EXPERIMENTAL AND THEORETICAL BASES OF CALCULATIONS OF THE DEFORMATIONS OF DEEP FOUNDATIONS IN OVERCONSOLIDATED SOILS

2016 ◽  
Vol 4 (2) ◽  
pp. 45-48 ◽  
Author(s):  
Иван Лузин ◽  
Ivan Luzin ◽  
Завен Тер-Мартиросян ◽  
Zaven Ter-Martirosyan
Keyword(s):  
Stress State ◽  
Initial Stress ◽  
Deep Foundations ◽  
Soil Deformation ◽  
Soil Base ◽  
Initial Stress State ◽  
History Of ◽  
Overconsolidated Soils ◽  
Properties Of Soil

The paper presents the formulation and solution of the problem by quantifying precipitation of deep foundations (DF) considering the initial stress state of the soil base and state compaction, the history of its formation – taking into account nonlinear properties of soil deformation. It is shown that the inclusion of these factors has a significant impact on the SSC base of deep foundations, including sediment DF, i.e. to decrease it. Also shown that on SSC and on the quantity of foundation displacements of deep foundations is significantly affected by the ratio of the width and depth of the b/h.

Effects of Complex Initial Stress State Parameters on Dynamic Shear Modulus of Loess

2011 ◽  
Vol 243-249 ◽  
pp. 2601-2606 ◽  
Author(s):  
Zhi Jie Wang ◽  
Ya Sheng Luo ◽  
Hong Guo
Keyword(s):  
Stress State ◽  
Shear Modulus ◽  
Principal Stress ◽  
Initial Stress ◽  
Triaxial Tests ◽  
Dynamic Shear Modulus ◽  
Dynamic Shear ◽  
Initial Stress State ◽  
Foundation Soil ◽  
Stress States

The foundation soil of the buildings and structures is often in complex initial stress states. The dynamic torsional shear triaxial tests are carried out on undisturbed and remodeling loess under different complex initial stress states by using the remolded DTC-199 torsional cyclic load triaxial apparatus, and the effects of each complex initial stress state parameter on dynamic shear modulus of loess are discussed. Results show that, other conditions being the same, the influence of angles of initial principal stressα0on dynamic shear modulusGdof loess show a trend of the biggerα0is, the smallerGdis. The effect laws of efficient of initial intermediate principal stressb0onGdof loess are not obvious. When the dynamic shear strain is larger, the bigger initial deviator stress ratioη0is, the smallerGdof loess is. The influence of initial average principal stresspm0on loess is significant. The biggerpm0is, the biggerGdof loess is.Gdof undisturbed loess is greater than that of remodeling loess under the complex initial stress states.

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