Controlling collapsibility potential by improving Iraqi gypseous soils subsidence: A Review study

Abstract

Gypseous soils classified as the most difficult soil due to their complex and unexpected behaviour. Gypseous soils around the world, formed mainly in arid and semi-arid lands. In Iraq, gypsum soil covers 20-30% of total area of Iraq specifically, in western, south and southern west areas. For the soil engineer, it is of great importance to know properties of soil before designing and building any structure. Since the gypseous soil can collapse when the water run through, therefore, many Iraqi researchers have worked out to find the best methods to improve this kind of soil. This paper summarizes most of these studies and present chemical and physical treatment applied to gypsum soils in Iraq to improve bearing capacity of gypsum soils and reduce settlement and collapsibility, improve the Bearing capacity in present study improved AL Fallujah Gypseous soaked soil after using geogrid increase the Bearing capacity about (51)%.