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    Volume 48, Issue 5 (September 2020)

    Ground Response due to Construction of Shallow Pipe-Jacked Tunnels in Sandy Soil: Laboratory Investigation

    (Received 7 April 2017; accepted 17 July 2018)

    Published Online: 05 December 2018

    CODEN: JTEVAB

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    Abstract

    Pipe jacking is a microtunneling construction technique that is widely used as a trenchless technology in infrastructure and can be adopted in various geological conditions. Ground responses, such as displacements and soil fracturing, will occur during pipe jacking. In order to reduce disturbance to the surrounding soils, factors resulting in ground responses should be evaluated prior to construction. This article presents a series of laboratory tests to investigate the ground response that is due to shallow buried pipe jacking in sandy soil. Single and parallel pipe-jacked tunnel tests were conducted to simulate different construction conditions. Vertical soil displacements and corresponding jacking forces for various cases were observed and discussed. The results indicate that factors such as the existing pipes, the thickness of overburden soil, and the grouting slurry used have significant effects on the ground responses during pipe jacking. Slurry with a proper ratio is proposed for pipe jacking construction. Soil fracturing and grouting overflow can easily occur in the shallow buried tunnels when slurry injection points are opened at the upper side of the pipe. The jacking parameters should also be controlled within a range to reduce the risk of soil fracture and grouting overflow.

    Author Information:

    Yuan, Yao
    Department of Civil Engineering, State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean, and Civil Engineering, Shanghai Jiao Tong University, Minhang District, Shanghai

    Department of Civil Engineering, Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration (CISSE), Shanghai,

    Xu, Ye-Shuang
    Department of Civil Engineering, Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration (CISSE), Shanghai,

    Department of Civil Engineering, State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean, and Civil Engineering, Shanghai,

    Arulrajah, Arul
    Department of Civil and Construction Engineering, Swinburne University of Technology, Victoria,

    Yuan, Da-Jun
    Department of Civil Engineering, Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration (CISSE), Shanghai,


    Stock #: JTE20170217

    ISSN:0090-3973

    DOI: 10.1520/JTE20170217

    Author
    Title Ground Response due to Construction of Shallow Pipe-Jacked Tunnels in Sandy Soil: Laboratory Investigation
    Symposium ,
    Committee D18