Journal of Jilin University(Earth Science Edition) ›› 2019, Vol. 49 ›› Issue (5): 1405-1414.doi: 10.13278/j.cnki.jjuese.20180318

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Feature Analysis and Control of Frost Heave to WaterfrontLight Platform Structure in Seasonal Frozen Soil Region

Sun Hongwei1, Fu Rujin2   

  1. 1. School of Civil Engineering, Changchun Institute of Technology, Changchun 130012, China;
    2. Changchun Xinlicheng Reservoir Authority, Changchun 130119, China
  • Received:2018-11-05 Published:2019-10-10
  • Supported by:
    Supported by Projects of Jilin Science and Technology Development Plan(20180201046SF)

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Abstract: In order to explore the damage mechanism of frost heave and freeze damage to waterfront light platform structure in seasonally frozen soil regions, and to test the effectiveness of the methods for controlling frost heave and freeze damage of the sleeve, a light platform group in Changchun was taken as the research object. Both vertical displacements of the natural frozen-swelling light platform structure and the light-platform structure equipped with anti-freeze and freeze-frozen sleeve device were observed in cold season by precise leveling instrument, and the foundations of the two were compared. It turned out that there was freeze damage to the foundation of the natural frost heave in the structure, and the frost heave curve demonstrated a "half hump shape" because of the temperature of the observation year. The displacement curve of frost heave showed the characteristics of decreasing-rising-decreasing-stable corresponding to continuous cooling, continuous low temperature, continuous heating in the positive temperature period of the observation year. The uplift of light platform pile was pulled by frost heave force, which caused damage. The vertical displacement of the structure with anti-freezing sleeve device was stable for a long time within a small displacement interval of±5mm, and the average displacement of the structure reduced by 98% compared with that of the natural frost heave in observation. The results showed that the device effectively isolated the effect of frost heave force on the structure; thus the displacement and damage were effectively controlled. During the inspection of the structure with anti-freezing-damage sleeve device, no typical freezing damage of frost heave displacement occurred, such as "misplacement" or "platen cracking", which confirms that the structure equipped with anti-freeze sleeve device is effective for controlling displacement freeze damage.

Key words: seasonal frozen soil regions, waterfront light platform structure, freeze damage of frost heave displacement, frost heave displacement curve, frost heave force, anti-freezing-damage sleeve device

CLC Number: 

  • P642.14
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