What question did this study set out to answer?

This research aimed to analyze the physical and mechanical properties of a burial mound affected by an earthquake.

March 25, 2026Open Access

Geotechnical investigations in earthquake-damaged burial mounds toward restoration

Key Points

This research aimed to analyze the physical and mechanical properties of a burial mound affected by an earthquake.
Excavation of the damaged part of the Sakuradani Tumulus
Measurement of density using the radioisotope method
Assessment of strength through needle penetration
Comparison with laboratory compaction test results
Intact upper terrace showed greater dry density and strength than the lower terrace.
The lower terrace's properties were likely due to collapse from the upper part.
Dry density in the intact zone was 20 to 40% of Standard Proctor, indicating low compaction.
Overall, the mound's construction lacked adequate compaction, affecting its seismic resistance.

Abstract

This study reports the physical and mechanical properties of the Sakuradani Tumulus damaged by the 2024 Noto Peninsula Earthquake. The damaged part of the burial mound was excavated, and density and strength were measured with the radioisotope method and needle penetration, respectively. The results showed that the upper terrace of the intact original layer had larger dry density and strength than those of the lower terrace, which is thought to be formed due to the collapse of the upper part. Compared with laboratory compaction test results, however, even the dry density of the intact zone was smaller than that achieved with manual compaction energy (i.e. 20 to 40% of Standard Proctor), which indicates that the mound was developed by piling up soil layers without compaction and had small seismic resistance.

Demander à l'IA

Bookmark

View Full Paper