连拱隧道设计计算荷载合理取值研究  

Research on Reasonable Design Load Values for a Multi-Arch Tunnel

作　　者：郑文博[1] 蔡永昌[1] 石湛[1,2] 聂建春[3] 

机构地区：[1]同济大学地下建筑与工程系岩土及地下工程教育部重点实验室,上海200092 [2]中铁第四勘察设计院集团有限公司,武汉430063 [3]江西昌泰高速公路有限责任公司,吉安343000

出　　处：《现代隧道技术》2012年第5期44-50,共7页Modern Tunnelling Technology

基　　金：长江学者和创新团队发展计划资助(IRT1029)

摘　　要：为了克服已有连拱隧道的荷载取值缺乏理论依据问题,文章基于公路隧道设计规范中普通分离式隧道松动荷载计算公式,选取恰当的计算参数,建立合理的连拱隧道计算模型,得到了双洞四车道连拱隧道的松动圈范围和松动荷载的合理取值,并给出了相应的连拱隧道荷载计算公式,将从分离式隧道松动荷载到连拱隧道松动荷载这一推广过程由纯经验的推导变为半经验半理论的推导,具有更明确的理论依据和更强的参考及使用价值。与现场的实际监测数据等的对比分析,验证了所提出的连拱隧道松动荷载模式的合理性。Considering the absence of a theoretical basis for design loads for multi-arch tunnels, appropriate parameters were selected and reasonable calculation models were built based on the load calculation formula for normally separated tunnels. The character of the ＂loose zone＂ and appropriate load values for a four-lane multi-arch tunnel were established, and the formula of load calculation was developed from pure empirical deduction to semi-empirical deduction with more definite theoretical basis. Results indicate that the design load basically agrees with the measured one.

关 键 词：连拱隧道 松动范围 设计荷载 计算模型 

分 类 号：U452.2[建筑科学—桥梁与隧道工程]