다층지반에 근입된 현장타설말뚝의 수평 지지거동분석
Lateral Resistance Behavior Analysis of Drilled Shafts in Multi-layered Soil
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In this research, load-transfer-function method was selected, because that is widely used in geotechnical engineering among the analysis methods to verify the behavior of load-lateral displacement. Lateral loading test of field scale was conducted, this measured data was analyzed. From the analysis, the model of load-lateral displacement was suggested. The test results were studied and compared to the commercial programs, ‘LPILE’, which contain the load transfer functions proposed before. By analysis of measure data of load-lateral displacement that expressed to several functions, model was the simplest and applicable to the field. In that case a value converged about 1.3, b value had a tendency to converge about 0.02. From the comparison analysis between measured data and load transfer function by ‘LPILE’, it is examined that if the lateral load is small, calculated displacements of them show a similar value compared to measured values. Furthermore, the bigger lateral loads, the bigger calculated values compared to the measured data. If the results are compared by Matlock-Reese method and Matlock-API method, Matlock-Reese method shows result of safe side because lateral displacement is calculated greatly relatively.
Abstract
In this research, load-transfer-function method was selected, because that is widely used in geotechnical engineering among the analysis methods to verify the behavior of load-lateral displacement. Lateral loading test of field scale was conducted, this measured data was analyzed. From the analysis, the model of load-lateral displacement was suggested. The test results were studied and compared to the commercial programs, ‘LPILE’, which contain the load transfer functions proposed before. By analysis of measure data of load-lateral displacement that expressed to several functions, model was the simplest and applicable to the field. In that case a value converged about 1.3, b value had a tendency to converge about 0.02. From the comparison analysis between measured data and load transfer function by ‘LPILE’, it is examined that if the lateral load is small, calculated displacements of them show a similar value compared to measured values. Furthermore, the bigger lateral loads, the bigger calculated values compared to the measured data. If the results are compared by Matlock-Reese method and Matlock-API method, Matlock-Reese method shows result of safe side because lateral displacement is calculated greatly relatively.
참고문헌 (9)
- 장서용, "다층지반에 근입된 대구경 현장타설말뚝의 하중전이분석", 박사, pp.2007
- Broms, B. B., "Lateral resistance of piles in cohesionless soils", Journal of Soil Mechanics and Foundations Division ASCE, 90(SM3), pp.123~156 (1964)
- Simplified analysis of laterally loaded piles, "Evans, L. T.", Geotechnical Engineering, Department of Civil Engineering, ~, pp.UCB (1982), GT[DOI]
- Matlock, H., "Generalized solutions for laterally loaded piles", Journal of Soil Mechanics and Foundations Division ASCE, 86(SM5), pp.61~75 (1960)
- Poulos, H. G., "Load-deformation mechanism for bored piles", Journal of Geotechnical Engineering Division ASCE, 97(SM12), pp.1716~1720 (1971)
- Poulos, H. G., "Pile foundation analysis and design" (1980), John Wiley & Sons
- Prakash, S., "Pile foundation engineering practice" (1990), John Wiley & Sons Inc.
- Reese, L. C., "Technical manual of computer program LPILEPLUS3.0", Ensoft, Inc.
- Reese, L. C., "Behaviour of drilled piers under axial loading", Journal of Geotechnical Engineering Division ASCE, 102(GT5), pp.493~510 (1976)