Influence of a Subsidiary Weir on the Stability of a Main Structure Built on a Finite Stratum
Author:
Ghazaw Yousry Mahmoud1ORCID, Ghumman Abdul Razzaq2ORCID, Al-Janabi Ahmed Mohammed Sami3ORCID, Ahmed Afzal4, Aamir Erum5, Ikram Rana Muhammad Adnan6ORCID
Affiliation:
1. Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt 2. Department of Civil Engineering, College of Engineering, Qassim University, Buraydah 51452, Saudi Arabia 3. Department of Civil Engineering, Cihan University-Erbil, Erbil 44001, Kurdistan Region, Iraq 4. Department of Civil Engineering, University of Engineering and Technology, Taxila 47050, Pakistan 5. Institute of Environmental Sciences and Engineering, National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan 6. School of Economics and Statistics, Guangzhou University, Guangzhou 510006, China
Abstract
Some dams globally have negatively affected downstream structures. Constructing subsidiary weirs may solve this problem. This novel study focuses on investigating the parameters of seepage beneath the original structure and the proposed subsidiary weir. Conformal mapping and finite element methods are used for the analysis. The proposed subsidiary weir consists of a sloping central apron, flat aprons on both the downstream and upstream ends, and upstream and downstream sheet piles of varying depths. The existing structure also has sheet piles of different depths at its upstream and downstream ends, with an impervious layer situated at a specific depth below both the structures. The study derives equations for the simulation of the upwards pressure on both the structures, seepage rate, and exit gradient along the downstream bed and the filter at an intermediate location. Our own developed software for the analysis and a commercial software for numerical methods named Finite Element Heat Transfer (FEHT)-version-1are used to calculate these parameters. The accuracy of the analytical and numerical methods is verified by comparing the results with experimental data, which demonstrate a good level of agreement. This study also simulates the impacts of various factors, such as sheet pile configurations, the depth of the stratum beneath the structure, the ratio of effective heads, and the length of the intermediate filter.
Funder
Deanship of Scientific Research, Qassim University
Subject
Fluid Flow and Transfer Processes,Mechanical Engineering,Condensed Matter Physics
Reference34 articles.
1. Al-Janabi, A.M.S., Ghazali, A.H., Yusuf, B., Sammen, S.S., Afan, H.A., Al-Ansari, N., Shahid, S., and Yaseen, Z.M. (2020). Optimizing Height and Spacing of Check Dam Systems for Better Grassed Channel Infiltration Capacity. Appl. Sci., 10. 2. Yaseen, Z.M., Ameen, A.M.S., Aldlemy, M.S., Ali, M., Abdulmohsin Afan, H., Zhu, S., Sami Al-Janabi, A.M., Al-Ansari, N., Tiyasha, T., and Tao, H. (2020). State-of-the Art-Powerhouse, Dam Structure, and Turbine Operation and Vibrations. Sustainability, 12. 3. Impact of rehabilitation of Assiut barrage, Nile River, on groundwater rise in urban areas;Dawoud;J. Afr. Earth Sci.,2006 4. Seepage control for Satpara dam, Pakistan;Malik;Proc. Inst. Civ. Eng. Geotech. Eng.,2008 5. Analysis of Seepage Under Hydraulic Structures Using Slide Program;Alnealy;Am. J. Civ. Eng.,2015
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