小净距偏压平行公路软岩隧道大变形成因分析及处治措施研究  

Analysis on the Causes of Large Deformation in Soft Rock Tunnels of Parallel Highway with Small Clear Distance and Bias Pressure and Research on Treatment Measures

作　　者：赵勇 周洋 谌蛟 ZHAO Yong;ZHOU Yang;CHEN Jiao(Yunnan Binnan Expressway Co.,Ltd.,Dali 672100,China;YCIC Highway Construction First Engineering Co.,Ltd.,Kunming 650000,China;Yunnan Tongqu Engineering Testing Co.,Ltd.,Kunming 650000,China)

机构地区：[1]云南宾南高速公路有限公司,大理672100 [2]云南交投公路建设第一工程有限公司,昆明650000 [3]云南通衢工程检测有限公司,昆明650000

出　　处：《价值工程》2023年第33期112-114,共3页Value Engineering

摘　　要：本文结合某高速山岭公路隧道在小净距条件下,穿越偏压地形、断层破碎带影响区出现的大变形、衬砌与仰拱开裂、地表边坡滑动综合性问题,全面分析成因;结合项目特点,针对性制定地表裂缝封闭并监测,洞内临时支护,先行加固已施工段落,后续变形监测同步的处治措施。总结了:①重视地质;②平行双洞掌子面空间错开;③分步进洞;④改进工法;⑤科学组织;⑥注浆处治,六条规律。相关结论可供类似高速公路隧道、铁路双线隧道等参考。This article combines the comprehensive problems of large deformation,lining and inverted arch cracking,and surface slope sliding that occur in the affected area of a certain high-speed mountain highway tunnel under small clear distance conditions when passing through biased terrain and fault fracture zones.Based on the characteristics of the project,a comprehensive analysis of the causes will be carried out,and targeted measures will be developed to seal surface cracks and monitor temporary support within the tunnel,reinforce previously constructed sections,and synchronize subsequent deformation monitoring.Six laws was summarized:1Pay attention to geology.2Parallel double hole palm faces are spatially staggered.3Step by step into the hole.4Improve construction methods.⑤Scientific organization.⑥Grouting treatment.The relevant conclusions can be used as a reference for similar highway tunnels,railway double track tunnels,etc.

关 键 词：小净距 偏压 断层破碎带 软岩大变形 平行隧道 边坡滑动 处治 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]