Predicting driving transferred energy without needing the hammer efficiency: three case studies

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2023-05-19 DOI:10.28927/sr.2023.000223

André Querelli, T. Souza

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Abstract

This study presents case studies on the implementation of an innovative method of calculating effective driving energy with no need to account for hammer efficiency. The approach is based on measurements of set and elastic rebound, as well as a site-specific parameter (λ) calibration. The study applied this method to steel piles located in the cities of Santos (SP), Itaguaí (RJ), and Óbidos (PA), with the latter site being built in the Amazon region, near the Amazon River. Following coefficient calibration, the effective driving energy estimation technique exhibited a strong correlation with realistic and accurate energies directly obtained from dynamic loading tests. The method provides a highly accurate means of calculating effectively transferred energy to piles due to hammer blows, without relying on knowledge of the driving system performance. In that way, it can be applied to all the piles at the site (100% of them), including those that are not tested. This optimized and agile approach represents a significant breakthrough in foundation engineering and an enhance of pile foundation quality control.

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预测无需锤效率的驱动传递能量：三个案例研究

本研究提供了一种不需要考虑锤效率的计算有效驱动能量的创新方法的实施案例研究。该方法基于凝固和弹性回弹的测量，以及特定场地的参数（λ）校准。该研究将该方法应用于桑托斯（SP）、伊塔瓜伊（RJ）和奥比多斯（PA）等城市的钢桩，后者位于亚马逊河附近的亚马逊河地区。在系数校准之后，有效的驱动能量估计技术与直接从动态负载测试中获得的真实准确的能量表现出很强的相关性。该方法提供了一种高度准确的方法来计算由于锤击而有效传递到桩上的能量，而不依赖于打桩系统性能的知识。这样，它可以应用于现场的所有桩（100%），包括未经测试的桩。这种优化和敏捷的方法代表着基础工程的重大突破和桩基质量控制的加强。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.