Civil and Environmental Engineering | Open Access Articles

City Tarmita (Old Termez) In The Kushans’ Period, Mamatmusaev Tohir

The Scientific-Practice Journal of Architecture, Construction and Design

This article is devoted to results of expeditions that were explored by archaeological monuments of Chingiztepa and Karatepa in 2004-2005 yy. in the Old Termez.

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Problems And Ways Of Solution In Transit Of Automobile Transport Of The Republic Of Uzbekistan, Aziz S. Khalmukhamedov

Acta of Turin Polytechnic University in Tashkent

Maintaining the transit potential of a country is an integral part of the transport program of any country and vital for the economy. Unsatisfactory transit potential negatively affects the economy. Therefore, it is necessary to survey and establish indicators of the country’s transit potential. The determining factor of the country’s transit potential is the level and condition of the country’s highways. Thus, the indicator of the quality of the road - the flatness of the road - can become the main indicator that can be used for a generalized and quick assessment of the characteristics of the country’s transit potential. …

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Сharacteristics Mineral Resource Base Of Madagascar, A. E. Vorobyev, K. A. Vorobyov, S.A. Ndriambanuna, L.E. Schesnyak

Gorniy vestnik Uzbekistana

The main characteristics of the mineral resource base of Madagascar with details of coal, iron ore, non-ferrous metals, uranium, rare metals and gold are considered. In the gold-ore mineral base of Madagascar, coastal placers are of particular potential interest. Foreign mining companies and local crafts are described. The transition to the development of coastal gold placers is proposed

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A New Technical Solution For Cleaning The Water Intake Structure Of Pumping Stations From Siltation And Its Experimental Research, M.M. Mukhammadiev, S.R. Juraev

Irrigation and Melioration

The article considers one of the most pressing problems of pumping stations in the irrigation system today, their blurring of the bottom of the water intake (avancamera and water intake chambers), analyzes the existing proposals, designs and technical solutions and their advantages and disadvantages. Given the above advantages and disadvantages, a new design has been proposed for the treatment of water intake structures from turbid sediments with minimal energy and capital expenditures, very cheap and simple to operate and reliable. The design includes a turbid suction pump and a turbid pump, as well as a pulp pipeline. The pressurized water …

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Assessing Surface Water Features Using Landsat-8 Oli And Sentinel-1 Satellite Images Case Study Sirdaryo Region, S.M. Muratov, Kh.A. Abdivaitov, Sh.F. Rahmatillayev

Irrigation and Melioration

Water resources have become a very big problem in every part of Uzbekistan for several decades. Water is used not only exclusively for agricultural development, but also for many other purposes, such as industrial and chemical activities. Therefore, it is important to study the properties of surface water objects using optical and microwave satellite images. The Syrdarya region was selected for research. Because in the past, there have been no studies of water bodies using satellite images. The article presents the results of studies on the assessment of water properties from optical and microwave satellite images. In research for optical …

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Distribution Of Pressure And Specific Energy In The Twirled Stream For Confusor, A.A. Yangiev, D.S. Adjimuratov

Irrigation and Melioration

Article brings up the advantage of confusor part application in outflow part of vortex spillway, which may be more rational from the point of view of providing non-cavitation operation of flow swirler. Analytical design method and program developed is given of pressure and specific energy for aerated part of swirled flow in vortex spillway confusor part, which match with experimental results, it allows for fast and quite accurate realization of distribution analysis for pressure and specific energy in swirled flow along the length of the confusor for various rates of taper.

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Economic Assesment Of The Impact Of Climate Factors On Wheat Yield In Samarkand Region, Sh.B. Babakholov

Irrigation and Melioration

Agricultural production is highly vulnerable to climate shocks and predicted climate consequences may pose severe challenges to the resilience of Uzbek agricultural system, especially in terms of food security and income stability of rural producers. In this context, present study proposed to assess the impact of climate factors, such particular changes in mean temperature and rainfalls on total output of wheat-cultivating farmers in Samarkand region. By considering irrigation source and heterogeneous geography of the region, farmers engaged in wheat production were analyzed in two: upstream and downstream zones using Fixed effect panel approach. The empirical findings of study revealed that, …

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Change In Level Water In Pumping-Plant Intake, R.R. Ergashev, B.T. Xolbutayev

Irrigation and Melioration

A decrease in the water level in the pump chamber of the pumping stations leads to the formation of whirlpools in front of the suction pipes. As a result of air intake, the pump unit operates in cavitation mode and their intensive wear occurs. As the data obtained from the Karshi machine channel show, mainly a decrease in design water levels in the downstream waters is observed at the first pumping station. Depending on the number of simultaneously operating pumping units, the minimum water level in the head pumping station should be from 4.5 m to 5.7 m. The received …

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Modeling The Impact Of Changes In The Ground Water Level On The Stability Of Agricultural Landscapes Using Gis, A.M. Arifjanov, L.N. Samiev, F.K. Babajanov, G.M. Xamdamova, Sh.N. Yusupov

Irrigation and Melioration

The article presents modern GIS methods for determining the stability of changes in irrigated areas and the depth of the ground water level.the most correct solutions are given in modeling this process. To distinguish agricultural landscapes, the classification of agricultural acreage in the lower part of the Amu Darya river region was made using 16-day periodic rasters 2017 of 2018 and the NDIS MOD13Q1 sensor of agricultural acreage, type NDVI. The annual change in the level of underground water in relation to the state of rivers and channels is analyzed. A steady change in agricultural acreage on the right Bank …

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Determination And Assessment Of The Spatio-Temporal Changing Dynamics In The Groundwater Level And Mineralization In Irrigated Areas Under Climate Change (As An Example Of Syrdarya Province), S. Khasanov, S. Adilov, R. Kulmatov

Irrigation and Melioration

In the irrigated lands of the Aral Sea Basin, salinization processes are taking place as a result of rising groundwater levels and increasing its mineralization due to the unsustainable use of water and land resources. This, in turn, leads to the withdrawing of arable land and a decrease in crop yields. This is especially the case in the irrigated areas of the lower reaches of the Amudarya and Syrdarya rivers, located in Uzbekistan, southern Kazakhstan, and Turkmenistan. This research was aimed to learn and evaluate the long-term changing behavior of groundwater level and mineralization in the irrigated areas of the …

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Increasing The Efficiency Of Water Distribution Management When Operating Pumping Stations Of The Irrigation System, O.Y. Glovatsky, R.R. Ergashev, B. Hamdamov, N.M. Ismailov, B.T. Kholbutaev

Irrigation and Melioration

The article is to control the parameters of the unsteady movement of water in the canals and the pumping station, which ensure the maintenance of the specified operating modes of the pumping stations under non-stationary conditions. To achieve this goal, it is necessary to solve the problems of coordinating the operating modes of the units of the head pumping station (PS) with the operating modes of the partitioning structures in the conditions of emptying and filling the ponds of the main canal with water. The article discusses the implementation of the method of water distribution control on the mathematical model …

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Analysis Of Theoretical And Natural Field Studies Of Reservoir Silling, A.M. Arifjanov, F. Gapparov, T.U. Apakhujayeva, S.N. Xoshimov

Irrigation and Melioration

The article developed a mathematical model of the processes of siltation of reservoirs, taking into account the energy state of the flow, and proposed a calculation method. In the process of siltation of the reservoir, the dependence of the volume on the change in the water level in the reservoir was estimated. On the basis of studies carried out in full-scale field conditions, the recommended calculation method is comparatively evaluated and analyzed. Field studies were carried out in the Chimkurgan, Tashkent and Yuzhno-Surkhan reservoirs. A relationship is obtained that expresses the dependence of the relative volume of siltation of the …

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Planed Dimension Of Flow Deformed By A Single Dam That Is Impermeable To Water From The Body, M.R. Bakiev, K.T. Yakubov, I.J. Asamatdinov

Irrigation and Melioration

Coastal erosion is a type of water erosion that causes significant damage to the national economy each year: leaching of overland coastal crops, failure of protective dams, destruction of irrigation canals, dilapidated buildings and structures, among others. To combat leaching, cross-dams are used which are waterproof and water-permeable. The aim of this work was to develop a method for calculating the planned dimension of compressed flow with a transverse dam, which included comparing the lengths of the upper and lower tilt zones, the boundaries of individual zones and the results of research in the laboratory and in nature. According to …

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Research Of Energy Indicators Of Electric Drives With Frequency Converters (Frequency Converters) On The Operating Equipment Of Cotton Cleaning Plants, A.J. Isakov, B.K. Tukhtamishev, J.N. Tolipov

Irrigation and Melioration

The article deals with the theoretical and practical substantiation of the replacement of an unregulated electric drive of the main technological equipment of cotton refineries with a frequency-controlled electric drive. The influence of a change in the load on the motor shaft on the main parameters of the steady state is considered. In an asynchronous motor, with an increase in the load, slip increases to such a value at which the torque of the motor balances the increased moment of resistance. Considering that when the stator slip resistance is less than the critical one is a small fraction of the …

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Water Quality Of The Kaparas And Channel Reservoirs At The Tuyamuyun Hydro Complex, М. Ikramova, А. Khodjiev, I. Akhmedkhodjaeva

Irrigation and Melioration

The country's available water resources are consumed by various sectors of economy, such as industry, agriculture, energy, communal services. Due to the limited water resources, there are problems in proper water supply to the population. The article provides an assessment of the degree of mineralization and basic ions in the water of the Kaparas and Channel reservoirs based on field studies and laboratory analyses taking into account water volumes in the reservoirs and changes in water level. At the same time, it was identified that water quality exceeds standard indicators. For example, at using water for irrigation purposes salinity was …

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Stabilization Of Discharge Processes Involved In Electrical Fields Of Electrostatic Precipitators, Sh.M. Muzafarov, B.N. Erkinov, A.I. Pardaev, V.E. Baliskiy, B.К. Tаgaev

Irrigation and Melioration

The article provides information on achievements in the field of electrical gas cleaning. A critical analysis of the principle of operation of the electrostatic precipitators developed and currently in operation is carried out. The possibility of increasing the efficiency of electrical gas cleaning using unipolar voltage pulses is analyzed. A theoretical analysis of the processes in the discharge gap was carried out using the existing theory of electric discharges in gases. Based on the analysis of the data, the discharge mechanism is established in a sharply inhomogeneous electric field at a pulsed voltage. It is established that when using voltage …

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Determination Of The Rational Values Of The Parameters Of The Disc Rollers Of The Combined Unit, A.K. Igamberdiev, D.K. Muqimova

Irrigation and Melioration

In our country, repeated crops are sown in newly plowed lands. In such conditions, the use of combined units that perform several technological operations simultaneously in one pass is considered effective. However, due to the inadequacy and validity of the parameters of the working bodies for the quality of pre-sowing tillage in newly plowed lands, there is an increase in the number of passes, fuel consumption, loss of soil moisture and other costs and, as a result, the possibility of timely sowing and friendly germination of repeated crops is reduced . The rational parameters of the new design of disk …

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Autonomous Photovoltaic System For Year-Round Guarantee Supply Of Electricity To Rural Facilities, M.N. Tursunov, Х. Sabirov, U.R. Kholov, Т.Z. Аkhtamov

Irrigation and Melioration

The article discusses the physical and technical features of the experimental results of studying the parameters of an autonomous photovoltaic station (AFES) with a power of 2600 W designed and manufactured on the basis of 16 photovoltaic batteries made of polycrystalline silicon with an efficiency of 15.6 %. It is shown that an autonomous photovoltaic efficiently and reliably provides electric energy a lighting system for car parking in the winter season (January and February) and it is planned to lift water from a well with a depth of 70-80 m for irrigation and maintenance of the Heliopoligon from April 2020. …

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Improvement Of Stock Opening Diagram Of Uranium Deposits When Involving In Processing By Method Underground Leaching, Alikulov Sh.Sh., Akhadov Kh.R., Xalimov L.U.

Gorniy vestnik Uzbekistana

Uranium deposits of the Kyzylkum region, related to deposits of reservoir-infiltration or “sandstone” type and developed by the PV method, are formed mainly due to the occurrence of exogenous-epigenic processes in permeable rocks of the sedimentary cover. Research in practice shows that between the exploration characteristics often changes in the geometry of the ore body in the absence of confirmation of linear reserves. Therefore, use the present methodology to clarify the random errors of the parameters between exploration and industrial, to extract products from the bowels as much as possible and without loss. After clarification and justification of all necessary …

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Extraction Purification Of Concentrates Of Rare Earth Elements From Impurities And Natural Radionuclides, O.F. Petuhov, B.T. Ruziev, U.Z. Sharafutdinov

Gorniy vestnik Uzbekistana

The article presents the results of experimental studies on the extraction of rare-earth element concentrates from impurities and natural radionuclides. As part of the research, a technology for cleaning concentrates has been developed, including the following operations: Experimental studies have shown the possibility of effective purification of rare-earth element concentrates from impurities and natural radionuclides by the extraction method.

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On The Localized Settlement Of Geodetic Networks And Points For The Monitoring Of The Migration Of Landslides, B.R. Nazarov, H.T. Kayumova, R.X. Mukarramov

Journal of Tashkent Institute of Railway Engineers

The article is devoted to the formation of on-site geodetic network points to prevent geological processes such as landslides or large deformations, and provides methodology for establishing network points to continuously monitor the movement of avalanche sites. In addition, the methodology for the creation of geodetic network points at impassable distances are described.

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Research Of Porosity Of A Cement Stone With A Zeolite Containing Filler And A Superplasticstificator, Anvar Ishanovich Adilhodzhaev, I.A. Kadyrov, K.S. Umarov

Journal of Tashkent Institute of Railway Engineers

The question of the influence of the zeolite-containing filler of the Beltau deposit and the polycarboxylate superplasticizer on the formation of porosity of cement stone is considered. The results of experiments to establish the effect of a zeolite-containing filler and a plasticizing additive on pore size distribution are graphically presented. The data obtained confirm the advisability of using this type of filler in concrete.

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Features Of Laboratory Testing Methods Of Clayey Soils, A. Zhussupbekov, A. Tulebekova, U. Abduraimov

Journal of Tashkent Institute of Railway Engineers

The article compares the results of laboratory tests of dispersed soils to determine their strength characteristics. For this purpose, soils were tested on devices with three-axis compression and single-plane cut. In calculations for clay and sandy soils, indicators of their strength properties are used, which include such characteristics as the angle of internal friction φ and specific adhesion c. Based on the results of this work, recommendations on the practical application of the obtained soil characteristics for the geo-information geotechnical database of Astana were compiled.

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Mathematical Modeling Of The Carriage Movement Along The Descending Part To Movement Of The Marshalling Hump, Kh.T Turanov, Sh.U. Saidivaliev, Sh.B. Djabbаrov, Kh.Kh. Djalilov

Journal of Tashkent Institute of Railway Engineers

In the article, based on the basic law of point dynamics with non-ideal connection of theoretical mechanics, the speed of the car movement on each section of the descending part of the marshalling hump. A generalized model of the speed of the car at the calculated point of the marshalling hump is obtained. This model made it possible to calculate the instantaneous values of the speed of the car from the top of the hill to the calculated point in a continuous mode. This made it possible to speed up the process of plotting changes in accelerations, speeds, and time …

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On Design Features And Improvements Freight Wagon Braking Systems, U.Sh. Israilov

Journal of Tashkent Institute of Railway Engineers

The review of the basic schemes of brake lever transmissions used on freight wagons of Uzbekistan is presented. The advantages and disadvantages inherent to these schemes are shown. Methods of brake systems improvement are considered and the analysis of theoretical methods of their design evaluation is made.

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Equipment For Transportation Of Wooden Materials: New Technological Solutions And The Use Of High Strong Steels, N.A. Tanicheva, I.O. Filippova, R.V. Rahimov, Ya.O. Ruzmetov

Journal of Tashkent Institute of Railway Engineers

There is a need to develop a new design of removable reusable means for the transportation of timber on universal wagon platforms, including using high-strength steel. The use of high-strength steel improves the technical and economic performance of platform wagons for the transportation of timber. The need to develop the regulatory and technical base for the introduction of new high-strength steels in the wagon industry has been identified.

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Forecast Efficiency Of Application Of Electronic Documents In Cargo And Commercial Works On Railway Transport, N.M. Aripov, Sh.Sh. Kamaletdinov

Journal of Tashkent Institute of Railway Engineers

This article provides a predictive economic assessment of the introduction of electronic document management technology based on an electronic digital signature on the processes of freight and commercial work in rail transport. To determine the economic efficiency of the proposed technology, a technique was used that includes countable and uncountable effects. The constituent elements, the main economic indicators of the implementation of the automated system are detailed. Savings of money and time of railway transport and users of freight transportation services are determined.

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Increasing The Train Safety Level Based On A Process Approach, A.Kh. Makhkamov, M.Sh. Valiev

Journal of Tashkent Institute of Railway Engineers

The article deals with improving the level of train traffic safety based on the process approach, provides a classification of failures of technical means and methods of their parry. The main attention is paid to the occurrence of cases of traffic safety violations. To increase the level of the DB support system, the entire process of organizing transportation is divided into four main blocks: management processes, resource support processes, production processes, interaction and control processes.

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Modernization Of The Crate Suspension Unit Of The Vl-80s Electric Carrier, G.А. Khromova, D.O. Radjibaev, S.A. Khromov, I.C. Kamalov

Journal of Tashkent Institute of Railway Engineers

The article presents the development of a modernized design of a cradle suspension unit for an electric locomotive VL-80s with improved elastic-dissipative suspension properties with substantiation of dynamic and strength parameters. Numerical studies were carried out in the MathCAD 15 programming environment. For railway company is necessary to develop a new method of modernizing the cradle suspension of the VL-80s electric locomotive during overhaul repairs in order to improve the dynamic characteristics and increase the strength and reliability.

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Research Of Development Prospects Of Transportation Hub In Jsc "Umc", Marufdjan Xalikovich Rasulov, Sh.M. Suyunbayev, M.N. Masharipov

Journal of Tashkent Institute of Railway Engineers

As you know, an increase in the volume of production of any object requires to reasonably provide for a comprehensive analysis of the compliance of its technical equipment and technology of work with the prospective traffic volumes. The article analyzes the existing and prospective volumes of work, shows the results of calculations, the available throughput capacity of the station. "B" - Art. "З" and the throughput of the receiving and departure tracks stations "Z", "P" and “S ", the required number of shunting locomotives has been determined, a number of measures have been proposed to improve the work of the …

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Full-Text Articles in Civil and Environmental Engineering

City Tarmita (Old Termez) In The Kushans’ Period, Mamatmusaev Tohir

The Scientific-Practice Journal of Architecture, Construction and Design

Problems And Ways Of Solution In Transit Of Automobile Transport Of The Republic Of Uzbekistan, Aziz S. Khalmukhamedov

Acta of Turin Polytechnic University in Tashkent

Сharacteristics Mineral Resource Base Of Madagascar, A. E. Vorobyev, K. A. Vorobyov, S.A. Ndriambanuna, L.E. Schesnyak

Gorniy vestnik Uzbekistana

A New Technical Solution For Cleaning The Water Intake Structure Of Pumping Stations From Siltation And Its Experimental Research, M.M. Mukhammadiev, S.R. Juraev

Irrigation and Melioration

Assessing Surface Water Features Using Landsat-8 Oli And Sentinel-1 Satellite Images Case Study Sirdaryo Region, S.M. Muratov, Kh.A. Abdivaitov, Sh.F. Rahmatillayev

Irrigation and Melioration

Distribution Of Pressure And Specific Energy In The Twirled Stream For Confusor, A.A. Yangiev, D.S. Adjimuratov

Irrigation and Melioration

Economic Assesment Of The Impact Of Climate Factors On Wheat Yield In Samarkand Region, Sh.B. Babakholov

Irrigation and Melioration

Change In Level Water In Pumping-Plant Intake, R.R. Ergashev, B.T. Xolbutayev

Irrigation and Melioration

Modeling The Impact Of Changes In The Ground Water Level On The Stability Of Agricultural Landscapes Using Gis, A.M. Arifjanov, L.N. Samiev, F.K. Babajanov, G.M. Xamdamova, Sh.N. Yusupov

Irrigation and Melioration

Determination And Assessment Of The Spatio-Temporal Changing Dynamics In The Groundwater Level And Mineralization In Irrigated Areas Under Climate Change (As An Example Of Syrdarya Province), S. Khasanov, S. Adilov, R. Kulmatov

Irrigation and Melioration

Increasing The Efficiency Of Water Distribution Management When Operating Pumping Stations Of The Irrigation System, O.Y. Glovatsky, R.R. Ergashev, B. Hamdamov, N.M. Ismailov, B.T. Kholbutaev

Irrigation and Melioration

Analysis Of Theoretical And Natural Field Studies Of Reservoir Silling, A.M. Arifjanov, F. Gapparov, T.U. Apakhujayeva, S.N. Xoshimov

Irrigation and Melioration

Planed Dimension Of Flow Deformed By A Single Dam That Is Impermeable To Water From The Body, M.R. Bakiev, K.T. Yakubov, I.J. Asamatdinov

Irrigation and Melioration

Research Of Energy Indicators Of Electric Drives With Frequency Converters (Frequency Converters) On The Operating Equipment Of Cotton Cleaning Plants, A.J. Isakov, B.K. Tukhtamishev, J.N. Tolipov

Irrigation and Melioration

Water Quality Of The Kaparas And Channel Reservoirs At The Tuyamuyun Hydro Complex, М. Ikramova, А. Khodjiev, I. Akhmedkhodjaeva

Irrigation and Melioration

Stabilization Of Discharge Processes Involved In Electrical Fields Of Electrostatic Precipitators, Sh.M. Muzafarov, B.N. Erkinov, A.I. Pardaev, V.E. Baliskiy, B.К. Tаgaev

Irrigation and Melioration

Determination Of The Rational Values Of The Parameters Of The Disc Rollers Of The Combined Unit, A.K. Igamberdiev, D.K. Muqimova

Irrigation and Melioration

Autonomous Photovoltaic System For Year-Round Guarantee Supply Of Electricity To Rural Facilities, M.N. Tursunov, Х. Sabirov, U.R. Kholov, Т.Z. Аkhtamov

Irrigation and Melioration

Improvement Of Stock Opening Diagram Of Uranium Deposits When Involving In Processing By Method Underground Leaching, Alikulov Sh.Sh., Akhadov Kh.R., Xalimov L.U.

Gorniy vestnik Uzbekistana

Extraction Purification Of Concentrates Of Rare Earth Elements From Impurities And Natural Radionuclides, O.F. Petuhov, B.T. Ruziev, U.Z. Sharafutdinov

Gorniy vestnik Uzbekistana

On The Localized Settlement Of Geodetic Networks And Points For The Monitoring Of The Migration Of Landslides, B.R. Nazarov, H.T. Kayumova, R.X. Mukarramov

Journal of Tashkent Institute of Railway Engineers

Research Of Porosity Of A Cement Stone With A Zeolite Containing Filler And A Superplasticstificator, Anvar Ishanovich Adilhodzhaev, I.A. Kadyrov, K.S. Umarov

Journal of Tashkent Institute of Railway Engineers

Features Of Laboratory Testing Methods Of Clayey Soils, A. Zhussupbekov, A. Tulebekova, U. Abduraimov

Journal of Tashkent Institute of Railway Engineers

Mathematical Modeling Of The Carriage Movement Along The Descending Part To Movement Of The Marshalling Hump, Kh.T Turanov, Sh.U. Saidivaliev, Sh.B. Djabbаrov, Kh.Kh. Djalilov

Journal of Tashkent Institute of Railway Engineers

On Design Features And Improvements Freight Wagon Braking Systems, U.Sh. Israilov

Journal of Tashkent Institute of Railway Engineers

Equipment For Transportation Of Wooden Materials: New Technological Solutions And The Use Of High Strong Steels, N.A. Tanicheva, I.O. Filippova, R.V. Rahimov, Ya.O. Ruzmetov

Journal of Tashkent Institute of Railway Engineers

Forecast Efficiency Of Application Of Electronic Documents In Cargo And Commercial Works On Railway Transport, N.M. Aripov, Sh.Sh. Kamaletdinov

Journal of Tashkent Institute of Railway Engineers

Increasing The Train Safety Level Based On A Process Approach, A.Kh. Makhkamov, M.Sh. Valiev

Journal of Tashkent Institute of Railway Engineers

Modernization Of The Crate Suspension Unit Of The Vl-80s Electric Carrier, G.А. Khromova, D.O. Radjibaev, S.A. Khromov, I.C. Kamalov

Journal of Tashkent Institute of Railway Engineers

Research Of Development Prospects Of Transportation Hub In Jsc "Umc", Marufdjan Xalikovich Rasulov, Sh.M. Suyunbayev, M.N. Masharipov

Journal of Tashkent Institute of Railway Engineers