桩基动态检测的相关分析法

Correlation Analysis Method of Pile Dynamic Test

本文首次应用“相关分析技术”提出了一套简单、实用、可靠的桩基动态检测新方法。采用单桩激振,多桩响应拾取振动信号;实测桩身应力波波速;根据边界条件系数确定桩长;应用相关分析。谱分析及故障诊断技术判断桩身的完整性,并在上述试验,分析的基础上对桩基础进行分类。进行桩基的动静载荷试验时比,确定动、静相关系数,准确可靠地推算单桩坚向承载力标准值。在检测20％～30％桩的基础上,应用可靠度对现场桩基础做出综合评价,提高了桩基检测的整体可靠性。

In this paper, first applied“correlation analysis technique”, then advanced a simple, practical reliable new method of pile dynemic test. Adopting majority pile responded to the simple pile excitment for picking up vibration signal, To measure pile stress wave propagation velocity practiallyisto determine pile length according to boundary condition coefficient. Applying correlation analysis, spectral analysis and fault diagnosis technique, the judgement of completeness of piles is presented, puttiong the classification of pile based on above mentioned and giving analysis. The contrast tests of dyna-mic load and static load of piles is provided. The correlation coefficient of dynamic load test and static load test are determined. The standard value of simple pile vertical bearing capaity is exactly reliably determined. Based on test of 20-30% piles, appling reliability to making up synthesized appraise for existing piles, the whole reliability of pile test is increased.