The article provides the definition of a deep pit. The authors substantiated the need for fixing the walls of excavations with a depth of 3-5 meters and the development of methodological recommendations and reference data for the selection of optimal methods and structures used for enclosing the excavation. Wooden sheet pile is the most affordable and technically simple solution for fixing the walls of excavations with a depth of 3-5 meters. The authors calculated the structural characteristics of a wooden sheet pile for various soil conditions according to the method proposed by Professor E.K. Jacobi. The results are presented in a reference table, a fragment of which is given in the article. The developed reference data make it possible to assess the feasibility of using a wooden sheet pile without additional calculations. Engineers can determine the required cross-sections of the fence and struts, the immersion depth of the wooden sheet pile, the step of installing the struts according to the reference data.

Keywords: deep pit, fixing the walls of the pit, sheet pile, E.C. Jacobi method, pit collapse, pit slopes, earthworks, work safety, wooden sheet pile, accident

The article provides the information about the erection procedure of a 50.3 m span truss of a multifunctional sports complex in Nefteyugansk, Russia. The expediency of the considered large-span structure in finished form was substantiated by authors. The advantages and disadvantages of the options for choosing the erection procedure were analyzed in detail. Both types of finished truss erection were simulated in Autodesk Revit software: erection with one crawler crane and with two truck mobile cranes. The advantages and disadvantages of these two methods were observed. Erection process with two truck mobile cranes Liebherr LTM 1160-3.1 does not require complicated motions on the construction site, however it is imposiible with intalled beams between coloumns. For erection process with one crawler crane Liebherr LTM HS 855 HD temporary roads is not necessary, but this crane needs special transport for delivery on site.

Keywords: large-span structure, truss, erection in finished state, suspended cantilever method, jib crane, mobile crane, crawler crane, lifting equipment

This article discusses the issue of planning the sequence of construction of buildings in the quarter development. The authors analyzed and classified the factors that can influence the choice of the sequence of construction of objects in complex development. An algorithm for planning the construction sequence is proposed, which the considered factors are included in the model, taking into account the ranking of their significance.

Keywords: stream method, quarter development, line arrangement, quarterly arrangement, sequence of construction, situational factor, unforeseen factor, social factor, production factor