[1]曾锦秀.基于上限法的边坡双排抗滑桩变形计算方法[J].福建工程学院学报,2021,19(06):548-544.[doi:10.3969/j.issn.1672-4348.2021.06.006]
　ZENG Jinxiu.Deformation calculation method of double-row stabilizing piles 〖JZ〗in slopes based on kinematical limit analysis[J].Journal of FuJian University of Technology,2021,19(06):548-544.[doi:10.3969/j.issn.1672-4348.2021.06.006]
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基于上限法的边坡双排抗滑桩变形计算方法()
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《福建工程学院学报》[ISSN:2097-3853/CN:35-1351/Z]

卷:
第19卷
期数:
2021年06期
页码:
548-544
栏目:
出版日期:
2021-12-25

文章信息/Info

Title:
Deformation calculation method of double-row stabilizing piles 〖JZ〗in slopes based on kinematical limit analysis
作者:
曾锦秀
福建船政交通职业学院
Author(s):
ZENG Jinxiu
School of Civil Engineering, Fujian Chuanzheng Communications College
关键词:
边坡;  双排桩;  极限分析;  平面刚架;  弹性地基梁
Keywords:
slope;  double-row piles;  limit analysis;  plane rigid frame;  beam-on-elastic-foundation
分类号:
TU431
DOI:
10.3969/j.issn.1672-4348.2021.06.006
文献标志码:
A
摘要:
基于上限法、平面刚架理论与弹性地基梁理论，对双排桩加固边坡中结构变形进行解析，通过数值模拟验证所提方法的合理性，研究了影响双排桩桩身位移的6 个因素。结果表明:当连系梁厚度/ 桩径小于0.7、嵌固段与受荷段长度之比小于0.8、桩径小于1.0 左右时，对桩身位移影响较大，且呈现出明显的非线性特征?桩身弹性模量对双排桩桩身位移同样具有较大影响，但表现出近似线性的特征。对于双排桩加固边坡，可适当增大连系梁厚度、嵌固段长度、桩径、桩身弹性模量或联合注浆改善桩周岩土体的力学性能。研究结果可为边坡中双排桩的设计提供参考。
Abstract:
Based on the upper limit method, the plane rigid frame model and beam-on-elastic-foundation model, the deformation of the structure in the slope reinforced by double-row piles was analyzed; the rationality of the proposed method was verified by numerical simulation, and then the six factors affecting the displacement of the double-row piles were studied using the proposed theoretical calculation method. Results show that the displacement of double-row piles is greatly affected when the ratio of the thickness of connecting beam to the pile diameter is less than 0.7, the ratio of embedded length to loaded length is less than 0.8, and the pile diameter is less than 1.0, and it shows obvious nonlinear characteristics; it is also significantly affected by the elastic modulus of the pile, but it shows a nearly linear characteristic. For the slope reinforced with double-row piles, the thickness of the connecting beam, length of the embedded section, pile diameter, elastic modulus of the pile body can be appropriately increased, or the measures, such as grouting, to improve the mechanical properties of rock and soil around the piles can be taken. The research results can provide references for similar projects.

参考文献/References:

[1] 刘平, 杜晓方. 地面超载对双排桩基坑稳定性影响的有限元分析[J]. 中外公路, 2018, 38（6）: 14-20. [2] 张玲, 朱幸仁, 欧强. 考虑桩桩相互作用的双排支护桩受力变形分析[J]. 水文地质工程地质, 2019, 46（5）: 72-80. [3] 邱俊杰, 王宁, 罗程鸿. 砂质高边坡路堑工程双排桩支护结构数值分析[J]. 路基工程, 2020（2）: 74-79, 86. [4] 郑刚, 衣凡, 黄天明, 等. 超挖引起双排桩支护基坑倾覆型连续破坏机理研究[J]. 岩土工程学报, 2021, 43（8）: 1373-1381. [5] CHEN W F. Limit analysis and soil plasticity[M]. Amsterdam: Elsevier Science, 1975: 251-252.[6] ZENG J X, XIAO S G. A simplified analytical method for stabilizing micropile groups in slope engineering[J]. International Journal of Civil Engineering, 2020, 18（2）: 199-214. [7] AUSILIO E, CONTE E, DENTE G. Stability analysis of slopes reinforced with piles[J]. Computers and Geotechnics, 2001, 28（8）: 591-611. [8] 曾锦秀. 板连式束筋微型抗滑桩群加固边坡机制与计算理论研究[D]. 成都: 西南交通大学, 2019.

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更新日期/Last Update: 2021-12-25