Continuous River Levee Safety Assessment based on a Reliability Analysis

A design scheme is proposed to evaluate the safety of continuous linear structure i.e. river levee. The scheme is developed to establish a procedure to continuously evaluate the stability failure of embankment during flood runoff by seepage, and to identify locations for reinforcement of river levee. A 20km stretch of a fairly large river...

Interactive Evaluation of the Reliability of Engineered Slopes Utilising Multi-source Monitoring Information

Important engineered slopes are often heavily instrumented and their performance routinely monitored through these instruments. The evaluation of the safety of the slopes based on the monitored information is however a challenge. A systematic method is presented in this paper for evaluating the slope safety by combining multi-source monitoring...

Reliability Analysis of Heterogeneous Slope Considering Effect of Distribution Types

The effect of probability distributions on the slope reliability is highlighted in this study since the lognormal distribution is often used to characterize the variability of soil properties to avoid negative values. A multiple response-surface based MCS method for slope reliability analysis in spatially variable soils is proposed. A...

Influence of Model Accuracy on Load and Resistance Factor Calibration of Steel Strip Walls

This study examines the load and resistance factor design calibration for the ultimate pullout limit state for steel strip reinforced soil walls (SSWs). The tensile loads and pullout capacities of reinforcement strips that were measured during full-scale tests are compared with predicted (nominal) values using analytical models recommended by...

Geotechnical Reliability Analysis Involving Spatially Autocorrelated Soil Properties

Spatial autocorrelation arises in geological material by virtue of its formation by natural processes acting over long geologic time (millions of years). This endows geomaterial with some unique statistical features (e.g. spatial variability) not commonly found in structural material manufactured under strict quality control. For example, by the...

Reliability Analysis of Near Surface Disposal Facilities using Collocation Based Stochastic Response Surface Method

The safety assessment and reliability analysis are the two critical factors that affect the design of a complex structured system. In this paper, safety assessment model is used and the radiation dose of radionuclides are evaluated. The model is developed based on single dumping mode of disposal. In the present paper, radioactive carbon (14C) is...

Non-intrusive Reliability Analysis of Multi-layered Slopes in Spatially Variable Soils

Stochastic finite element method and random finite element method can provide rigorous tools for slope reliability analysis incorporating spatial variability of soil properties. However, both of them are difficult to be applied into practice due to the modification of finite-element codes and the low efficiency, respectively. To address these...

Effect of Laboratory Repeatability of Direct Shear Test on Slope Stability

The present work quantified the laboratory geotechnical variability by repeatability direct shear test (DS) on alluvial fine-grained soils. The effect of laboratory variability of geotechnical parameters (cohesion c' and friction angle ϕ′) on slope stability was investigated. A mixture of compacted fine sand (40%) and clayey silt (60%) taken...