Formulae and methods for the analysis and design of joint packers between pipes in pipe-jacked tunnels are investigated. The aim is to determine their appropriate application in different situations which arise during tunnelling. Proposals of the preliminary European Standard give a formulation which confirms the work of Norris extended by Haslem. However, further analysis of pipeline behaviour is needed to apply it. Four such analyses are considered: the Australian Concrete Pipe Association method for cracked pipes explained by Ripley and a new proposal reducing its assumptions and approximations; and methods for both rigid and flexible pipes capable of sustaining tensile stress as Haslem reported. Reinforced concrete pipes typically used in Great Britain sustain tensile stress. Because all pipes in Norris's study were reinforced, allowing for flexure of the pipes is shown to be more appropriate than analysis for cracked pipes. The Australian method underestimates the maximum stress at the end of the pipe compared with the adjusted analysis suggested. Further practical investigation is necessary to determine when either method is suitable. In comparison with performance in real tunnelling works observed by Norris, calculated contact stress seems to discriminate conditions predicting pipe damage more finely than the preliminary European proposals.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Stress formulation for joints in pipe-jacked tunnels


    Contributors:

    Published in:

    Publication date :

    1998


    Size :

    10 Seiten, 10 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





    Culvert jacked under railroad

    Engineering Index Backfile | 1929


    European style crane capable of being jacked

    LIANG DAWEI | European Patent Office | 2021

    Free access

    Lifting operation platform jacked by hydraulic oil cylinder

    YANG GUANG / LIU WEIJUN / WANG ZONGJIN et al. | European Patent Office | 2024

    Free access

    Pipe tunnels under railroad tracks

    Lenhardt, L.G. | Engineering Index Backfile | 1930