An important rule of creep of clay soils under shear

Meschyan, S. R.; Badalyan, R. G.

doi:10.1007/bf01703035

Cited by 2 publications

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“…It is noteworthy that in many cases these curves, determined using the new rheological equation (Formula ( 5)), coincided with the curves obtained as a result of laboratory testing conducted by different researchers [2,[18][19][20][21][22][23]27]. It is also important that these curves were drawn using the same rheological parameters (α, β, a and b).…”

Section: ν-Poisson 'S Ratiosupporting

confidence: 67%

“…m = 1; h-depth of the estimated area; ν-Poisson 's ratio According to the results of clay soils tests, conducted by S.S. Vyalov, S.R. Meschyan and others [2,21,22] (see Figure 2), the diagram of non-reducing creep deformations is typical for soils having rheological properties and subjected to high stresses with long-term loading (see Figure 3).…”

Section: Methodsmentioning

confidence: 99%

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Mathematical Computations of Long-Term Settlement and Bearing Capacity of Soil Bases and Foundations near Vertical Excavation Pits

Ter-Martirosyan

Vanina

2022

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The present paper describes and provides an analytical solution for the problem of evaluating the settlement and load-bearing capacity of weighty soil layers of limited thickness resting upon incompressible soil bases and an excavation pit wall, upon exposure of the foundation to a distributed load in the vicinity of a wall. The authors developed a method for determining the stressed state component in the reduced engineering problem based on the Ribere–Faylon trigonometric series, accounting for the nonlinear deformation properties of soils. To determine the settlement over time of the foundation near the pit, we used the A.Z. Ter-Martirosyan’s model to describe shear deformations and the Kelvin–Voigt model to describe volume deformations, assuming that ε·z(t) = ε·v(t) + ε·γ(t), according to the Hencky’s system of physical equations. The obtained solutions make it possible to assess the long-term deformation of soil bases and the long-term load-bearing capacity with respect to nonlinear rheological properties in a way that accurately corresponds to the actual performance of subsoils exposed to loading. The theoretical results were followed by numerical experiments to prove their validity.

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Section: ν-Poisson 'S Ratiosupporting

confidence: 67%

Section: Methodsmentioning

confidence: 99%

Mathematical Computations of Long-Term Settlement and Bearing Capacity of Soil Bases and Foundations near Vertical Excavation Pits

Ter-Martirosyan

Vanina

2022

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Long-term settlement and bearing capacity of foundations adjacent to vertical excavation at various parameters of soil viscosity

Ter-Martirosyan

Vanina

2022

Vestnik MGSU

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Introduction. When the underground part of a high-rise building interacts with the surrounding soil massif behind the excavation pit, a complex heterogeneous stress-strain state occurs, transforming in space and time — during construction and during the exploitation of the building. Special issues arise when the soil massif is heterogeneous and has rheological properties, and an additional load acts near the pit excavation at the same time. Materials and methods. For the problem of the stress strain statement of soil with a weight behind the enclosure of a pit with a depth h, taking into account the influence of a distributed load q = const with a width b = 2a at a distance c from the edge of the enclosing structure of the pit, the stress components were obtained using a solution based on the Ribier – Filon trigonometric series. To determine the settlement over time of the foundation near the pit, the A.Z. Ter-Martirosyan’s model was used. To describe shear deformations and the Kelvin – Foigt’s model was used to describe volume deformations, assuming that ε.z(t) = ε.v(t) + ε.γ(t), according to the Henky’s system of physical equations. Results. An analytical method has been developed for quantifying the settlement of soil bases and foundations of nearby buildings behind the pit over the time. The graphs of the settlement-time with double curvature, as well as the graph of the long-term stability of the base are obtained. Conclusions. The solutions obtained can be used to determine the long-term settlements and bearing capacity of the foundations of buildings and structures with rheological properties near the pits. The selected geomechanical model of the foundation (its geometric parameters, initial and boundary conditions), as well as the computational model of the soil (linear, nonlinear and rheological) and the type of physical equations (Hooke system or Henky system), significantly affect the type of the settlement-time curve (S–t), as well as the bearing capacity of the soils. Collaborative using of A.Z. Ter-Martirosyan’s rheological model and Kelvin – Foigt’s rheological model makes it possible to obtain settlement-time graphs with double curvature, as well as a graph of the long-term stability of the soil base.

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An important rule of creep of clay soils under shear

Cited by 2 publications

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Mathematical Computations of Long-Term Settlement and Bearing Capacity of Soil Bases and Foundations near Vertical Excavation Pits

Mathematical Computations of Long-Term Settlement and Bearing Capacity of Soil Bases and Foundations near Vertical Excavation Pits

Long-term settlement and bearing capacity of foundations adjacent to vertical excavation at various parameters of soil viscosity

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