超前锚杆短循环法在砂砾石隧洞挂口施工中的应用

Application of Advanced Anchor Short Cycle Method to Constructing Tunnel Branch Portal in Sandy and Gravel Formation

摘要:

介绍了在支洞工程的施工中，利用超前锚杆短循环法解决在砂砾石地层中挂口难题的具体措施和关键技术，实现了工程自身及周围国道公路、升压站等重要建筑物的安全技术要求。

Abstract:

The advanced anchor short cycle method used for solving the technical problems encountered while constructing tunnel branch portal in sandy and gravel formation is introduced. Safety technical requirements referring to state run road, pressure lifting station and the important buildings nearby are met.