大断面深埋岩溶隧道塌腔处理技术探究

Research on Treatment Technology for Collapse Cavity of Large Section Deep Buried Karst Tunnel

随着我国高速公路的发展,在岩溶地区修建隧道工程日益增多。施工过程中若处理不当,极易造成塌方、突泥涌水、地表塌陷、洞身失稳等工程灾害,甚至威胁到现场施工人员的生命安全。依托新余市绕城改建工程(环城路)花鼓山隧道工程,采用反压回填、空腔填充轻质混凝土、加强初期支护、围岩注浆加固的方式,攻克岩溶隧道塌腔施工过程中塌方、突泥涌水、地表塌陷等难题。

With the development of highways in China,tunnel construction in karst areas is increasing.If it is not properly handled during the construction process,it will easily cause engineering disasters such as landslides,muddy water,surface subsidence,and instability of the tunnel,and even threaten the safety of the construction workers on site.This paper relies on the Huagushan tunnel project of Xinyu City Reconstruction Project(Huancheng Road),adopting back pressure backfilling,cavity filling lightweight concrete,strengthening initial support and surrounding rock grouting reinforcement to overcome the construction process of karst tunnel collapse cavity.Problems such as landslides,muddy waters,and surface subsidence.