唐家塬隧道穿越滑坡段的综合整治技术及评价  

Comprehensive Treatment Technology and Evaluation for Tangjiayuan Tunnel Through the Landslide Section

作　　者：谷拴成[1] 王兵强[1] 王剑 贺维庚 

机构地区：[1]西安科技大学,西安710054 [2]陕西省高速公路建设集团公司,西安710065

出　　处：《铁道工程学报》2015年第1期93-98,共6页Journal of Railway Engineering Society

基　　金：陕西省教育厅科学研究项目(2013JK0961)

摘　　要：研究目的:以西宝高速公路唐家塬隧道为工程背景,探讨隧道穿越滑坡段的变形与围岩压力分布情况。在滑坡稳定性分析的基础上,提出针对性滑坡体综合整治措施;采用多方位的监控量测措施全程监控隧道开挖施工扰动对滑坡体变形的影响,并对滑坡体和隧道的稳定性进行评价。研究结论:(1)唐家塬隧道开挖前期,滑坡基本稳定,掌子面推进到距离监测断面50 m处,滑坡体变形增大,且掌子面到达监测断面时,监测点位移变化速率最大,随着隧道支护和抗滑桩加固作用的发挥,在掌子面推进到距离监测断面30 m后,滑坡基本恢复稳定;(2)监测初期,由于滑坡和地形偏压的影响,围岩压力显著增大,随着隧道支护作用的加强,逐渐趋于稳定,且围岩压力和地表沉降出现明显不对称现象;(3)本文探讨穿越滑坡段隧道施工与其相互影响,提出综合整治方案,并开展隧道的变形与围岩压力监测,其对类似工程选线、整治具有一定借鉴作用。Research purposes： Based on the engineering background of Tangjiayuan tunnel of Xian - Baoji highway, segment the deformation of the tunnel through the landslide and stress distribution of surrounding rock are investigated. On the basis of the landslide stability analysis, the paper puts forward comprehensive countermeasures of landslide and takes all- round monitoring measures as excavation disturbance＇s influence on the landslide deformation monitoring of tunnel to evaluate the stability of the landslide and the tunnel. Research conclusions： （ 1 ） In the early stage of Tangjiayuan tunnel excavation, the landslide is basically stable ; When the tunnel face advances to 50m from the monitoring section, landslide deformation increases; When the tunnel face advances arrived at monitoring section, the changing rate of displacement of monitoring points is the largest; As the role of tunnel support and anti - slide pile reinforcement, the tunnel face advance to the monitoring cross section after 30 m, landslide basically returns stability. （2） In the early monitoring, because of the influence of the landslides and terrain bias, the surrounding rock pressure increases significantly, with the effect of strengthening tunnel supporting, the surrounding rock pressure gradually stabilize, and the surrounding rock pressure and surface settlement appear obvious asymmetry phenomenon. （3） This paper discusses the landslide section of tunnel construction and its influence, puts forward the comprehensive improvement scheme, and monitors the deformation of tunnel and surrounding rock pressure, which is useful for the line selection and prevention of the similar engineering.

关 键 词：隧道工程 滑坡体 坡体变形 围岩压力 综合整治 

分 类 号：U452[建筑科学—桥梁与隧道工程]