You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.

    If you are an ASTM Compass Subscriber and this document is part of your subscription, you can access it for free at ASTM Compass
    Volume 49, Issue 6 (January 2021)

    Study of the Distribution and Change Law of Stress in Subgrade Immersed in Water in the Hetao Irrigation Area

    (Received 11 November 2019; accepted 13 October 2020)

    Published Online: 25 January 2021

    CODEN: JTEVAB

      Format Pages Price  
    PDF (1.04 MB) 10 $25   ADD TO CART

    Cite this document

    X Add email address send
    X
      .RIS For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others.   .DOCX For Microsoft Word



    Abstract

    The Bayan Nur Section of the Jing-Xin Expressway is located in the Hetao irrigation area. In this area, open river flooding is employed to irrigate the farmland, which causes seasonal subgrade immersion. With the fluctuation in the water levels, the water content of the subgrade soil increases, and the soil strength decreases due to water infiltration and capillary action. Thus, a field test section is built for long-term monitoring of the earth pressure, pore pressure, and settlement, and gravel cushion and reinforcement materials are utilized to reinforce the foundation in the test section. The test results show that the tidal variation in the groundwater level is obvious during the irrigation season, with the maximum increase in the pore pressure being 147.7 %, and the highest water level being 0.9 m above the ground. The change of subgrade soil moisture content and subgrade buoyancy results in the change of subgrade base pressure direction. The pressure distribution of the subgrade base after the reinforcement of the sand-gravel cushion and geotechnical materials presents an inverted bell type, which is similar to the pressure distribution of the rigid foundation base. The restraint and tension film effect of the cushion and reinforcement materials helps in improving the rigidity of the subgrade base.

    Author Information:

    Shen, Zuo
    Department of Civil Engineering, Shandong Jiaotong University, University Science Park, Jinan City, Shandong Province

    Jin, Li
    Department of Civil Engineering, Shandong Jiaotong University, Jinan City, Shandong Province

    Xin-zhang, Cui
    Department of Civil Engineering, Shandong University, Jinan City, Shandong Province

    Miao-zhang, Yu
    Department of Civil Engineering, Shandong Jiaotong University, Jinan City, Shandong Province


    Stock #: JTE20190845

    ISSN:0090-3973

    DOI: 10.1520/JTE20190845

    Author
    Title Study of the Distribution and Change Law of Stress in Subgrade Immersed in Water in the Hetao Irrigation Area
    Symposium ,
    Committee D04