In-situ investigations as a basis for development of a procedure for calculation of the stress-strain state of a soil mass during installation of substructures

2011 ◽  
Vol 48 (4) ◽  
pp. 129-137
Author(s):  
V. M. Ulitskii ◽  
A. G. Shashkin
Keyword(s):  
Strain State ◽  
Soil Mass ◽  
Stress Strain ◽  
Stress Strain State

scholarly journals ON ONE NUMERICAL METHOD FOR THE COMPUTING OF SEDIMENTATION OF THE SURFACE OF THE SOIL MASSIVE CAUSED BY THE CONSTRUCTION OF THE SHELL LINING OF THE TUNNEL

2018 ◽  
Vol 14 (1) ◽  
pp. 78-91
Author(s):  
Sergey B. Kosytsyn ◽  
Vladimir Y. Akulich
Keyword(s):  
Analytical Solution ◽  
Numerical Method ◽  
Strain State ◽  
Soil Mass ◽  
Stress Strain ◽  
Stress Strain State ◽  
The Earth ◽  
Surrounding Soil

The distinctive work is aimed at the geotechnical forecast of the influence of the construction of the tunnel on the change in the stress-strain state of the surrounding soil mass, namely, the precipitations that arise on the surface of the earth. The work assumes both a numerical and an analytical solution with subsequent com-parative analysis

scholarly journals NUMERICAL DESIGN OF FRAME BUILDINGS TAKING INTO ACCOUNT THE GENERALIZED STIFFNESS AND LOAD OF SOIL AND FOUNDATION

2019 ◽  
pp. 34-46 ◽  
Author(s):  
E. Kuzhahmetova
Keyword(s):  
Pile Foundation ◽  
Strain State ◽  
Soil Mass ◽  
Reference Points ◽  
Industrial Building ◽  
Stress Strain ◽  
Building Model ◽  
Stiffness Coefficients ◽  
Stress Strain State ◽  
Definition Of

The article is devoted to the improvement of methods for calculating buildings as large finite element systems and implements approaches that provide a definition of the overall picture of the stress - strain state of a designed building (structure) in parts, including its structural units and a pile foundation. The article contains a description of the methodology, the essence of which is to bring the stiffness of the pile foundation in the form of single piles (for example, under the columns of a frame of a public, residential or industrial building) and the adjacent soil mass, to the supporting points of interaction of the piles with the building. Generalized stiffness coefficients of the pile, obtained taking into account the soil with different deformation characteristics, are entered into the general matrix of the building for the subsequent determination of its stress - strain state and stability. At the final stage of moving the reference points of the building, it is possible to calculate the characteristics of the stress - strain state of the pile in the ground. In this article (part 1), the generalized stiffness coefficients of the pile are obtained taking into account the types of soil (sand and clay) with physical and mechanical characteristics selected from regulatory documents. The calculations are performed using the FEMAP with NX NASTRAN software package. The material on the structuring of the building model is supposed to be published in the subsequent parts of this article

scholarly journals MODELLING OF THE EFFECTS OF THE ENVIRONMENTAL-GEOPHYSICAL STATE OF SOILS ON ENGINEERING BUILDING OBJECTS

2020 ◽  
pp. 97-103
Author(s):  
Yu. Starodub ◽  
A. Havrys ◽  
O. Kozionova
Keyword(s):  
Strain State ◽  
Mathematical Formulation ◽  
Soil Layer ◽  
Soil Mass ◽  
Negative Influence ◽  
Stability Study ◽  
Bridge Engineering ◽  
Stress Strain ◽  
Engineering Structures ◽  
Stress Strain State

The article deals with the method of the reaction modelling of soil strata under engineering objects to ecological and geophysical state in the problems of studying the negative influence of loads on a stress-strain state of soil under engineering objects. The problem of stability study is considered and the behaviour of soil in a vicinity of bridge-engineering structures is investigated. To solve the problems of emergency protection, a method of modelling the reaction of the soil layer under the load on the engineering objects due to tectonic influences to study the stress-strain state of the ground crust in a vicinity of engineering objectsis used. An algorithm of the finite element method in the problem of studying the stress-strain state of soil base under engineering objects has been developed. The physical and mathematical formulation of the problem is carried out. The modelling problem is solved by test cases. Models of continuous environment of functioning engineering structures for which stress-strain characteristics of the soil massif modelled are developed. The theoretical definition and modelling of critical values of the stress-strain state of the soil mass under the influence of loads are carried out. Modelling allows to predict the nature of the influence of mechanical processes on the ecological and geophysical state of the environment and to study the stability of engineering structures. Stress-deformation processes of the rock massif are investigated, as a result of which emergencies of natural and man-made characters can arise.

scholarly journals ESTIMATION METHOD AND EXPERIMENTAL INVESTIGATION OF STRESS-STRAIN STATE FOR TENSILE RC INCLUDING ASSESSMENT OF SHRINKAGE AND NON-LINEAR STRAINS

1995 ◽  
Vol 1 (3) ◽  
pp. 30-57
Author(s):  
E. Dulinskas
Keyword(s):  
Reinforced Concrete ◽  
Strain State ◽  
Estimation Method ◽  
Careful Examination ◽  
Physical Parameters ◽  
Stress Strain ◽  
Stress Strain State ◽  
Water Cleaning ◽  
Non Linear

In this paper, a stress-strain state is analysed for hardening reinforced concrete due shrinkage, increase of physical parameters and non-linear strains of concrete. A method has been developed for assessment of initial stress-strain for reinforced concrete specimens subjected to short-term loading. Stresses and strains in reinforcement and concrete are estimated by experimental-theoretical method and σ—ε diagram for tensile concrete including the descending branch is defined. Experimental investigations of tensile reinforced and non-reinforced members have been carried out for defining the descending part of σ—ε diagram. Sufficient agreement of experimental and predicted data have been achieved. The method and results of these investigations have been applied for design and building of water cleaning equipment made from cast-in-situ and pre-cast concrete. Stress-strain state of structures has been determined for different stages of construction and each of them the required technology has been chosen. Careful examination of structures of the buildings built allows to conclude that the above method can used for calculation and design of cast-in-situ and pre-cast reinforced concrete structures.

scholarly journals The impact of Outer Western Carpathian nappe tectonics on the recent stress-strain state in the Upper Silesian Coal Basin (Moravosilesian Zone, Bohemian Massif)

2012 ◽  
Vol 63 (1) ◽  
pp. 3-11 ◽  
Author(s):  
Jiří Ptáček ◽  
Radomír Grygar ◽  
Petr Koníček ◽  
Petr Waclawik
Keyword(s):  
Bohemian Massif ◽  
Strain State ◽  
Stress Fields ◽  
Coal Basin ◽  
Stress Strain ◽  
Stress Strain State ◽  
Nappe Tectonics ◽  
Upper Silesian Coal Basin ◽  
The Impact

The impact of Outer Western Carpathian nappe tectonics on the recent stress-strain state in the Upper Silesian Coal Basin (Moravosilesian Zone, Bohemian Massif) The Upper Silesian Coal Basin (USCB) represents a typical foreland basin developed during the Variscan orogenic phase of the Late Carboniferous. Later, during the Alpine orogeny the Outer Western Carpathian nappes were thrust over the post-Variscan foreland, to which the USCB belongs. Due to this complex tectonic history, redistribution of stress fields occurred in the post-Variscan basement. Furthermore, post-Variscan denudation processes probably also contributed to recent stress regimes. Nevertheless, the impact of the West Carpathian orogeny can be regarded as the most significant influence. The in-situ measurement of recent stress fields in deposits of the Karviná Formation of the USCB and structural analysis of the Czech part of the USCB, has focused on verification of the structure and stress interference of the Carpathian nappes and post-Variscan foreland basement. In the southernmost part of the Karviná Subbasin, the easternmost domain of the USCB, situated in the apical zone of the Variscan accretionary wedge, hydrofracturing and overcoring stress measurements have been recorded in coal seams from selected coal mines. The data have been supplemented by interpretation of focal mechanism solutions of mine induced seismic events. Measurements of recent in-situ stress regimes in the Karviná Formation of the USCB indicate a dominant generally NW-SE orientation of the maximum horizontal compression stress. The results demonstrate that the stress-strain regime in the Karviná Formation in the Variscan Upper Carboniferous basement is significantly influenced by the stress field along the Outer Western Carpathian nappes front. Besides improving our understanding of recent regional stress fields within an area of mutual structural-tectonic interference by both the Variscan and Alpine orogenies, the measured data may contribute to more optimal and safer mining activities in the coal basin.

scholarly journals THE REDISTRIBUTION OF THE HEIGHT RETAINING WALLS LEVELS, ITS EFFECT AT THE STRESS-STRAIN STATE OF THE SYSTEM «RETAINING STRUCTURES – SOIL MASS»

2017 ◽  
Vol 2 (49) ◽  
pp. 186-194
Author(s):  
L. O. Skochko
Keyword(s):  
Strain State ◽  
Sandy Loam ◽  
Retaining Wall ◽  
Retaining Walls ◽  
Soil Mass ◽  
Structural Elements ◽  
Stress Strain ◽  
Stress Strain State ◽  
Characteristic Points ◽  
The Relationship

The work of multi-level retaining walls in sandy loam soils is investigated. A numerical experiment was conducted for reveal the most rational choice of the level height at a constant total excavation depth. A three-level retaining wall is considered. A number of tasks have been solved. The depend values changing of displacement and internal effort on the redistribution of excavation levels is shown. Values are fixed in the characteristic points of the structural elements of retaining walls each level. Variables are different at level marks of retaining walls. The surfaces were created on bases of the obtained results. These surfaces are used to analyze the relationship between the heights of levels and the values of bending moments. Identified solutions lead to increased displacements in one or another level of retaining walls. The constitutive laws between the geometric parameters of the retaining walls and the stress-strain state of the system «retaining constructions – soil mass» are obtained.

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