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논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 채영수
- 발행연도
- 2016
- 저작권
- 수원대학교 논문은 저작권에 의해 보호받습니다.
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This study was conducted to investigate the applicability of load- distributive type tension anchor using laboratory test and in-situ test in the same condition as that of actual site in oder to offer a possibility of more actively utilizing a ground anchor in soft ground by using post-grouting method onto load-distributive type tension anchor.
And load distribution and behavior characteristics were checked by comparing and analyzing the performance of load-distributive type compression anchor and load-distributive type tension anchor through numerical analysis. The purpose of this study is to carry out a study on suitable spacing between anchor bodies in load-distributive type tension anchor and then to provide this as baseline data for application to design.
According to the results of verification through laboratory and in-situ test and numerical analysis, in case of the anchor applied to soft ground, the load transfer of load-distributive type tension anchor was done through each bare strands of the whole bonded length and the eccentricity could be minimized.
Therefore, it is thought that applicability is relatively better. It was possible to ensure enough pullout resistance even in bonded length of 10m or above in case of distributively arranging the bonded length and additionally adopting the post-grouting when the efficiency of bonded length was considered. In case of applying the load-distributive type tension anchor to which the post-grouting was applied, the grout bulb of the bonded length expanded. So, it was possible to improve pullout resistance.
Accordingly, a possibility of replacing a conventional packer anchor was sufficiently implied. It is thought that, with regard to post-grouting method, a study will be needed through consideration of more variables in the future. And additionally, it is planned to conduct a test for obtaining quantitative data according to respective variables such as point in time of injection, target injection pressure, the number of grouting repetitions, the number of used grouting hoses, and the amount of input cement in consideration of various conditions such as soil type, bonded length and target anchor load.
And load distribution and behavior characteristics were checked by comparing and analyzing the performance of load-distributive type compression anchor and load-distributive type tension anchor through numerical analysis. The purpose of this study is to carry out a study on suitable spacing between anchor bodies in load-distributive type tension anchor and then to provide this as baseline data for application to design.
According to the results of verification through laboratory and in-situ test and numerical analysis, in case of the anchor applied to soft ground, the load transfer of load-distributive type tension anchor was done through each bare strands of the whole bonded length and the eccentricity could be minimized.
Therefore, it is thought that applicability is relatively better. It was possible to ensure enough pullout resistance even in bonded length of 10m or above in case of distributively arranging the bonded length and additionally adopting the post-grouting when the efficiency of bonded length was considered. In case of applying the load-distributive type tension anchor to which the post-grouting was applied, the grout bulb of the bonded length expanded. So, it was possible to improve pullout resistance.
Accordingly, a possibility of replacing a conventional packer anchor was sufficiently implied. It is thought that, with regard to post-grouting method, a study will be needed through consideration of more variables in the future. And additionally, it is planned to conduct a test for obtaining quantitative data according to respective variables such as point in time of injection, target injection pressure, the number of grouting repetitions, the number of used grouting hoses, and the amount of input cement in consideration of various conditions such as soil type, bonded length and target anchor load.
목차
- 목 차 ⅰ표 목 차 ⅳ그림목차 ⅵ제 1장 서 론 11.1 연구배경 및 목적 11.2 연구동향 21.3 연구내용 및 방법 8제 2장 이론적 배경 102.1 앵커공법 102.1.1 앵커의 개요 102.1.2 앵커의 구조 102.1.3 앵커의 분류 112.2 앵커의 설계 192.2.1 앵커의 설계개요 192.2.2 앵커의 자유장과 정착장의 설계 192.2.3 앵커의 극한 인발력 242.2.4 앵커의 극한 인장력 272.2.5 안전율 및 허용 앵커력 272.2.6 앵커 인장력의 손실 282.3 앵커의 시험 292.3.1 인발시험 292.3.2 인장시험 302.3.3 확인시험 312.3.4 크리프 시험 322.3.5 시험 방법-AASHTO 322.4 연약지반 앵커의 시공 352.4.1 연약지반 앵커의 거동특성 352.4.2 연약지반 앵커공법의 종류와 문제점 402.4.3 인장형 하중분산 앵커의 연약지반 적용성 47제 3장 Post-grouting을 도입한 인장형 하중분산 앵커의 실내 및 현장시험 543.1 개요 543.2 Post-grouting 공법 543.3 실내 구근 확인 시험 573.3.1 개요 573.3.2 사용재료 및 시험방법 573.3.3 시험 순서 583.3.4 시험 결과 603.4 현장 구근 확인 시험 613.4.1 개요 613.4.2 시험 앵커 구성재료 613.4.3 시험 앵커 사양 623.4.4 Post-grouting 주입 방법 653.4.5 시험 순서 663.4.6 시험 결과 683.5 앵커의 성능비교 분석 703.5.1 개요 703.5.2 시험 앵커의 사양 및 시공순서 703.5.3 극한 인발력 시험 723.5.4 허용 주면 마찰 저항치의 산정결과 833.5.5 앵커의 성능 비교 분석 843.6 앵커의 실내시험 및 현장시험 결과 분석 85제 4장 수치해석적 거동평가 874.1 개요 874.2 해석 방법 및 조건 884.2.1 앵커의 모델링 884.2.2 해석 적용한 앵커체 물성치 및 지반정수 944.3 인장형 하중분산 앵커의 수치해석 결과 964.3.1 Normal-grouting과 post-grouting 앵커의 거동분석 964.3.2 내하체 간격과 정착장에 따른 해석 결과 1004.4 수치해석 결과분석 102제 5장 결 론 104참고문헌 106Abstract 110부록 112
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