考虑软弱夹土层的预应力管桩施工影响因素分析  

ANALYSIS OF INFLUENCING FACTORS OF PRESTRESSED PIPE PILE CONSTRUCTION CONSIDERING SOFT SOIL LAYER

作　　者：王海宁 WANG Hai-ning(China Anneng Group Second Engineering Bureau Co.,Ltd.,330000,Nanchang,Jiangxi,China)

机构地区：[1]中国安能集团第二工程局有限公司,南昌330000

出　　处：《建筑技术》2024年第19期2404-2407,共4页Architecture Technology

摘　　要：预应力管桩具有单桩承载力强、适应性强等优势,在越来越多的工程被广泛应用。本研究以河南某产业园实际工程为例,基于有限元软件ABAQUS构建了土体(欧拉体)–桩基(实体)三维数值模型(CEL法),考虑实际工程沉桩过程中预应力管桩不同的桩距及数量,对比分析软弱夹土层应力与桩基沉桩时间的响应规律。研究表明:桩间软弱土层的最大应力呈现出随着桩距的增大而逐渐减少的规律;随着桩的数量增加,在一定程度上增加了桩间软弱土层的最大应力。本研究可为软弱夹土层场地下预应力管桩的施工关键技术提供理论依据。Prestressed pipe piles have the advantages of high bearing capacity and adaptability,so they are applied widely in more and more projects.Taking an industrial park in Henan Province as an example,a soil(Euler)-pile foundation(solid)3D numerical model(CEL method)was built with finite element software ABAQUS.Considering the pitch and quantity of prestressed pipe piles in the pile sinking process of the project,the response rules of the stress in the soft soil layer and the pile sinking time of the pile foundation were comparatively analyzed.Results show that the maximum stress of the soft soil layer decreases with the pile pitch increasing;and an increase in the number of piles leads to an increase in the maximum stress of the soft soil layer between piles to some extent.This study provides a theoretical basis for the key construction technology of underground prestressed pipe piles in soft soil layers.

关 键 词：预应力管桩 软弱夹土层 CEL方法 数值模拟 有限元 三维数值模型 

分 类 号：TU74[建筑科学—建筑技术科学]