Abstract
With the increasingly dense distribution of urban metro network, it will inevitably lead to the problem of intersection between metro line and existing Viaduct Pile foundation. In order to ensure the normal operation of viaduct and complete the construction task of Metro at the same time, pile underpinning technology has been successfully applied to such projects. On the basis of theoretical analysis and relying on the ramp of Jinan Metro Line R2 production station to Lihuang station, this paper carries out numerical simulation of underpinning construction and tunnel underpass through finite element software, studies the deformation law of underpinning structure, determines the engineering risk points, and verifies the underpinning scheme to be adopted. The results show that the overall settlement of underpinning structure and the horizontal deformation of pile body presents “bow” shape. The structural deformation is mainly affected by underpinning construction, and the deformation of underpinning beam and the top of pile is the largest. The influence area of the surface is 4 m outside the underpinning beam. The above deformations meet the requirements of the code, that is, the scheme of manual piling. And the process of pre jacking up→ chisel pile→construction of underpinning beam and pile cap→passage of shield machine are safe and feasible.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IOP Conference Series: Earth and Environmental Science
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
