CAJ | 학술논문

目前关于隧道震害问题的研究主要集中于隧道洞门和洞口段,实际上仍有不少洞身衬砌在地震中产生严重震害,其中一个重要原因便是衬砌背后存在空洞或者回填不密实。通过大型有限元软件 ABAQUS,采用无限元边界解决地震波的反射震荡问题,研究衬砌背后空洞对隧道的地震动力响应的影响。通过分析得到：密实状态下,即使在较大地震动力作用下,衬砌结构仍处于良好的受压状态；一旦衬砌背后存在空洞,地震作用下脱空区衬砌产生很大拉应力,可能导致衬砌开裂坍塌；同时,空洞处周边围岩产生塑性区,易引起岩体松弛掉落冲击衬砌。
목전관우수도진해문제적연구주요집중우수도동문화동구단,실제상잉유불소동신츤체재지진중산생엄중진해,기중일개중요원인편시츤체배후존재공동혹자회전불밀실。통과대형유한원연건 ABAQUS,채용무한원변계해결지진파적반사진탕문제,연구츤체배후공동대수도적지진동력향응적영향。통과분석득도：밀실상태하,즉사재교대지진동력작용하,츤체결구잉처우량호적수압상태；일단츤체배후존재공동,지진작용하탈공구츤체산생흔대랍응력,가능도치츤체개렬담탑；동시,공동처주변위암산생소성구,역인기암체송이도락충격츤체。
At present,analyses of seismic damage to tunnels have focused on the tunnel portal and portal section.However,there are still many deeply-buried tunnels that have been badly damaged by earthquakes;an important reason for this is the existence of voids behind the lining or because the lining backfill is not dense.However,studies on the relationship between voids behind the lin-ing and the dynamic characteristics of earthquakes are few.In this study,the seismic performance of a tunnel with voids behind the lining are studied using the finite element software ABAQUS. The analysis reveals the following:if the lining is tightly and firmly stuck to the surrounding rocks,even under larger seismic action,the lining remains in a good state of compression.Once voids are present behind the lining,the lining that does not have the support of the surrounding rock comes under great tensile stress,resulting in cracking of the lining,which causes tunnel col-lapse.In addition,during earthquakes,larger plastic deformation appears in the surrounding rock without lining support than in those with lining support,causing the rock to more easily relax and fall off.