Preventing concrete spalling is very important in tunnel maintenance because it can be a direct hazard to the operational safety of trains. This paper deals with the applicability of sprayed polyurea as a method to prevent spalling of tunnel linings. Model tests and trials using the method were carried out. According to the model tests, when the arch crown displacement reached 30mm, bending compressive fractures appeared around the shoulder of the lining, no spalling occurred in the lining because the polyurea covered the exfoliated concrete. The model tests therefore confirmed the effectiveness of polyuria application against spalling. For the trials in an actual tunnel, 3 kinds of surface were prepared before application of the polyurea spray, which enabled evaluation of bonding strengths and execution time.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Spalling Prevention Method for Tunnel Lining Using Polyurea Resin



    Published in:

    Publication date :

    2017




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    Local classification TIB:    355/7030
    BKL:    55.85 Schienenverkehr



    Spalling Prevention Method for Tunnel Lining Using Polyurea Resin

    Shimamoto, K. / Yashiro, K. / Ito, N. | British Library Online Contents | 2017


    Mechanism and countermeasures of coarse aggregate spalling in aged concrete lining

    Nishio, Sohei / Sasaki, Takahiko / Kojima, Yoshiyuki | IuD Bahn | 2006


    Tunnel lining tests

    Matsuda, Y. | British Library Online Contents | 2001


    ARTICLES - Tunnel lining tests

    Matsuda, Y. | Online Contents | 2001


    Lining the Connaught tunnel

    Ry, C.P. | Engineering Index Backfile | 1925