盾构地铁管片设计的修正模型及其应用

管片和围岩变形一直是地铁设计和施工中待解决的难点之一,通常所采用的惯用法模型中,管片的计算主要考虑土层抗力和接头对结构的主要影响.在对现有模型中管片接头计算方法的研究基础上,本文得到了改进后的惯用法模型,推导了修正惯用法模型的位移求解公式,用地层结构法建立了围岩和衬砌的有限元模型.并结合哈尔滨地铁一号线工程实例资料,用修正惯用法模型求解衬砌的位移解析解,又用地层结构法中现用的惯用模型公式分别对围岩变形和衬砌进行了数值解计算,并进行比较.经研究表明,修正后的模型和推导的公式是可靠的,该项研究成果对管片设计具有一定的理论意义.

Application of an Improved Model of Metro Shield Segment

Segment lining and surrounding rock deformation to be solved in the design and construction of the subway is one of the difficulties of generally adopted by the usage model .The segment was considered in the calculation of soil resistance and joint influence on the structure of the main .In the existing model research based on the calculation methods of segment joint , this paper improved the usage model and deduced the solution for-mulas of the displacement of the fixed usage model with stratigraphic structure method to establish the finite ele -ment model of surrounding rock and lining .And examples of Harbin metro engineering data , the model of the modified conventional method to solve the displacement of the lining of the analytical solutions , and the strati-graphic structure method now respectively with conventional model formula in the numerical solution for the de -formation of surrounding rock and lining were calculated and compared .Studies show that the revised model and the deduced formula are reliable .The study results of segment design are of certain theoretical significance .