基于现场载荷试验的单桩沉降简化计算
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。
Abstract: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.
中文标题：
基于现场载荷试验的单桩沉降简化计算
A Simple Settlement Calculation of Single Pile Based on Field Load Test
作者：
梁金国1,丁继辉2,刘红超1
Liang Jinguo1,Ding Jihui2,Liu Hongchao1
作者简介:梁金国,男,1956年生,汉族,河北临西人,硕士研究生导师,教授级高级工程师,现从事岩土工程专业。E-mail:ljg_hb@sina.com
通讯地址：
1. 河北建设勘察研究院有限公司, 河北石家庄 050031; 2. 河北大学建筑工程学院, 河北保定 071001
1.Ltd.ofResearchInstituteofConstructin&InvestigationofHebei,Shijiazhuang050031,Hebei,China; 2.CollegeofCivilEngineeringandArchitectureofHebeiUniversity,Baoding071001,Hebei,China
中图分类号:TU473.12
doi:10.3969/j.issn.1007-2993.2016.04.012
出版物：岩土工程技术
收稿日期:2016-04-18
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
Key words:field loading tests,distribution function for axial force,load transmission function,settlement value of the single pile
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