Advantages and risk control of long-distance pipe jacking construction technology for water supply and drainage
In order to study the advantages of long-distance pipe jacking construction technology for water supply and drainage,potential risks and countermeasures for risk management and control,this paper,in combination with the part of sewage pipe network with the project pile number of 2K+487~6K+476 in the southwest section of Suzhou,adopts large-scale equipment such as pipe jacking machine,propelling machine and soil scraper,and obtains the monitoring data in the whole construction process by means of detection data analysis.By analyzing the data,the following con-clusions are drawn:the variation trend of lateral surface deformation and longitudinal surface de-formation is consistent,and with the increase of pipeline jacking distance,the surface deformation presents a larger trend;When the jacking distance of pipe jacking increases from 5m to 10m,the increase of surface deformation is very small,which is 0.5 mm;When the jacking distance of pipe jacking increases from 10 m to 15 m,the friction between pipe and soil suddenly increases,and the pipe begins to be subjected to groundwater pressure,with the largest surface deformation of 2.3mm;When the jacking distance of pipe jacking increases from 15 m to 50 m,the surface de-formation tends to increase,but the surface deformation is decreasing,which is 0.3 mm.
Water supply and drainagePipe jacking constructionPotential risksRisk management and control