CAJ | 학술논문

基于Gibson土建立平行双孔隧道的三维实体结构计算模型，考虑衬砌与周围土体的共同作用，并在盾构开挖面处施加表面力以模拟切削刀盘的推进力效应，分析平行双孔隧道同步开挖及不同滞后距离异步开挖时隧道相互作用所引起的周边土体变形及收敛形式。研究表明，平行双孔隧道异步开挖时，滞后距离对超前开挖隧道周围的竖直沉降影响微小，而对后挖隧道断面竖直沉降以及左右隧道水平位移的影响较大；随两隧道间距的增加，开挖时相互的影响会随之减小。
기우Gibson토건립평행쌍공수도적삼유실체결구계산모형，고필츤체여주위토체적공동작용，병재순구개알면처시가표면력이모의절삭도반적추진력효응，분석평행쌍공수도동보개알급불동체후거리이보개알시수도상호작용소인기적주변토체변형급수렴형식。연구표명，평행쌍공수도이보개알시，체후거리대초전개알수도주위적수직침강영향미소，이대후알수도단면수직침강이급좌우수도수평위이적영향교대；수량수도간거적증가，개알시상호적영향회수지감소。
A 3 D entity structure calculation model of parallel twin tunnels was constructed based on Gibson Soil to investigate the effects of different excavation procedures on the soil movements around the twin tunnels.Numerical simulation analysis was performed by using three dimensional finite ele-ment analysis.Shield tunnel construction was simulated considering shield excavation face supported by uniform distributed load.The interaction between lining and surrounding soil layers was taken in-to account.The soil layer displacements around the the twin tunnels and contraction due to simulta-neous excavating and different construction procedures were investigated.It shows that the distance between the excavating sites of the twin tunnels with different-step construction procedure has a small effect on the vertical displacement of the formerly excavated tunnel,whereas it has a higher effect on the sectional vertical settlement of the latterly excavated tunnel and the horizontal displacements be-tween the twin tunnels.The interaction between the twin tunnels is lessened with the increase of their space.