浅埋卵石土隧道中隔壁法施工超前加固对比分析研究  

Comparative Analysis and Research on Advanced Reinforcement of Shallow Cobblestone Tunnel Constructed by Middle Partition Method

作　　者：刘伟 陈伟祥 刘瑞辉 LIU Wei;CHEN Wei-xiang;LIU Rui-hui(CCCC First Highway Consultants Co.Ltd.,Xi'an 710075,China;Gansu Changda Highway Co.Ltd.,Lanzhou 730000,China)

机构地区：[1]中交第一公路勘察设计研究院有限公司,西安市710075 [2]甘肃长达路业有限责任公司,兰州市730000

出　　处：《公路》2023年第7期30-38,共9页Highway

基　　金：国家重点研发计划项目,项目编号2022YFC3002600。

摘　　要：隧道施工中遇松散岩层,如卵石土的岩体松散且黏聚力小,轻微的扰动极有可能造成隧道掌子面或者洞顶塌陷。以在建石羊岭隧道浅埋卵石土段为工程依托,采用中隔壁法施工,通过对比不同工况下超前支护的加固效果,施工前拟定4种工况,结合超前加固理论及现场施工,确定超前大管棚及超前小导管数值计算支护参数。通过数值模拟,选择行之有效的支护措施,对类似岩层隧道提供技术借鉴。In the tunnel construction,it is easy to collapse when the loose rock is encountered.Cobblestone soil with loose rock mass and small cohesion is very likely to cause tunnel face or roof collapse under slight disturbance.Middle partition method is used and then the reinforcement effect of advanced support under different working conditions is compared.Taking a shallow buried pebble tunnel in Qinghai Province as the engineering background,four kinds of working conditions are drawn up before construction.Combined with advanced reinforcement theory and site construction,the numerical calculation of support parameters of advanced large pipe shed and advanced small pipe is determined.Through numerical simulation,effective support measures are selected,which can provide technical reference for similar rock tunnel.

关 键 词：浅埋隧道 中隔壁 超前支护 数值模拟 

分 类 号：U455.49[建筑科学—桥梁与隧道工程]