隧洞预应力混凝土衬砌施工技术应用

Construction technique of prestressed concrete tunnel lining

针对高水头和隧洞围岩较破碎、埋深较浅等情况,文章着重介绍了无粘结预应力混凝土衬砌施工、无粘结预应筋的张拉、防腐的施工工艺。应用实践证明:采用后张法双圈无粘结预应力混凝土衬砌施工技术,可以解决隧洞衬砌抗裂问题,并能大幅度降低工程造价。

According to the high head and broken and shallow tunnel surrounding rock,The paper mainly introduces the prestressed concrete lining construction without bond,stretch-draw of prestressed tendon without bond and construction technique of anticorrosion.The result shows that prestressed concrete lining construction using post-tensioning method two-loop without bond could solve the problem of anti-crack of tunnel and largely decrease the cost of project.