涔天河1#泄洪洞龙落尾施工技术研究

Research on the Construction Technology of Longluo Tail of CentianRiver1#Flood Discharge Tunnel

涔天河1#泄洪洞龙落尾段通过零挖进洞,大管棚超前支护,围岩预固结灌浆,边坡抗滑桩和预应力锚杆(索)等综合技术手段有效的解决了在破碎岩体浅埋偏压大断面隧洞施工的难题,该工程的成功给后续类似工程施工也积累了成功经验,提供了参考依据。同时该工程与大学科研单位进行合作,采用内外安全监测数据,利用大型三维计算模型演算对处理措施进行变形预测,从而指导施工的方法,也值得类似工程应用和推广。

The Longluo tail section of the 1#flood discharge tunnel in the Centian River has effectively solved the problem of shallowburied and eccentric large cross-section tunnel construction in fractured rock mass through comprehensive technical measures such as zero excavation,advanced support of large pipe sheds,pre consolidation grouting of surrounding rock,slope anti-skid piles,and prestressed anchor rods(cables).The success of this project has also accumulated successful experience and provided reference basis for similar engineering construction in the future.At the same time,this project collaborates with university research units,using internal and external safety monitoring data,and using large-scalethree-dimensional computational models to predict deformation of treatment measures,whichguiding construction methodsand isalso worth applying and promoting in similar projects.