某岩溶地区隧道溶洞处理关键技术研究

Research on Key Technologies for Treating Karst Caves in a Tunnel in a Karst Area

摘要:

溶岩地质对于桥梁、隧道桩基础的施工与设计存在较大的影响和制约,本文以广州市设计之都地下环路工程为依托,对在敏感区域大型溶洞群下的桩基施工进行探讨,通过桩基施工前进行溶洞预处理,施工完成后再进行后注浆处理等措施,为同类项目提供一种可供参考的经验做法。

Abstract:

Karst geology has a great influence and restriction on the construction and design of pile foundation of bridges and tunnels. Taking an underground ring road project in Guangzhou as the background, the construction problems of pile foundations beneath the large karst caves in sensitive areas are discussed and studied. The measures such as the pretreatment of karst caves and post-grouting treatment after construction are taken, which provide the reference and experience for the similar projects.