BS EN ISO 22477-4:2018规定了执行动态荷载试验的规范，其中 桩在压缩过程中承受轴向动荷载。本文件概述了评估桩阻力所需的测试方法 根据EN 1997-1:2004+A1:2013:a）动态冲击试验中描述的以下方法和程序确定——通过评估 测量桩头处的应变、加速度和/或位移随时间的变化；b） 打桩公式.通过锤击计数和锤击评估桩抗压强度 打桩过程中的能量； c） 波动方程分析.通过建模从锤击数评估桩抗压强度 桩、土壤和打桩设备的安装；d） 多次冲击动态试验.从一系列冲击中评估桩抗压强度 设计用于产生不同水平的桩头位移和速度。本文件适用于轴向受压的桩。本文件适用于EN 1536、EN 12699和EN 14199中提到的所有桩型。本文件中考虑的试验仅限于桩的动荷载试验。交叉引用:NA+A1:2014至BS EN 1997-1:2004+A1:2013EN 1536EN 12699EN 14199EN 16228购买本文件时可获得的所有现行修订均包含在购买本文件中。

BS EN ISO 22477-4:2018 establishes the specifications for the execution of dynamic load tests in which a single pile is subject to an axial dynamic load in compression.This document outlines the methods of testing required to allow assessment of pile resistance to be determined from the following methods and procedures described in EN 1997-1: 2004+A1: 2013:a) dynamic impact testing - determination of pile compressive resistance by evaluation of measurements of strain and acceleration and or displacement at the pile head with respect to time;b) pile driving formulae - evaluation of pile compressive resistance from blow counts and hammer energy during pile driving;c) wave equation analysis - evaluation of pile compressive resistance from blow counts by modelling of the pile, soil and driving equipment;d) multi-blow dynamic testing - evaluation of pile compressive resistance from a series of blows designed to generate different levels of pile head displacement and velocity.This document is applicable to piles loaded axially in compression.This document is applicable to all pile types mentioned in EN 1536, EN 12699 and EN 14199.The tests considered in this document are limited to dynamic load tests on piles only.Cross References:NA+A1:2014 to BS EN 1997-1:2004+A1:2013EN 1536EN 12699EN 14199EN 16228All current amendments available at time of purchase are included with the purchase of this document.