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№ 2 (95)
UNIVERSUM:
ТЕХНИЧЕСКИЕ НАУКИ
февраль, 2022 г.
PROTECTION OF TRANSPORT STRUCTURES IN SANDY DESERTS FROM MOVING SANDS
Saidburkhan Djabbarov
DSc., professor., Tashkent State Transport University, Uzbekistan, Tashkent E-mail: saidhon @inbox.ru
Khurshidbek Abdullaev
Doctoral student Tashkent State Transport University, Uzbekistan, Tashkent E-mail: [email protected]
ЗАЩИТА ТРАНСПОРТНЫХ СООРУЖЕНИЙ В ПЕСЧАНЫХ ПУСТЫНЯХ
ОТ ПОДВИЖНЫХ ПЕСКОВ
Джаббаров Саидбурхан Тулаганович
д-р техн. наук, профессор,
Ташкентский государственный транспортный университет,
Республика Узбекистан, г. Ташкент
Абдуллаев Хуршидбек Дилшодбек угли
докторант,
Ташкентский государственный транспортный университет,
Республика Узбекистан, г.Ташкент
ABSTRACT
In this article analyzes the results of research and practical experience of foreign and domestic scientists in the field of protecting transport facilities from moving sands; research methods and techniques are being studied; the relevance of the problem and the planned research are discussed.
АННОТАЦИЯ
В статье проанализированы результаты исследований и практический опыт зарубежных и отечественных ученых в области защиты объектов транспорта от подвижных песков; изучаются методы и способы исследования, актуальность проблемы и отзывы о будущих исследованиях.
Keywords: sandy deserts, mobile sands, protection devices, deflation, sand mitigation measures (SMM).
Ключевые слова: песчаные пустыни, подвижные пески, защитные устройства, дефляция, пескозакрепитель-ное мероприятия (SMM).
Over the past years, a number of projects aimed at improving road and transport infrastructure in accordance with international standards, designing, building modern roads, increasing traffic convenience and safety have been funded by World Bank, European Bank for Reconstruction and Development, Asian Development Bank, Islamic Development Bank, Saudi Fund for Development and Kuwait Fund for Arab Economic Development and other international financial institutions [1].
Given the geographical location of the country, the growth of the modern road network is one of the priority tasks in the competitiveness of the economy, the development of transport capacity and the expansion of export opportunities [2].
At present, the total length of the country's road network is 209.5 thousand km, and they are operated in different climatic and topographic conditions (Figure 1.).
Библиографическое описание: Djabbarov S., Abdullaev K. PROTECTION OF TRANSPORT STRUCTURES IN SANDY DESERTS FROM MOVING SANDS // Universum: технические науки : электрон. научн. журн. 2022. 2(95). URL: https://7un iversum. com/ru/tech/arch ive/item/13036
№ 2 (95)
UNIVERSUM:
ТЕХНИЧЕСКИЕ НАУКИ
февраль, 2022 г.
Figure 1. General network of highways in the Republic of Uzbekistan
About 4,000 km of the main road network passes through the Kyzylkum, Aralkum, Ustyurt plateau, Mirzachul, Sundukli deserts of the Republic, some sections of highways A-380 "Guzar - Bukhara - Nukus -Beineu", A-373 "M39 highway - Guliston - Buka -Angren - Kokand-Andijan-Osh", M-39 "Almaty -Bishkek - Tashkent - Shahrisabz - Termez", M- 37 "Samarkand - Bukhara - Turkmenbashi", M- 34 "Tashkent - Dushanbe", A-378 "Samarkand -Guzor", A-379 "Navoi - Uchkuduk"[3] of international,
state and local significance have passed in the most difficult conditions of the Republic.
In these areas, sand deflation (latin "deflatio" - flight), ie the process of sand movement, occurs on a regular basis.
Sand particles displaced by wind and sand accumulate in some places and have a negative impact on the technical condition of transport infrastructure facilities (roads, railways, artificial structures), the safe movement of all types of vehicles [4,5,6] (Figure 2).
№ 2 (95)
UNIVERSUM:
ТЕХНИЧЕСКИЕ НАУКИ
февраль, 2022 г.
From the day the road network was built in the sandy deserts to the present day, the protection of transport infrastructure facilities from moving sands has always been one of the most pressing issues, according to several generations of researchers.
During the last 40-50 years, in abroad L. Bruno, J. Zakeri, D. Francos, A. Guidis, M. Ismaili, in the CIS countries A.S. Podgornov, S.K. Viesov, A.G. Babaev, so in Uzbekistan A. Danilin, E.A. Aripov, R.S. Zokirov, T.I. Fozilov, M. Mirakhmedov, A.I. Adilkhodjaev, S.T. Jabbarov, M.K. Muzaffarova and others have conducted research.
In particular, Professor L.Bruno of the Polytechnic University of Turin (Italy) said in his study that the lack of a classification of measures to reduce the negative impact of sand on the main infrastructure elements of the railways is a sign of the lack of structural elements. proposed [7]. Academician of the Academy of Sciences of Turkmenistan Babaev A.G. developed recommendations for the selection of types, methods and means of protection for mobile sands based on climatic conditions [8,9].
Professor Zokirov R.S. created a scientific school on methods and techniques to protect railways passing through sandy areas from sand landslides. The scientist classified the means of protection of structures from sand into 4 types depending on the occurrence rate[10].
Professor Fozilov T.I. and improved its work, taking into account other indicators [11].
In addition, professors Fozilov T.I, Mirakhmedov M., Adilkhodjaev A.I, associate professor Muzaffarova M.K. described the results of practical experiments in their scientific work on the protection of transport facilities from sand migration using chemicals[12,13,14,15]. The theoretical basis for defining the boundaries of the protection of high-speed railways passing through sandy areas was developed by Professor S.T. Djabbarov [16, 17, 18].
The research suggests the following basic methods of protecting transport facilities from sand drifts in sandy deserts:
а) mechanical protection method (reinforced concrete or metal barriers, walls, hills, geotextiles, etc.);
б) chemical protection method (bitumen, emulsion, polymeric materials, etc.);
c) biological protection method (planting of plants adapted to the desert area).
Today, despite the fact that these methods are sufficiently studied, the results are widely used in practice, no effective method has been developed to protect buildings in sandy deserts, including transport infrastructure facilities from landslide sands.
The growth of desert areas in the last half century shows that one of the most pressing issues today is to further improve the above-mentioned methods of protection against landslides on the basis of information technology, new composite materials, modern computational methods.
References:
1. Decree of the President of the Republic of Uzbekistan PF-5890 dated December 9, 2019 "On measures to deep reform the road system of the Republic of Uzbekistan". (https://lex.uz/docs/4634786).
2. Press conference of the Committee for Motor Roads for the media on "Projects in the field of road construction and repair in 2021 and their quality control". (https://www.uzavtoyul.uz/cy/post/19-04-2021.html).
3. Resolution of the Cabinet of Ministers of the Republic of Uzbekistan No. 169 of 2010 "On approval of the list of public roads of the Republic of Uzbekistan", (http://lex.uz//docs/1664887).
4. M. Mirakhmedov, K. Abdullaev, M. Muzaffarova, A. Khudoyorov. Comprehensive classification of measures to reduce the negative impact ofwind on roads and railways in a sandy desert / Transport Problems - XIII International Conference - Poland - 2021.,535-538 pp.
5. Bruno L. & Fransos D. & Lo Giudice A. Solid barriers for windblown sand mitigation: aerodynamic behavior and conceptual design guidelines. J. Wind Eng. Industrial Aerodynamics. 2018. Vol. 173. P. 79-90.
6. Zakeri J.A. Investigation on railway track maintenance in sandy-dry areas. Structure and infrastructure engineering: maintenance, management. Life-Cycle Des. Perform. 2012. Vol. 8. P. 135-140.
7. L. Bruno, N. Coste, D. Fransos, A.Lo Giudice, L. Preziosi, L. Raffaele / Shield for sand: an innovative barrier for windblown sand mitigation. Recent Patentson Engineering. Vol.12, Issu 3, 2018. p.237-246
8. Babaev A.G. Opyt stabilizatsii podvijnyx peskov v basseyne Aralskogo morya // Problemy osvoeniya pustyn. International scientific-practical journal. Ashgabat. 2015. № 1-2. DOI: 556.51: 574 (262.83) 575.4.[in Russian].
9. Babaev A.G. Global warming climate I opustynivanie // Probl. osv. pustyn. 2018. №3-4. [in Russian].
10. Zakirov R.S. New sposobe zakrepleniya podvijnyx peskov / Put i putevoe xozyaystvo, № 6, 1981, pp.22-23.[in Russian].
11. Fazilov T.I. Zakreplenie podvijnyx sands vyajushchimi veshchestvami. -Tashkent: Fan, 1987. -104 p.[in Russian].
12. M. Miraxmedov, X. Abdullaev, A. Khudoyorov. Mery po smyagcheniyu negativnogo vozdeystviya vetropeschanogo potoka na sostoyanie injenernyx soorujeniy v peschanoy pustyne: sostoyanie i perspektivy / Transport Shyolkovogo Puti, №4, 2020, p.61-68.[in Russian].
13. Miraxmedov M.M. Osnovy metodologi i organizatsii peskozakrepitelnyx rabot i zashchita prirodno-tehnicheskix obektov ot peschanyx zanosov / Monografiya. - Tashkent: Science and technology, 2008. 248 p. [in Russian].
14. Adylkhodzhayev A.I. Razrabotka sostava i primeneniye gossipolovoy emul'sii dlya zakrepleniya podvizhnykh peskov/ Avtoref...kand. tekh. nauk. -Tashkent, 1978. -27 s.[in Russian].
№ 2 (95)
UNIVERSUM:
ТЕХНИЧЕСКИЕ НАУКИ
февраль, 2022 г.
15. Muzaffarova M.K. Resursosberegayushcheye zakrepleniye podvizhnykh peskov vyazhushchimi materialami mestnogo proizvodstva. Dissertatsiya na soiskaniy estepeni PhD. - Tashkent, TASI, 2018. - 114 s.[in Russian].
16. Djabbarov Saidburkhan / PRESSURE TO RAILWAY INFRASTRUCTURE FROM THE HIGH-SPEED TRAIN MOVEMENT // Conference International Transportation Geotechnics and Geoecology, TGG 2017, Saint Petersburg, Russia 17-19 May 2017, Procedia Engineering 189 ( 2017 ) 554 - 559
17. Djabbarov Saidburkhan, Mirakhmedov M., Sladkowski Aleksander/ Potential and Problems of the Development of Speed Traffic on the Railways of Uzbekistan// Transport Systems and Delivery of Cargo on East-West Routes. / Editors: Sladkowski, Aleksander (Ed.) Springer International Publishing. Series Volume 155. 2018. P.p.369-421
18. Djabbarov S.T., Mirakhmedov M./ Issledovaniye vozdushnogo potoka ot dvizhushchegosya vysokoskorostnogo poyezda na prilegayushchey polose puti v rayonakh rasprostraneniya barkhannykh peskov//Aktual'nyye problemy razvitiya transportnoy infrastruktury: sbornik nauchnykh trudov/ red. A.F. Kolos , A.V. Kabanov. - SPb.: FGBOU VO PGUPS, 2018. - 335 s.[inRussian].
