ОПРЕДЕЛЕНИЕ ПРОДОЛЖИТЕЛЬНОСТИ ГИДРАВЛИЧЕСКОЙ ПРОМЫВКИ ПРИ ЗАДАННЫХ ХАРАКТЕРИСТИКАХ НЕСВЯЗАННОЙ ГРУНТОВОЙ СРЕДЫ
ГИДРОТЕХНИКА И ГИДРАВЛИКА
Abstract
In the process of operation of reservoirs, canals, sedimentation structures and other channel hydrotechnical structures, sediments are deposited, which flow from the upper sections of the rivers with the flow. The spread of these deposits creates serious operational problems for structures and beds with time. Therefore, the measures for flushing and transporting the deposited sediment with water are of great practical importance. The destruction of the soil ground and the transportation (hydraulic flushing) are used in the construction and operation of hydraulic structures. Despite this, the scientific validity of this phenomenon remains at a fairly low level. There are no theoretical models for describing the ongoing processes, or estimates for determining the characteristics that determine the phenomenon under investigation. From a practical and operational point of view, the most important tasks are those that determine the eroded flow rate, the volume of the ground blurred by the flow, and the duration of hydraulic flushing of this ground mass. The formulation of the problem is
presented, the boundary conditions are clearly defined, and the method of mathematical testing of the physical process under study is given. Taking into account these materials, a differential equation is calculated for the balance of the soil mass washed out and carried away by the flow. The main results of analytical development, allowing to establish the relationship between the time of hydraulic flushing, the discharge of washed-out soil and the coordinates of the soil ground are introduced. The solution of the obtained differential equation, taking into account the boundary conditions of the problem, allows to calculate its duration at a given stage of the flushing process, and then the volume of the ground washed away by the flow. The solution obtained can be used in technical calculations and operational engineering measures to clean sediments in sedimentation facilities, reservoirs and other hydraulic structures filled with sediments.
