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软土区高架桥下道路施工期对桩基影响分析
邹永诚¹,罗斌¹,张亚磊²,向敏²
(1. 台州市城乡规划设计研究院有限公司,浙江 台州 318002;2. 石家庄铁道大学,河北 石家庄 050043)

摘  要:软土区在高架桥下道路的施工过程中,桩基的受力特性会产生明显的变化,施工期桩基土体固结沉降,导致桩身上部出现负摩阻力,从而使桩身轴力增大。文章以甬莞高速某高架桥群桩基础为研究对象,监测高架桥及桥下道路施工过程中桩基的轴力变化;采用 Midas GTS/NX 有限元软件,建立考虑桩 - 土接触面参数 Rinter 的数值模型,通过数值模拟结果与监测值对比分析,探究施工工序对高架桥桩基受力特性的影响。


关键词:桩基受力特性;负摩阻力;现场试验



DOI:10.19850/j.cnki.2096-4706.2022.08.034


中图分类号:TP391.9;TU473.1                           文献标识码:A                                文章编号:2096-4706(2022)08-0123-04


Analysis on the Influence of Pile Foundation during Construction Period of Road under Viaduct in Soft Soil Area

ZOU Yongcheng1, LUO Bin1, ZHANG Yalei 2, XIANG Min2

(1.Taizhou Urban and Rural Planning and Design Institute Co., Ltd., Taizhou 318002, China; 2.Shijiazhuang Tiedao University, Shijiazhuang 050043, China)

Abstract: During the construction process of the road under the viaduct in soft soil area, force characteristics of pile foundation will produce obvious changes. During the construction period, the consolidation and settlement of pile foundation soil body leads to the appearance of negative friction resistance on the pile upper body, so that the pile body shaft force increases. This paper takes the viaduct pile group foundation of the Yongguan expressway as the research object to monitor the axial force change of the pile foundation during the construction process of the viaduct and the road under the viaduct. It uses Midas GTS/NX finite element software to establish a numerical model considering the parameter Rinter of the pile-soil contact surface, and explores the influence of the construction process on the force characteristics of the viaduct pile foundation through the comparative analysis of the numerical simulation results and the monitoring value.

Keywords: force characteristics of pile foundation; negative friction resistance; field test


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作者简介:邹永诚(1979.06—),男,汉族,江西乐安人,副总经理高级工程师,硕士研究生,主要研究方向:道桥设计、软基研究。