Authors: A.V. Uglyanitsa

Title of the article: Substantiation of the parameters technology of stowing unused urban underground structures by casting

Year: 2022, Issue: 1, Pages: 83-90

Branch of knowledge: 25.00.22 Geotechnology (underground, open and construction)s

Index UDK: 624.121.542

DOI: 10.26730/1999-4125-2022-1-83-90

Abstract: To prevent the formation of sinkholes or subsidence of the earth's surface in the city as a result of the collapse of unused dilapidated underground structures out of accessibility for transport means, it is proposed to stow them with a cast method - a hardening concrete mixture based on a cement binder with a finely ground rock filler. To substantiate the parameters of the underground structure stowing by casting, laboratory tests were carried out to determine the rational composition of the filling rock-cement concrete mixture. It was determined that sedimentary rocks with a tensile strength in uniaxial compression (25-40) MPa with one or two small standard fractions with dimensions "-0.315", "-0.63 +0.315" and "-1.25 + 0.63" should be used as a filler for stowing concrete; nevertheless, according to the totality of engineering, technological, physical and mechanical indicators, it is recommended to use stowing concrete with a one-component -0.315 mm fraction filler. A technique is proposed for determining the rational composition of the components of a filling concrete mixture with mobility, which ensures its transportation through pipes into the underground structure space.

Key words: underground structure collapse stowing by casting concrete mix fine aggregate sedimentary rock

Receiving date: 29.12.2021

Approval date: 30.01.2022

Publication date: 25.02.2022

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