Large-diameter buried steel pipes (BSPs) play critical roles in water transport for major water diversion and hydropower projects. Due to poor pipe-soil composite system properties and installation conditions, they are prone to excessive deformation, resulting in safety hazards. This paper takes a BSP project subjected to excessive deformation as an example. A simplified numerical model is first established to analyze the structural performance, including the stress and plasticity, and the relationship between the stress and deformation of the pipe. Furthermore, a jacking method to rehabilitate the pipe-soil composite system is conducted to explore its influences on pipe deformation, stress, and plasticity. The results show that considerable bending stresses occur in the pipe and that sections of the midspan and stiffening ring are in the pure bending state and eccentric bending state, respectively. Areas of high stress and plasticity center at the crown, springline, and invert of the pipe, and steel pipes with ring deformation of 8.9% can be continued to be used, as the full yielding of the pipe walls occurs at the ring deformation of 15.8%. The jacking method is an effective solution for the rehabilitation of BSPs subjected to large deformation and can reduce pipe deformation significantly while increasing the stress at the pipe crown and the pipe plasticity only slightly.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Numerical Investigation of the Method of Structural Performance and Rehabilitation of Large-Diameter Buried Steel Pipes Subjected to Excessive Deformation: A Case Study of China


    Additional title:

    KSCE J Civ Eng


    Contributors:
    Yu, Jin-Hong (author) / Shi, Chang-Zheng (author) / Wu, He-Gao (author) / Ma, Zhu (author)

    Published in:

    Publication date :

    2021-12-01


    Size :

    9 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Pipe-Soil Interaction and Sensitivity Study of Large-Diameter Buried Steel Pipes

    Wu, He-Gao / Yu, Jin-Hong / Shi, Chang-Zheng et al. | Springer Verlag | 2021



    Fracture of wrinkled pipes subjected to monotonic deformation: An experimental investigation

    Ahmed, Arman U. / Aydin, Mehmet / Cheng, J.J. Roger et al. | Tema Archive | 2011



    Deformation behavior and limit state of high-grade induction bend pipes subjected to large ground deformation

    Mitsuya, Masaki / Hashimoto, Yoshikazu / Sakanoue, Takashi et al. | Tema Archive | 2008