When we excavate an underground to build basement, the ground anchors are needed to prevent collapse of neighboring ground, subsidence and movement. Ground anchor construction required shore sheet piles, wales and struts as to maintain secure excavation. Existing box-type bracket using head part of ground anchor can not be possibly adjustable to the boring angle because the brackets are manufactured with unified angle in a factory. Also, box-type brackets have imperfection and instability caused by inequable force. In this study, a new bracket system is proposed. The bracket's side plate is reinforced and the angle of boring can be controlled. To investigate the structural performance of presented brackets, FEM analysis has been performed by using ANSYS commercial program. As a result, this bracket shows sufficient stability for all angle case and the strength is increased about 24% than existing bracket.

 Abstract  1. 서 론  2. 제품의 형상과 해석 계획   2.1 제품의 형상   2.2 해석 계획   2.3 해석과 재료 물성  3. 해석 결과   3.1 최대 내력 평가   3.2 보강요소(겹판, 눈썹판)의 효과 분석   3.3 편심하중의 작용에 대한 비교  4. 결론  감사의 글  References

• 김재열(협성대학교 건축공학과 교수, 공학박사) | Kim, Jae-Yeol
• 김영호( (주)지승컨설턴트 전무이사, 공학박사) | 김영호