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    Volume 49, Issue 4 (July 2021)

    Special Issue Paper

    Effects of Soil Conditioning on Tool Wear for Earth Pressure Balance Shield Tunneling in Sandy Gravel Based on Laboratory Test

    (Received 26 November 2018; accepted 19 July 2019)

    CODEN: JTEVAB

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    Abstract

    Soil conditioning plays an important role in reducing soil abrasivity and wear of cutting tools in earth pressure balance shield tunneling, leading to service life extension of cutting tools. In this article, an experimental study to assess the abrasivity of conditioned soil with different conditioners, namely foam and slurry, was carried out using a soil abrasion tester. The abrasive characteristics of the tested soil samples were quantitatively assessed through the measurement of weight loss of the steel cubes fixed on the propeller. Preliminary test results indicate that both foam and slurry can modify the sandy gravel to a suitable state according to slump test and decrease soil abrasivity significantly. The torque, which reflects the interaction between the propeller and tested materials, is used to provide insights into the soil-tool contact. Potential relationships between tool wear and tool position are also investigated.

    Author Information:

    Wei, Ying-Jie
    School of Engineering and Technology, China University of Geosciences (Beijing), Beijing,

    Yang, Yu-You
    School of Engineering and Technology, China University of Geosciences (Beijing), Beijing,

    Qiu, Tong
    Department of Civil and Environmental Engineering, Pennsylvania State University, University Park, PA


    Stock #: JTE20180851

    ISSN:0090-3973

    DOI: 10.1520/JTE20180851

    Author
    Title Effects of Soil Conditioning on Tool Wear for Earth Pressure Balance Shield Tunneling in Sandy Gravel Based on Laboratory Test
    Symposium ,
    Committee G02