The emergency analysis when sinking the shaft of the main municipal collector in the city of Perm is considered For groundwater protection and engineering service lines maintenance in the course of construction, the use of a watertight diaphragm made from secant soil-cement piles by "jet-grouting" method was provided. To analyze this situation additional engineering-geological survey and numerical simulation of the collector using PLAXIS 2D and PLAXIS 3D Foundation software packages were carried out. As a result, the cause of the emergency situation was determined. The soil and hydrological conditions and construction methods used for this project were analyzed.
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