PURPOSES : In this study, the amount of core stone breaking in the size of boulders by excavator braker work was analyzed quantitatively through on-site test construction. In addition, the factors affecting workload were studied.
METHODS : In the field test, 30 core stones of boulder sizes (1–4 m3) that appeared during earthworks, such as road construction and site construction, were collected from three locations, and the rock breaking work was carried out simultaneously using three excavator breakers(1.0-m3 volume). During the core stone breaking, progress was analyzed through video recordings. RESULTS : After the completion of rock breaking, the amount of breaking work was analyzed by direct loading and weighing using a 15- ton dump truck. As a result of the test construction, there was a significant difference in the amount of work completed per hour.
CONCLUSIONS : It was found that the results were greatly affected by not only the performance of the excavator braker equipment, but also the skill of the driver and the size of the core stones.

ABSTRACT
1. 서론
2. 현장 시험시공
    2.1. 현장 개요
    2.2. 전석크기 핵석 시료준비
    2.3. 굴삭기 브레이크 장비
    2.4. 핵석 소할 작업
    2.5. 소할작업 조사
3. 현장 시험시공 결과분석
    3.1. 암석 소할 작업시간
    3.2. 암석 소할 작업량 분석
    3.3. 4m3 이상 크기의 핵석 소할작업량 분석
    3.4. 굴삭기 브레이크 장비의 영향
    3.5. 현장에서 측정한 전체부피 산정
4. 결론
REFERENCES

• 정연득(경상국립대학교 건설시스템공학과 박사과정) | Jung Youn-Dug
• 김무열(경남개발공사 양산가산사업소 소장) | Kim Mu-Yeol
• 김동효(경남개발공사 양산가산사업소 차장) | Kim Dong-Hyo
• 하만복(경상국립대학교 건설시스템공학과 박사) | Ha Man-Bok
• 문홍득(경상국립대학교 건설시스템공학과 교수) | Moon Hong-Duk Corresponding Author