The creep deformation of expansive soil has been considered as a vital threat to the safety in engineering construction because it may cause serious slope diseases geological engineering. Meanwhile, since usually remains unsaturated state, its mechanical property is significantly affected by seasonal environment. Therefore, nonlinear received increasing attention, especially humidity-dependent ...

In this research, six samples of valid and widely soil-water retention curve (SWRC) estimation models, including van Genuchten, Brooks Corey, Fredlund Xing, Durner, Kosugi, Seki were studied. To realize approach, in the first step, accuracy each model was calculated using ten statistical benchmarks, then numbers obtained from fitting standardized based on benchmark by standard fuzzy method so t...

In this study, the aim was to compare experimental and empirical methods used for estimation soil water retention under different conditions. Soil samples were chosen represent examples of heavy, medium light structures. Water curves obtained in laboratory using standard method. The van Genuchten (1980) (vG), Brooks Corey (1964) (BC) empirically. Model parameters determined by artificial neural...

Several structures are built on collapsible soils in the mining and petroleum industries civil sites. In order to analyze stability of such structures, one must properly study unsaturated soil behavior. Collapsible frequent sand that susceptible a significant sudden reduction volume upon wetting. An important factor is matric suction, which es related moisture content through water Characterist...

Abstract Klang Valley area is one of the most landslide-prone areas in Malaysia, especially at Hulu Kelang, Kuala Lumpur. The has been frequently hit by landslide since 1990s. Soil instability agreed researchers occurred due to high precipitation and long duration rainfall which cause property damage leading injury fatality. Slope failure also triggered antecedent leads infiltration rainwater i...

Pedotransfer Functions (FPT) are mathematical models that estimate difficult-to-measure soil properties through more accessible variables, generating optimization of time and financial resources. In this study, six Functions, based on the equation Van Genuchten, analyzed for prediction volumetric moisture Brazilian soils, with data from global database Soil Data Task. Applied pressures 0, 0.01,...

Accurate inversion of soil hydraulic parameters based on the van Genuchten–Mualem model has received much attention in science research. Herein, a hybrid algorithm method using particle swarm optimization and vector-evaluated genetic was used to invert θs, α, n, Ks, with objective functions infiltration rate, cumulative infiltration, water content. Then, numerical experiments were conducted fou...

Unsaturated soils exhibit water retention hysteresis, with different behaviour during drying and wetting paths. Water hysteresis has often been modelled using expressions for the main curves that are unsatisfactory at low values of degree saturation. In addition, effect on unsaturated hydraulic conductivity typically not explicitly considered. This paper presents a new hysteretic constitutive m...

When calculating of the moisture transport in concrete such geotechnical structures as a pile or diaphragm wall, contact with soil is forming special boundary conditions. If full saturated state, then Darcy’s law should be used to solve problem, condition for which water pressure. Otherwise, Bažant- Najjar model used, relative humidity environment at certain temperature. The temperature unique ...