하중 분산형 앵커 내하체에 대한 모노타입 하중계의 현장 적용성 평가
Field Applicability Evaluation of Monotype Load Cell for Load-Distributing Anchor
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초록
건설 구조물을 지반에 정착시켜 구조물을 안전하게 유지하기 위한 그라운드 앵커공법은 정착 방식에 따라 하중분산형 앵커와일반형 앵커로 구분된다. 최근 현장에서는 앵커의 인장력이 크게 나타나는 하중분산형 앵커를 적용하는 사례가 증가하는추세이지만 그에 따른 현장 적용성에 대한 문제점도 있다. 하중분산형 앵커는 강연선에 인장력을 각각 다른 구간에 정착시켜가하는 방식으로 앵커체의 길이 차이로 인해 정착장 별 최대 인장력 크기가 다르게 나타나는 편하중의 문제점이 발생하고있다. 이에 본 연구에서는 앵커의 편하중에 따른 품질관리 방안으로 하중분산형 앵커의 각 강연선별로 하중 측정이 가능한모노타입 하중계를 개발하였으며, 기존의 멀티타입 하중계와 모노타입 하중계의 측정 결과를 비교 분석하여 현장 적용성을분석하였다. 그 연구 결과, 멀티타입 하중계는 내하체별 작용하중을 추정할 수 밖에 없어 하중분산형 앵커의 강연선별 편하중 발생에 따른 관리는 불가능하였다. 그러나 모노타입 하중계의 경우에는 각 내하체별, 강연선별로 하중이 측정되어 지반조건, 시공조건 등에 상관없이 각 강연선별로 하중값이 측정되어 편하중 발생에 따른 안전관리와 시공관리가 가능할 것으로 판단된다.
Abstract
According to the method of settling the construction structure on the ground to keep the structure safe, the ground anchor method is divided into a load-distributing anchor and a general anchor. Recently, the application of load-distributed anchors, which show a large degree of recognition by anchors, is increasing in the field, but the problem of field applicability is also caused. The load-distributed anchor fixes the tensile force to each section of the lecture line and applies it, causing a problem of asymmetric loads in which the maximum tensile force size of each settlement site differs due to the length difference of the anchor body. Therefore, in this study, as a quality management method according to the asymmetric load of anchors, a mono-type load cell that can measure the load for each lecture line of a load-distributed anchor was developed, and the field applicability was analyzed by comparing and analyzing the measurement results of the existing multi-type load cell and mono-type load cell. As a result of the study, the multi-type load cell had no choice but to estimate the working load for each inner body, so it was impossible for the load-distributed anchor to manage it according to the generation of asymmetric loads for each lecture line. However, in the case of a mono-type load cell the load was measured for each inner body and for each lecture line, regardless of ground conditions and construction conditions, and thus the load value was measured for each lecture line, enabling safety management and construction management according to the occurrence of asymmetric loads.
참고문헌 (12)
- Englert, C. M., "Development of Removable Load Distributive Compressive Anchor Technology", IFCEE 2015, pp.748~762 (2015), ASCE
- Han, J. H., "A Study of Behavior Characteristics of Load Distributing Ground Anchor System based on Field Tests and Numerical Analyses", Ph.D, pp.2016
- Han, J. M., "Evaluation of Pullout Capacity of Anchors by Bonded Length through Model Test", Journal of the Korean Geosynthetics Society, 16(3), pp.11~19 (2017)
- Hertz, J. S., "Removable Compressive Load Distributive Strand Anchors: Case History and Lessons Learned", IFCEE 2015, pp.1597~1607 (2015), ASCE
- Hong, L., "Study on Anchorage Mechanism of Pressure Dispersed Anchor by Numerical Analysis", Chinese Journal of Underground Space and Engineering, 11, pp.446~455 (2015)
- Hwang, T. H., "Pullout behavior of Multiple Compression Type Anchor with the Space of Load Point", Journal of Korean Society of Hazard Mitigation, 16(3), pp.271~279 (2016)
- Jo, B. H., "Load transfer behavior and interference effect of load distributive compression anchor in residual soil", Acta Geotechnica, 16(6), pp.1~18 (2023)
- 김지호, "다중정착 지반앵커의 하중전달 특성", 박사, 토목공학과, pp.2013
- Kim, J. H., "A Study on the Characteristics of Multi Load Transfer Ground Anchor System", Journal of Korean Tunnel Underground Space Association, 16(1), pp.25~50 (2014)
- Lee, J. U., "Effect of Multi-Compression Type Anchor with the Installation Space of Compression Tube", Ph. D, pp.2014
- Lee, K. I., "Improvement of Pullout Loads by Variation of Two Load Points in Anchorage System", Geotechnical Engineering, 23, pp.3330~3339 (2019)
- Song, Y. J., "Limit Load Analysis of Distributive Compressive Anchor through Mono Type Load Cell", Fall Geosynthetics Conference, pp.107~108 (2023)