复杂地层长距离过江顶管关键技术研究

复杂地层长距离过江顶管工程由于不可遇见的因素及长距离顶进,往往伴随高风险与高难度.需采取相应的技术措施来应对及规避风险。以某过江顶管工程为例.分析施工过程中遇到的普遍问题.有针对性地采用改良式破岩机头、设置中继间,洞口加固,合理设置泥浆减阻及顶进纠偏等工艺,确保了工程的顺利完工,验证了技术措施的合理性,为长距离过江顶管工程提拱有益的参考。

Study on Key Technology of Long-distance River-crossing Pipe Jacking in Complex Stratum

The long-distance river crossing pipe jacking projects in complex stratum are often accompanied with the high risk and high difficulty because of unseen factors and long-distance jacking.The relevant technical measures are required to take for dealing with and avoiding the risks.Taking a river-crossing pipe jacking project as an example,this paper analyzes the general problems met in the construction process.The targeted technologies of using the modified rock breaking headpiece,setting the relay room,reinforcing the hole,reasonably setting the mud drag reduction and correcting the jacking error are used to ensure the smooth completion of the project and to verify the rationality of technical measures,which provide the benefit reference for the long-distance river-crossing pipe jacking projects.