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Pull-out Resistance Characteristics of the Anchor Bar According to the Grouting Material  

Yea, Geu-Guwen (R&D Division, Sambu Construction Co., Ltd.)
Song, Young-Suk (Geological & Environmental Hazards Division, Korea Inst. Geoscience and Mineral Res.)
Publication Information
The Journal of Engineering Geology / v.18, no.2, 2008 , pp. 227-232 More about this Journal
Abstract
In this study, the pull out resistance characteristics of an anchor bar to support a spillway installed in a slope are investigated by field tests. The injection materials were a cement mortar and cement milk. Unconfined compression strengths of those materials under several conditions were measured. As the result of compression test, the unconfined compression strengths of the cement mortar and the cement milk have positive proportional relation-ship with the water-cement ratio. They also have negative proportional relationship with increasing the curing time. In the same condition of water-cement ratio and curing time, the unconfined compression strength of cement milk is larger than that of cement mortar. In order to reduce the eccentricity in anchor bar during pull-out test in the field, the installation apparatus was improved by inserting a nut type of steel fixing coupling into the anchor bar. As the result of the pull-out test, the strength modification of cement milk was increased steeply at the early curing time. However, that of cement mortar was increased gradually with passing the curing time. Therefore, the cement milk has to use as the injection material for a prompt construction of anchor bar because the strength modification of cement milk is occurred at the early curing time.
Keywords
anchor bar; injection material; cement mortar; cement milk; pull out strength;
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1 신방웅, 이봉직, 오세웅, 이종규, 1998, 지반특성에 따른 헬리컬 앵커의 극한인발력에 관한 연구, 대한토목학회논문집, 제18권 제III-6호, pp.911-920
2 유성원, 정상화, 곽기석, 이주형, 2006, 부착식 앵커의 인 발특성에 관한 실험적 연구, 대한토목학회논문집, 제26권 제3A호, pp.555-563
3 장정범, 서용표, 이종림, 2003, 직매형 앵커기초의 설계 기준 개선에 관한 연구, 대한토목학회논문집, 제23권 제6A호, pp.1331-1338
4 Hong, W. P., Im, S. B. and Kim, H. T., 1993 Treatment of Groundwater in Excavation Works dor the Subway Construction, Proc. of 11th Southeast Asian Geotechnical Conference, Singapore, pp.369-373
5 임종철, 홍석우, 이태형, 이외득, 1998, 압축형 앵커(SSC 앵커)의 인발저항 기구, 대한토목학회논문집, 제18권 제III-6호, pp.883-898
6 장정범, 서용표, 이종림, 2004, 균열을 고려한 직매형 앵 커기초의 콘크리트 파괴강도 평가에 관한 연구, 대한토목학회논문집, 제24권 제3A호, pp.647-652
7 여규권, 한상현, 이재호, 2007, 콘크리트 표면 차수벽형 석괴댐의 Zone-1재료에 대한 다짐 특성, 한국토목섬유학회논문집, 제6권 제2호, pp.9-15
8 홍원표, 송영석, 고광태, 2002, 부력저항용 영구앵커의 거 동, 중앙대학교 기술과학연구소 논문집, 제32집, pp.1-11