A calculation method of frost heave effect of lattice beam and anchor composite structure in cold regions

被引：0
|
作者：
Dong J. [1 ,2 ]
Liu K. [1 ,2 ]
Dong X. [1 ,2 ]
Sun G. [1 ,2 ]
机构：
[1] Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou, 730050, Gansu
[2] Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou, 730050, Gansu
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2020年 / 39卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Beam on elastic foundation; Compound structure of lattice beam and anchor; Finite difference method; Frost heave; Permafrost slopes; Soil mechanics;
D O I：
10.13722/j.cnki.jrme.2019.0637
中图分类号：
学科分类号：
摘要：
In order to study the variations of the deformation and internal force under frost heave effect of lattice beam and anchor composite structure in cold regions, a calculation model of the composite structure considering frost heave is established basing on Winkler elastic foundation beam theory. Considering coordinated deformation of the soil and the support structure and regarding the frost heave displacement of soil as the superposition of free frost heave and constrained frost heave, a calculation expression of frost heave force is given, and calculation formulas of deformation and internal force of lattice beam under frost heave effect are derived by using the finite difference method. An example is illustrated, and it is shown that the displacement and internal force of the compound structure is very significant while considering frost heave effect, which indicates that the frost heaving force should be considered and enough safety margin should be set aside for the design of permafrost slope supporting projects. Comparisons between the model test results and the theoretical calculation show that the values of displacement and internal force of the lattice beam and the anchor tension are basically consistent as well as their variation trends, which indicates that the calculation method of frost heave effect is reasonable and feasible and provides a new idea for the analysis and design of the compound structure of lattice beam and anchor in frozen soil areas. © 2020, Science Press. All right reserved.
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页码：984 / 995
页数：11
相关论文
共 20 条
  • [1] CHEN Mo, Influences of frost heaving on the stability of soil nailing wall over winter in northern China, Soil Engineering and Foundation, 25, 4, pp. 25-29, (2011)
  • [2] WANG Jiawei, Study on the security of a ultra-deep foundation pit with the pile-anchor support structure in the seasonal frozen earth, Journal of Transport Science and Engineering, 28, 1, pp. 52-56, (2012)
  • [3] ZHANG Zhihao, MA Lin, HAN Xiaomeng, Et al., Frost heaving deformation control of pile-anchor retaining structure of deep foundation pits in seasonal frozen soil regions, Chinese Journal of Geotechnical Engineering, 34, pp. 65-71, (2012)
  • [4] WANG Ningwei, JIAO Jun, HU Wenhao, The effect of seasonal frost heave on the safety of deep foundation pit, Proceedings of the 21th National Conference on Structural Engineering Volume I, pp. 424-427, (2012)
  • [5] KONG Debao, Monitoring and numerical simulation of retaining wall in permafrost regions, (2013)
  • [6] ZHU M, MICHALOWSKI R L., A numerical approach to simulate soil freezing and frost heave behind an earth retaining structure, ASCE International Workshop on Computing in Civil Engineering, pp. 307-314, (2014)
  • [7] SUN Chao, ZHOU Yansheng, Impact of soil heave on pile supporting structure, Journal of Engineering Geology, 23, pp. 57-62, (2015)
  • [8] RUI D., Full-scale model test on prevention of frost heave of L-type retaining wall, Cold Regions Science and Technology, 132, pp. 89-104, (2016)
  • [9] TANG Renhua, CHEN Changfu, LIANG Guanting, System reliability analysis of frame prestressed anchor bolt, Chinese Journal of Rock Mechanics and Engineering, 32, 12, pp. 2520-2526, (2013)
  • [10] ZHU Baolong, YANG Ming, HU Houtian, Et al., Testing study on internal forces for prestressed anchor cable frame in reinforced soil slope, Chinese Journal of Rock Mechanics and Engineering, 24, 4, pp. 697-702, (2005)
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