兰新二线西宁隧道长距离浅埋下穿城区方案研究  

Scheme Research of Xining Tunnel on Lanzhou-Xinjiang Second Railway Under Passing Urban Area with Shallow Buried Overburden Along Long Distance

作　　者：靳宝成[1] 

机构地区：[1]中铁第一勘察设计院集团有限公司,陕西西安710043

出　　处：《铁道建筑》2018年第1期103-106,共4页Railway Engineering

摘　　要：本文分析了兰新二线西宁隧道DK192+120—DK193+528段浅埋下穿西宁城区的风险因素,并针对不同风险因素制订了相应的处理方案。兰西高速公路改移或断道困难,隧道浅埋下穿兰西高速公路段宜采用暗挖法施工,给出了设计施工参数。浅埋下穿民房、楼房、市政道路等既有建筑物段有明挖条件,从施工安全、征地拆迁范围、环境保护、工程投资等方面对比分析了暗挖、围护明挖和放坡明挖3种方案的优缺点,得出该段宜采用暗挖法施工。The risk factors of Xining tunnel on Lanzhou-Xinjiang second railway DK192+120—DK193+528 under passing Xining urban area with shallow buried overburden were analyzed,and the corresponding treatment schemes were formulated for different risk factors in this paper. It is difficult to change or break the Lanxi expressway. The mining method should be adopted in the section of tunnel under passing the Lanxi expressway with shallow buried overburden,t he parameters of design and construction were gave. Based on the cut-over conditions of tunnel under passing existing buildings,such as residences,buildings,municipal roads with shallow buried overburden,the advantages and disadvantages of mining method,enclosure cut-over method and slope cut-over method were analyzed in terms of construction safety,the scope of land expropriation and demolition,environmental protection and project investment. The results show that the mining method is more appropriate in urban area.

关 键 词：高铁隧道 施工方案 对比分析 下穿 城区 浅埋 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]