软岩隧道开挖大变形控制技术分析

摘  要：大变形问题是软岩隧道施工中的常见病害，若处理不当会严重影响隧道修建成本和工期。该文结合工程实例从加强工程预报、锚杆施工控制、预留变形量、双层初期支护和刚柔结合5个方面梳理总结软岩隧道施工大变形控制方法，可为类似工程提供借鉴和参考。

关键词：软岩大变形；预报；锚杆；预留变形量；初期支护；刚柔结合

中图分类号：U455 文献标志码：A          文章编号：2095-2945（2023）28-0170-04

Abstract： Large deformation is a common problem in soft rock tunnel construction. If not handled properly， it will seriously affect the cost and time-limit of tunnel construction. Based on engineering examples， this paper summarizes the large deformation control methods of soft rock tunnel construction from five aspects， including strengthening engineering prediction， bolt construction control， reserved deformation， double-layer initial support， rigid and flexible combination， which can provide reference for similar projects.

Keywords： large deformation of soft rock; prediction; bolt; reserved deformation; initial support; rigid-flexible combination

随着我国铁路、公路建设不断向山区延伸，隧道工程建设常不可避免地要穿越高地应力软弱围岩区。（剩余5341字）