CAJ | 학술논문

通过三维弹塑性有限元模型的建立,探讨软土地区盾构隧道开挖对地表沉降及上部桩基工作性状的影响规律.结果表明:地表沉降随盾构隧道开挖深度的增大而减小,而发生地表沉降范围增大;当桩体位于隧道拱顶正上方时,桩端与隧道拱顶问的最小安全距离为0.5d(d为隧道直径);盾构隧道开挖在其侧上方引起的影响区为距离隧道中心线1d的范围.
통과삼유탄소성유한원모형적건립,탐토연토지구순구수도개알대지표침강급상부장기공작성상적영향규률.결과표명:지표침강수순구수도개알심도적증대이감소,이발생지표침강범위증대;당장체위우수도공정정상방시,장단여수도공정문적최소안전거리위0.5d(d위수도직경);순구수도개알재기측상방인기적영향구위거리수도중심선1d적범위.
A 3D elasto plastic finite element model was established, and a detailed discussion was made on the influence caused by tunneling to ground settlement and super-pile. The results showed that the ground settlement which occurs in larger scope would reduce with the increasing of shield tunnel excavation depth. If the pile existed just at the upside of shield tunnel crown, the minimum safe distance between pile toe and shield tunnel crown would be half tunnel diameter. The lateral up influenced zone due to tunneling was one tunnel diameter from tunnel centerline.