The present paper substantiates the relevance of the scientific and technical task of designing effective helical pile constructions under conditions of insufficient development of existing standards. An adapted computer design technique was developed on the basis of comparison and analysis of the calculation results and field tests for multi-helix helical piles in cohesive and cohesionless soils using

We performed a series of small-scale physical modeling tests on two types of multiple ball-shaped nodular underreamed anchors under vertical uplift loading conditions using transparent soil and particle image velocimetry. Three sets of numerical investigations were also carried out to study the effect of anchor structure parameters on uplift bearing capacity. The results show that a larger ball diameter

The paper discusses specifics of R&D support of designing and constructing the foundations of the football (soccer) stadium in Rostov-on-the Don, as well as results of geotechnical monitoring during construction and operation.

The paper discusses the authors-developed technology for constructing offshore waterproof steel sheet pile cofferdams for creating artificial islands. The proposed technology enables increased efficiency and reduced work completion times.

The effectiveness of applying granular foam glass ceramics to protect a roadbase from seasonal freezing is demonstrated. Observational results of the base temperature regime are presented along with a comparative assessment of risk zones characterizing the depth of freezing and possibility of intense frost heaving.

It is necessary to consider the influence of the actual soil voltage distribution when establishing the consolidation equation to more realistically reflect the soil consolidation conditions during the vacuum preloading and electroosmosis process. The distribution of the soil voltage is analyzed by integrating previous results with independent experimental findings. The equation for the dissipation

There are many factors affecting the stability of cut and fill multistage slopes, and these factors exert different degrees of influence on slope stability. The grey incidence analysis method can be used to evaluate the sensitivity of these factors. To overcome the shortcomings of the grey incidence analysis model used in previous sensitivity analysis studies on the factors influencing slope stability

In order to investigate the influence of granulometric and material composition on rheology, in this study an improved direct shear creep apparatus is used to conduct shear rheological tests on sandy soil samples of different granulometric compositions and water contents. Creep curves for different shear load levels, as are the average viscosity coefficients of soils based on the experimental data

In this study the vertical swelling pressure in disturbed expansive soil was evaluated under constant-volume hydration swelling tests. The volume change during inundation was observed under two conditions: constant vertical stress at inundation and constant volume. A swelling stress-strain relationship model of compacted expansive soil is established under a one-dimensional axial load, which is related

We investigated the strength and deformation characteristics of undisturbed unsaturated loess under different moisture content conditions. The results showed that the deviatoric stress intensity increases with the increase of confining pressure at the same moisture content and decreases with increasing moisture content at the same confining pressure. Moreover, the matric suction and the shear strength

Calculation of the bearing capability of piles in a pile field, based on the calculations and tests of single piles, taking into account their interaction with each other through the soil ground, is proposed. Differences in the operation of a single pile from a pile in a group are shown. The main attention is paid to determining the dependence of the ultimate resistance of piles on the parameters of

The aspects of determining the moduli of unloading and reloading of dispersed soils were considered. Sample tests involving triaxial compression devices showed that these parameters depend on the stress-strain state. The ratios between the primary loading and reloading moduli accepted in design practice were significantly underestimated, which led to errors in determining the settlement of structures

To explore the factors affecting the shear strength of compacted loess, direct shear tests and compression tests under different moisture contents and compaction were conducted. The results show that the angle of internal friction and the cohesion of the soil depend on the moisture content and compaction. The influence of the moisture content is more significant than that of the compaction. The relationship

The data of the uniaxial compression tests of limestone samples with the registration of the strain gauge data and parameters of acoustic emission and thermoradiation signals are presented. A joint analysis of the experimental time dependencies of the variations of mechanical and physical parameters is performed. The identification methods of the deformation stages of the test samples are considered

The problem of improving foundation bases in strongly deformable and structurally unstable soils is examined. A design is proposed for a sand cushion reinforced with horizontal geosynthetic elements. The results of the operation of the proposed structure with basal soil as well as approaches to determining the maximum resistance force and the deformation of a base improved by such a structure are presented

This paper discusses the comparative study of design moments for pile cap with conventional methods and finite element analysis. If a detailed finite element analysis is adopted, flexibility of the pile cap is considered. When a pile cap is designed by truss analogy, 80% of the tension reinforcement is concentrated in the region where the cap is supported on piles and at the column, which depends on

Modern theoretical and technological trends in the development of static penetration tests are investigated.

Design calculations of the modulus of deformation of non-dilatant argillaceous (clay) soil based on the theoretical solution for a head resistance of a sounding device are presented. The results of calculations for the data of static sounding are compared with those taken as standards of the Russian Federation; a completely satisfactory correspondence is shown.

Given the complexity of the tests and the ambiguity of the experimental and calculated estimates of the pile load capacity of collapsible soils, a method for determining it is proposed on the basis of the results of tests of soils with natural moisture content without insulation of piles within the collapsible thickness. The method decreases the cost and time of testing and increases the accuracy of

This paper presents an experimental investigation of the deformation characteristics of salt rock under different loading conditions. A simple empirical model for the evolution of fatigue deformation is proposed. The results clearly show that the fatigue deformation is strongly dependent on the applied frequency, stress, and loading rate. The higher the loading frequency, loading rate, and stress amplitude