大断面城市隧道衬砌支护参数研究  

Studies on Lining Parameters of a Large Cross Section Tunnel in the City

作　　者：楼晓明[1] 龚彦峰[2] 

机构地区：[1]福州大学紫金矿业学院,福州350108 [2]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《土工基础》2011年第6期23-25,30,共4页Soil Engineering and Foundation

基　　金：福建教育厅资助项目(JA09029);2008年度福州大学科技发展基金(自然科学类)资助项目(2008-XQ-20)

摘　　要：武广高铁金沙洲隧道位于广州市西北侧。为了保证金沙洲隧道在施工和运营期间安全、可靠及经济合理,对其进行了初期支护和二次衬砌支护参数分析研究。首先,根据地质条件及相关设计规范,应用类比法对Ⅳ级围岩的初期和二次衬砌支护参数进行了设计。然后,根据实际情况,考虑地下水作用,采用有限元法计算分析了部分Ⅳ级围岩隧道初期支护和二次衬砌结构受力变化。最后进行了强度验算,为金沙洲隧道的设计和施工提供了参考依据。The Jinshazhou Tunnel of Wuhan-Guangzhou High-speed Rail Project is northwest of Guangzhou City. In order toassure the safety and the cost effectiveness of this tunnel during construction and operation, the lining parameters for the pri- mary and quadric lining supports are studied. Based on the design codes and the site geotechnical conditions, the primary and quadric lining support parameters are obtained for the Class IV surrounding rock masses by using the Analogy Method. Then,the finite element analyses are performed on the same Class IV surrounding rock masses by considering the effect of groundwa- ter. Therefore, the stress changes on the primary and quadric supporting structures can be predicted. These approaches providea viable solution for the design and construction of this large cross-section tunnel in an urban area.

关 键 词：隧道 初期支护 二次衬砌 安全系数 

分 类 号：U452[建筑科学—桥梁与隧道工程]