PST管桩在软土地基中的荷载-位移响应分析研究  

Analytical study on load-displacement response of PST pipe piles in soft ground foundation

作　　者：林燕紫 LIN Yanzi(Fujian Provincial Institute of Architectural Design and Research CO.,LTD.,Fuzhou 350108)

机构地区：[1]福建省建筑设计研究院有限公司,福建福州350108

出　　处：《福建建筑》2025年第2期74-77,145,共5页Fujian Architecture & Construction

摘　　要：PST管桩(预制竖向劲性体)因其施工质量易控、施工速度快等特点,被广泛应用于软土地基的加固处理。通过现场实测和数值模拟方法,对PST管桩在软土地基加固工程中的承载特性和位移行为进行分级加载研究,同时为弱化线弹性模型对管桩的简化效应,采用荷载传递法分析桩径与桩长对极限承载力的影响。研究结果显示,PST管桩能够有效地控制软土地基的表面沉降,桩径与桩长都会影响极限承载力的增长速率。PST pipe piles(prefabricated vertical stiffener)are widely used in the reinforcement treatment of soft ground because of its easy-to-control construction quality and fast construction speed.In this paper,the bearing characteristics and displacement behavior of PST tubular piles in soft ground reinforcement project are investigated by graded loading through on-site measurement and numerical simulation methods.Meanwhile,in order to weaken the simplification effect of linear elastic model on tubular piles,the effects of pile diameter and pile length on ultimate bearing capacity are analyzed by load transfer method.The results show that PST piles can effectively control the surface settlement of soft ground,and both pile diameter and pile length affect the growth rate of ultimate bearing capacity.

关 键 词：单桩 软土地基 荷载传递法 有限元模拟 承载特性 

分 类 号：TU4[建筑科学—土工工程]