隧道改扩建工程施工风险评估研究  

Study on Construction Risk Assessment of Tunnel Reconstruction and Expansion Works

作　　者：王春河 朱福强 罗兴 张传奎 田军令 李贺朋 郭翼飞 WANG Chunhe;ZHU Fuqiang;LUO Xing;ZHANG Chuankui;TIAN Junling;LI Hepeng;GUO Yifei(CSCEC Shandong Investment Co.,Ltd.,Shandong 250101;China State Construction Engineering Corporation,Beijing 100037;China State Construction Port Engineering Group Co.,Ltd.,Shandong 266000;School of Mechanics and Civil Engineering,China University of Mining and Technology Beijing,Beijing 100083)

机构地区：[1]中建山东投资有限公司,山东250101 [2]中国建筑股份有限公司,北京100037 [3]中建筑港集团有限公司,山东266000 [4]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《现代隧道技术》2021年第2期63-70,共8页Modern Tunnelling Technology

基　　金：中建股份科技研发计划资助(CSCEC-2017-Z-20).

摘　　要：为研究既有隧道原位改扩建工程施工过程中的风险,以山东淄博淄川区黑峪隧道改扩建工程为例,建立新的隧道改扩建工程施工安全总体风险评估表,评估该工程总体风险属于Ⅳ级极高风险。综合核对表法和专家调查法进行危险源普查,识别出六项重大危险源,并对重大风险进行专项评估。以塌方风险为例,结合隧道改扩建项目施工难度和支护方法,从超前管棚支护、既有隧道洞口加固、新旧隧道交叉处围岩级别、新旧隧道交叉处施工支护方法等多个因子考虑,对塌方风险源进行指标体系法评估。并从支护、爆破、加固、其它施工措施四个方面制定风险消减措施,预防隧道塌方事故。To study the construction risks in the in-situ reconstruction and expansion of existing tunnels,by taking the Heiyu tunnel reconstruction and expansion project in Zichuan District,Zibo,Shandong Province as an example,an overall construction safety risk assessment table for tunnel reconstruction and expansion is established,the over⁃all risk is evaluated as a very high risk withⅣlevel.By conducting a general survey of hazard sources using the combined checklist method and expert investigation method,six major hazard sources are identified,and a special assessment of major risks is conducted.Taking the risk of collapse as an example,and in combination with the con⁃struction difficulty and supporting method of the tunnel reconstruction and expansion works,the index system meth⁃od is used to assess the risk sources of the collapse,taking multiple factors into consideration such as advanced pipe-roof support,reinforcement of the existing tunnel portal,surrounding rock classification at the intersection of old and new tunnels,and support method at the intersection of old and new tunnels.Besides,risk mitigation mea⁃sures in relation to supporting,blasting,reinforcement and other construction measures are developed to prevent tun⁃nel collapse accidents.

关 键 词：公路隧道 改扩建施工 风险评估 指标体系法 塌方事故 

分 类 号：U457.6[建筑科学—桥梁与隧道工程]