摘要
以扬州瘦西湖超大直径盾构隧道为背景,采用有限元法建立能够考虑衬砌块与块、环与环、衬砌与周围土体相互作用的精细化“梁-弹簧”数值计算模型,结合隧道场地条件,计算得到作用于隧道衬砌上的力,采用荷载-结构法计算了错缝和通缝拼装方式下衬砌的内力和变形,分析了不同拼装方式对两者的影响。结果表明,错缝拼装方式下,衬砌水平位移、竖向位移和角变形均小于通缝拼装方式下的相应值,较通缝拼装分别减少约11.5%、27.7%和26.4%;错缝拼装方式下,衬砌轴力、剪力及弯矩均大于通缝拼装方式下的相应值,较通缝拼装分别增大约19.6%、54.0%和236%;错缝拼装与通缝拼装相比,错缝拼装具有较好的抗变形、防水性能,通缝拼装具有较好的受力、经济性能,考虑到瘦西湖隧道工程投入大、境内水量丰富且变形控制要求高,因此建议选择错缝拼装方式。
Taking Yangzhou Shouxihu shield tunnel with super-large diameter as the background,a refined "Beam-Spring" FEM model,which can consider the interaction between lining block and block,ring and ring,lining and surrounding soil,was established. According to the site conditions,the forces acting on the tunnel lining were calculated as well. The stress and deformation of the lining under staggered joint assembling and straight joint assembling were calculated through load-structure method,and the influences of assembling styles on stress and deformation of tunnel lining were analyzed. The results indicate that the horizontal displacement,vertical displacement and angular displacement of lining under staggered joint assembling are smaller than those under straight joint assembling,which are reduced by 11.5%,27.7% and 26.4%,respectively. Oppositely,the axial force,shear force and bending moment of lining under staggered joint assembling are bigger than those under straight joint assembling,which were increased by 19.6%,54.0% and 236%,respectively. The staggered joint assembing has better deformation resistance and waterproof performance,and the straight joint assembling has better mechanical and economic performance. Considering the large investment,abundant water content in the region and high deformation control requirements of Shouxihu tunnel project,it is recommended to choose the staggered joint assembling method to build the tunnel.
作者
范一鸣
李博
刘波
FAN Yiming;LI Bo;LIU Bo(Bozhou Vocational and Technical College,Bozhou 236800,China;Bozhou Key Project Management Bureau,Bozhou 236800,China;School of Civil Engineering,Southeast University,Nanjing 210098,China)
出处
《安徽建筑大学学报》
2021年第1期12-20,共9页
Journal of Anhui Jianzhu University
基金
亳州职业技术学院院级自然科学重点项目(BYK1709)
安徽省高等学校省级质量工程项目(2018MOOC106)
亳州职业技术学院教学研究重点课题(2018bzjyxm33)。
关键词
盾构隧道
错缝拼装
通缝拼装
数值模拟
shield tunnel
staggered joint assembling
straight joint assembling
numerical modelling
