Determination of filtration characteristics of concrete structures of the underground constructions on the basis of the monitoring data

Abstract

The paper presents a methodology based on the integrated studies of the strength and filtration characteristics of the underground supporting structures to solve the problem of identification of the conditions, favorable for the formation of the defects in their supporting structures and to propose measures to improve the quality of the concrete linings. To identify the potencial variability of the water permeability of the concretelinings the deviation of the coefficient of filtration of the concrete from an average value, or the coefficient of variation, is found. The coefficient of variation allows determining the calculated value of the coefficient of filtration, which should be included in the lining design. The higher the value of the coefficient of variation is, the more heterogeneous lining is and the higher the probability of a leak is. The areas where the lining will be filter the water because of an insufficient density are identified, as well as areas, which are safe in this respect.