Bulletin of Prydniprovs'ka State Academy of Civil Engeneering and Architecture

19-24

Authors: V. L. Sedin, V. Yu. Ul’yanov, E. A. Bausk, Ya. V. Ul’yanov

Problem statement. Nowadays the survey organizations need in facilities of light type not being produced mass.But they are necessary for the accelerated testing of soil with the possibility of use in cramped conditions. Described below probe and test procedures is one of the possible solutions to this problem. Purpose. To acquaint with a description of the constructional features and testing methods of soil dynamic universal probe, developed in the laboratory of research of nuclear and thermal power plants (LRNTP) of Pridneprovsk scientific and educational institution of innovative technologies in construction. Conclusion. The proposed probe intended to determine the mechanical properties of soils and allows to provide the express assessment of the soil properties of natural foundations to explore the changes of the properties of soil foundation under the operative objects in the process of their operation. Universal feature of the probe is the possibility to use disposable standard cones and of the composite construction of hammer (if it is necessary to reduce the weight of the hammer). As well as the possibility of carrying out tests on foreign standards, in particular on standard for the SPT (Standard Probe Test). Results of probing are drawn up as a standard continuous step schedule of change of depth value of conditional dynamic resistance of soils Pq, followed by averaging schedule and calculating of weighted index of probing for each layer land constructions. This probe and the following technique, fill a niche of the lack of manual small facilities and can contribute to the expansion of technical capabilities of survey organizations.

32-36

Authors: A. S. Ishutina

Raising of problem. Reliable results of geodetic monitoring depends on several factors. One of the main factors is reliability of geodetic points taken as the source for the creation of geomonitoring network. According to the current normative documents for the creation of horizontal and vertical geodetic networks, the stability of the geodetic points should be determined by the results of periodic monitoring of their coordinates. As practice shows this is not enough, because geodetic reference points simultaneously offset with the monitoring object. Therefore, the assessment of source reliability and systematic control of the base points of geomonitoring network are important. Purpose. To increase the reliability of results of geodetic monitoring which based on the use of stable reference geodetic points. To develop probabilistic intervals of errors of determination of coordinates of geodetic points of various classes based on which we can judge their offsets in the selection of a stable geodetic points. Conclusion.By sampling stable reference geodetic points on the interval estimates of the errors of the coordinates with a given level of reliability and defining the mode of their control, you can create a reliable geodetic monitoring network. Using this network for geodetic monitoring of engineering facilities will allow us to obtain reliable, valid observation results.

46-54

Authors: V. О. Voronin, E. V. Lyantse

Raising of problem. The current state of the real estate market is characterized by high inflation and a significant devaluation of national currency. In markets with mixed prices impact of devaluation and inflation against the foreign currency have most complex nature and usually leads to slower growth in prices in local currency and partial de-dollarization of the market. Provided that the value of the real estate market is denominated in local and foreign currency, it is necessary to solve the problem of correspondence between these prices. With this condition must be satisfied that the market prices in local currency correspond to the state of the real estate market on the valuation date. Purpose. Development of the method, which should take into account the particular valuation procedures in determining the market value of the local currency in terms of the existence of high inflation and a significant devaluation. The study of this problem, especially for the markets of emerging economics, is an urgent and important task of applied economic analysis and, in particular, the theory and practice of evaluation as part of this analysis. Conclusion. To achieve this goal have been developed and used techniques and methods of applied economic analysis and, in particular, the theory and practice of evaluation as part of this analysis. Satisfactory agreement obtained values and the market rent rate, which are responsible of the real estate market in a significant devaluation of local currency, confirm the position that the correction in market conditions ("discount on the offer price" and "market conditions") must be done in determining the market value so and the market rent rate.

62-68

Authors: M. I. Netesa, D. V. Palanchuk

Raising of problem. Concrete advisable to obtain a low strength with local secondary resources for recycling and reduce the environmental burden on the environment. But it is important to design such concrete compositions with a reduced flow of cement. It is known that the coefficient of efficiency of use of cement in the concrete of the heavy and B10 is less than about 0.5, which is almost two times smaller than in class B15 concrete and above. Even lower coefficient of efficiency in light concrete cement low strength. Therefore, it is important to find patterns determining the composition of lightweight concrete based on local-products industry with more efficient use of cement in them. Purpose.. Based on the analysis of earlier research results, including with the use of methods of mathematical planning of experiments to determine the concrete contents, which can provide the requirements for the underlying layers of the floor, the compressive strength of which should correspond to the class B5. It is important to provide the required strength at minimum flow of the cement, which is the most expensive and energy-intensive part of concrete. Conclusion. Analysis of the test results of control samples of concrete in 28-day-old, the following laws. The required tensile strength of concrete compressive strength of 7.0 MPa can be obtained in the test range when used in formulations as a filler as the Dnieper hydroelectric power station fly ash and tailings Krivoy Rog iron ore YuGOK. To ensure providing the required characteristic strength of the concrete in the underlying layers of the floor is advisable to use a nominal composition per cubic meter of concrete: cement 160 kg granshlaka Plant named after Petrovsky, 675 kg of fly ash Dnieper HPP 390 kg, 400 kg of sand, 230 liters of water. Thus, while ensuring rational grain composition components can obtain the desired strength lightweight concrete based granshlaka plant Petrovsky, using as fillers tailings Krivoy Rog iron ore YuGOK or fly ash Dnieper TPP. In order to ensure the required strength lightweight concrete class B5 based on local-products industry enough cement to 150 kg per cubic meter of concrete.