(河南大学土木建筑学院，开封 475001)

［摘要］通过刚性桩复合地基群桩(桩数3×3)模型试验，对不同垫层厚度刚性桩复合地基的变形特性、不同桩位桩体和桩间土的受力特性进行测试，并对桩土应力比和荷载分担比等反映桩土共同工作性能的指标进行分析，得出了刚性桩复合地基的承载特性和变形规律。结论可为刚性桩复合地基的优化设计提供依据。

［关键词］复合地基；刚性桩；模型试验；垫层

Model experimental study on composite foundation with rigid piles

Li Li, Bao Peng, Zhao Jie(School of Civil Engineering and Architecture, Henan University, Kaifeng 475001, China)

Abstract:Through the experimental research on rigid pile composite foundation group piles (pile number of 3×3) model, the deformation characteristics, force characteristics of piles and soil of rigid pile composite foundation with different cushion thickness are tested. The pile-soil stress ratio and load-sharing ratio which reflect the pile-soil interaction characteristic are analyzed, and bearing characteristics and deformation laws of rigid pile composite foundation are obtained. The conclusions can provide a basis for optimal design of the rigid pile composite foundation.

Keywords:composite foundation; rigid piles; model experiment; cushion

*河南省科技攻关计划项目(496260015)。

作者简介：李丽，硕士，副教授，Email：lylylee@163.com。

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