Database Evaluation of Energy Transfer for Central Mine Equipment Automatic Hammer Standard Penetration Tests

Honeycutt, Jonathan N.; Kiser, Steven E.; Anderson, Jason M.

doi:10.1061/(asce)gt.1943-5606.0000988

Cited by 7 publications

(2 citation statements)

References 6 publications

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“…Tetapi untuk investigasi kecil, korelasi empiris mungkin menjadi satu-satunya cara menggunakan data SPT untuk menilai kekuatan [22]. Selama bertahun-tahun, penggunaan luas SPT telah menyebabkan banyak korelasi empiris yang diterbitkan terkait nilai resistansi penetrasi-tanah N ke berbagai sifat rekayasa tanah [23].…”

Section: Standard Penetration Test (Spt)unclassified

Perbandingan Daya Dukung Tiang Pancang Berdasarkan Pengujian Cone Penetration Test (Cpt) Dan Standard Penetration Test (Spt) Pada Tanah Berpasir

Basoka

2020

UKaRsT

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Design of building structure always related to the foundation, field testing is often done to test the bearing capacity of the soil in the form of a cone penetration test (CPT) and a standard penetration test (SPT). From the two field tests that are often done, it is necessary to research the amount of bearing capacity obtained through CPT and SPT data. This study uses a bearing capacity analysis of the pile foundation using CPT and SPT data in Pesanggaran, Bali, Indonesia. The analysis was carried out by comparing the bearing capacity of pile foundations using pile foundations with dimensions of 15 cm, 20 cm, 25 cm and 30 cm at a level of 10 meters. The results of the bearing capacity percentage are then compared. From the analysis conducted, the bearing capacity of pile foundations using CPT data has a higher value than the carrying capacity of poles using SPT data with a bearing capacity difference of 10,4-16,3%.Perancangan suatu struktur erat kaitannya dengan fondasi, pengujian lapangan yang sering dilakukan untuk mengetahui daya dukung fondasi berupa cone penetration test (CPT) dan standard penetration test (SPT). Dari dua pengujian lapangan yang sering dilakukan, maka perlu dilakukan dilakukan penelitian mengenai seberapa besar perbedaan hasil daya dukung yang diperoleh melalui data CPT dan SPT. Penelitian ini melakukan perbandingan analisis daya dukung fondasi tiang dengan menggunakan data CPT dan SPT di Pesanggaran, Bali, Indonesia. Analisis dilakukan dengan membandingkan daya dukung fondasi tiang menggunakan fondasi tiang berdimensi 15 cm, 20 cm, 25 cm, dan 30 cm pada kedalaman 10 meter. Hasil persentase daya dukung yang diperoleh kemudian dibandingkan. Dari analisis yang dilakukan, diperoleh daya dukung fondasi tiang menggunakan data CPT memiliki nilai lebih tinggi daripada daya dukung tiang menggunakan data SPT dengan perbedaan daya dukung 10,4-16,3%.

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Section: Standard Penetration Test (Spt)unclassified

Perbandingan Daya Dukung Tiang Pancang Berdasarkan Pengujian Cone Penetration Test (Cpt) Dan Standard Penetration Test (Spt) Pada Tanah Berpasir

Basoka

2020

UKaRsT

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“…The primary difference between Chinese and U.S. drop hammer systems is the difference in hammer mass, which also affects the stress wave propagation and energy transfer [14]. In recent years, scholars have performed field measurements and analyses on the transmission efficiency in the hammer energy of standard penetration tests [15][16][17][18], but there is little research on this topic in China.…”

Section: Introductionmentioning

confidence: 99%

Energy Measurement in Standard Penetration Tests

Yang

Zhang³

et al. 2023

Sustainability

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The standard penetration test (SPT) is a widely used in situ test method worldwide that can evaluate soil properties based on the blow counts (N-value). The N-value depends on soil properties, and the energy transferred to the drill pipe during hammering. Currently, European and American scholars generally believe that variation in the amount of hammer energy transmitted to the drill pipe due to different types of drop hammer systems is the primary factor that leads to variations in N-value. In China, there is a lack of research on the quantitative energy transfer efficiency of the drop hammer system based on test data from a penetration test instrument. In this study, an in-situ test in Jiangsu Province was performed at a test site using standard penetration test instruments that are commonly used in China. Corresponding time history curves and strain, acceleration, force, velocity, energy and penetration degree data were obtained through the stress wave test. The propagation law of the stress wave and energy in a drill pipe was analyzed, and the energy transfer efficiency of the domestic SPT system was measured. In the stress wave test, most of the measured hammer energy efficiency was between 74.5 and 84.5%, and the measured average energy was 0.3723 kJ; the average energy efficiency was 78.7%; the standard deviation (SD) of the energy efficiency was 3.82, and the coefficient of variation (CV) of energy transfer efficiency(ER) was 4.9%. The average energy efficiency of 78.7% can be considered to be the energy efficiency of the domestic SPT system. The calculated results reported in this article can be used to improve the quantitative level of domestic investigation. Based on the calculated Er, the results obtained from different SPT systems at home and abroad can be corrected.

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