Field Evaluations of Intelligent Compaction Measurement Values for Quality Control of Trackbed Compaction

Q: What does this research mean for the field?

The calculation of Compaction Meter Value (CMV) for trackbed compaction quality control is highly sensitive to sensor attachment location, roller speed, and data processing methods, with drum-axis sensors and low-speed operation providing more accurate reflections of ground response compared to traditional single-point tests. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

Hyeonwoo Yu; Min-Suk Kim; Jeongho Oh; Kyeong-Ho Kim; Kyu-Sun Kim

doi:10.7782/jksr.2026.29.8.749

August 31, 2026Journal of the Korean society for railway

Field Evaluations of Intelligent Compaction Measurement Values for Quality Control of Trackbed Compaction

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Key Points

To investigate the effects of accelerometer specifications, sensor placement, roller travel speed, and signal processing methods on Compaction Meter Value (CMV) calculation during railway trackbed compaction.
Conducted field trials on a railway trackbed using a 10-ton vibratory roller equipped with accelerometers at both the drum center axle and the outer chassis frame.
Evaluated roller travel speeds of 2 km/h versus 5 km/h, sampling rates exceeding 200 Hz, and standard deviation-based signal filtering techniques.
Compared continuous CMV calculations to spot-testing benchmarks, including Plate Load Test (PLT), Light Weight Deflectometer (LWD), Soil Stiffness Gauge (SSG), and sand cone field density tests.
CMV measured at the drum axle was on average 38.1% higher than at the outer frame and more accurately mirrored soil response changes across compaction passes compared to conventional spot tests.
CMV increased by 44.6% across passes at a travel speed of 2 km/h compared to 38.8% at 5 km/h, demonstrating greater measurement sensitivity at lower speeds.
Applying standard deviation-based data filtering reduced the CMV coefficient of variation from 25.5% to below 19.7%, while a sampling rate of at least 200 Hz ensured calculation stability.

Implication

Field experiment reveals sensor placement and roller speed significantly alter compaction meter values in railway trackbeds, highlighting the need for standardized data protocols.

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Cite This Study

Yu et al. (2026) studied this question.

synapsesocial.com/papers/6a97e237c562ede874ec6343 https://doi.org/10.7782/jksr.2026.29.8.749

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Field Evaluations of Intelligent Compaction Measurement Values for Quality Control of Trackbed Compaction

Key Points

Implication

Abstract

Discussion

Cite This Study

Field Evaluations of Intelligent Compaction Measurement Values for Quality Control of Trackbed Compaction

Key Points

Implication

Abstract

Discussion

Cite This Study

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