Effect of Soil Nailing on Some Problematic Soils

Abstract

The land scape is subjected to higher temperature during the last three decades became of "Globule warming", which became high evaporation of surface water, in addition to the increase in salt content , because of the unaffected irrigation way, of planets and the increase in the capillarity action which contribute with this process. This may led to the dissolution of salts inside soil and its appearance on the ground surface, with different depths. The NaCl salt is one of the most common salts presence in widely areas in Iraq, which has high dissolution rate in water. The problem of such soils appear when subjected to miniaturization from any source, resulting high dissolution rate of the salts in side soil skeleton, which lead to the weakening of soil, cavities may appear inside soil layer, and so it may led to failure of structures constructed on it.This study includes the feasibility of improving the collapsibility of natural saline soil with 10% salt percent, brought from, Jurf Al-Milih region in Diyala Governorate, by mixing it with randomly distributed nail reinforcement, with three different lengths "Ln", related to width of footing "B" , (Ln/B=11%, 14.2% and 21.4%). By carrying settlement test for single model footing with time, for treated and untreated model using this technique at both dry and wetting conditions, using locally manufactured Laboratory model. This technique reduce the collapsibility of such soil, 27%.The study includes also the effect of mixing....