Subgrade is a critical component of railway systems since it provides a stable platform for the track substructure. The implementation of quality assurance methods is very important during the construction of a new railway subgrade and in monitoring the working performance of operating railways. There are several indicators available to measure the compaction and mechanical performance of a completed subgrade system, including compaction degree (K), porosity (n), modulus of subgrade reaction (K30), basic bearing capacity ( σ 0 ), strain moduli (Ev), dynamic modulus of deformation (Evd), and light dynamic penetration (N10). The objective of this research was to compare and evaluate the frequently used engineering methods in order to select the important and reliable indicators of field parameters. Four soil models with different degree of compaction were considered in the common laboratory tests and detection methods in China to determine the construction quality. The implementation and test results of these methods were analyzed and compared. The study results indicate that K correlates with n linearly. There is also a good correlation among K30, Ev, and Evd. As a recommendation, K is considered as the controlling indicator for compaction performance, and Ev2 and Evd are considered as the controlling indicators for railway subgrade stiffness evaluation. The bearing capacity or strength indicators may be added to the quality detection work in heavy-haul railway construction.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Comparison and evaluation of railway subgrade quality detection methods


    Contributors:
    Nie, Ru-song (author) / Leng, Wu-ming (author) / Yang, Qi (author) / Chen, Yohchia F (author) / Xu, Fang (author)


    Publication date :

    2018-02-01


    Size :

    13 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    Evaluation of Railway Subgrade Problems

    Li, D. | Online Contents | 1995


    Lime Stabilization of Railway Track Subgrade

    Sussmann, T. R. / Selig, E. T. / International Heavy Haul Association | British Library Conference Proceedings | 1997


    Comparative analysis of calculation models of railway subgrade

    I.O. Sviatko / D.O. Yampolskiy / V.D. Petrenko | DOAJ | 2013

    Free access