suffusion, colmatage (clogging), hydraulic gradient, filtration deformations, porous medium
Abstract
The article provides an analysis of theoretical studies of suffusion processes occurring in drainages on reclamation systemsand hydraulic structures made of soil materials. The primary focus of the article is mechanical suffusion, defined as the transfer and removal of small particles in the soil massif under the influence of filtration flow, accompanied by changes in the porosity of the medium and the filtration coefficient. The mechanisms of internal and external suffusion, as well as the process of colmatage – the stoppage of the movement of particles in the pores – are considered.This paper presents a comprehensive review of the extant literature on the subject, together with the results of laboratory andfield studies. The aim of the study is to characterise the influence of the hydraulic gradient on the intensity of filtration deformations. The following paper summarises the known criteria of soil suction resistance, in particular the coefficient of heterogeneity of the particle size distribution and the critical hydraulic gradient. An analysis is conducted of traditional and modern models that are utilised for the quantitative prediction of the development of sulfides in heterogeneous media.The necessity of supplementing the classical equations of filtration flow with the equations of mass balance of moving particlesis substantiated. It has been demonstrated that contemporary classical theoretical approaches (Darcy, Boussinesq, Dupui –Forchgeimer’s model, etc.) fail to account for temporal variations in the filtration coefficient resulting from suffusion deformations of the soil massif. The analysis of the results of theoretical and experimental studies confirms the significant impact of particle movement on the water intake capacity of drains.It is concluded that predicting the performance of drainage systems is impossible without taking into account the suffusionchanges in the subsoil zone. It is imperative to enhance mathematical models by incorporating the progression of suffusion processes as a pivotal factor influencing the transformation of hydraulic parameters within the filtration system.
Author Biographies
M. M. Khlapuk, National University of Water and Environmental Engineering
Doctor of Engineering, Professor
S. V. Klimov, National University of Water and Environmental Engineering
Candidate of Engineering (Ph.D.), Associate Professor
A. A. Biletskуi, Kyiv National University of Construction and Architecture
Candidate of Engineering (Ph.D.), Associate Professor
A. O. Shumlіanskyi, National University of Water and Environmental Engineering
Post-graduate Student
V. S. Osadchyi, Odessa State Academy of Civil Engineering and Architecture, Odessa
Candidate of Engineering (Ph.D.), Associate Professor
