Research of properties of cement-soil piles of foundations of buildings and structures

Abstract

The review of soil types prevailing in Western Siberia of the Russian Federation is presented. The compositions and physical and mechanical properties of soils are analyzed. Special attention is paid to loess subsidence soils. The problem of obtaining a homogeneous cement-ground mixture is formulated and set. The technological scheme of production of cement-ground piles of foundations of buildings and structures by drilling-mixing method with mechanical activation is considered. Considers methods of strengthening the loess subsidence of soils. Methods for studying the properties of cement-based piles of foundations of buildings and structures are formulated. A multi-factor experiment was conducted to evaluate the parameters that affect the properties of cement-based piles. Based on the research results, conclusions and recommendations are formulated.

Monitoring the deformation parameters of reinforced soil masses

“…The spacing of reinforcing elements, their diameters and material characteristics depend on the required deformation characteristics of the massif, which are to be achieved by reinforcement. Analyzing the authors experience in the reinforcement of soils by vertical elements [6,7] and examples of implementation of such reinforcement published by other authors [8,9,10] and recommendations of regulatory documents one can conclude that when reinforcing clay and sandy soils the reinforcement elements are usually placed in a staggered arrangement with a step of three to five diameters of reinforcement elements (Figure 1). By varying the diameter-dependent spacing of the reinforcing elements, the deformability and strength of the reinforced massif can be increased or decreased through the corresponding influence of the material of the reinforcing elements.…”

The Emergence and Development of a Crack in the Concrete of the Abutment of the Lower Head of Lock № 2 of the Volga-Baltic Waterway

“…Стабилизация конструкций нижней головы может быть обеспечена переносом опирания со слабых грунтов, находящихся непосредственно в основании головы, на грунты с более высокой несущей способностью (на глубинах 12-13 м ниже основания нижней головы залегают плотные пески). Для переноса нагрузки от бетонного массива нижней головы на более прочное основание необходимо предусмотреть устройство свайного ростверка [27] с использованием буронабивных [28] или щебеночных [29] свай.…”