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Título

Quake Values Over Time Determined By The High Strain Dynamic Pile Test

Palavras-chave

Quake, Set-Up, High Strain Dynamic Pile Test, Wave Up, Match Quality of Settlements, CAPWAP

Resumo (no máximo 200 palavras)

The Pile Driving Analyzer (PDA) collects force and velocity signals from a pair of sensors attached to the pile. The signal-matching analysis is performed based on these collected signals to predict the pile capacity, damping, and quake values. Further, CAPWAP is a software commonly used for this purpose. Then, it provides a simulated load vs. settlement curve based on the soil parameters used in the analysis. However, some authors have observed that the soil parameters changes along the pile installation, and they change over time. As a consequence, the load vs. settlement curves may change with time. Moreover, the procedure proposed by (Murakami, 2015) may identify soils with large toe quakes (Qt) based on the Wave Up Curve, while the shaft quake (Qs) may be determined through the Concept of Match Quality of Settlements (Murakami, 2015, 2019). This paper shows three case studies in which the High Strain Dynamic Pile Test (HSDP) was performed during the end of initial driving (EOID) and at the beginning of restrike (BOR). The case studies show that the pile settlements reduce over time for the same load applied to the pile top due to soil set-up and toe quake reduction over time.

Palavras Chave

CAPWAP; High Strain Dynamic Pile Test; Match Quality of Settlements; Quake; Set-Up; Wave Up

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