Ground improvement is to increase stability, reduce the permeability of soil and rock reinforcement layers of ground, reduce liquefaction potential, increasing the bearing capacity of soil and rock and prevent soil erosion done. One of the most common methods of ground improvement is grouting in which the fluid is injected into the ground as grout through the Borehole and fill the joints and cracks in rock or soil pores and voids, resulting in improved mechanical and physical properties of the ground. In the present study, for the first time we use Urea-formaldehyde resin as an additional substance for creating a cement and chemical based mix grout with analogous injection system constructed for experiments based on ASTM D 4320, which is used for injection in sandy soil in alluvial formations. Curing period, water/cement ratio and the percentage of Urea-formaldehyde resins are the parameters examined in this study. considering wet condition for injected soil samples, curing period found to be 28 days and at the time less than that, grout does not have the opportunity to paste soil particles to each other In other words, The soil has been injected does not reach high resistance. experimental results illustrate that in grouted samples with cement and chemical based mix grout with water–cement ratio of 2 the highest amount of uniaxial compressive strength relate to when grout containing 10% Urea-formaldehyde resin and in this case resistance of grouted samples with mix grout compared to resistance of grouted samples with cement-based grout 154 % increases after passing their curing period. The same result was observed in grouted samples with cement and chemical based mix grout with water–cement ratio of 1.5 that the presence of 10% of the Urea-formaldehyde resin in the grout causing the sample to show the highest uniaxial compressive strength. In General the presence of Urea-formaldehyde resin along the cement-based grout will lead to increase the injected samples resistance than when only the cement-based grout will be used. Increase the percentage of Urea-formaldehyde resin in mix grout usually leads to an increase in the amount of failure strain, elastic modulus and velocity of longitudinal waves in the samples. The permeability test results showed that the cement -base grout injection with water/ cement ratio 2 leading to decreased permeability to 98.6% and when the water-cement ratio is 1.5, the permeability decreased by 98.8 percent. Also increasing urea-formaldehyde resin percentage in a mix grout leads to a decrease the permeability of grouted samples to 99/8%. It means that the presence of urea-formaldehyde resin in the grout will have little effect on the permeability of the sample was injected.