Review article

The article provides a brief analysis of the existing types of excavation pit enclosure and a comparison analysis of their rigidity. Examples of the effectiveness of the cutoff «rigidity screen» are given. Taking into account the real engineering-geological conditions of St. Petersburg, there has been carried out a numerical analysis by the finite element method for the pit enclosure made of sheet piles and several options of the «rigidity screen». The effectiveness of a double-row sheet piling enclosure with an intermediate layer of soil in the natural condition and artificially-fixed jet grouting soil massif is analyzed.