CAJ | 학술논문

传统的特征线法将初衬作为弹性构件，而实际隧道工程初衬变形远大于弹性变形，必然会进入塑性阶段。为此将初衬视作弹塑性材料对传统特征线法进行修正，并应用数值极限分析方法求解隧道围岩的安全系数，由此可获得严格力学计算下修正的围岩和初衬的特征曲线及其围岩压力。提出的基于强度折减数值极限分析的修正特征线法完全可以定量地解决隧道工程设计计算问题，为隧道设计提供理论基础和计算方法。
전통적특정선법장초츤작위탄성구건，이실제수도공정초츤변형원대우탄성변형，필연회진입소성계단。위차장초츤시작탄소성재료대전통특정선법진행수정，병응용수치겁한분석방법구해수도위암적안전계수，유차가획득엄격역학계산하수정적위암화초츤적특정곡선급기위암압력。제출적기우강도절감수치겁한분석적수정특정선법완전가이정량지해결수도공정설계계산문제，위수도설계제공이론기출화계산방법。
The traditional characteristic line method takes the preliminary lining as elastic component. But infact so the deformation of preliminary lining in practical tunnel engineering is much bigger than elastic deformation and the preliminary lining would be in the plastic state. Preliminary lining is considered as elastic-plastic materials to correct the traditional characteristic line method and numerical limit analysis is conducted to work out the safety factor of tunnel surrounding rock. Thus the corrected characteristic curve of surrounding rock and the pressure on the surrounding rock and preliminary lining can be obtained through strict mechanic calculation. The corrected characteristic line method through numerical limit analysis based on FEM strength reduction can solve the problem of design and calculation of tunnel engineering quantitatively,which provides theoretical basis and calculation method for the tunnel design.