Journal of the Society of Disaster Information (한국재난정보학회 논문집)
- Volume 3 Issue 2
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- Pages.147-169
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- 2007
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- 1976-2208(pISSN)
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- 2671-5287(eISSN)
A Study on Reinforcing Effect of Multi-Bar Spring Nailing
다철근 스프링 네일링 공법의 보강효과 검토에 관한 연구
- Received : 2007.10.15
- Accepted : 2007.11.22
- Published : 2007.12.31
Abstract
This study investigates the reinforcing effects of the Multi-bar Spring nails with respect to the conventional Soil-nails in artificial slopes. Based on wide experience related to design and construction, soil nails have been widely applied to reinforce slope in the world. Multi-bar spring nails are one of the improved soil nailing methods. These method maximizes bending, shearing, pull-out resistance for those multi-nails, not unit nail, that are inserted in the borehole using special spacer at regular intervals. In addition, because cutting plane is confined effect resulting from a pressured plate at the end of the nails with compression spring equipment, slope stability is secured using MS-nailing method. Analyzing bending, pull-out, shearing condition of MS-nail, it was examined throughly elastic region, load transfer capacity, reinforcing effect on cutting plate of MS-nails. In addition, Pilot and laboratory tests, numerical analysis were carried out to verify the superiority of MS-nailing method. In case, MS nailing method is applied to reinforce artificial slope, it was analyzed that bending, pull-out, shearing resistance was increased more than existing nailing method was applied. In this study, it was shown that surface failure was more or less prevented using MS-nailing method, confining effect on cutting plane using spring stuck to flexible equipment.
Keywords
- Soil Nails;
- Multi Bar Spring Nails;
- Slope Stability;
- bending stiffness;
- Multi Bar Nail;
- Spring Nail;
- Model Test;
- Field Test;
- Finite Element Analysis