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    Volume 49, Issue 6 (February 2021)

    Experimental Study on Embankment Failure Law and Reinforcement Technology for Highway Widening Project over Silt Soils

    (Received 8 July 2020; accepted 20 October 2020)

    Published Online: 02 February 2021

    CODEN: JTEVAB

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    Abstract

    In the highway widening project, it is of great importance to take measures to control the differential settlement between the new and old embankment, therefore improving the stability of the new embankment. This article presents a series of model tests to analyze the failure law of the new embankment and compare the reinforcement effects of different reinforcement technologies. The test results show that the new embankment is unstable because of the slope slippage under ultimate load. In the reinforcement test of gravel pile, reaming phenomenon occurred at the top of the pile, and both of the values in pavement settlement and embankment lateral deformation are similar to those of the unreinforced embankment. In the geogrid reinforcement test, the embankment settlement can be reduced by restricting the lateral deformation of the new embankment with geogrid, where the settlement is 41 % less than that of the unreinforced scenario. In the cement fly ash gravel (CFG) reinforcement test, the pavement load is transferred to a deeper layer of the embankment by CFG piles, a soil arch effect with the surrounding soil is formed to restrict the lateral deformation and slippage, and the pavement settlement is 46 % less than that of the unreinforced scenario. According to the test results, the order of effectiveness for the reinforcement methods is CFG piles > geogrid > gravel pile.

    Author Information:

    Lv, Gao-hang
    School of Civil Engineering, Shandong University, Jinan,

    Cui, Wei
    School of Qilu Transportation, Shandong University, Jinan,

    Zhang, Qian-qing
    Geotechnical and Structural Engineering Research Center, Shandong University, Jinan,

    Wu, Shi-qian
    Shandong Luqiao Group Co., Ltd., Jinan, Shandong

    Wang, Shu-jian
    Shandong Luqiao Group Co., Ltd., Jinan, Shandong


    Stock #: JTE20200429

    ISSN:0090-3973

    DOI: 10.1520/JTE20200429

    Author
    Title Experimental Study on Embankment Failure Law and Reinforcement Technology for Highway Widening Project over Silt Soils
    Symposium ,
    Committee E17