文档介绍：西南交通大学硕士研究生学位论文第1页摘要掌握不同溶洞对隧道影响规律,开展岩溶区隧道衬砌形式研究,对提高岩溶区隧道安全性,加快岩溶区隧道的建设有着直接的推动作用。论文采用大型有限元计算软件ANSYS进行数值模拟计算。先对单线铁路隧道在不存在溶洞、存在溶洞以及溶洞尺寸和位置发生变化情况下,分别进行了建模计算。通过对计算结果汇总、对比分析,总结了不同溶洞对单线铁路隧道衬砌影响规律。再结合分析得出的规律,进而展开对隧道衬砌进行优化,并得出了一些针对岩溶区隧道设计和施工具指导意义的结论。论文主要研究内容包括: l、隐伏溶洞对单线铁路隧道衬砌影响规律的研究:分顶部隐伏溶洞、侧部隐伏溶洞和底部隐伏溶洞三种情况,在每神情况下对溶洞的尺寸进行四种变化,共12种工况下进行数值模拟分析了隐伏溶洞对单线铁路隧道衬砌的影响:2、提出了六种岩溶区单线铁路隧道衬砌优化方案:对侧部隐伏溶洞和底部隐伏溶洞各提出了三种优化方案; 3、对岩溶区单线铁路隧道衬砌优化方法的优化效果研究:对六种优化方案分别进行数值模拟计算,通过与优化前隧道衬砌的受力变形对比分析,对优化效果进行总结: 4、对岩溶区隧道衬砌的设计施工提出建议:根据理论分析的结果,结合隧道施工的实际情况,对岩溶区隧道衬砌的设计和施工提出了有益的建议。关键词:岩溶区隧道;溶洞;数值模拟;衬砌力学特性;优化 Ab stract Obtaining theinfluence rulesofthe carst tunnel by different cave style,and proceeding karst tunnel lining style research has directly push forward to improve the security ofkarst tunnel and accelerate the construction ofkarst tunnel. The thesisadopts thelarge-scale finiteelement analysis software ofANSYS numerical thesisbuilds different models tosimulate various conditions including not existing karstcave,existing karst cave,changing karst c,ave dimension and thesis generalizes theimpact law ofvaried karst cave tothesingle-line railway tunnel bysummary and contrast analysis to the calculated studies on karst tunnel liningoptimization have been got under condition ofobtained influence thethesis draw some significant conclusions tothe design andconstruction of carst tunnel. Main contents ofthepaper: 。The study ofinfluence law onconcealed carst cave tosingle—line railway tunnellining includes topconcealed carst cave,side concealed carstcave and bottom carst every case has four dimension study proceeds numerical simulation analysis under twelve work conditions. The paper present sixtunnel lining optimization programs including 3the concealed sideand 3bottom carst cave. After six optimization programs numerical putation, optimization effect study tothe carst tunnel by contrast theanalysis result of fore-and··aftopt