Probability Distribution of Engineering Properties of Soil at Telecomunication Sites in Indonesia

Engineering properties of soils, collected from different sites designated for the erection of telecommunication towers, were obtained and analyzed. Probability distribution functions were fitted to this properties. Probability distribution function were fitted to this properties to predict the incidences of their occurance.. Correlation analysis also carried out to check for the relationships if any between the properties. A linear relationship was observed between plastic index and liquid limit, saturated unit weight and angle of internal friction, saturated unit weight and dry unit weight, degree of saturation and water content,saturated unit weight and cohesion, saturated unit weight and dry unit weight. The void ratio,bulk unit weight and dry unit weight were found to follow normal distribution; water content, liquid limit and plasticity index followed the gamma distribution; gravity specification, porosity, saturation, angle of internal friction and cohesion fitted weibull distribution and saturated unit weight fitted log-normal distribution. The study also found that porosity and void ratio have high probability of occurance at their threshold levels. This indicates an unfavorable condition for the soil at this sites