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隧道建设(中英文) ›› 2024, Vol. 44 ›› Issue (12): 2385-2392.DOI: 10.3973/j.issn.2096-4498.2024.12.008

• 研究与探索 • 上一篇    下一篇

基于内置树脂预应力中空锚杆的隧道锚固支护技术研究

邹文浩1 2, 马伟斌1 2 *, 刘艳青1 2, 张金龙1 2, 郭小雄1 2, 安哲立1 2,高红杰1, 2, 徐浩田1, 2   

  1. 1. 中国铁道科学研究院集团有限公司铁道建筑研究所, 北京 100081 2. 高速铁路轨道系统全国重点实验室, 北京 100081)

  • 出版日期:2024-12-20 发布日期:2025-01-11
  • 作者简介:邹文浩(1986—),男,江西南昌人,2016年毕业于中国铁道科学研究院,桥梁与隧道工程专业,博士,高级工程师,主要从事隧道及地下工程方面的研究和技术开发工作。 E-mail: zouwenhao0308@163.com。*通信作者: 马伟斌, E-mail: dwangfei@163.com。

Tunnel Anchorage Support Based on Prestressed Hollow Bolt With Built-in Resin

ZOU Wenhao1, 2, MA Weibin1, 2, *, LIU Yanqing1, 2, ZHANG Jinlong1, 2, GUO Xiaoxiong1, 2AN Zheli1, 2, GAO Hongjie1, 2, XU Haotian1, 2   

  1. (1. Railway Engineering Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing 100081, China; 2. State Key Laboratory of Highspeed Railway Track System, Beijing 100081, China)

  • Online:2024-12-20 Published:2025-01-11

摘要: 为解决软弱围岩隧道树脂锚杆施工工艺复杂、工效低的问题,在分析传统树脂锚杆局限性的基础上,针对性提出2种内置树脂预应力中空锚杆技术方案; 采用工作原理分析、结构设计以及现场试验等方法,对其在软弱围岩中的适用性进行研究。研究结果表明: 1)针对一般破碎围岩工况的内置树脂预应力中空锚杆安装合格率为81.9%,高于传统树脂锚杆的50%合格率; 2)内置树脂预应力中空锚杆杆长为3 m4 m的净作业时间分别为4.62 min5.55 min 3)考虑台车进场准备时间等因素,内置树脂预应力中空锚杆杆长为3 m4 m的综合作业时间分别有望控制在6.0~6.5 min7.0~7.5 min 4)针对极破碎围岩以及预应力长锚杆工况的自进式内置树脂预应力中空锚杆能够实现“自进+预紧”的功能,对围岩进行及时支护,同时施工工效与普通自进式锚杆相当。

关键词: 铁路隧道, 内置树脂, 预应力中空锚杆, 锚固支护, 软弱围岩, 自进式锚杆

Abstract: The construction of resin anchor bolts in soft surrounding rock tunnels is complex and inefficient. To address the limitations of traditional resin bolts, two technical schemes involving prestressed hollow bolts with built-in resin are proposed. Their applicability in soft surrounding rocks is examined via working principle analysis, structural design, and field testing. The results reveal the following: (1) Under normal broken surrounding rock conditions, the installation qualification rate of prestressed hollow bolts with built-in resin is 81.9%, significantly higher than that of traditional resin bolts (50%); (2) The net operation times for 3 m and 4 m prestressed hollow bolts with built-in resin are 4.62 min and 5.55 min, respectively; (3) Considering the preparation time for the trolley, the total operation time is controlled within 66.5 min and 77.5 min, respectively; (4) The self-drilling prestressed hollow bolt with built-in resin achieves self-drilling and pretightening for severely broken surrounding rocks through long prestressed bolts, enabling timely support of the surrounding rock. The construction efficiency of this type of bolt is comparable to that of traditional bolts.

Key words: railway tunnel, built-in resin, prestressed hollow bolt, anchorage support, soft surrounding rock, self-drilling bolt