Soil-cement structures at the erection of foundations of buildings and structures

Abstract

The territoryof Ukraineis characterized by complex engineering and geological conditions: soft, structurally unstable soils, loess subsidence loams and sandy loams, in dense urban development often have to deal with quaff, slopes, which leads to higher prices for the construction of buildings and structures due to the additional cost of preparing the grounds and foundation construction. Tarring, bituminization, silicatization are aggressive methods for grouting, cement is more environmentally friendly. Mixing local soil with cement, lime, gypsum, slags and with the introduction of various additives allows to obtain material − soil cement, which has recently been widely used in footing and foundations as well as in solving various geotechnical problems. Preparation of footing in the construction of buildings and structures on soft, structurally unstable soils (subsidence soils of type I subsidence, bulk, ground, flowing silt-loam soils) is usually constructively performed by reinforcing the soil with vertical rigid soil-cement elements with high percentage of cement content. Such solutions are made on the basis of the technical characteristics of common construction equipment in our country, as well as design requirements while securing the grouting is carried out to a sufficiently large depth. Investigation of the rationality of the application of soil-cement structures with lower cement content in soft, water-saturated and loess soils of type I subsidence. The use of modern mechanisms and equipment in the manufacture of cement elements makes it possible to use structure, with less content cement in the construction of foundations of buildings and structures. With a decrease in the content of cement, the deformability and crack resistance of soil cement increase, as a result, it can no longer be considered as a structural element of the foundation, it can be effectively used as an artificial footing for building foundations. Numerical methods of calculation established the influence of soil cement parameters on the operation of the system “structure-foundation-soil cement footing”.