摘要
桃树坪隧道穿越富水粉细砂地层,施工难度很大,尤其是斜井进正洞的挑高段施工风险更高。通过对四种方案在施工工序、支护形式及体系转换等方面的比选,最后选择采用导洞爬高进入正洞双侧壁导洞高度进行导洞施工、后进行中间部分施工的设计方案,顺利完成了隧道施工。文章详细介绍了四种比选方案及方案实施效果。
The construction of the Taoshuping tunnel passing through water-rich fine sandstone stratum was dif-ficult, especially the upward transition section from the inclined shaft to the main tunnel. Based on a comparison of four schemes in regards to construction consequence, support pattern, and system changes, the selected final option was to excavate a pilot tunnel from the inclined shaft to the upper part of the main tunnel and then construct the headings and middle part. The four comparative schemes are introduced and their effects are presented.
出处
《现代隧道技术》
EI
北大核心
2012年第4期69-75,共7页
Modern Tunnelling Technology
关键词
隧道施工
富水粉细砂
挑高段
双侧壁导洞
方案比选
Tunnel construction
Water-rich fine sandstone
Upward transition section
Pilot in double sidewall
Scheme comparison
