基于GTS对引孔灌土锤击沉桩承载力的数值分析  

Numerical Analysis of the Bearing Capacity of Soil-filled Pile Driving by Guided Boring Based on GTS

作　　者：方明 林惠庭 唐俊 邝悦峰 何余钧 FANG Ming;LIN Hui-ting;TANG Jun;KUANG Yue-feng;HE Yu-jun(Zhuhai Doumen District Construction Project Quality Monitoring Station,Zhuhai 519125;Changyu(Zhuhai)International Architectural Design Co.,Ltd.,Zhuhai 519100)

机构地区：[1]珠海市斗门区建设工程质量监督检测站,珠海519125 [2]长宇(珠海)国际建筑设计有限公司,珠海519100

出　　处：《广州建筑》2025年第2期24-28,共5页GUANGZHOU ARCHITECTURE

摘　　要：本文采用有限元GTS软件对采用引孔灌土锤击工艺沉桩的单桩极限承载力静载荷试验进行模拟分析;该方法采用摩尔-库伦模型确定土体本构关系,在桩土之间设置桩界面单元,结合珠海市斗门区某工程实例,通过Midas GTS有限元分析软件建立有限元模型,将单桩静载模拟结果与实际静载试验结果进行了对比。结果表明,通过正确地设置桩土参数,数值模拟分析得出的Q-s曲线与实测Q-s曲线趋势一致,数值相近,且软弱土层深度范围内桩侧摩阻力很小,与实际桩侧摩阻力分布情况相符,说明模拟结果有效,并根据相关规范取拟合的Q-s曲线s=40 mm所对应的荷载值作为单桩极限承载力,计算出本项目工程地质条件下工程桩的单桩极限承载力为6452 kN。本文为无静载试验数据情况下确定引孔灌土锤击管桩竖向抗压承载力提供一个参考依据。This article uses the finite element GTS software to simulate and analyze the static load test of the ultimate bearing capacity of a single pile using the drilling and soil injection hammering process;This method uses the Moore Coulomb model to determine the constitutive relationship of soil,sets up pile interface elements between piles and soil,and combines with a project example in Doumen District,Zhuhai City.A finite element model is established using Midas GTS finite element analysis software.The simulation results of single pile static load are compared with the actual static load test results.The results show that by correctly setting the pile-soil parameters,the Q-s curve obtained from numerical simulation analysis is consistent with the measured Q-s curve trend and has similar values.Moreover,the pile side friction resistance is very small within the depth range of the weak soil layer,which is consistent with the actual distribution of pile side friction resistance.This indicates that the simulation results are effective.According to relevant specifications,the load value corresponding to the fitted Q-s curve s=40 mm is taken as the single pile.The ultimate bearing capacity of the engineering pile under the geological conditions of this project is calculated to be 6452 kN.This article provides a reference basis for determining the vertical compressive bearing capacity of drilled soil hammer driven pipe piles without static load test data.

关 键 词：GTS 有限元 引孔灌土锤击沉桩 竖向抗压承载力 摩尔-库伦模型 

分 类 号：TU375[建筑科学—结构工程]