臺灣都會區大眾運輸地下網路發展迅速，隧道的密度逐年增加，臺灣位於環太平洋地震帶，活動斷層多且地震頻繁，當強震發生時，會使隧道產生變形及損壞。若隧道位於活動斷層附近，近斷層效應以及地中剪裂帶發展亦會對隧道產生影響。此外，若都市進行更新計畫並進行新結構物的深開挖工程時，基地鄰近如有既存隧道，地震或隧道附近的剪裂帶都會影響隧道與深開挖間的互制行為。有鑑於此，本計畫以離心模型試驗進行三年研究計畫，第一年探討淺層明挖覆蓋矩形隧道於不同地盤中受震時，對隧道受震行為的影響；第二年探討淺層明挖覆蓋矩形隧道置於斷層附近時，隧道與地中剪裂帶之互制行為；第三年探討開挖工程與淺層明挖覆蓋矩形隧道在地震作用或剪裂帶發展下的互制行為，以期研究成果能為未來淺層明挖覆蓋矩形隧道提供設計相關建議。 ;The underground mass transit system network is developed rapidly in urban area. The density of underground tunnel for subway or mass rapid transit increases as time goes on. Taiwan locates at the circum-Pacific earthquake zone, there are many active faults around this island and earthquakes occur frequently. The tunnel would damage and deform induced by the strong ground motion. In additionally, if the tunnel is nearby the active fault, the shear zone also affect the tunnel while the fault slips. On the other hand, if the urban renewal plan is carried out in the future, the the deep excavation would affect the existed tunnel nearby the site during earthquake or nearby the shear zone of fault. Therefore, this three years' project would conduct a series of centrifuge modeling tests to investigate (1) the seismic response of the shallow cut-and-cover rectangular tunnel in different ground deposit conditions; (2) the interaction between the shallow cut-and-cover rectangular tunnel and the shear zone of fault; (3) the interaction between the excavation and the shallow cut-and-cover rectangular tunnel during earthquake or nearby the shear zone of fault. The results can be used to improve the design and provide suggestions for the shallow cut-and-cover rectangular tunnel.
