Calculation of deformations of clay foundations and possibility of their stabilization by cement-silicate composition modified with expanded clay dust
Rubrics: MAIN RUBRIC
Authors:
1.
Izhevskiy gosudarstvennyy tehnicheskiy universitet imeni M.T. Kalashnikova
Izhevsk, Russian Federation
Izhevsk, Russian Federation
2.
Izhevsk, Izhevsk, Russian Federation
3.
Izhevsk, Izhevsk, Russian Federation
4.
Izhevsk, Izhevsk, Russian Federation
5.
Kraskovo, Moscow, Russian Federation
Type:
Article
Pages:
from 106
to 114
Status:
Subject area:
2.1.5
691.335
67.09
08.06.01
3
541
691.335
67.09
08.06.01
3
541
Language:
Russian
Keywords:
filtration consolidation, initial head gradient, soil consolidation, expanded clay dust, microcement
Abstract (English):
The deformations of building foundations on clay soils can develop over long periods of time, measured in centuries, causing building settlement. The rate of settlement influences the occurrence of plastic deformations of wall and frame ma-terial. Therefore, the development of methods for calculation of foundation deformations in time is an urgent task. It is known that the theory of filtration consolidation gives similar results to practical observations only for weak water-saturated clayey soils of fluid and fluid-plastic consistency, which often require reinforcement. In such cases, jet grouting or impregnation injection technology is used. Injection mixtures based on microcements are used for this purpose. The pa-per proposes compositions of injection mixtures using expanded clay dust. It is shown that expanded clay dust can be used as an active mineral additive in the injection compositions based on the microcements. It is established that the injection compositions on the basis of the microcement modified with the expanded clay dust have the best efficiency at fixing clay soils, as the sizes of their particles are comparable with the sizes of the particles of the microcements and the expanded clay dust.
The deformations of building foundations on clay soils can develop over long periods of time, measured in centuries, causing building settlement. The rate of settlement influences the occurrence of plastic deformations of wall and frame ma-terial. Therefore, the development of methods for calculation of foundation deformations in time is an urgent task. It is known that the theory of filtration consolidation gives similar results to practical observations only for weak water-saturated clayey soils of fluid and fluid-plastic consistency, which often require reinforcement. In such cases, jet grouting or impregnation injection technology is used. Injection mixtures based on microcements are used for this purpose. The pa-per proposes compositions of injection mixtures using expanded clay dust. It is shown that expanded clay dust can be used as an active mineral additive in the injection compositions based on the microcements. It is established that the injection compositions on the basis of the microcement modified with the expanded clay dust have the best efficiency at fixing clay soils, as the sizes of their particles are comparable with the sizes of the particles of the microcements and the expanded clay dust.
Keywords:
filtration consolidation, initial head gradient, soil consolidation, expanded clay dust, microcement
filtration consolidation, initial head gradient, soil consolidation, expanded clay dust, microcement
