Coefficient of lateral soil pressure when using reinforced and unreinforced piles filled sand & granite grain for strengthening roads layers

Several research studies have been conducted to strengthen weak road layers, regardless of whether they are under construction or constructed, and require maintenance using substrates filled with different materials, which have proven effective in increasing the strength of these layers. In this study, the objective of the work is to identify the maximum and minimum values of the coefficient of lateral soil pressure under various conditions when using reinforced and unreinforced piles filled with sand or granite grains and the extent of their contribution to strengthening road layers. An experiment was conducted using a box filled with soil, piles filled with sand grains or granite grains. It’s confirmed that there is a difference between the coefficients of lateral soil pressure when the piles are unreinforced or reinforced by dividing the sample into 2,3,4,5,6 parts by arming. The study found that the maximum value of the coefficient of lateral soil pressure in the case of sand (1 mm) reinforced is 0.38, whereas the maximum value in the same case with no reinforcement is 0.29. The maximum value of the coefficient of lateral soil pressure in the case of granite grain (2 mm) reinforced is 0.27, whereas the maximum value in the same case without reinforcement is 0.17. Moreover, the maximum value of the lateral pressure coefficient in the case of gravel (3 mm) reinforced is 0.26, and the maximum value in the same case without reinforcement is 0.30.