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Volume 41 Issue 10
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JIN Xin, WANG Tie-hang, ZHAO Zai-kun, LUO Yang. Method for calculating coefficient of collapsibility of loess under unloading[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(10): 1959-1966. DOI: 10.11779/CJGE201910022
Citation: JIN Xin, WANG Tie-hang, ZHAO Zai-kun, LUO Yang. Method for calculating coefficient of collapsibility of loess under unloading[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(10): 1959-1966. DOI: 10.11779/CJGE201910022
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Method for calculating coefficient of collapsibility of loess under unloading

  • College of Civil Engineering, Xi’an University of Architecture and Technology, Xi'an 710055, China

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  • Received Date: October 11, 2018
  • Published Date: October 24, 2019
    Graphical Abstract
    • Abstract
  • The concomitant process of unloading and collapse exists in the loess between piles of self-weight collapse loess site subjected to inundation. It is difficult to calculate the collapse deformation of loess under unloading. The difference between unloading collapse and traditional collapse is discussed firstly, and the effects of collapse completion ratio and unloading ratio on unloading collapse deformation of loess are analyzed. Then, the unloading collapse tests are carried out considering the above-mentioned factors. The unloading collapse process is described by the collapse completion ratio, unloading collapse ratio and unloading ratio. Because they are more in accordance with the continuous unloading conditions in engineering practice, the multiple-unloading tests are mainly carried out. Based on the results of single- and multiple-unloading tests, the method for calculating the coefficient of collapsibility considering unloading effect is established. Further, the method for calculating the self-weight loess between piles is obtained by using the coefficient of collapsibility under unloading. The rationality of the proposed method for unloading collapse is demonstrated through laboratory verification tests and project cases.
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    • References (24)
  • [1]
    朱彦鹏, 杜晓启, 杨校辉, 等. 挤密桩处理大厚度自重湿陷性黄土地区综合管廊地基及其工后浸水试验研究[J]. 岩土力学, 2019, 40(8): 1-12.
    (ZHU Yan-peng, DU Xiao-qi, YANG Xiao-hui, et al.Research on utility tunnel foundation treated by compaction piles and post-work immersion test in the self-weight collapsible loess area with large thickness[J]. Rock and Soil Mechanics, 2019, 40(8): 1-12. (in Chinese))
    [2]
    朱彦鹏, 杨校辉, 马天忠, 等. 黄土塬地区大直径长桩承载性状与优化设计研究[J]. 岩石力学与工程学报, 2017, 36(4): 1012-1023.
    (ZHU Yan-peng, YANG Xiao-hui, MA Tian-zhong, et al.Study on bearing behaviors and optimization design of large-diameter long pile foundation in loess subsoil[J]. Chinese Journal of Rock Mechanics and Engineering, 2017, 36(4): 1012-1023. (in Chinese))
    [3]
    冯忠居, 王航, 魏进, 等. 黄土冲沟斜坡桥梁桩基竖向承载特性模型试验研究[J]. 岩土工程学报, 2015, 37(12): 2308-2314.
    (FENG Zhong-ju, WANG Hang, WEI Jin, et al.Model tests on vertical bearing performance of bridge pile foundation in loess gulch slope area[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(12): 2308-2314. (in Chinese))
    [4]
    赵明华, 胡倩, 杨超炜, 等. 考虑地基土非线性固结的桩侧负摩阻力计算方法研究[J]. 岩土工程学报, 2016, 38(8): 1417-1424.
    (ZHAO Ming-hua, HU Qian, YANG Chao-wei, et al.Negative skin friction of piles considering nonlinear consolidation of soil[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(8): 1417-1424. (in Chinese))
    [5]
    武崇福, 郭维超, 李雨农, 等. 考虑负摩阻力的刚性桩复合地基中性面深度及桩土应力比计算[J]. 岩土工程学报, 2016, 38(2): 278-287.
    (WU Chong-fu, GUO Wei-chao, LI Yu-nong, et al.Calculation of neutral surface depth and pile-soil stress ratio of rigid pile composite foundation considering influence of negative friction[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(2): 278-287. (in Chinese))
    [6]
    MASHHOUR I, HANNA A.Drag load on end-bearing piles in collapsible soil due to inundation[J]. Canadian Geotechnical Journal, 2016, 53(12): 2030-2038.
    [7]
    CAO W, CHEN Y, WOLFE W E.New load transfer hyperbolic model for pile-soil interface and negative skin friction on single piles embedded in soft soils[J]. International Journal of Geomechanics, 2014, 14(1): 92-100.
    [8]
    GB50025—2004 湿陷性黄土地区建筑规范[S]. 2004. (GB50025—2004 Code for building construction in collapsible loess regions[S]. 2004. (in Chinese))
    [9]
    黄雪峰, 陈正汉, 哈双, 等. 大厚度自重湿陷性黄土中灌注桩承载性状与负摩阻力的试验研究[J]. 岩土工程学报, 2007, 29(3): 338-346.
    (HUANG Xue-feng, CHEN Zheng-han, HA Shuang, et al.Research on bearing behaviors and negative friction force for filling piles in the site of collapsible loess with big thickness[J]. Chinese Journal of Geotechnical Engineering, 2007, 29(3): 338-346. (in Chinese))
    [10]
    黄雪峰, 杨校辉, 殷鹤, 等. 湿陷性黄土场地湿陷下限深度与桩基中性点位置关系研究[J]. 岩土力学, 2015, 36(增刊2): 296-302.
    (HUANG Xue-feng, YANG Xiao-hui, YIN He, et al.Study of relationship between maximum collapsing depth and neutral point position of pile foundation in collapsible loess ground[J]. Rock and Soil Mechanics, 2015, 36(S2): 296-302. (in Chinese))
    [11]
    杨校辉, 黄雪峰, 朱彦鹏, 等. 大厚度自重湿陷性黄土地基处理深度和湿陷性评价试验研究[J]. 岩石力学与工程学报, 2014, 33(5): 1063-1074.
    (YANG Xiao-hui, HUANG Xue-feng, ZHU Yan-peng, et al.Experimental study on collapsibility evaluation and treatment depths of collapsible loess upon self weight with thick depth[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(5): 1063-1074. (in Chinese))
    [12]
    姚志华, 黄雪峰, 陈正汉, 等. 关于黄土湿陷性评价和剩余湿陷量的新认识[J]. 岩土力学,2014, 35(4): 998-1006.
    (YAO Zhi-hua, HUANG Xue-feng, CHEN Zheng-han, et al.New recognition of collapsibility evaluation and remnant collapse of loess[J]. Rock and Soil Mechanics, 2014, 35(4): 998-1006. (in Chinese))
    [13]
    邵生俊, 李骏, 李国良, 等. 大厚度自重湿陷黄土湿陷变形评价方法的研究[J]. 岩土工程学报,2015, 37(6): 965-978.
    (SHAO Sheng-jun, LI Jun, LI Guo-liang, et al.Evaluation method for self-weight collapsible deformation of large thickness loess foundation[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(6): 965-978. (in Chinese))
    [14]
    郑建国, 邓国华, 刘争宏, 等. 黄土湿陷性分布不连续对湿陷变形的影响[J]. 岩土工程学报, 2015, 37(1): 165-170.
    (ZHENG Jian-guo, DENG Guo-hua, LIU Zheng-hong, et al.Influence of discontinuous distribution of collapsible loess on its deformation[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(1): 165-170. (in Chinese))
    [15]
    《工程地质手册》编委会. 工程地质手册[M]. 5版. 北京:中国建筑工业出版社, 2017.
    (Editorial Board of 《Geological Engineering Handbook》. Geological engineering handbook[M]. 5th ed. Beijing: China Architecture and Building Press, 2017. (in Chinese))
    [16]
    LIU Z, LIU F, MA F, et al.Collapsibility, composition, and microstructure of loess in China[J]. Canadian Geotechnical Journal, 2015, 53(4): 673-686.
    [17]
    邢义川, 金松丽, 赵卫全, 等. 基于离心模型试验的黄土湿陷试验新方法研究[J]. 岩土工程学报, 2017, 39(3): 389-398.
    (XING Yi-chuan, JIN Song-li, ZHAO Wei-quan, et al.New experimental method for loess collapsibility using centrifugal model tests[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(3): 389-398. (in Chinese))
    [18]
    武小鹏, 王兰民, 房建宏, 等. 原状黄土地基渗水特性及其与自重湿陷的关系研究[J]. 岩土工程学报,2018, 40(6): 1002-1010.
    (WU Xiao-peng, WANG Lan-min, FANG Jian-hong, et al.Seepage characteristics and their relationship with self-weight collapse of intact loess ground[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(6): 1002-1010. (in Chinese))
    [19]
    马闫, 王家鼎, 彭淑君, 等. 大厚度黄土自重湿陷性场地浸水湿陷变形特征研究[J]. 岩土工程学报,2014, 36(3): 537-546.
    (MA Yan, WANG Jia-ding, PENG Shu-jun, et al.Immersion tests on characteristics of deformation of self-weight collapsible loess under overburden pressure[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(3): 537-546. (in Chinese))
    [20]
    邵生俊, 李骏, 李国良, 等. 大厚度湿陷性黄土隧道现场浸水试验研究[J]. 岩土工程学报, 2018, 40(8): 1395-1404.
    (SHAO Sheng-jun, LI Jun, LI Guo-liang, et al.Field immersion tests on tunnel in large-thickness collapsible loess[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(8): 1395-1404. (in Chinese))
    [21]
    王铁行, 金鑫, 罗扬, 等. 考虑卸荷作用的黄土湿陷性评价方法研究[J]. 岩土力学, 2019, 40(4): 1281-1290.
    (WANG Tie-hang, JIN Xin, LUO Yang, et al.Evaluation method for loess collapse potential of unloading[J]. Rock and Soil Mechanics, 2019, 40(4): 1281-1290. (in Chinese))
    [22]
    GB/T50123—1999 土工试验方法标准[S]. 1999.
    (GB/ T50123—1999 Standard for soil test method[S]. 1999. (in Chinese))
    [23]
    TANNY J, COHEN S, ASSOULINE S, et al.Evaporation from a small water reservoir: direct measurements and estimates[J]. Journal of Hydrology, 2008(351): 218-229.
    [24]
    FOX G, MUÑOZ-CARPENA R, PURVIS R A. Controlled laboratory experiments and modeling of vegetative filter strips with shallow water tables[J]. Journal of Hydrology, 2018(556): 1-9.
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