上海交通大学学报

上海交通大学学报 >

2021 , Vol. 55 >Issue 9: 1126 - 1133

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2020.383

基于虚拟柱状等效模型的桩基沉降位移计算方法

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  • 1.上海城建市政工程集团有限公司, 上海 200030
    2.上海交通大学 船舶海洋与建筑工程学院, 上海 200240
王荣勇(1987-),男,江苏省南通市人,工程师,从事地下工程研究.

收稿日期: 2020-11-23

  网络出版日期: 2021-06-08

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Calculation Method of Pile Foundation Settlement Displacement Based on Virtual Column Equivalent Model

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  • 1. Shanghai Urban Construction Municipal Engineering (Group), Co., Ltd., Shanghai 200030, China
    2. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Received date: 2020-11-23

  Online published: 2021-06-08

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摘要

根据软土地层桩基工程特性,提出符合工程特点的虚拟柱状结构模型,建立桩基沉降位移理论解.研究软土地层中桩基荷载的传递特性、桩基承载模式及其随荷载与环境条件逐步演化的动态关系.结果表明:桩基存在摩擦承载和摩擦+桩端承载模式,且随桩顶荷载、施工和环境因素显著变化.同时,受荷载的传递规律影响,桩基轴向存在0轴力断面,其深度与桩基长度的大小关系影响桩基的承载模式类型和位移计算结果.现场结果对比验证了理论方法的正确性和适用性.

关键词： 桩基承载模式; 沉降位移; 虚拟柱状等效模型; 理论解

本文引用格式

王荣勇, 柳林齐, 王颖轶, 黄醒春 . 基于虚拟柱状等效模型的桩基沉降位移计算方法[J]. 上海交通大学学报, 2021 , 55(9) : 1126 -1133 . DOI: 10.16183/j.cnki.jsjtu.2020.383

Abstract

According to the engineering characteristics of pile foundation in soft soil layer, a virtual column structure model was proposed, and a theoretical solution to pile foundation settlement displacement was established. Besides, the load transfer characteristics of pile foundation in soft soil layer, the bearing mode of pile foundation, and its dynamic relationship with the gradual evolution of load and environmental conditions were studied. The results show that there are friction bearing and friction with pile end bearing modes in pile foundation, and they change significantly with pile top load, construction, and environmental factors. Affected by the load transfer law, there is a 0-axis force section in the axial direction of pile foundation. The relationship between the depth and the length of pile foundation affects the type of bearing mode and displacement calculation results. The field results verify the correctness and applicability of the theoretical method.

Key words： bearing mode of pile foundation; settlement displacement; virtual column equivalent model; theoretical solution

参考文献

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