Research Work in Developing Design Solutions on the Example of Soil Reinforcement Under the Foundations of Supports of Stairs to the Magdeburg Law Monument in Kyiv

The stairs leading to the oldest existing monument in Kyiv – the Magdeburg Law Monument – stretch along the slope of Khreshchatyi Yar. The last reconstruction was carried out in 2013. In 2019, as part of scientific and technical support work for the construction of a pedestrian and bicycle bridge crossing between the parks "Khreshchatyi" and "Volodymyrska Hirka", research work was carried out aimed at securing the soil base under the columns’ foundations of the stairs to the Magdeburg Law Monument. The authors developed scientifically based structural and technological solutions for securing the foundations under the foundations of the staircase columns, which began to shift along the slope during the construction of temporary supports of the pedestrian and bicycle bridge crossing next to them. During experimental studies, the effectiveness of the method of securing soils with polyurethane materials was tested and proven. It was found that due to the introduction of polymeric materials, the soil was compacted, and fastened with strong layers of the soil-polymer mixture that penetrated it. Based on the results of experimental studies, design solutions were developed that provide for the injection of polyurethane material through two separate tubes at two elevation levels from the base of the foundation.