PURPOSES : In this study, an empirical approach was established to estimate the parameters of the resilient modulus based on various geotechnical properties of subgrade soils. METHODS : Multiple regression analyses were performed to analyze the relationship between resilient modulus (k1) and deformation. The most important factors are the #200 sieve passing ratio, moisture content, and dry unit weight of the soil. The applicability of this approach was verified using selected field data and the literature. RESULTS : The correlation between the results predicted using the prediction equation of the model constant (k1) and the actual k1-value was high. The applicability of the prediction equation was considered high owing to its high suitability with the existing data. The range of values obtained using the constant prediction equation of the proposed model was also judged to be reasonable. In the comparison of the CBR value of the subgrade material of the actual design section and the predicted elastic modulus (k1), almost no relationship was observed between the CBR and the model coefficient (k1). Thus, the estimation of the elastic modulus through CBR is likely to contain errors. CONCLUSIONS : Based on these results, the parameters of the universal model can be predicted using the stress-dependent modulus model proposed in this study.

1. 서론
2. 노상토의 응력의존 특성
3. 회복탄성계수 예측모델 수립
4. 예측식을 활용한 탄성계수 추정
5. 설계 CBR 값과 비교분석
6. 결론
REFERENCES

• 황규영((주)건화, 공학박사) | Hwang Kyu-Young
• 김병수(단국대학교 공과대학 토목환경공학과 부교수) | Kim Byeong-Su
• 박성완(단국대학교 공과대학 토목환경공학과 교수) | Park Seong-Wan (Professor Dept. of Civil & Environment Engineering, Dankook Univ., 152 Juckjeon-ro, Young-In 16890, Korea) Corresponding author