CAJ | 학술논문

针对盾构隧道横向刚度有效率取值及其影响因素,借助有限元软件建立三维壳弹簧模型,计算综合考虑错缝拼装与地层抗力作用下的横向刚度有效率,探讨不同错缝拼装角度和地层抗力系数对隧道横向刚度有效率的影响。结果表明：典型珠三角地区错缝拼装时的横向刚度有效率为0.75,较通缝拼装0.65增加了15%。横向刚度有效率随着错缝角度的增大而增大,当错缝角度超过45°时,刚度有效率的变化趋于稳定。横向刚度有效率随着地基反力系数的增大,呈现线性增长趋势。
침대순구수도횡향강도유효솔취치급기영향인소,차조유한원연건건립삼유각탄황모형,계산종합고필착봉병장여지층항력작용하적횡향강도유효솔,탐토불동착봉병장각도화지층항력계수대수도횡향강도유효솔적영향。결과표명：전형주삼각지구착봉병장시적횡향강도유효솔위0.75,교통봉병장0.65증가료15%。횡향강도유효솔수착착봉각도적증대이증대,당착봉각도초과45°시,강도유효솔적변화추우은정。횡향강도유효솔수착지기반력계수적증대,정현선성증장추세。
In view of shield tunnel transverse effective stiffness value and its influencing factors, the finite element software is employed to establish a three-dimensional shell-spring model to calculate and analyze the transverse effective rigidity ratio in comprehensive consideration of staggered joint angle and strata resistance and to address the impact of staggered joint and soil stiffness on transverse effective rigidity ratio of shield tunnel. The results show that the transverse effective stiffness value in the typical pearl river delta region is 0. 75, which is 15% increase compared with 0. 65 for through joint assembling. The Transverse effective stiffness increases with the increase of the angle of staggered joint. When the staggered joint angle exceeds 45°, the change of the effective rigidity tends to be stable. The transverse effective stiffness tends to show linear growth with the increase of the coefficient of subgrade reaction force.