The article presents an analysis of the requirements for quality control in the current regulatory documentation of the Russian Federation and the experience of developing a scheme of operational quality control (SOQC) for the installation of sheet metal waterstops, obtained on the basis of regulatory and methodological documentation and materials from manufacturers of waterproofing materials: domestic and foreign, and the practice of using polymer and metal waterstops and our own experimental studies. The content of the main information blocks of the SOQC in the practically accepted unification of requirements for quality control in construction is described. Construction defects are indicated when using polymer waterstops for waterproofing technological seams of monolithic structures of civil buildings, which can be avoided if the requirements are met and the work is performed in accordance with the developed SOQC as part of the technological map of the work production project.

Keywords: scheme of operational quality control, quality in construction, installation tolerance, requirements, sheet metal waterstop

The study is aimed at studying the corrosion processes of a metal waterstop inside technological seams in order to ensure its tightness and maintain performance qualities, since if corrosion occurs, the waterstop may lose its functional properties, which can lead to groundwater leaks. At the moment, there is no single source containing a complete set of information on corrosion processes in relation to metal waterstops, which leads to design errors, since it is extremely difficult to make the correct choice of metal waterstops, because it is impossible to analyze data and determine the parameters that determine the corrosion rate of metal waterstops in the technological concreting seam, it is necessary to take into account a large number of parameters related to the study of groundwater.

Keywords: waterproofing, technological seam, metal waterstop, corrosion processes, concrete, waterproofing system, ground water, carbonization, galvanized waterstops, copper waterstops, stainless steel waterstops

In this paper, we consider the application of the optical heterodyning method for signal processing of a receiving device. The simulation of the developed scheme was carried out in the environment of OptiSystem. Also presented are the results of modeling, explaining the principle of operation of this scheme.

Keywords: optical heterodyning, radio frequency, L-band, signal spectrum

The developed calculation dependencies for determining the log truck movement indicators during non-steady and steady motion in different modes make it possible to solve technical-economic tasks with adequate accuracy and certainty during planning and optimization of wood transportation. During two-stage timber hauling a log truck based on MAZ-6312B9 has advantages in exploitation and technical-economic indicators in comparison with a log truck based on Scania R-420. There are opportunities for a rapid increase of passing ability of a log truck while using an active trailer. This provides the work of a complete log truck on a forest road, and also there is a possibility to eliminate two-stage timber hauling, with rise of efficiency and technical-economic indicators

Keywords: wood transport, optimization, log trucks, motion simulation, efficiency

One of the problems with exploitation of log trucks is damage to equipment during the process of transportation of wood material and during loading-unloading operations. The authors of the paper suggest equipping a log truck with an innovative protective butting device in order to increase reliability and work efficiency of the hydraulic manipulator. This device will allow aligning the sawn wood ends of wood products, and thus it will allow excluding a chance of protruding of sawn wood ends at an inadmissible scale which prevents forming a neighboring pack of wood products. The device will also allow excluding mechanical damages of a hydraulic manipulator by sawn wood ends of wood products being laid on a load platform. This will increase its reliability and will reduce the expenses on repair works.

Keywords: log truck, hydraulic manipulator, modernization, reliability, safety

The paper describes and analyzes the main development trends of Russian forestry machine-building in modern conditions. Russian forestry machine-building enterprises do not use presently available perspectives in import substitution in connection with the depreciation of the rouble. Neither do they use the opportunities for producing integrated multifunctional machines. Development and production release of forestry machines for assortment harvesting based on Russian-manufactured tractors fitted with technological equipment of foreign manufacture is the first step on the way of creating domestic vehicles of analogous purpose. These machines will be fully complete with home-produced technological equipment. This will allow reducing the costs on the production of these machines and on their timber-harvesting operations

Keywords: forest harvesting technology, felling, limbing, cutting into lengths, skidding, forestry machine-building, development

One of the main tasks when organizing workflows of logging transport is the choice of log truck optimal type for logging under specific operation conditions. The method proved by the authors and engineered modelling program of log trucks traffic parameters give an opportunity to accomplish engineering tasks of the choice of logging transport type to operate under various natural-industrial conditions for certain. The example of the log truck optimal type choice is given.

Keywords: logging transport, grade computations, traffic parameters, performance, import substitution

In article it is shown that search of patentable decisions for centrifugal dehydration of wood materials is intensified. The design of basic knots of the device for centrifugal drying of forest products directed on clearing of vibration loadings is considered

Keywords: forest products, dehydration, centrifugal drying

The article gives IT-companies and their software products review in the field of engineer analysis and calculation. The importance and intensive development of this sphere IT-companies through their works and service refining, that facilitates their new market segments introduction, is shown.

Keywords: CAE, engineering, intellectual property, IT-technology, software products, CAD

The results of a patent search in the field of quality improvement of main piping valve gate’s sealing faces for the plants of nuclear power, thermal power and oil and gas industries are given

Keywords: valve gate, wedge valve, main piping, patent search, sealing face

The results of analysis of engineering solutions with main piping’s wedge valve design for the plants of nuclear power, thermal power, oil and gas industries, based on the realized patent search, are given. The tendencies of engineering solutions development for wedge valve design are identified

Keywords: valve industry, pipeline valve, shut-off valve, wedge valve, main piping

The article suggests improvement of increment borer construction by means of installing a ratchet into its handle. The suggested technical solution will allow increasing the efficiency of work with a borer while taking core of wood.   

Keywords: Increment borer, preparatory works of forest logging, tree age, ratchet, core.