粉质黏土中倾斜螺旋锚受力性能及变形计算研究

张权; 鲍俊立; 周怡; 王志博; 郭咏华; 屈讼昭

doi:10.3724/j.gyjzG24050801

粉质黏土中倾斜螺旋锚受力性能及变形计算研究

doi: 10.3724/j.gyjzG24050801

张权^1,2,
鲍俊立³,
周怡³,
王志博⁴,
郭咏华⁵,
屈讼昭^2, ,

1. 中原工学院建筑工程学院, 郑州 450000;
2. 河南城建学院土木与交通工程学院, 河南平顶山 467000;
3. 国家电网河南省电力公司, 郑州 450000;
4. 国家电网开封供电公司, 河南开封 475000;
5. 中国电建集团河南省电力勘测设计院有限公司, 郑州 450000

详细信息

作者简介:
张权,硕士研究生,主要从事螺旋锚承载机理方面研究,1436966514@qq.com。

通讯作者:
屈讼昭,博士,副教授,硕士生导师,主要从事钢结构力学性能、微观断裂损伤机理及螺旋锚力学性能方面研究,qusongzhao@huuc.edu.cn。

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出版历程
- 收稿日期: 2024-05-08
- 网络出版日期: 2026-06-06
- 刊出日期: 2026-04-20

Research on the Mechanical Properties and Deformation Calculation of Inclined Helical Anchors in Silty Clay

1. Shool of Civil Engineering and Architecture, Zhongyuan University of Technology, Zhengzhou 450000, China;
2. School of Civil Engineering and Transportation, Henan University of Urban Construction, Pingdingshan 467000, China;
3. State Grid Henan Electric Power Company, Zhengzhou 450000, China;
4. State Grid Kaifeng Power Supply Company, Kaifeng 475000, China;
5. China Electric Power Construction Group Henan Electric Power Survey & Design Institute, Zhengzhou 450000, China

摘要

摘要: 近年来，随着高压输电线路、海洋风电的逐步扩展和开发，螺旋锚已在建筑、电力等领域得到了应用，其对基础承载性能和使用场景提出了更高的需求。然而，当前螺旋锚基础承载力计算模型仅针对砂土和黏土提出。土质条件中同时存在较大的黏聚力c和内摩擦角φ时，承载力计算式的适用性未经过充分的论证。因此，对粉质黏土中的倾斜螺旋单锚展开了原位试验研究和数值分析，阐明倾斜螺旋锚拉压荷载作用下的传力路径，揭示其在复杂成层土中的失效模式，论证了当前承载力计算方法对粉质黏土的适用性，基于t-z曲线法建立螺旋锚竖向变形计算模型。结果表明：螺旋锚钻入造成的土体扰动，使得下压承载力高于上拔承载力；上拔、下压工况下顶部锚盘承担的荷载占比约为15%；按DL/T 5219—2023《架空输电线路基础设计技术规程》计算承载力时，同时考虑c和φ是不合适的，而是需要分开考虑；通过对提出的螺旋锚竖向变形理论计算式修正之后，承载力和实际承载力吻合较好时，计算的竖向变形和荷载-位移曲线吻合好，预测精度高。
- 粉质黏土 /
- 倾斜螺旋单锚 /
- 原位试验 /
- 数值分析 /
- t-z曲线法
Abstract: In recent years， with the gradual expansion and development of high-voltage transmission lines and offshore wind power， spiral anchors have been applied in fields such as construction and power engineering. Therefore， higher demands have been put forward for the basic load-bearing performance and usage scenarios. However， the current calculation model for the basic bearing capacity of helical anchors is only proposed for sand and clay. When the soil exhibits cohesive force and internal friction angle simultaneously in the soil conditions， the applicability of the bearing capacity calculation formula has not been fully validated. Therefore， this study conducted in-situ experimental research and numerical analysis on inclined helical single anchors in silty clay， elucidated the force transmission path under the tension and compression loads of inclined helical anchors， revealed the failure modes in complex stratified soils， demonstrated the applicability of the current bearing capacity calculation methods for silty clay， and established a vertical deformation calculation model for helical anchors based on the t-z curve method. The results indicated that the soil disturbance caused by helical anchor drilling resulted in a higher compressive bearing capacity than an uplift bearing capacity. The load borne by the top anchor plate under upward and compression conditions accounted for about 15% of the total load. When calculating the bearing capacity according to the regulation， it was not appropriate to consider both c and φ simultaneously； instead， they should be considered separately. When the corrected bearing capacity matched the actual bearing capacity well， the calculated vertical deformation and load displacement curves matched well， and the theoretical formula demonstrated high prediction accuracy.
- silty clay /
- inclined helical anchor /
- in-situ test /
- numerical simulation /
- t-z curve method

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参考文献(27)

[1]	PERKO H A. Helical piles:a practical guide to design and installation［M］. Hoboken：John Wiley & Sons，2009.
[2]	BAILEY H，SENIOR B，SIMMONS D，et al. Assessing underwater noise levels during pile-driving at an offshore windfarm and its potential effects on marine mammals［J］. Marine Pollution Bulletin，2010，60（6）：888-897.
[3]	CERFONTAINE B，KNAPPETT J A，BROWN M J，et al. A finite element approach for determining the full load-displacement relationship of axially loaded shallow screw anchors，incorporating installation effects［J］. Canadian Geotechnical Journal，2021，58（4）：565-582.
[4]	HAO D，WANG D，O’LOUGHLIN C D，et al. Tensile monotonic capacity of helical anchors in sand：interaction between helices［J］. Canadian Geotechnical Journal，2019，56（10）：1534-1543.
[5]	MITCHELL A. On sub-marine foundations； particularly the screw-pile and moorings［J］. Journal of the Franklin Institute，1848，45（6）：393-396.
[6]	LEE J，KWON O，KIM I，et al. Cyclic pullout behavior of helical anchors for offshore floating structures under inclined loading condition［J］. Applied Ocean Research，2019，92：101937.
[7]	郝冬雪，王磊，陈榕，等. 冻融循环下粉砂中螺旋锚抗拔稳定模型试验研究［J］. 岩土工程学报，2023，45（1）：57-65.
[8]	FENG S J，FU W D，CHEN H X，et al. Field tests of micro screw anchor piles under different loading conditions at three soil sites［J］. Bulletin of Engineering Geology and the Environment，2021，80：127-144.
[9]	胡伟，杨瑶，刘顺凯，等. 光伏支架螺旋桩斜向拉拔承载特性试验研究［J］. 太阳能学报，2022，43（12）：50-61.
[10]	李逸奇，胡伟，杨枭，等. 砂土中多锚片螺旋锚上拔承载力计算方法研究［J/OL］. 海洋工程，2024［2024-03-28］. http://kns.cnki.net/kcms/detail/32.1423.P.20230707.1123.002.html.
[11]	史旦达，俞快，毛逸瑶，等. 松砂中双叶片螺旋锚上拔承载及土体变形特性试验研究［J］. 岩土力学，2022，43（11）：3059-3072.
[12]	陈俊锋，杨守富，段译斐，等. 黄土地区螺旋锚基础承载力试验研究［J/OL］. 应用力学学报，2024［2024-05-21］. http://kns.cnki.net/kcms/detail/61.1112.O3.20240322.1032.002.html.
[13]	YU H，ZHOU H，SHEIL B，et al. Finite element modelling of helical pile installation and its influence on uplift capacity in strain softening clay［J］. Canadian Geotechnical Journal，2022，59（12）：2050-2066.
[14]	YUAN C，HAO D，CHEN R，et al. Numerical investigation of uplift failure mode and capacity estimation for deep helical anchors in sand［J］. Journal of Marine Science and Engineering，2023，11（8）：1547.
[15]	张博，屈讼昭，刘光辉，等. 粉土中螺旋锚循环上拔承载特性原位试验研究［J］. 工业建筑，2023，53（12）：204-210.
[16]	屈讼昭，郭咏华，王仪，等. 大锚片螺旋锚在粉质黏土中上拔受力性能的原位试验研究及数值模拟分析［J］. 岩石力学与工程学报，2020，39（增刊2）：3655-3668.
[17]	屈讼昭，郭咏华，王仪，等. 大锚片螺旋锚在粉质黏土中的下压承载性能［J］. 土木与环境工程学报（中英文），2021，43（5）：34-44.
[18]	电力规划设计标准化技术委员会. 架空输电线路基础设计技术规程：DL/T 5219—2023［S］. 北京：中国电力出版社，2024.
[19]	国家电网有限公司科技部. 架空输电线路螺旋锚基础设计技术规范：Q/GDW 10584—2022［S］. 北京：中国电力出版社，2022.
[20]	British Standards Institution. Code of practice for foundations:BS 8004 ∶1986［S］. London：British Standards Institution，1986.
[21]	LUTENEGGER A J. Cylindrical shear or plate bearing?：uplift behavior of multi-helix screw anchors in clay［M］// Contemporary Topics in Deep Foundations. 2009：456-463.
[22]	QU S，ZHANG Q，GUO Y. Experimental and numerical studies of the failure mode and mechanical performance of helices in screw piles［J］. International Journal of Civil Engineering，2024，22：839-857.
[23]	PEREZ Z A，SCHIAVON J A，TSUHA C H C，et al. Numerical and experimental study on influence of installation effects on behaviour of helical anchors in very dense sand［J］. Canadian Geotechnical Journal，2018，55（8）：1067-1080.
[24]	KWON O，LEE J，KIM G，et al. Investigation of pullout load capacity for helical anchors subjected to inclined loading conditions using coupled Eulerian-Lagrangian analyses［J］. Computers and Geotechnics，2019，111：66-75.
[25]	QIU G，HENKE S，GRABE J. Application of a Coupled Eulerian-Lagrangian approach on geomechanical problems involving large deformations［J］. Computers and Geotechnics，2011，38（1）：30-39.
[26]	Hubbell Power Systems，Inc. Chance technicial design manual：ANSI［S］. Centralia Missouri：Hubbell Power Systems，Inc，2023.
[27]	American Petroleum Institute． Geotechnical and foundation design considerations:ANSI/API recommended practice 2 GEO［S］． Washington D．C．：American Petroleum Institute，2014．