云南德钦石膏质岩隧道衬砌支护设计方案研究
Research on Lining Support Design Scheme for Gypsum Rock Tunnel in Deqin,Yunnan
漆江1
作者信息
- 1. 国家林业和草原局西南调查规划院,云南 昆明 650216
- 折叠
摘要
为解决G214隔界河(滇藏界)-德钦县城段公路隧道工程在石膏质岩段的设计难题,文章开展了石膏质岩段的地质调查及土工试验,确定了石膏质岩具有易溶蚀、弱腐蚀、膨胀性的特性.根据石膏质岩的特性采取近圆形内轮廓、U型钢与H型钢组成的双层初期支护的设计方案,配合周边位移、拱顶下沉、围岩体内位移(洞内设点)、两层支护间压力、支护和衬砌内应力的监控量测,能很好地辅助双层初支的第二层初支施作.
Abstract
In order to solve the design problem of highway tunnel engineering from G214 Gejiehe(Yunnan-Tibet boundary)to Deqin County in gypsum rock section,the geological survey and geotechnical test of gypsum rock section are carried out.It is determined that gypsum rock has the characteristics of easy dissolution,weak corrosion and expansibility.According to the characteristics of gyp-sum rock,the design scheme of double-layer initial sup-port composed of nearly circular inner contour,U-shaped steel and H-shaped steel is adopted.With the monitoring and measurement of surrounding displacement,vault sub-sidence,internal displacement of surrounding rock(setting points in the tunnel),pressure between two layers of sup-port,support and lining internal stress,it can well assist the construction of the second layer initial support of dou-ble-layer initial support.
关键词
隧道支护设计/隧道工程/地质勘察/石膏质岩隧道/大变形/软岩隧道Key words
tunnel support design/tunnel engineering/geological survey/gypsum rock tunnel/large deformation/soft rock tunnel引用本文复制引用
出版年
2024
NETL
NSTL
万方数据