CAJ | 학술논문

采用极限分析上限法，基于内外能耗守恒原理，通过构建考虑隧底隆起的斜坡地段浅埋隧道破坏模式，推导出围岩压力的计算式，并通过典型算例重点分析了典型因素对隧道围岩稳定性的影响。研究结果表明：基于泰沙基极限平衡法进行隧道围岩支护设计较为保守，不考虑隧底隆起的极限分析方法次之考虑隧底隆起极限分析方法的风险最大；斜坡地表倾角增大对浅埋隧道稳定性有着不可忽视的不利影响；围岩压力随岩土侧压力系数减小、埋深增大、断面尺寸加大而增大；岩土黏聚力增大、内摩擦角增大对提高浅埋隧道围岩稳定性有积极作用。
채용겁한분석상한법，기우내외능모수항원리，통과구건고필수저륭기적사파지단천매수도파배모식，추도출위암압력적계산식，병통과전형산례중점분석료전형인소대수도위암은정성적영향。연구결과표명：기우태사기겁한평형법진행수도위암지호설계교위보수，불고필수저륭기적겁한분석방법차지고필수저륭기겁한분석방법적풍험최대；사파지표경각증대대천매수도은정성유착불가홀시적불리영향；위암압력수암토측압력계수감소、매심증대、단면척촌가대이증대；암토점취력증대、내마찰각증대대제고천매수도위암은정성유적겁작용。
On the basis of the energy conservation principle between internal and external work ,failure mode of shallow tunnel under inclined ground was established and the expression of surrounding rock pressure was drawn using the limit analysis upper bound method .The correlation factors was analyzed by the computation examples . This results showed that due to the conservative design on Terzaghi limiting equilibrium method of rock support system in tunnelling ,the limit analysis method without considering floor lift is medium ,while considering floor lift had the greatest risk .The increase in inclination angle of slope surface had adverse effect on the shallow tunnel stability and the surrounding rock pressure increased with the reduce of geotechnical lateral pressure coefficient ,or the increase of the buried depth and tunnel diameterLarger geotechnical cohesion force and friction angle were beneficial to improve the tunnel stability .