scholarly journals Improvement of settlement calculations of building foundations by increasing the reliability of determining soil compressibility indices

2019 ◽  
Vol 1 (52) ◽  
pp. 115-123
Author(s):  
Yuriy Vynnykov ◽  
Muhlis Hajiyev ◽  
Aleksej Aniskin ◽  
Irina Miroshnychenko
Keyword(s):  
Soil Compaction ◽  
Deformation Modulus ◽  
Summation Method ◽  
The Body ◽  
Soil Deformation ◽  
Deformation Parameters ◽  
Complex Approach ◽  
Magnitude Variation ◽  
Soil Compressibility ◽  
Soil Compression

Ways to improve the methods of calculating the foundations bases’ settlements by increasing the reliability of determiningthe soil compressibility indices are substantiated. The complex approach to refinement of the buildings bases' settlements calculationby the layer summation method is investigated by accounting for the soil deformation modulus variability in the fullpressure range perceived by the base at loading; soil strength coefficient βZ; soil deformation anisotropy by elastic orthotropicmodel; tendencies to magnitude variation in the soil deformation modulus in depth of the body under the foundations andwithin the artificial bases built with the soil compaction. There was also proved the possibility of increasing the accuracy ofthe predicting method for the buildings' foundations base settling using the soil compression index and accounting for thepressure effect on the soil deformation parameters in depth of the compressible strata.

scholarly journals Increasing the Accuracy in Determining the Basis Foundation Compressibility

2018 ◽  
Vol 7 (3.2) ◽  
pp. 209
Author(s):  
Nataliia Kostochka ◽  
Iryna Miroshnychenko ◽  
Oleksandr Nalyvayko
Keyword(s):  
Soil Sample ◽  
Prediction Accuracy ◽  
Soil Deformation ◽  
Compression Tests ◽  
Lateral Expansion ◽  
Deformation Parameters ◽  
Compressibility Index ◽  
Porosity Coefficient ◽  
Soil Compressibility ◽  
Relative Change

The disadvantages of the standard soil deformation characteristics are analyzed. Impact of different factors on the determination accuracy of soil characteristics is estimated. Devices to determine soil deformation parameters in the conditions of one axial compression aimed at increase in reliability of the soil compressibility evaluation results are improved; the mentioned improving eliminate disadvantages of the compression device that is absence of the soil sample lateral expansion and friction with ring walls decreasing the soil sample lateral expansion and reduces real soil compressibility. Results of the soil tests in the standard and improving device are compared with each other. Soil compressibility index is based. Such index represents the relative change in the soil sample porosity coefficient during the compression tests. There is increase in prediction accuracy of the building soil foundations settlements. To increase prediction accuracy soil compressibility index and account of the influence of pressure on the soil deformation parameters and soil porosity changing from the compressible thickness depth are used. Statistical analyze of the random variables of the soil base settlements, which are predicted by the both methodic are made.  

A device for the in situ determination of soil deformation modulus

1995 ◽  
Vol 32 (4) ◽  
pp. 199-204 ◽  
Author(s):  
Ravi Godbole ◽  
Ralph Alcock
Keyword(s):  
Deformation Modulus ◽  
Soil Deformation

scholarly journals Effect of the dewatering on the surrounding terrains during the construction of Metrostation 9-III of the Sofia Metropoliten

2021 ◽  
Vol 82 (3) ◽  
pp. 207-209
Author(s):  
Ina Bojinova-Popova
Keyword(s):  
Hydraulic Conductivity ◽  
Deformation Modulus ◽  
Soil Deformation ◽  
Soil Hydraulic Conductivity ◽  
Soil Hydraulic

The international practice often faces significant settlements of terrains and structures due to dewatering. This study presents of the dewatering impact during the construction of Metrostation 9-III from the Sofia Metropoliten on the surrounding terrains and buildings. The subsidences are quantified for specific values of the soil deformation modulus and varying values of the soil hydraulic conductivity.

scholarly journals Settlement Computation of Homogeneous Base

2020 ◽  
Vol 23 (6) ◽  
pp. 90-98
Author(s):  
E. G. Pakhomova ◽  
O. I. Kutsenko ◽  
A. S. Morozova ◽  
A. R. Timokhina
Keyword(s):  
Critical Analysis ◽  
Soil Layer ◽  
Deformation Modulus ◽  
Summation Method ◽  
Layer By Layer ◽  
Average Pressure ◽  
Underground Structures ◽  
Regulatory Documents ◽  
Foundation Base ◽  
Sufficient Degree

Purpose of reseach. This article proposes the development of a new methodology for determining the settlement of a homogeneous foundation base on the basis of the layer-by-layer summation method, which reduces the amount of calculations performed.Methods. The boundary of the compressible stratum can be determined graphically from the condition that the additional stresses are equal to half the natural stresses. Knowing the value of the depth of the compressible stratum, we can determine the total value of the coefficients included in the well-known formula for calculating the settlement of the base by the method of layer-by-layer summation. Having determined the value of the specified coefficient in the layer located directly below the base of the foundation, we introduce the coefficient Kα, which reflects the proportion of sediment in the layer under consideration.Results. The application of the developed coefficient Kα allows determining the base settlement by calculating the deformations of one soil layer located directly below the base of the foundation, which greatly simplifies the design of underground structures. As an example, we consider a foundation, the average pressure under the sole of which is 1200 kPa, the laying depth d = 2 m, the base is homogeneous with a deformation modulus of 20 MPa and a specific gravity of γ = 18 kN / m3. The settlement of the building-basement system was calculated by the method of layer-bylayer summation and the critical analysis of the results was performed. When calculating precipitation by the method of layer-by-layer summation according to the known formulas given in SP 22.13330. 2016 “Foundations of buildings and structures”, it was obtained a draft value of 9 cm. When calculating the base deformations according to the proposed method, the boundary of the compressible thickness Hc = 5.7 m was graphically determined. The coefficient value was 0.203, and the draft was 9 cm.Conclusion. The settlement values determined in accordance with current regulatory documents and the developed methodology are the same, which allows us to conclude that the proposed method has a sufficient degree of reliability and can significantly facilitate the process of determining the deformations of the base of buildings and structures.

Substantiation of the Method for Calculating Soil Deformation Modulus

2021 ◽  
pp. 71-81
Author(s):  
Aleksandr Kalinin ◽  
Aleksandr Prolygin ◽  
Natalya Aleksandrova
Keyword(s):  
Deformation Modulus ◽  
Soil Deformation

The Weakening of Ideological Influences upon Soviet Design

Slavic Review ◽  
1968 ◽  
Vol 27 (1) ◽  
pp. 71-84 ◽  
Author(s):  
Raymond Hutchings
Keyword(s):  
Communist Party ◽  
Fine Arts ◽  
The Body ◽  
Detailed Consideration ◽  
Extended Treatment ◽  
Visual Form ◽  
Complex Approach ◽  
Present Context ◽  
Soviet Ideology ◽  
Definition Of

In this Article I shall examine the visual form or appearance (shape, size, and other visible qualities) of Soviet socially produced things (excluding any detailed consideration of trends in the fine arts or of individual craftsmanship) in relation to forces in Soviet ideology which seem to have influenced this form or appearance. (I do not attempt to describe all influences which bear on Soviet design, which would require a much more complex approach and a more extended treatment.) My definition of Soviet “ideology” would be the same as Professor Meyer's: the body of doctrine that is taught by the Communist Party to all Soviet citizens. Whether or not this doctrine is true, or thought to be true, as well as why it is propagated, or whether this would be a complete definition—these questions are considered to be irrelevant in the present context.

Procedure for Assigning a Soil Deformation Modulus of Large-Sized Slab and Slab-Pile Foundations Bases

2019 ◽  
Vol 56 (5) ◽  
pp. 340-345
Author(s):  
A. V. Samorodov ◽  
V. L. Sedin ◽  
O. V. Krotov ◽  
S. V. Tabachnikov
Keyword(s):  
Deformation Modulus ◽  
Pile Foundations ◽  
Soil Deformation

Application Research of Compaction Pile in Heavy Collapsible Loess

2011 ◽  
Vol 90-93 ◽  
pp. 1390-1393 ◽  
Author(s):  
Yong Qiang He ◽  
Yan Peng Zhu ◽  
Yun Wu ◽  
Xiao Qing Wang
Keyword(s):  
Soil Compaction ◽  
Composite Foundation ◽  
Application Research ◽  
Loess Area ◽  
Foundation Treatment ◽  
Collapsible Loess ◽  
Expansion Theory ◽  
Soil Compressibility ◽  
Cavity Expansion Theory ◽  
Physical Mechanics

Compaction piles is one of the conventional methods for foundation treatment in collapsible loess, there are very few research results about soil compaction effect between piles when forming the piles. Firstly, the stress field and displacement field of soil around compaction piles are elastic-plastic analyzed on the basis of the cavity expansion theory; then a series of field and laboratory tests were performed to evaluate the treatment effect of the compaction pile composite foundation. The result shows that the collapsibility has been eliminated, all physical mechanics indexes have been improved, and soil compressibility and modulus of compressibility are also increased remarkably. It embodies the correctness of the computation theory. And the feasibility of the compaction piles composite foundation on collapsible loess area is further proved.

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