黄土隧道加宽段初期支护的安全性分析  

The safety analysis of primary support in widened section of loess tunnel

作　　者：霍润科[1,2,3] 黄沛[1] 于振振[1] 李杰[1] 伦培元[1] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]结构工程与抗震教育部重点实验室,陕西西安710055 [3]西部建筑科技国家重点实验室(筹),陕西西安710055

出　　处：《西安建筑科技大学学报（自然科学版）》2010年第6期768-772,共5页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：陕西省自然科学基础研究计划资助项目(2009JM7005);陕西省重点学科建设专项资金资助项目(E01004);西安建筑科技大学人才科技项目基金(RC0708)

摘　　要：在黄土隧道工程施工中,支护的安全性是一个不容忽视的问题.针对隧道加宽段初期喷射混凝土支护结构表面突然出现裂缝的实际情况,考虑隧道开挖工况,通过数值分析验算初期支护参数选取的合理性,并结合监控量测得到的数据进行分析与评价.通过对裂缝出现的原因的综合分析,提出了相应的施工指导措施,研究成果对同类黄土隧道的设计和施工初期支护结构参数选取具有借鉴作用.During the construction period of a loess tunnel,safety is an important thing never to be ignored.In view of the situation where the shotcrete surface of primary support in the widened section of tunnel suddenly cracks,combined with the tunnel excavation steps,checking whether or not the parameter selection of the primary support meet the security requirements by using numerical analysis,and combining with the monitoring data to make a comprehensive analysis and evaluation therefore,become really an important matter.According to the results,the causes of cracks are analyzed and summarized,and the corresponding measures are taken to guide construction.These analysis plays an important role in guiding the design of similar loess tunnel and the parameter selection of the primary supporting structure.

关 键 词：黄土 隧道 初期支护 安全性 

分 类 号：U451[建筑科学—桥梁与隧道工程]