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A Jacking Force Study of Curved Steel Pipe Roof in Gongbei Tunnel:Calculation Review and Monitoring Data Analysis
| 题名： | A Jacking Force Study of Curved Steel Pipe Roof in Gongbei Tunnel:Calculation Review and Monitoring Data Analysis |
| 正文语种： | 中文 |
| 关键词： | Curved Steel Pipe Jacking,Jacking Force Full Contact Model Partial Contact Model Cutterhead Resistance Frictional Resistance |
| 摘要： | Jacking force is one of the crucial parameters for pipe structure design,selection of pipe jacking machine and shaft structure design during jacking process.To predict the jacking force more accurately,this paper summarizes four calculation methods of curved jacking force.The Japan Micro Tunneling Association (JMTA) Method is based on Terzaghi arching theory with full contact between pipe and soil.While the Hertz contact method is based on the partial contact model.Shimada method and Persson contact method consider the influence of frictional resistance of pipe-soil and pipe-mud concurrently in the stable condition of excavation cavity.By field monitoring of jacking force data in different types of soil and cover depth in the curved pipe jacking roof of Gongbei tunnel,the cutterhead resistance,dynamic and static frictional resistance have been analyzed.Also,the additional frictional resistance caused by stoppage effect has been presented.The results show that the mud pressure is more convenient to calculate the cutterhead resistance than active soil pressure.The Persson contact model is applicable to calculate the friction in stable condition of excavation cavity while the Shimada model is capable of predicting frictional resistance values for unstable condition. |
| 会议日期： | 20181024 |
| 会议举办地点： | 武汉 |
| 会议名称： | 第九届管道工程与非开挖技术国际研讨会 |
| 出版日期： | 2018-10-24 |
| 母体文献： | 第九届管道工程与非开挖技术国际研讨会论文集 |
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