富含水砾砂层中顶管隧道水下贯通技术

Underwater Penetration Technology of Pipe Jacking Tunnel in High Water Gravel Sand Layer

顶管隧道在富含水、渗透性强、地质松散的砾砂层中贯通，容易发生涌水涌砂风险，造成地面塌陷事故，甚至存在工程失败的可能。以富春江顶管工程为例，应用水下接收顶管机和隧道贯通技术，采取接收洞门周围和钢筋混凝土管节注浆封水技术，有效控制了施工风险，为成功实现顶管隧道在富水砾砂层中的安全贯通提供了一种有效方法。

During the penetration of pipe jacking tunnel through the gravel strata with abundant water,strong permeability and loose geology,it was easy to cause the risk of water and sand gushings,result in ground collapse accidents,and even the possibility of engineering failure.This paper takes the Fuchun River Pipe Jacking Project for example;the water receiving pipe jacking machine,tunnel penetration technology and receiving portal around and reinforced concrete pipe grouting technology were used;the construction risk was effectively controlled.It provides an effective method for the safety of pipe-jacking tunnel in water-rich gravel sand layers.