CAJ | 학술논문

东巨寺沟铁路隧道选取试验段中实施湿喷工艺喷射聚丙烯纤维混凝土，作为支护结构，并作永久性支护结构，免除二次衬砌；为研究该隧道在列车作用下的动力响应，从土一结构相互作用模型出发，采用粘一弹性人工边界条件，建立隧道支护结构一围岩相互作用的动力分析模型，采用时程积分法研究了列车荷载对铁路隧道围岩和支护结构的动力作用，分析了列车荷载作用下由于轨道不平顺引起的动力响应，并对该隧道围岩的稳定性进行了分析。分析结果表明：在列车动力作用下，隧道围岩和支护结构变形微小，处于稳定状态。
동거사구철로수도선취시험단중실시습분공예분사취병희섬유혼응토，작위지호결구，병작영구성지호결구，면제이차츤체；위연구해수도재열차작용하적동력향응，종토일결구상호작용모형출발，채용점일탄성인공변계조건，건립수도지호결구일위암상호작용적동력분석모형，채용시정적분법연구료열차하재대철로수도위암화지호결구적동력작용，분석료열차하재작용하유우궤도불평순인기적동력향응，병대해수도위암적은정성진행료분석。분석결과표명：재열차동력작용하，수도위암화지호결구변형미소，처우은정상태。
The test section of Dongjusigou Railway Tunnel is selected to carry out wet-spraying process, i. e. spraying polypropylene fiber reinforced concrete is applied for the permanent support, and the secondary lining is avoided. In order to study the dynamic response of the tunnel under train loading, with the soil-structure interaction model and viscous-elastic artificial boundary condition, the dynamic analytical model of interaction between support structure of tunnel and surrounding rock is established so that dynamic action of train load against surrounding rock of railway tunnel and its support structure could be studied by means of time-integration, as well as both the dynamic response of surrounding rock due to irregularity of track under train 1 tunnel oading and its stability are analyzed. The results show that under dynamic train loading, deformation of surrounding rock and the support structure is small and stays in a stable state.