Nowadays, the problem of fixing soils in construction is very relevant. Jet grouting is one of the most effective methods of soil stabilization. This injection method allows you to create a geotechnical screen and significantly reduce the subsidence of the base. This technology is widely used both in Russia and abroad due to economic, environmental feasibility and technical efficiency. This article describes the algorithm the automation of the design process when the technological strengthening of soil grouting piles in the tunnel about space. On the basis of the developed algorithm was created by the application software for AutoCAD system, which is usually developed project documentation.