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Título

A Comparison Between Static and Dynamic Load Tests Results in a 29.5 cm-Square Precast Concrete Pile

Palavras-chave

Static Load Test, Dynamic Load Test, Precast Concrete Piles, Match Quality of Settlements, Soft Soil, Modified Davisson Offset

Resumo (no máximo 200 palavras)

The concept of Match Quality of Settlements (Murakami 2015, 2019) to correlate static and dynamic load tests has been used in different pile types, presenting some advantages compared to the traditional method to correlate both tests. This paper shows a case study in which 29.5 cm-square precast concrete piles were driven through a soft soil layer (32m depth), followed by a sandy soil where the pile toes were embedded (36m depth). The designed load was 110 tons. Furthermore, the static load test (pile ET01) was performed to reach the ultimate load through the slow maintained load, followed by the quick test. However, due to safety conditions, the load test was unloaded, and the next day the load test was performed through the quick test and reached 242 tons. The pile broke when the load test reached the maximum load. The dynamic test (pile E220) reached 250 tons. The ultimate load was not observed in both tests, and the Modified Davisson proposed by Murakami (2015) was used to compare the tests. Furthermore, the R2 and the alpha values of the Match Quality of Settlements were close to the unit, indicating a good correlation between both tests.

Palavras Chave

Dynamic Load Test; Match Quality of Settlements; Modified Davisson Offset; Precast Concrete Piles; Soft Soil; Static Load Test

Arquivos

Área

Ensaios de Campo: provas de cargas prévias e de desempenho