligent and dynamic monitoring.The monitoring and early warning system of the deep foundation pit achieves good monitoring results effectively in the project of Qingdao subway deep foundation pit,and gets the desired results.
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