All Issue

2014 Vol.13, Issue 4 Preview Page
Reliability Analysis for Optimization of Construction Method of Drain Material

배수재 시공의 최적화를 위한 신뢰성 해석

Hyeon-Min Ahn1
,
Moon-Chae Kim2
,
Daehyeon Kim3*
안 현민1
,
김 문채2
,
김 대현3*
1Graduate Student, Department of Civil Engineering, Chosun Univ.
2Graduate Student, Department of Civil Engineering, Chosun Univ.
3Associate Professor, Department of Civil Engineering, Chosun Univ.
*교신저자. *Corresponding Author. 
30 December 2014. pp. 87-96
PDF XML Citation
Abstract

In this paper, reliability analysis was done on the characteristics of consolidation and settlement for the inner temporary dike where a weak ground improvement construction was applied. When the consolidation analysis on the foundation ground was done, the following conclusions were obtained by conducting the stability analysis on the effect of space of drains, the effect of consolidation time, and the residual settlement and differential settlement. When construction was done with a drain space which satisfied 95% probability of reaching a target consolidation in each divided area, the occurrence of a residual settlement was within the range, which did not exceed 10cm. It was shown that there was almost no possibility of the occurrence of differential settlement, which was above the permissible differential settlement slope.

Keywords
Consolidation
Stability
Drain
Residual Settlement

연약지반 개량공법을 적용한 내부가호안의 압밀침하 특성을 신뢰성 해석을 이용하여 분석하였으며, 이를 통해 PVD 최적 타설 간격을 설정하였고 외곽호안은 압밀기간 변화에 따른 잔류침하에 대해 안정성을 확보하는지를 검토 하였다. 연약지반 압밀침하 특성에 대한 신뢰성 해석 결과에서 지반정수의 불확실성을 고려해 과다 적용된 배수재 타설 간격을 각 구견별로 구분하여 적용함으로써 지반정수의 불확실성과 안정성을 모두 확보하는 동시에 공사비 측면에서도 경제적인 연약지반 개량공법의 형식으로 검토되었다. 또한 허용잔류 침하량을 초과할 확률이 10%이내에 해당하는 압밀기간을 적용하여 잔류침하에 대한 안정성을 확보하였으며, 각각의 분할된 영역에서 목표 압밀도에 도달할 확률이 95%를 만족하는 배수재 간격으로 시공하고 잔류침하량의 발생량이 10cm를 초과하지 않은 범위일 때는 허용부등침하경사 이상의 부등침하가 발생할 가능성은 거의 없는 것으로 나타났다.

References
1
1.Cornell, C.A.(1969), “A Probability-Based Structural Code”, Proceeding of The American Concrete Institute, Vol.66, No.12, pp.974-985.
2
2.Freudenthal, A.M. (1947), “The Safety of Structures”, Electrical Transmission and Substation Structures, Vol.112, pp.125-180.
3
3.Jin, K.N., Park, Y.B. and Hong, E.S. (2012), “Improvement of Soft Ground Design Criteria using In-situ DB”, Land & Housing Institute Research Report, pp.1-19.
4
4.Kim, B.S. and Kim, B.I. (2007), “Probabilistic Analysis and Design of the Spacing of Prefabricated Vertical Drains Considering Uncertainties in Geotechnical Property”, Journal of the Korean Geotechnical Society Engineering, Vol.23, No.4, pp.125-132.
5
5.Kim, Y.S., Jeong, W.S., Jeong, H.C. and Im, A.S. (2006), “Prediction of Various Properties of Soft Ground Soils using Artificial Neural Network”, Journal of Korea Society Civil Engineering, Vol.26, No.2, pp.81-88.
6
6.Lacasse, S. and Nadim, F. (1996), “Uncertainties in Characterizing Soil Properties.” Uncertainty in the Geologic Environment, Madison ASCE, pp.49-75.
7
7.Lee, C.E. (2008), “Reliability Analysis and Evaluation of Partial Safety Factors for Wave Run-up”, Journal of Korean Society of Coastal and Ocean Engineering, Vol.20, No.4, pp.355-362.
8
8.Lee, K.H., Jung, D.S. and Park, C.D. (2006), “Settlement Estimation of Soft Ground considering Uncertainty in Geotechnical Properties”, Journal of the Korean Institute for Structural Maintenance and Inspection, Vol.10, No.1, pp.477-482.
9
9.Lee, K.H. (2007), “Analysis of Consolidation Considering Uncertainties of Geotechnical Parameters and Reliability Method”, Journal of the Korean Institute for Structural Maintenance and Inspection, Vol.11, No.4, pp.138-146.
10
10.Lee, T.S. (2008), A Study of the Comparison between Actual Consolidation Settlement and Prediction Settlement considering Reliability Theory Method on the Soft Ground, Mater`s Thesis, Daejeon University, pp.1-10.
11
11.Lind, N.C. and Hasofer, A.M. (1974), “Exact and Invariant Second-Moment Code Format”, Journal of the Engineering Mechanics, Vol.100, No.1, pp.11-121.
12
12.Park, C.H. (2009), A Study on the Prediction of Consolidation Settlement in Soft Clays, Master`s Thesis, Pukyong National University, Korea, pp.1-10.
13
13.Phoon, K. K., and Kulhawy, F.H. (1999), “Char-acterization of Geotechnical Variability,” Canadian Geotechnical Journal, Vol.36, pp.612-624.
14
14.Pugsley, A. (1995), “Report on Structural Safety”, Journal of Structural Engineering, Vol.33, No.5, pp.141-149.
15
15.Sinozuka. M (1983), “Basic analysis of Structural Safety”, Journal of Structural Engineering,  Vol,109, No.3, pp.721-740.
16
16.Rackwitz, R. and Fiessler, B. (1978), “Structural Reliability under Combined Random Load Sequences”, Computer and Structures, Vol.9, pp.484-494.
Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 13
  • No :4
  • Pages :87-96
  • Received Date : 2014-08-26
  • Revised Date : 2014-11-28
  • Accepted Date : 2014-12-01
  • DOI :https://doi.org/10.12814/jkgss.2014.13.4.087
Journal Informaiton Journal of the Korean Geosynthetics Society Journal of the Korean Geosynthetics Society
  • NRF
  • KOFST
  • KISTI Current Status
  • KISTI Cited-by
  • crosscheck
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close