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한국지반공학회 / v.13, no.5, 1997년, pp.101-124 
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사면보강 뿌리말뚝공법의 준3차원적 안정해석기법
( Method of Quasi-Three Dimensional Stability Analysis of the Root Pile System on Slope Reinforcement ) |
| 김홍택;강인규;박사원; 홍익대학교 공과대학 토목공학과;홍익대학교 대학원 토목공학과 박사과정, 홍익대학교 대학원 토목공학과;;
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| 초 록 |
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| The root pile system is insitu soil reinforcement technique that uses a series of reticulately installed micropiles. In terms of mechanical improvement by means of grouted reinform ming elements, the root pile system is similar to the soil nailing system. The main difference between root piles and soil nailing are due to the fact that the reinforcing bars in root piles are normally grouted under high pressure and that the alignments of the reinforcing members differ. Recently, the root pile system has been broadly used to stabilize slopes and retain excavations. The accurate design of the root pile system is, however, a very difficult tass owing to geometric variety and statical indetermination, and to the difficulty in the soilfiles interaction analysis. As a result, moat of the current design methods have been heavily dependent on the experiences and approximate approach. This paper proposes a quasi-three dimensional method of analysis for the root pile system applied to the stabilization of slopes. The proposed methods of analysis include i) a technique to estimate the change in borehole radium as a function of the grout pressure as well as a function of the time when the grout pressure is applied, ii) a technique to evaluate quasi -three dimensional limit-equilibrium stability for sliding, iii) a technique to predict the stability with respect to plastic deformation of the soil between adjacent root piles, and iv) a quasi -three dimensional finite element technique to compute stresses and dis placements of the root pile structure barred on the generalized plane strain condition and composite unit cell concept talon형 with considerations of the group effect and knot effect. By using the proposed technique to estimate the change in borehole radius as a function of the grout pressure as well as a function of the time, the estimations are made and compar ed with the Kleyner 8l Krizek's experimental test results. Also by using the proposed quasi-three dimensional analytical method, analyses have been performed with the aim of pointing out the effects of various factors on the interaction behaviors of the root pile system. |
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| 키워드 |
| Root pile system;Quasi-3D stability analysis;Quasi-3D FEM analysis;Network effect;Pressure-injected cement grouting; |
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한국지반공학회지:지반 / v.13, no.5, 1997년, pp.101-124
한국지반공학회
ISSN : 1229-215X
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199711920447663)
언어 : 한국어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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