2013年4月上 施工技术 第42卷第7期 CONSTRUCTION TECHNOLOGY 97 D0I:10.7672/sgjs2013070097 隰县黄土隧道施工监测与安全预警机制* 魏建军 (江苏省建筑安全与减灾工程技术研发中心,江苏徐州221116) [摘要]为了掌握黄土隧道围岩变形规律,以隰县隧道工程为背景,现场进行了大量的施工监控量测工作,在分析 围岩及初期支护位移的基础上,研究了变形时空曲线回归分析方法及曲线特征,并以此为依据设计了施工安全预 警机制,举例说明了预警的实施情况. [关键词]隧道工程;黄土隧道;围岩;稳定;监测;预警机制 [中图分类号]TU74;U459 [文献标识码]A [文章编号]1002-8498(2013)07-0097-05 Monitoring Measurement and Early Security Warning System for the Loess Tunnel in Xixian Wei Jianjun (Jiangsu Research Development Centre of Construction Safety and Disaster Mitigation Xuzhou Jiangsu 221116 China) Abstract:To study the stability of loess tunnels extensive in-situ measurements were taken on the surrounding rock of Xixian Tunnel.Through the in-situ measurement the distribution characteristics of the surrounding rock displacements and the axial forces of the bolt supports were studied.Based on the analyses results an early safety warning system was designed.These conclusions and suggestions will offer useful references for construction of tunnels in similar geological conditions. Key words:tunnels;loess tunnel;surrounding rock;stability;monitoring;early warning mechanisms 1工程概况 业.根据围岩实际情况,隰县隧道斜井工区V级围 晋中南铁路通道是我国连接东西部的重要煤 岩段采取了三台阶分步开挖法,三台阶分步开挖整 炭资源运输通道,西起山西省吕梁市瓦塘镇,东至 个施工工序分为3个主要步骤(见图1):①第1步 山东省日照港,全长1260km 是我国也是世界上第 进行上弧形导坑环向开挖,施作拱部初期支护;② 1条按万吨重载铁路标准建设的铁路.隰县隧道位 第2步进行中下台阶左右错开开挖,施作边墙部初 于山西省临汾市隰县境内,隧道进口里程DK266 期支护;③第3步进行中心预留核心土开挖及隧底 812 出口里程DK277306 全长10494m 是晋中 开挖,施作隧道初期支护.每步开挖后均及时支 南通道的控制性工程.隧道穿越区为黄土高原梁 护,隧底初期支护后及时施作仰拱,尽早封闭成环. 茆区,沟壑纵...
隰县黄土隧道施工监测与安全预警机制.pdf
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