CAJ | 학술논문

由于我国复杂的地形地质条件许多山岭隧道修建在地下水丰富的地区，但是目前铁路、公路隧道设计规范并未对衬砌承受水荷载的计算方法予以明确规定，隧道结构设计常采用全水压力或经验方法，导致设计不合理或过于保守。针对这种情况，本文以渭河隧道为工程背景，利用有限差分法对下穿河道的隧道进行流固耦合数值模拟分析，得出考虑外水压力时衬砌设计应采用的折减系数；同时，将考虑与不考虑外水压力条件下结构受力进行对比分析，得出了外水压力对隧道衬砌结构受力的影响，可供类似工程设计及施工参考。
유우아국복잡적지형지질조건허다산령수도수건재지하수봉부적지구，단시목전철로、공로수도설계규범병미대츤체승수수하재적계산방법여이명학규정，수도결구설계상채용전수압력혹경험방법，도치설계불합리혹과우보수。침대저충정황，본문이위하수도위공정배경，이용유한차분법대하천하도적수도진행류고우합수치모의분석，득출고필외수압력시츤체설계응채용적절감계수；동시，장고필여불고필외수압력조건하결구수력진행대비분석，득출료외수압력대수도츤체결구수력적영향，가공유사공정설계급시공삼고。
Because of the complex geological conditions in China,many mountain tunnels have been built in rich underground water area. But the calculation method of water load that lining could bear is not clearly defined in current railway and highway tunnel design code. The full water pressure or empirical method is often adopted in the tunnel structure design,which makes the design unreasonable or conservative. According to this situation,this paper makes the fluid-solid coupling numerical simulation analysis of the tunnel under-crossing the river by using the finite difference method and taking Weihe tunnel as the engineering background and presents the appropriate discount coefficient in lining design when the external water pressure is considered. By comparing the structure presses in two situations which considers water pressure or doesn't,this paper concludes the effect of water pressure on tunnel lining structure,which could provide a reference for similar engineering design and construction.