지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2013.4
- 수록면
- 59 - 62 (4page)
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초록· 키워드
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This paper presents a case study of pack-micropile application for seismic retrofit project of old elementary school building. The method of structural mitigation for seismic reinforcement was investigated and, as a result, displacement amplification damper system and shear wall were designed to install for the building. These structural reinforcement requires additional bearing capacity of foundation. Correspondingly, 28 pack-micropiles were additionally installed at the bottom of shear wall and dampers. The pack-micropile provides a specific way to grout bore-hole to increase frictional resistance between surrounding soil and pile-structure. In order to increase such resistance woven geotextile is wrapped to the reinforcement steel pipe for pressure grouting. Grouting materials are mainly injected in two steps: (1) gravity-type grouting inside drilling steel-casing and (2) pressurized grouting into the geotextile pack after inserting reinforcement and removing the drilling steel-casing. The second step builds a tight interface between surrounding ground and pile-structure and provides higher frictional bearing resistance. The tensile proof load tests were performed for the installed pack-micropiles according to the FHWA guideline. Test result showed that the measured ultimate load capacity satisfies the design capacity.
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UCI(KEPA) : I410-ECN-0101-2014-530-003560781