论文部分内容阅读
考虑静动态上浮力、浆液时变性和上覆土体反向压缩性因素,基于弹性地基梁的弯曲微分方程、有限元理论和变形、转角、剪力以及弯矩协调方程和边界条件,获得了水下盾构隧道纵向上浮的理论解,并运用于“河北第一盾”曹妃甸工业区综合管廊工程。工程算例表明,理论解与数值解最大误差在2.5%以内,与正常掘进段监测值吻合度较高,可用于分析水下盾构隧道纵向上浮。另外,所得理论解摒弃了数值计算模型建立和细化单元的繁琐过程,易被设计、施工人员接受和应用,同时也为完善相关设计规范提供一定参考。
Considering the static and dynamic buoyancy, slurry degeneration and overburden reverse compressibility, based on the bending differential equation of beam, the finite element theory and the deformation, corner, shear and moment coordination equations and boundary conditions, the water Under the theory of longitudinal floating tunnel shield solution, and applied to “Hebei first shield ” Caofeidian integrated industrial corridor project. The engineering example shows that the maximum error of theoretical solution and numerical solution is within 2.5%, which is in good agreement with the monitoring value of normal tunneling section and can be used to analyze the longitudinal floating of underwater shield tunnel. In addition, the theoretical solution discarded the cumbersome process of establishing and refining the numerical calculation model, which is easy to be accepted and applied by the design and construction personnel. At the same time, it also provides a reference for improving the relevant design specifications.