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粗颗粒盐渍土地基掏挖基础抗拔承载模型试验研究

许健, 高靖寓, 李彦锋, 袁俊, 程东幸, 谭青海

许健, 高靖寓, 李彦锋, 袁俊, 程东幸, 谭青海. 粗颗粒盐渍土地基掏挖基础抗拔承载模型试验研究[J]. 岩土工程学报, 2019, 41(11): 2079-2085. DOI: 10.11779/CJGE201911013
引用本文: 许健, 高靖寓, 李彦锋, 袁俊, 程东幸, 谭青海. 粗颗粒盐渍土地基掏挖基础抗拔承载模型试验研究[J]. 岩土工程学报, 2019, 41(11): 2079-2085. DOI: 10.11779/CJGE201911013
XU Jian, GAO Jing-yu, LI Yan-feng, YUAN Jun, CHENG Dong-xing, TAN Qing-hai. Model tests on uplift behaviors of belled pier foundation in coarse-grained salty soils[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(11): 2079-2085. DOI: 10.11779/CJGE201911013
Citation: XU Jian, GAO Jing-yu, LI Yan-feng, YUAN Jun, CHENG Dong-xing, TAN Qing-hai. Model tests on uplift behaviors of belled pier foundation in coarse-grained salty soils[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(11): 2079-2085. DOI: 10.11779/CJGE201911013

粗颗粒盐渍土地基掏挖基础抗拔承载模型试验研究  English Version

基金项目: 中国电力工程顾问集团西北电力设计院有限公司科技项目(HQ-2015-P-PN-026)
详细信息
    作者简介:

    许 健(1980— ),男,博士,教授,博士生导师,主要从事特殊土与环境岩土工程研究。E-mail: xujian@xauat.edu.cn。

  • 中图分类号: TU448;TU475

Model tests on uplift behaviors of belled pier foundation in coarse-grained salty soils

  • 摘要: 考虑不同粗颗粒盐渍土层状态(结晶、溶蚀)和厚度,通过对粗颗粒盐渍土地基掏挖基础进行抗拔承载模型试验,分析了掏挖基础的抗拔承载特征。研究结果表明,上拔加载过程中地面以基础为中心产生明显隆起现象,逐渐形成以基础为中心的环状和放射状裂缝。地面隆起范围近似呈圆形扩大趋势;上拔位移随距基础中心距离增大而不断减小,上拔位移梯度随荷载增加逐渐增大。荷载-位移曲线呈现出典型的“软化型”特征;结晶状态下基础抗拔承载力随着盐渍土层厚度增加显著增加;结晶状态下基础抗拔承载力显著高于溶蚀状态。粗颗粒盐渍土地基破裂面形态表现为分段直线方程形式;普通粗颗粒土层、结晶状态粗颗粒盐渍土层及溶蚀状态粗颗粒盐渍土层上拔角分别约为32°,34°及18°。
    Abstract: Based on the uplift model tests, the uplift working behaviors of belled pier foundation with different thicknesses and crystalline and dissolved states of coarse-grained salty soils are obtained. The results show that the uplift loads lead to obvious ground heave surrounding the belled pier foundation, which induces circumferential and radial cracks in the soils around the foundation. Moreover, the ground heave extent is approximately circular as the uplift loads increase. The uplift displacement decreases with the growing distance from the center of foundation, and the uplift displacement gradient increases with the increasing uplift loads. The load-displacement curves exhibit a typical softening tendency. The uplift bearing capacity of salty soils in the crystalline state increases at larger thickness of coarse-grained salty soils, and is also higher for the salty soils in crystalline state than that for the salty soils in dissolved state. The geometric shape of failure surface can be described by a straight line equation with slope in the underlying coarse-grained soils different from that in the surface salty soils. The uplift angles of the surface salty soils in crystalline and dissolved states are approximately 34°and 18°, respectively, while 32°for the underlying soils without salt.
  • [1] 华遵孟, 沈求武. 西北内陆盆地粗颗粒盐渍土研究[J]. 工程勘察, 2001(1): 28-31.
    (HUA Zun-meng, SHEN Qiu-wu.Study on coarse saline soil of north-western inland basin[J]. Geotechnical Investigation & Surveying, 2001(1): 28-31. (in Chinese))
    [2] 程东幸, 许健, 刘志伟, 等. 粗颗粒盐渍土大型剪切强度试验研究[J]. 水利与建筑工程学报, 2017, 15(5): 149-153.
    (CHENG Dong-xing, XU Jian, LIU Zhi-wei, et al.Experiments on large-scale direct shear strength of coarse-grained saline soil[J]. Journal of Water Resources and Architectural Engineering, 2017, 15(5): 149-153. (in Chinese))
    [3] 鲁先龙, 乾增珍, 童瑞铭, 等.戈壁地基扩底掏挖基础抗拔试验及其位移计算[J]. 岩土力学, 2014, 35(7): 1871-1877.
    (LU Xian-long, QIAN Zeng-zhen, TONG Rui-ming, et al.Uplift field tests and displacement prediction on belled piers in Gobi[J]. Rock and Soil Mechanics, 2014, 35(7): 1871-1877. (in Chinese))
    [4] 刘志伟, 程东幸, 张希宏. 粗颗粒盐渍土回填碾压试验研究[J]. 工程勘察, 2012(6): 18-21.
    (LIU Zhi-wei, CHENG Dong-xing, ZHANG Xi-hong.Experimental study on back filling and rolling compaction of coarse-grained salty soil[J]. Geotechnical Investigation & Surveying, 2012(6): 18-21. (in Chinese))
    [5] DL/T 5219—2014架空输电线路基础设计技术规程[S]. 2014.
    (DL/T 5219—2014 Technical code for design of foundation of overhead transmission line[S]. 2014. (in Chinese))
    [6] 郝冬雪, 张永建, 陈榕, 等. 输电线路掏挖基础极限上拔承载力变分解法[J]. 岩土力学, 2015, 36(1): 163-170.
    (HAO Dong-xue, ZHANG Yong-jian, CHEN Rong, et al.Variational solution of ultimate uplift capacity for excavated foundation of transmission tower[J]. Rock and Soil Mechanics, 2015, 36(1): 163-170. (in Chinese))
    [7] GURUNG S B, NAKAZIMA Y, SAKAJO S, et al.Centrifugal modeling of enlarged base foundation subjected to pull-out force[J]. Soils and Foundations, 1998, 38(4): 105-113.
    [8] CHAE D, CHO W, NA H Y.Uplift capacity of belled pile in weathered sandstone[J]. International Journal of Offshore and Polar Engineering, 2012, 22(4): 297-305.
    [9] NAZIR R, MOAYEDI H, PRATIKSO A, et al.The uplift load capacity of an enlarged base pier embedded in dry sand[J]. Arabian Journal of Geosciences, 2015, 8(9): 7285-7296.
    [10] DICKIN E A, LEUNG C F.The influence of foundation geometry on the uplift behaviour of piles with enlarged bases[J]. Canadian Geotechnical Journal, 2011, 29(3): 498-505.
    [11] LU X L, QIAN Z Z, YANG W Z.Axial uplift behaviour of belled piers in sloping ground[J]. Geotechnical Testing Journal, 2017, 40(4): 579-590.
    [12] 刘生奎, 李永祥. 掏挖基础在西北戈壁地区的应用探讨[J].电网与水力发电进展, 2008, 24(1): 46-49.
    (LIU Sheng-kui, LI Yong-xiang.Research on application of excavated foundation for steel towers in northwest stone desert[J]. Advances of Power System & Hydroelectric Engineering, 2008, 24(1): 46-49. (in Chinese))
    [13] 安维忠, 李永祥, 刘生奎. 输电线路戈壁碎石土地基现场直剪实验[J]. 电力建设, 2010, 31(5): 66-69.
    (AN Wei-zhong, LI Yong-xiang, LIU Sheng-kui.Field direct shearing tests of gobi gavel soil in northwest for 750 kV transmission line engineering[J]. Electric Power Construction, 2010, 31(5): 66-69. (in Chinese))
    [14] 鲁先龙, 郑卫锋, 程永锋, 等. 戈壁滩输电线路碎石土地基全掏挖基础试验研究[J]. 岩土工程学报, 2009, 31(11): 1779-1783.
    (LU Xian-long, ZHENG Wei-feng, CHENG Yong-feng, et al.Experimental study on excavated foundation of transmission line gravelly soils in gobi area of Northwest China[J]. Chinese Journal of Geotechnical Engineering, 2009, 31(11): 1779-1783. (in Chinese))
    [15] QIAN Z Z, LU X L, HAN X, et al.Interpretation of uplift load tests on belled piers in Gobi gravel[J]. Canadian Geotechnical Journal, 2015, 52(7): 992-997.
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出版历程
  • 收稿日期:  2019-03-03
  • 发布日期:  2019-11-24

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