浅谈隧道穿越岩性分界面石质塌方处理措施

Discussion on Stone Landslide Treatment Measures Crossing through the Lithologic Interface of Tunnels

由于地质构造作用以及风化作用,隧道多存在地质条件复杂地段。当隧道穿越岩性分界面,处理不到位很容易导致隧道塌方,给隧道施工带来安全质量隐患。文章以靖西至龙邦高速公路乐村隧道穿越岩性分界面导致大体积塌方为例,介绍了隧道区地质情况和塌方情况,分析了塌方原因,提出了利用管棚并配合超前注浆小导管的支护处理方法,并阐述了塌方处理效果。

Due to geological structure and weathering roles,the tunnel has many sections with complex geological conditions.When the tunnel passes through the lithologic interface,the bad treatment can easily lead to tunnel collapse,posing the safety and quality risks to the tunnel construction.With the large-scale landslides of Lecun Tunnel in Jingxi-Longbang Expressway caused by passing through the lithologic interface as an example,this article introduced the geological conditions and landslides in the tunnel area,analyzed the causes of landslides,proposed the supporting treatment method by using the pipe sheds and advanced grouting small-duct,and described the effect of collapse treatment.