| Title |
Evaluation of Degree of Compaction of Embankment Soil Using Elastic Modulus and Impact Acceleration |
| Authors |
채규종(Chae, Gyu Jong) ; 정민주(Jeong, Min Ju) ; 오현주(Oh, Hyun Ju) ; 박형춘(Park, Hyung Choon) |
| DOI |
https://doi.org/10.12652/ksce.2026.46.5.0449 |
| Keywords |
다짐도 평가; 탄성계수; 충격가속도; 비파괴시험; 지오게이지; 간이지지력시험 Compaction quality; Elastic Modulus (Eg); Impact factor (Ia); Nondestructive testing; Geogauge; Portable bearing test (CASPFOL) |
| Abstract |
Compaction quality control of embankment soils in Korea is mainly conducted using the field density test (KS F 2311) and plate bearing test (KS F 2310). However, these methods have limitations in providing rapid quality control because of constraints related to test procedures and equipment operation. This study evaluated the degree of compaction of embankment soils using two nondestructive testing methods: the elastic modulus (Eg) measurement using a GeoGauge and the impact factor (Ia) measurement using CASPFOL, and examined their field applicability by comparison with conventional tests. Tests were conducted at the Dongtan model test site, the Sejong 5-1 Residential Area field verification site, and a homogeneous ground test site with a uniform particle-size distribution. In the model tests, Eg and Ia generally increased with the number of compaction passes, reflecting changes in the compaction state of the ground. In the field verification tests, Eg showed a relatively high correlation with relative compaction and stable measurements even in heterogeneous embankment materials. In contrast, Ia was strongly affected by particle-size distribution and showed large variability in heterogeneous ground. In the homogeneous ground tests, the variability of repeated measurements decreased for both Eg and Ia, with Ia showing particularly stable results. These results indicate that Eg can complement conventional compaction evaluation tests as a rapid quality-control method, whereas Ia can provide more reliable compaction evaluation in ground with a uniform particle-size distribution, such as dredged fills. |