吉林大学学报(地球科学版) ›› 2019, Vol. 49 ›› Issue (5): 1405-1414.doi: 10.13278/j.cnki.jjuese.20180318

• 地质工程与环境工程 • 上一篇    下一篇

季冻土区临水轻台结构冻拔特征分析及防治

孙洪伟1, 傅汝进2   

  1. 1. 长春工程学院土木工程学院, 长春 130012;
    2. 长春市新立城水库管理局, 长春 130119
  • 收稿日期:2018-11-05 发布日期:2019-10-10
  • 作者简介:孙洪伟(1963-),男,副教授,主要从事工程冻害方面的研究,E-mail:1093663177@.com
  • 基金资助:
    吉林省科技发展计划资助项目(20180201046SF)

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)

摘要: 为探索季冻土区临水轻台结构冻拔冻害破坏机理,测试套筒防冻拔冻害技术的有效性,以长春某临水轻台群为研究对象,选择基土自然冻胀轻台结构与装有套筒防冻拔冻害装置的试验轻台结构相对比,用精密水准仪观测二者的寒期竖向位移动态。结果表明:基土自然冻胀轻台结构出现了冻拔位移冻害,各观测年冻拔位移曲线随气温均呈"半驼峰型"姿态发展,对应观测年的持续降温-持续低温-持续升温-正温时段,冻拔位移呈下降-上升-下降-稳定的变化特征;冻土的冻拔力推动轻台桩上拔引发冻拔位移冻害。观测装有套筒防冻拔冻害装置的试验轻台结构发现,其竖向位移长期在±5 mm的小位移区间平位波动,比自然冻拔轻台结构的平均冻拔位移减小了98%,表明套筒装置隔离了冻拔力对轻台结构的冻拔作用,冻拔位移冻害被有效遏制。勘验装有套筒防冻拔冻害装置的试验轻台结构,未发生"错动""台板拉裂"等典型冻拔位移冻害,印证了套筒防冻害装置对防治轻台结构冻拔位移冻害有实效。

关键词: 季冻土区, 临水轻台结构, 冻拔位移冻害, 冻拔位移曲线, 冻拔力, 套筒防冻拔冻害装置

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

中图分类号: 

  • P642.14
[1] 陈肖柏,刘建坤,刘鸿绪,等. 土的冻结作用与地基[M]. 北京:科学出版社,2006:4-496. Chen Xiaobai,Liu Jiankun, Liu Hongxu, et al. Frost Action Soil and Foundation Engineering[M]. Beijing:Science Press,2006:4-496.
[2] 冻土地区建筑地基基础设计规范:JGJ 118-2011[S]. 北京:中国建筑工业出版社,2011:26-38. Code for Design of Soil and Foundation of Building in Frozen Soil Region:JGJ 118-2011[S].Beijing:China Architecture & Building Press,2011:26-38.
[3] 建筑地基基础设计规范:GB 50007-2016[S]. 北京:中国建筑工业出版社,2016:83-86. Code for Design of Building Foundation:GB 50007-2016[S].Beijing:China Architecture & Building Press, 2016:83-86.
[4] 顾孝烈,鲍峰,程效军. 测量学[M]. 第五版.上海:同济大学出版社,2016:26-36. Gu Xiaolie, Bao Feng, Cheng Xiaojun. Surveying[M].5th ed. Shanghai:Tongji University Press, 2016:26-36.
[5] 李长雨, 马桂霞, 郝光,等. 季节冻土地区路基冷阻层温度场效应[J]. 吉林大学学报(地球科学版), 2018, 48(4):1174-1181. Li Changyu, Ma Guixia, Hao Guang,et al. Effect on Temperature Field of Subgrade Cold Resistive Layer in Seasonal Frost Region[J]. Journal of Jilin University (Earth Science Edition), 2018, 48(4):1174-1181.
[6] 孙洪伟,王德君,曲祖光,等. 季节性冻土地区人工湖岸船台桩基础"冻拔"现象的观测[J]. 长春工程学院学报,2007(4):1-4. Sun Hongwei, Wang Dejun, Qu Zuguang,et al. Observation of Upward Freezing Pulling Phenomenon About Pile Foundation Applied to the Artificial Lakeshore Shipway of Garden Buildings in Seasonal Frozen Soil Zone[J]. Journal of Changchun Institute of Technology,2007(4):1-4.
[7] 朱自强. 论季节性冻土沿深度分布[M]. 北京:科学出版社,1989:135-138. Zhu Ziqiang. Discussion on the Distribution of Seasonal Frozen Soil Along Depth[M]. Beijing:Science Press,1989:135-138.
[8] 徐学祖,何平,张健明. 土体冻结和冻胀研究的新进展[J]. 冰川冻土,1997,19(3):280-283. Xu Xuezu, He Ping, Zhang Jianming. New Progress in Research on Soil Freezing and Frost Heave[J]. Journal of Glaciology and Geocryology, 1997,19(3):280-283.
[9] 孙洪伟. 关于冻土的不稳定性研究[J]. 长春工程学院学报,2014(1):9-12. Sun Hongwei. Research on the Instability to Permafrost[J]. Journal of Changchun Institute of Technology, 2014(1):9-12.
[10] Sun Hong wei. Analysis of the Lifting Law of the Lakeshore Deepwater Berth[C]//Civil Engineering and Urban Planning:IV. London:CRC Press, 2015:597-601.
[11] 孙洪伟. 对MiLLer和Beskow冻土理论的研究[J]. 长春工程学院学报,2014(2):16-19. Sun Hongwei. Research on the Miller and Beskow Freezing Soil Theories[J]. Journal of Changchun Institute of Technology,2014(2):16-19.
[12] 张世银,汪仁和. 土壤冻胀特性的试验研究[J]. 岩土工程界,2004,17(2):72-73. Zhang Shiyin, Wang Renhe. Experimental Study on the Frost Heaving Properties of Soil[J]. Geotechnical Engineering World, 2004,17(2):72-73.
[13] He Ping. Process of Frost Heave and Characteristics of Frozen Fringe[J]. Journal of Glaciology and Geocryology,2004,26(Sup. 1):21-25
[14] 龙广成,刘赫,马昆林,等.考虑冻融作用的混凝土单轴压缩损伤本构模型[J]. 中南大学学报(自然科学版),2018,49(8):1884-1892. Long Guangcheng, Liu He, Ma Kunlin, et al. Uniaxial Compression Damage Constitutive Model of Concrete Subjected to Freezing and Thawing[J]. Journal of Central South University (Science and Technology), 2018,49(8):1884-1892.
[1] 朱杰, 徐颖, 李栋伟, 陈军浩. 泊江海子矿白垩纪地层冻结软岩力学特性试验[J]. 吉林大学学报(地球科学版), 2016, 46(3): 798-804.
[2] 张泽,马巍,齐吉琳. 冻融循环作用下土体结构演化规律及其工程性质改变机理[J]. 吉林大学学报(地球科学版), 2013, 43(6): 1904-1914.
[3] 张中琼, 吴青柏. 青藏高原多年冻土热融灾害发展预测[J]. J4, 2012, 42(2): 454-461.
[4] 安玉科, 佴磊. 冻融循环作用下节理岩体锚固性能退化机理和模式[J]. J4, 2012, 42(2): 462-467.
[5] 李向群, 孙超. 吉林省公路102线路基冻胀规律及冻深计算方法[J]. J4, 2010, 40(5): 1128-1132.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!