Engineering and experimental testing of prototypes of biogas equipment

In connection with the reform of regulatory framework for construction sector of the Republic of Kazakhstan, the development of seismic zoning maps poses an urgent problem. The article presents a set of seismic microzoning maps of Almaty, developed on a new methodological basis for Kazakhstan, and provides explanatory materials on the development, understanding and use. Calculation of background seismic hazard was carried out in accordance with the basic provisions of Eurocode 8. Seismic microzoning included the implementation of two main tasks - the assessment of background seismicity and taking into account influence of soil conditions. Based on the analysis results, a set of maps have been arranged. When taking into account the influence of engineering and geological conditions, Russian and Kazakh works were used. The main maps ready for use in regulatory documents are provided. Analysis of capacities of the sediments of same age in different blocks made it possible to understand the dynamics of tectonic regime of the city territory. In the process of neotectonic activation, almost all previously existing tectonic disturbances were improved. In the contemporary relief of the urban area, most faults are not expressed.

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Seismic Micro Zoning of the Territory of Almaty on a New Methodological Basis

Sadykova¹,

Silacheva²,

Степаненко³

2021

“…On the inner contour, the opposite is true. In the gluing of the layers, the stresses have the same signs, but they break due to the different mechanical characteristics of the materials [22][23][24][25][26][27]. The stress pattern is symmetrical due to the symmetry of plate thickness.…”

mentioning

confidence: 99%

Bending of an Elastic Three-Layer Plate With a Hole Connected to the Soil Foundation

Старовойтов¹,

Журавков²,

Pronina³

2021

The relevance of this paper is explained by a demand for the development of mechanical and mathematical models and methods for calculating the stress-strain state of the sandwich structural elements. The statement of the boundary value problem on the deformation of a circular sandwich plate with a central hole, connected to the soil foundation, was given. To describe the kinematics of an asymmetric plate pack, the broken line hypotheses are accepted. In a relatively thick lightweight core, the normal does not change its length, remains rectilinear, but rotates through some additional angle. Tuff, coarse grained soil, granite, and gneiss are accepted as the soil foundation. The bearing reaction is described by the Winkler model. The system of equilibrium equations is obtained by the variational method. Its solution is written in displacements through Kelvin functions. A numerical parametric analysis of displacements and stresses in the plate is carried out, their dependence on the type of soil foundation is shown.

“…At the wastewater system, it becomes necessary to pump sludge from primary sedimentation tanks, as well as fine-grained sand from secondary sedimentation tanks. The lack of high speeds inside the screw pumps makes them promising for use as dredging pumps that drain rainwater into the collection network [11][12][13][14]. However, these pumps have not been widely used in the sewer industry [15][16][17][18][19].…”

mentioning

confidence: 99%

A Model for Calculating the Collection and Pumping of Rain and Melt Water in the Design of Multifunctional Buildings for Public and Industrial Purposes

Jakovlevs¹

2021

In drainage systems, it is often necessary to raise polluted rain and melt water to a low height. For example, pumping wastewater from one gravity collector to another, raising wastewater by several meters in order to reduce the deepening of the collecting sewer collector and, as a result, reduce capital costs for its construction. In such places, it may be more economically feasible to reduce such deepening. The novelty of the study is that the development of a drain can be fulfilled only if the filling of the throughput of the collectors is sufficiently ensured. The study shows that the possibilities of expanding collectors can be achieved based on compensation for energy consumption. The study outlined the necessity of allocating the device of a high-pressure pumping station with the subsequent laying of a pressure sewage collector to a common collector, or to the main sewer network, which in turn supplies rain and melt water to the main collector. The practical significance of the study is the widespread introduction of intermediate pumps of low pressure in sewerage networks is constrained by the lack of a sufficient range of reliable and economical low pressure pumps for contaminated liquids.