(1 湖南科技学院土木工程与建设管理系，永州 425100；2 湘潭大学土木工程与力学学院，湘潭 411105)

［摘要］利用ANSYS有限元软件，针对群桩水平力学响应问题，进行了三维有限元数值模拟，验证了模型的正确性。在此基础上，对水平受荷群桩基础进行不同工况的计算分析，探讨了桩距、桩长和桩径各种因素对群桩工作性状的影响。分析表明，桩距与桩径对水平受荷群桩工作性状影响较大，桩长对其影响较小，8倍桩径为群桩效应的临界桩距，加大桩径能明显控制桩头侧移，提高桩的承载能力。

［关键词］桩距；桩长；桩径；荷载分担；桩身位移；桩身弯矩

Parameter analysis on the behavior of lateral-load pile groups

Hu Tingting1, Liu Zhong2, Wu Tengfeng2, Hu Zhe2

(1 Department of Civil Engineering and Construction Management, Hunan University of Science and Engineering,

Yongzhou 425100, China; 2 College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China)

Abstract:Using finite element program ANSYS, the three-dimensional finite element numerical simulation on the lateral nonlinear response of pile groups was carried out, and the correctness of the model was verified. The calculation and analysis of the lateral-load pile groups under different conditions were discussed, and the various factors, such as pile space, pile length, pile diameter, acting on the behavior of the lateral-load pile groups were also discussed. The analysis results show that the pile space and the pile diameter have a greater impact on the behavior of the lateral-load pile groups, and the pile length has a lower impact. Eight-time pile diameter is the critical pile space of the pile group effect. Increasing pile diameter can control the lateral displacement of the pile obviously and improve the bearing capacity.

Keywords:pile space; pile length; pile diameter; load-sharing; pile displacement; pile moment

作者简介：胡婷婷，硕士，助教，Email:hutingting19831204@163.com。

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