بررسی تأثیر موانع گابیونی شکل بر رسوبات عبوری

نوع مقاله : مقاله کامل پژوهشی

نویسندگان

1 گروه مهندسی عمران، واحد نجف‌آباد، دانشگاه آزاد اسلامی، نجف آباد

2 گروه سازه‌های آبی، دانشکده مهندسی آب و محیط‌زیست، دانشگاه شهید چمران اهواز

3 گروه مهندسی آب، دانشکده کشاورزی، دانشگاه صنعتی اصفهان و گروه مهندسی عمران، واحد نجف آباد، دانشگاه آزاد اسلامی، نجف آباد

چکیده

رسوب­گذاری در مخازن به­ عنوان مهم­ترین عامل در کاهش عمر مفید سدهای بزرگ شناخته می­شود. براساس مطالعات مشخص شد که عامل اصلی در جابه­ جایی رسوبات جریان­ های غلیظ بوده، بر این اساس محققین در سال­ های اخیر راهکارهای گوناگونی برای کنترل این جریان­ ها ارائه نمودند که استفاده از موانع به­ عنوان یکی از مؤثرترین راهکارها شناخته می­شود. با درک دقیق عملکرد این جریان­ ها و عوامل مؤثر بر آن­ها می­توان گامی مؤثر در جهت کنترل یا حذف آن­ها برداشت. بر این اساس در این تحقیق به بررسی اثر تغییرات ارتفاع مانع گابیونی (Gabion) با قطر 7/0 سانتی­متر تحت تأثیر پارامترهای مختلف پرداخته شده است. به این صورت که تغییرات ارتفاع مانع (1، 5/1 و 2 برابر بدنه جریان غلیظ)، دبی (1، 5/1 و 2 لیتر برثانیه)، غلظت (10 و 15 گرم بر لیتر)، شیب (5/1، 2 و 5/2 درصد) موردبررسی قرار گرفت. نتایج بیانگر این مورد بود که سه پارامتر شیب کف فلوم (Flume Slope)، غلظت و دبی ورودی موردبررسی در این تحقیق از عوامل مؤثر بر مومنتم (Momentum) جریان بوده و با افزایش هر یک از این پارامترها، میزان عملکرد موانع با نسبت بی­بعد ارتفاع 1 و 5/1 کاهش پیدا می­کند اما در مانع با نسبت بی­بعد ارتفاع 2 عملکرد مانع بهتر شده، به­ گونه­ای که هنگام برخورد جریان با مانع اغتشاش زیاد ایجاد شده که سبب کاهش چشمگیر هد جریان غلیظ می­گردد، به این صورت که نرخ متوسط کاهش فلاکس هد (Head Flux) برای موانع با نسبت ارتفاع 1، 5/1 و 2 به­ترتیب 32، 45 و 92 درصد می­باشد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Experimental Investigation of the Effect of Gabion-Shaped Obstacles on Sedimentation

نویسندگان [English]

  • Mehdi Derakhshannia 1
  • Mehdi Ghomshi 2
  • Saeid Eslamian 3
  • S. Mahmod Kashefipour 2
1 Department of Civil Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
2 Department of Water Structures, Faculty of Water and Environmental Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran
3 Department of Civil Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran and Department of Water Engineering, College of Agriculture, Isfahan University of Technology, Isfahan, Iran
چکیده [English]

The researchers tried to build gabion barriers by considering the materials around the dam. In this study, gabion barriers with applicability were used, in which trapezoidal barriers were made using metal mesh and these barriers were filled with sand grains with an average size of 0.5 cm. The reason for using these dimensions of aggregate was the presence of stones with dimensions of 0.5 meters in nature, and if the laboratory results are suitable, it is possible to use them in the implementation, while proper slope. According to the executive criteria, it was considered to build the sides of the barrier in order to evaluate the possibility of falling aggregates. In this design, an attempt has been made to investigate the effect of gabion barriers on the percentage reduction of flow head flow. To better understand their efficiency in different conditions, some important parameters such as concentration, inlet discharge, slope and height of barriers have been considered.

کلیدواژه‌ها [English]

  • Density currents
  • Gabion Obstacles
  • Head Flux
  • Momentum

مراجع

Abhari MN, Iranshahi M, Ghodsian M, Firoozabadi B, “Experimental study of obstacle effect on sediment transport of turbidity currents”, Journal of Hydraulic Research, 2018, 56 (5), 618-629.
Doi: 10.1080/00221686.2017.1397778.
Alavi SR, Lay EN, Makhmali, ZA, “A CFD study of industrial double-cyclone in HDPE drying process”, Emerging Science Journal, 2018, 2 (1), 31-38.
Alves M, Gaillard, F, Sparrow M, Knol M, Giraud S, “Circulation patterns and transport of the Azores Front-Current system”, Deep Sea Research Part II: Topical Studies in Oceanography, 2002, 49 (19), 3983-4002.
Asghari Pari SA, Kashefipour SM, Ghomeshi M, “An experimental study to determine the obstacle height required for the control of subcritical and supercritical gravity currents”, European Journal of Environmental and Civil Engineerin, 2017, 21 (9), 1080-1092.
Asghari Pari SA, Habibagahi G, Ghahramani A, Fakharian K, “Improve the design process of pile foundations using construction control techniques”, International Journal of Geotechnical Engineering, 2019, 1 (1), 1-8. Doi: 10.1080/19386362.2019.1655622.
Asghari Pari SA, Habibagahi G, Ghahramani A, Fakharian K, “Reliability-based calibration of resistance factors in lrfd method for driven pile foundations on inshore regions of Iran”, International Journal of Civil Engineering, 2019, 17 (12), 1859-1870.
Barahmand N, Shamsai A, “Experimental and theoretical study of density jumps on smooth and rough beds, Lakes & Reservoirs”, Research and Management, 2010, 15 (4), 285-306.
Bogdanov II, Mourzenko VV, Thover JF, Adler PM, “Effective permeability of fractured porous media in steady state flow”, Water Resources Research, 2003, 39 (1), 13-24.
Chamoun S, De Cesare G, Schleiss AJ, “Managing reservoir sedimentation by venting turbidity currents: A review”, International Journal of Sediment Research, 2016, 31 (3), 195-204.
De Cesare G, Oehy CD, Schleiss AJ, “Circulation in stratified lakes due to flood-induced turbidity currents”, Journal of Environmental Engineering, 2006, 132 (1), 1508-1517.
Farizan A, Yaghoubi S, Firoozabadi B, Afshin H, “Effect of an obstacle on the depositional behaviour of turbidity currents”, Journal of Hydraulic Research, 2019, 57 (1), 75-89.
Hu P, Cao Z, Pender G, Tan G, “Numerical modelling of turbidity currents in the Xiaolangdi reservoir, Yellow River, China”, Journal of Hydrology, 2012, 464, 41-53.
Janocko M, Cartigny M, Nemec W, Hansen E, “Turbidity current hydraulics and sediment deposition in erodible sinuous channels: laboratory experiments and numerical simulations”, Journal of Marine Petroleum Geology, 2013, 41, 222-249. Doi: 10.1016/j.marpetgeo.2012.08.012.
Jawaduddin M, Memon SA, Bheel N, Ali F, Ahmed N, Abro AW, “Synthetic Grey Water Treatment Through FeCl3-Activated Carbon Obtained from Cotton Stalks and River Sand”, Civil Engineering Journal, 2019, 5 (2), 340-348.
Khosropour S, Kashifipour SM, Daryaei M, “Investigation of the effect of density and arrangement of rough blocks with obstacle on the control of density current head”, Hydraulic Journal, 2019, 14 (2), 115-105 (In Persian).
Koohandaz A, Khavasi E, Eyvazian A, Yousefi H, “Prediction of particles deposition in a dilute quasi-steady gravity current by Lagrangian markers: effect of shear-induced lift force”, Scientific Reports, 2020, 10 (1), 1-17.
Kordnaeij A, Kalantary F, Kordtabar B, Mola-Abasi H, “Prediction of recompression index using GMDH-type neural network based on geotechnical soil properties”, Soils and Foundations, 2015, 55 (6), 1335-1345.
Li N, Sheng GP, Lu YZ, Zeng RJ, Yu HQ, “Removal of antibiotic resistance genes from wastewater treatment plant effluent by coagulation”, Water Research, 2017, 111 (1), 204-212.
Marosi M, Ghomeshi M, Sarkardeh H, “Sedimentation control in the reservoirs by using an obstacle”, Sadhana, 2015, 40 (4), 1373-1383.
Massoudinejad M, Hashempour Y, Mohammad H, “Evaluation of carbon aerogel manufacturing process in order to desalination of saline and brackish water in laboratory scale”, Civil Engineering Journal, 2018, 4 (1), 212-220.
Mohammadi MAH, Asghari Pari SA, Sajjadi SM, “Laboratory study of the effect of height, shape and location of gabion obstacles in controlling dense sediment current”, Journal of Soil and Water Conservation Research, 2016, 23 (4), 265-251 (In Persian).
Nogueira W, Litvak L, Edler B, Ostermann J, Büchner A, “Signal processing strategies for cochlear implants using current steering”, EURASIP Journal on Advances in Signal Processing, 2009, 1, 213-224.
Nomura S, Hitomi J, De Cesare G, Takeda Y, Yamamoto Y, Sakaguchi H, “Sediment mass movement of a particle-laden turbidity current based on ultrasound velocity profiling and the distribution of sediment concentration”, Geological Society, 2019, 477 (1), 427-437.
Oehy CD, Schleiss AJ, “Control of turbidity currents in reservoirs by solid and permeable obstacles”, Journal of Hydraulic Engineering, 2007, 133 (6), 637-648.
Oshaghi MR, Afshin H, Firoozabadi B, “Experimental investigation of the effect of obstacles on the behavior of turbidity currents”, Canadian Journal of Civil Engineering, 2013, 40 (4), 343-352.
Sinnakaudan SK, Ghani AA, Ahmad MS, Zakaria NA, “Multiple linear regression model for total bed material load prediction”, Journal of Hydraulic Engineering, 2006, 132 (5), 521-528.
Vladimirov IY, Korchagin N, Savin A, “Wave influence of a suspension-carrying current on an obstacle in the flow”, in Doklady Earth Sciences, Springer Science & Business Media, 2015, 461 (1), 286-293.
Xu J, Li Y, Xuan G, Melville BW, Macky GH, “Numerical simulation of turbidity current in approach channels with a closed end”, Journal of Waterway, Port, Coastal, and Ocean Engineering, 2020, 146 (5), 1-11.
Zeynivand M, Kashfipour SM, Qomshi M, “Laboratory study of the effect of permeability of permeable plates on concentrated flow control”, Journal of Irrigation Science and Engineering, 2016, 40 (1), 13-24 (In Persian).

فایل ها

هم رسانی

ارجاع به این مقاله

آمار