2014年5月上 施工技术 第43卷第9期 CONSTRUCTION TECHNOLOGY 123 D0I:10.7672/5j52014090123 卵石层大跨小间距渡线隧道暗挖施工技术* 李润军1 2，廖秋林2，李源潮3，田亮，赵丁鸿1 (1.中国矿业大学（北京），北京100083；2.北京城建设计发展集团股份有限公司，北京100088： 3.中铁第五勘察设计院集团有限公司，北京102600) [摘要]在卵石地层中施工跨度大、间距小、断面多的渡线段隧道，难度很大.通过数值模拟和工程类比，确定了从 大洞向小洞（纵向）、先小洞后大洞（横向）的施工顺序，解决了不同断面、工法的合理过渡及小间距隧道群洞效应； 采用径向注浆方案解决了小间距隧道间土体加固的难题；采取构造梁柱体系、错开破洞及分段拆除临时支撑的方 法，实现了受力合理转换.采取潜孔锤跟管钻进工艺，解决了砂卵石地层打设管棚的难度. [关键词]隧道工程：渡线隧道；卵石地层；暗挖：施工技术 [中图分类号]U231.3 [文献标识码]A [文章编号]1002-8498(2014)09-0123-04 Shallow Mining Method of Large-span Small Spacing Connecting Tunnel in Cobble Layer Li Runjun.2 Liao Qiulin2 Li Yuanchao Tian Liang' Zhao Dinghong (1.China University of Mining and Technology Beijing) Beijing 100083 China; 2.Beijing Urban Construction Design Development Group Co.Lsd.Beijing 100088 China: 3.China Railway Fifth Survey and Design Institute Group Co. Lid.Beijing 102600 China) Abstract:Connecting tunnel construction is quite difficult in cobble layer because it's large-span small spacing and fickle cross section.The construction sequence was finalized by numerical simulation and engineering analogy.It is from large section tunnel to small one longitudinally and from small section tunnel to large one transversally.In this way transitional construction with different sections and technology is suecessfully pleted and multi-cavity effect of small spacing construction is conquered. Radial grouting can solve the problem of soil reinforcement among small spacing tunnel.Reasonable force transforma...
卵石层大跨小间距渡线隧道暗挖施工技术.pdf
