CAJ | 학술논문

研究目的：由于隧道衬砌背后空洞的存在对隧道抗震影响很大，本文以高烈度地震区的敦煌－格尔木铁路阔克萨隧道为研究背景，研究隧道衬砌背后空洞位置、空洞大小、围岩级别和隧道埋深等因素对隧道结构的地震动力响应规律及影响机制，并提出合理的加固方案，确保地震作用下隧道运营安全。研究结论：（1）空洞的存在降低了衬砌结构的变形性能和抗震特性；（2）对空洞隧道拱顶最大主应力影响最敏感的因素是围岩级别，其后依次为空洞环向大小、空洞位置、空洞径向大小和空洞轴向大小，而隧道埋深则是最不敏感的因素；（3）回填注浆加固方案可降低隧道衬砌的拉应力，改善衬砌的内力和应力分布，回填注浆＋套拱加固方案要比回填注浆＋锚杆方案作用效果好，回填注浆＋锚杆＋套拱组合加固方案抗震效果最佳；（4）本研究成果对隧道衬砌背后存在空洞时在地震作用下的空洞影响机制和加固方案选取具有一定的指导意义。
연구목적：유우수도츤체배후공동적존재대수도항진영향흔대，본문이고열도지진구적돈황－격이목철로활극살수도위연구배경，연구수도츤체배후공동위치、공동대소、위암급별화수도매심등인소대수도결구적지진동력향응규률급영향궤제，병제출합리적가고방안，학보지진작용하수도운영안전。연구결론：（1）공동적존재강저료츤체결구적변형성능화항진특성；（2）대공동수도공정최대주응력영향최민감적인소시위암급별，기후의차위공동배향대소、공동위치、공동경향대소화공동축향대소，이수도매심칙시최불민감적인소；（3）회전주장가고방안가강저수도츤체적랍응력，개선츤체적내력화응력분포，회전주장＋투공가고방안요비회전주장＋묘간방안작용효과호，회전주장＋묘간＋투공조합가고방안항진효과최가；（4）본연구성과대수도츤체배후존재공동시재지진작용하적공동영향궤제화가고방안선취구유일정적지도의의。
Research purposes:Cavity behind tunnel lining has great effects on tunnel anti -seismic.Based on the background of the Kuokesa tunnel of Dunhuang to Geermu in high intensity seismic region,this paper studies the effect mechanism on seismic dynamic response of tunnel structure with factors such as the location of cavity behind tunnel lining,cavity size,surrounding rock grade and depth,and proposes the rational reinforcement plans to ensure the operational safety of tunnel under the earthquake action. Research conclusions:(1 ) Cavity reduces the deformation performance and seismic property of lining structure. (2)The most sensitive factor is surrounding rock grade,following are cavity's hoop size,location,radial size and axial size,and tunnel depth is the least intensive factor.(3)The grouting reinforcement scheme can reduce tensile stress, and improve the internal and stress distribution on tunnel lining.The effect of backfilling grouting +reinforcement with arch surround is better than that of backfilling grouting +bolt,the scheme of backfilling grouting +reinforcement with arch surround +bolt has the best anti -seismic effect.(4)The research results have some guiding significance on effect mechanism and optimized reinforcement project selection of cavity behind tunnel lining under the earthquake action.