Reliability of embankments on soft ground using constrained optimization
نویسندگان
چکیده
The paper deals with the stability of reinforced embankments on soft clay foundations, and presents alternative practical and versatile procedures for easy implementation of the traditionally tedious and iterative limit equilibrium methods of slices, including Bishop’s simplified method and Spencer’s method of slices. The proposed implementation procedures combine the use of constrained optimization techniques and simple programming in the spreadsheet environment, with automatic search for the critical slip circle. The deterministic approach is extended to a probabilistic approach that accounts for the uncertainties and spatial variation of the soil parameters. The advantages of the proposed methods are simplicity, transparency, versatility, accuracy, and ease of implementing stochastic reliability analysis in the ubiquitous spreadsheet platform, notwithstanding the implicit and iterative nature of the limit state functions. in the Proceedings of the Third International Conference on Soft Soil Engineering, 6-8 December 2001, Hong Kong, p.123-128, A.A. Balkema Publishers.
منابع مشابه
Settlements and Consolidation Rates under Embankments in a Soft Soil with Vertical Drains
In this paper, a study was carried out in order to estimate settlements and consolidation rates under embankments constructed on Moroccan soft soils. Settlement measurements in several embankments in High Speed Railway project between two Moroccan cities, Tangier and Assilah, were analyzed. The objective of this study is to estimate settlement values and settlement rates, with sufficient prec...
متن کاملA Numerical Study on Geofoam Application in the Settlement Reduction of Railway Embankments
Construction of railway track embankment over a soft subgrade will bring the necessity of using soil improvement methods for bearing capacity and settlement criteria satisfaction. As a practical improvement method, railway embankment filled with geofoam blocks is studied in this paper. First; a bilinear stress-strain model developed in FLAC2D to simulate geofoam embankment behavioral model. Sec...
متن کاملRecent research and development of ground column technologies
In recent years, ground columns, such as vibro-concrete columns and geosynthetic-reinforced stone columns, have been increasingly used to support superstructures and embankments when they are constructed on soft foundations. Several new column technologies have emerged, including different shapes of concrete columns and composite columns. The column technologies have also been combined with oth...
متن کاملFinite Element Analysis of Embankments on Soft Ground Incorporating Reinforcement and Drains
متن کامل
Reliability-Constrained Unit Commitment Considering Interruptible Load Participation
From the optimization point of view, an optimum solution of the unit commitment problem with reliability constraints can be achieved when all constraints are simultaneously satisfied rather than sequentially or separately satisfying them. Therefore, the reliability constraints need to be appropriately formulated in terms of the conventional unit commitment variables. In this paper, the reli...
متن کامل