高层建筑工程中大直径灌注桩承载力试验研究  

Experimental Study on Bearing Capacity of Large-Diameter Cast-in-Place Piles in High-Rise Building Projects

作　　者：孙学龙 SUN Xuelong(Jiangxi Zhongchang Testing Co.,Ltd.,Nanchang Jiangxi 330000,China)

机构地区：[1]江西中昌检测有限公司,江西南昌330000

出　　处：《北方建筑》2024年第5期70-73,104,共5页Northern Architecture

摘　　要：本文以某高层建筑工程为例,开展大直径灌注桩承载力试验研究,以确保高层建筑具有较好的稳定性。本研究依靠堆载反力系统,通过千斤顶逐步施加静荷载至桩体破坏,在每段加载完成后,分别在5 min,10 min和15 min测量一次桩体的计算变形,记录并分析结果。通过试验得出,五根试验桩的极限承载力各不相同,最大荷载值高达15000 kN,而最小荷载值为750 kN。大直径灌注桩承载力由桩侧阻力与桩端阻力共同承担,在试验中选取的灌注桩承载力均可满足相关要求。In this paper,taking a high-rise building project as an example,the bearing capacity test of large-diameter cast-in-place pile is carried out to ensure that the high-rise building has better stability.This study relies on the overload reaction system to gradually apply static load to pile failure through jacks,after each stage of loading is completed,the calculated deformation of pile is measured at 5 min,10 min and 15 min respectively,and the results are recorded and analyzed.The results show that the ultimate bearing capacity of the five piles is different,the maximum load value is up to 15000 kN,while the minimum load value is 750 kN.The bearing capacity of large-diameter cast-in-situ piles is borne by both side resistance and end resistance,and the bearing capacity of cast-in-situ piles selected in the test can meet the relevant requirements.

关 键 词：高层建筑 大直径灌注桩 承载力试验 荷载沉降 

分 类 号：TU473.14[建筑科学—结构工程]