摘要
新建成都至兰州铁路红桥关隧道进口D2K253＋935-D1K255＋040段穿越泥石流堆积体,施工中遇到了支护体系变形等问题。文章分析了支护体系破坏机理和特征,提出了采用＂锚桩＂结构等施工控制措施。工程实践表明,＂锚桩＂结构可以增强初期支护体系的纵向刚度和承载能力,有效控制初期支护体系的整体沉降和变形,确保隧道施工安全和提高隧道施工掘进效率。
The deformation mechanism and characteristics of the support structure of the D2K253＋935~D1K255＋040 section of the Hongqiaoguan tunnel on the Chengdu-Lanzhou railway, which passes through a debris flow fan,are discussed in this paper. Additionally, the control techniques and measures for the problems of deformation en-countered during construction of the tunnel are presented. The practice results show that adopting an anchoring pilemay enhance the longitudinal stiffness and bearing capacity of the primary support and control its settlement and de-formation, thereby guaranteeing construction safety and improving driving efficiency.
出处
《现代隧道技术》
EI
CSCD
北大核心
2016年第3期189-194,共6页
Modern Tunnelling Technology
关键词
隧道
泥石流堆积体
支护变形
锚桩结构
Tunnel
Debris flow fan
Support deformation
Anchoring pile
