CONCEPTUAL MODELING THE SYSTEM FOR ENSURING DESIGN RELIABILITY OF THE OFFSHORE ICE-RESISTANT HYDRAULIC STRUCTURES BASES

The purpose of the work is to consider methods for calculating the forecast of groundwater backwater in the zone of influence of hydraulic structures. The analysis of analytical dependences of calculation of the forecast of groundwater backwater for various calculation schemes is carried out. For a homogeneous scheme of the geofiltration structure, a numerical model is proposed and a computational program for calculating the groundwater backwater is developed. It allows calculating the groundwater backwater from the channel at any time in the discrete mode. To simplify the solution of the problem of calculating the groundwater backwater, a computer program was created in the programming language Phyton Version 8.3 which quickly solves this hydrogeological problem. A possible range of geofiltration parameters is proposed for calculating the groundwater backwater near main channels. The adaptation and implementation of the software model was carried out for a specific object – the Bolshoy Stavropol channel-5, for which forecast calculations were made. The results of predictive calculations of groundwater backwater are the basis for the assessment of areas of possible flooding – the territory within which the level of ground water increases as a result of their backup by a hydraulic structure.

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JUSTIFICATION OF CHOOSING A SAFE LOCATION OF HYDRAULIC STRUCTURES LOCATED IN CLOSE PROXIMITY TO THE WATER EDGE

Prirodoobustrojstvo ◽

10.26897/1997-6011-2020-3-122-129 ◽

2020 ◽

pp. 122-129

Author(s):

V.B. ZHEZMER ◽

Keyword(s):

Hydraulic Structures ◽

Close Proximity ◽

Water Edge

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Shape Optimization of Hydraulic Structures: an Example of an Optimum Design of a Fish Passage

10.29007/2k64 ◽

2018 ◽

Author(s):

Pat Prodanovic ◽

Cedric Goeury ◽

Fabrice Zaoui ◽

Riadh Ata ◽

Jacques Fontaine ◽

...

Keyword(s):

Numerical Model ◽

Shape Optimization ◽

Objective Function ◽

Optimum Design ◽

Optimization Problem ◽

A Priori ◽

Coupled System ◽

Fish Passage ◽

Hydraulic Structures ◽

Design Variables

This paper presents a practical methodology developed for shape optimization studies of hydraulic structures using environmental numerical modelling codes. The methodology starts by defining the optimization problem and identifying relevant problem constraints. Design variables in shape optimization studies are configuration of structures (such as length or spacing of groins, orientation and layout of breakwaters, etc.) whose optimal orientation is not known a priori. The optimization problem is solved numerically by coupling an optimization algorithm to a numerical model. The coupled system is able to define, test and evaluate a multitude of new shapes, which are internally generated and then simulated using a numerical model. The developed methodology is tested using an example of an optimum design of a fish passage, where the design variables are the length and the position of slots. In this paper an objective function is defined where a target is specified and the numerical optimizer is asked to retrieve the target solution. Such a definition of the objective function is used to validate the developed tool chain. This work uses the numerical model TELEMAC- 2Dfrom the TELEMAC-MASCARET suite of numerical solvers for the solution of shallow water equations, coupled with various numerical optimization algorithms available in the literature.

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The Effect of Cutoffs on the Uplift Pressure Beneath the Hydraulic Structures Floor

Wasit Journal of Engineering Sciences ◽

10.31185/ejuow.vol6.iss3.101 ◽

2018 ◽

Vol 6 (3) ◽

pp. 20-28

Author(s):

Faisal Al Tabatabaie ◽

Dhabia Sabeeh Al Waily

Keyword(s):

Potential Energy ◽

Hydraulic Structure ◽

Hydraulic Structures ◽

Outer Face ◽

Analogue Model ◽

Electrical Analogue ◽

Uplift Pressure ◽

Different Depths ◽

The Stability ◽

Critical Sections

The use of cutoffs underneath the hydraulic structures is considered a safe solution to ensure the stability of hydraulic structure against uplift pressure and piping phenomenon in addition to the sliding and overturning forces of the water. These cutoffs are used at critical sections underneath the floor of hydraulic structure to substitute with their depths the horizontal lengths of the creep line of the hydraulic structure base. In this paper, the experimental method- by using electrical analogue model- was carried out to plot the flow net and study the efficiency of the front and rear faces of the cutoffs for dissipating the potential energy of the percolating water underneath the floor of hydraulic structure. An electrical analogue model which was used in this study consists of twenty five models with different depths of upstream and downstream cutoffs. After plotting the flow net for all models, it is concluded that the efficiency of the inner sides are less than that of the outer sides which were investigated before in this topic of this work that both faces reduction values in the uplift pressure are considered the same, where the efficiency of the outer face of upstream cutoff is (70.35) % and for the inner face is (29.64)%, while for the downstream cutoff the efficiency for the outer face is (76.21)% and for the inner face is (23.79)% .

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