摘要
基于桩在竖向荷载作用下的桩轴力分布函数,分析了钻孔灌注桩在竖向荷载作用下的承载特性、桩身荷载传递规律、桩的截面轴力分布规律和桩侧阻力分布规律,其计算结果与实测结果较为一致。从单桩Q-s曲线入手,确定各级荷载下桩端平面以下地基土的变形特性曲线,利用该变形曲线可以方便地计算单桩沉降量,其计算结果与实测的单桩载荷试验曲线一致。利用轴力分布函数计算各级荷载下的桩身压缩量和桩端沉降量,进而获得单桩沉降量,其计算结果与按现场测试的轴力分布和侧阻力分布计算的单桩沉降量规律一致,计算结果偏小,能够满足工程要求。
Based on the distribution of pile＇s axial force under vertical loads, this paper analyzes the bored plie＇s bearing characteristic/the load transfer law along the pile body/the distribution of axial force for pile section/the distribution of the side pile resistance under vertical loads, and the calculation results are consistent with the measured results. Starting from the Q-s curve of single pile to determine the soil deformation curve below the pile end plane under various stepwise loadings, then using the deformation curve can easily calculate the single pile settlement, and the calculation results are consistent with the measured results of single pile load test. Using the distribution function for axial force to calculated the compression of pile body and the settlement of the pile toe, then we will calculate the settlement of single pile, the results are consistent with the results by using the field test data to calculate, and the results are smaller and they may satisfy the engineering demand.
作者
梁金国
丁继辉
刘红超
Liang Jinguo Ding Jihui Liu Hongchao(Ltd. of Research Institute of Constructin ＆ Investigation of Hebei, Shijiazhuang 050031, Hebei,China College of Civil Engineering and Architecture of Hebei University, Baoding 071001, Hebei,China)
出处
《岩土工程技术》
2016年第4期212-216,F0003,共6页
Geotechnical Engineering Technique
关键词
现场载荷试验
轴力分布函数
荷载传递规律
单桩沉降量
field loading tests
distribution function for axial force
load transmission function
settlement value of thesingle pile
