Journal of Jilin University(Earth Science Edition) ›› 2020, Vol. 50 ›› Issue (6): 1833-1843.doi: 10.13278/j.cnki.jjuese.20200097

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Frost Heaving Feature Analysis and Treatment of Inner and Outer Waterfront Arch Parapet Structures in Seasonal Frozen Soil Regions

Sun Hongwei1, Zhai Lijie1, Ren Wangzhong1, Fu Rujin2   

  1. 1. Shool of Civil Engineering, Changchun Institute of Technology, Changchun 130012, China;
    2. Changchun Xinlicheng Reservoir Authority, Changchun 130119, China
  • Received:2020-02-24 Published:2020-12-11
  • Supported by:
    Supported by Projects of Jilin Science and Technology Development Plan(20180201046SF)

Abstract: In order to clarify the frost damage mechanism of horizontal frost heaving displacement to the inner and outer waterfront arch parapet in the seasonal frozen soil regions, and test the effectiveness of the anti-freezing device with isolation layer, some inner and outer structures in Changchun were taken as the research objects. In comparison with the three arch parapet structures including inner, outer, and experimental inner with isolation layer anti-freezing devices, the horizontal displacement states were observed and measured by steel rule in the three observation years (20101110-20110531, 20131110-20140531, 20171110-20180531) in cold periods. It turned out that there were inward horizontal frost heaving displacement frost damages, such as, tilt and crack in the inner structure. All the inward horizontal displacement curves developed a "half hump" trend according to the temperature;Corresponding to the continuous cooling-continuous low temperature-continuous heating-positive temperature period in the observation year, the inward horizontal frost heaving deformation showed the residual displacement movement of decreasing-increasing-decreasing-stabilizing caused by generating-growing-weakening-disappearing of the horizontal frost heaving stress. There was minor outward displacement to the outer structure, and all the curves of such a displacement showed wavy without any occurrence of frost damages. The horizontal frost heaving stress of the ice convex arch pushed the outer arch structure to compress the frozen soil concave arch to form the outward horizontal frost heaving displacement, which restricted its development. There was no horizontal displacement frost damages in the experimental inner arch structure. The inner horizontal frost heaving displacement is 83.92% less than that of the natural inner structure and 51.74% less than that of the outer structure. This result demonstrates that the anti-freezing device with isolation layer can prevent the horizontal displacement frost damage effectively.

Key words: inner arch parapet structure, outer arch parapet structure, horizontal frost heaving stress, horizontal frost heaving displacement, anti-freezing device with isolation layer

CLC Number: 

  • P642.14
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