Permeation grouting is used as one of the injection methods to improve soil structure. In this method, after digging the ground to the required depth, in a triangular or square grid and installing perforated polyethylene pipes punctured at regular intervals and performing initial sealing, cement grout and necessary additives are injected in stages. Based on the obtained experiences, in the presence of granular soil and high groundwater level, the performance of this method is evaluated as optimal. Asian Stone Column Company, with its equipment, specialized personnel and valuable experiences in this field, has a good performance in drilling for injection.