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高应变曲线拟合分析方法的探析

发表时间:2020-07-01  浏览量:123  下载量:17
全部作者: 宝鹏辉,杜思义
作者单位: 徐辉设计股份有限公司;郑州大学土木工程学院
摘 要: 高应变法是检测基桩承载力唯一的动测方法,改善高应变曲线拟合法的拟合质量是提高高应变结果精度的关键环节。本文统计分析国内基桩承载力动静对比的结果,得出灌注桩、预制桩高应变曲线拟合分析方法的参数变化范围,在此基础上再进行桩端阻尼模型的优化分析,以提高高应变分析结果的精度。结果表明:对于灌注桩,采用桩端黏滞阻尼模型求出的承载力与静载试验结果的误差最小,且最大误差不超过10.0%. 对于预制管桩,采用桩端Smith阻尼模型求出的承载力与静载试验结果的误差最小,且最大误差不超过9.0%,这使高应变曲线拟合分析方法的精度提高了10%.
关 键 词: 土木建筑工程施工;高应变曲线拟合法;桩端阻尼模型;灌注桩;精度;预制桩
Title: Exploration of high strain curve fitting analysis method
Author: BAO Penghui, DU Siyi
Organization: Xuhui Design Co., Ltd.; School of Civil Engineering, Zhengzhou University
Abstract: High strain method is the only dynamic test method for detecting the bearing capacity of piles. Improving the fitting quality of the high strain curve fitting method is the key to improving the accuracy of high strain results. In this paper, the dynamic and static comparison results of domestic pile bearing capacity are statistically analyzed, and the parameter variation range of the high strain curve fitting analysis method of cast-in-place pile and precast pile is obtained. On this basis, the optimization analysis of the pile-end damping model is carried out to improve the accuracy of the high strain analysis results. The results show that for the cast-in-place piles, the error of the bearing capacity and static load test result obtained by the pile-end viscous damping model is the smallest, and the maximum error does not exceed 10.0%. For the precast piles, the error between the bearing capacity and the static load test result obtained by the pile-end Smith damping model is the smallest, and the maximum error does not exceed 9.0%, which increases the accuracy of the high strain curve fitting analysis method by 10%.
Key words: civil and architectural engineering construction; high strain curve fitting method; pile-end damping model; cast-in-place pile; precision; precast pile
发表期数: 2020年6月第2期
引用格式: 宝鹏辉,杜思义. 高应变曲线拟合分析方法的探析[J]. 中国科技论文在线精品论文,2020,13(2):196-203.
 
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