隧道超挖超耗管控措施研究  

Research on control measures for over-excavation and over-consumption in tunnels

作　　者：欧小强 夏金选 肖清华[3] 海维深 陈静 Ou Xiaoqiang;Xia Jinxuan;Xiao Qinghua;Hai Weishen;Chen Jing(China Railway Southwest Research Institute Co.,Ltd.,Chengdu Sichuan 611731,China;China Railway Development Investment Group Co.,Ltd.,Kunming Yunnan 650500,China;Southwest Jiaotong University,Chengdu Sichuan 610031,China;Yunnan Science&Technology Research Institute of Highway,Kunming Yunnan 650000,China;China Railway No.8 Engineering Group Co.,Ltd.,Chengdu Sichuan 610000,China)

机构地区：[1]中铁西南科学研究院有限公司,四川成都611731 [2]中铁开发投资集团有限公司,云南昆明650500 [3]西南交通大学,四川成都610031 [4]云南省公路科学技术研究院,云南昆明650000 [5]中铁八局集团有限公司,四川成都610000

出　　处：《山西建筑》2025年第1期158-163,共6页Shanxi Architecture

基　　金：中铁开发投资集团有限公司科技研究开发计划项目(编号:2022-B类-05);中国中铁股份有限公司科技研究开发计划(编号:实用技术2022-专项-01)。

摘　　要：隧道的超挖超耗管控是绿色低碳时代背景下工程界最关心的难题,对施工企业的成本控制和效益提升具有重要意义。以武两高速XFS隧道为背景,系统总结了隧道超挖超耗的10类影响因素和常见对策,包括围岩条件、施工参数、测量放样、爆破方案、钻孔质量、喷射混凝土回弹率、预留变形量、物资设备性能、作业人员水平和现场施工管控。分析了XFS隧道超挖超耗的原因,并制定了加强地质预报和超前支护施作,减小开挖进尺;动态调整爆破方案,严格炮孔质量检查;引入超细改性硅微粉优化配合比,提高喷射工艺水平;加强现场施工管控,制定超挖超耗管控办法,落实作业人员的激励奖惩等措施。措施执行后,XFS隧道平均超挖由30.1 cm降低至16.6 cm,综合超耗由173.7%降低至100.7%。The control of over-excavation and over-consumption in tunnels is the most concerned problem in the engineering field in the context of green and low-carbon,and it is of great significance for the cost control and benefit improvement of construction enterprises.Based on the XFS tunnel of Wulong-Liangjiang New Area Expressway,this paper systematically summarizes 10 types of influencing factors and common countermeasures for tunnel over-excavation and over-consumption,including surrounding rock conditions,construction parameters,measurement lofting,blasting plans,drilling quality,rebound rate of shotcrete,deformation allowance,material and equipment performance,operator level and on-site construction control.The reasons for over-excavation and over-consumption in XFS tunnel are analyzed,and the measures such as strengthening geological prediction and advance support,reducing excavation dimension,dynamically adjust blasting plans,strictly inspecting the quality of blast holes;introducing ultra-fine modified silica micro-powder to optimize the mix ratio,improving the level of spraying technology;strengthening on-site construction control,formulating measures of controlling over-excavation and over-consumption,and implementing measures of reward and punishment for operators are formulated.After implementing these measures,the average over-excavation decreased from 30.1 cm to 16.6 cm,and the comprehensive over-consumption decreased from 173.7%to 100.7%in XFS tunnel.

关 键 词：小净距-分离式双洞隧道 超挖 超耗 超细改性硅微粉 

分 类 号：TU997[建筑科学—市政工程] U455.1[建筑科学—桥梁与隧道工程]