Safety Evaluation of Movable Weirs for Drainage of Underflow Water

Abstract

Korea topography accounts for 70% of the country's land area. A plan to secure water resources considering this characteristic is to utilize small-scale reservoirs using movable weirs. In this study, we aim to develop a movable weir that can discharge water from the bottom of the reservoir and evaluate the structural safety of the movable weir that can discharge water to the bottom layer; the safety of the movable weir is evaluated by comparing and analyzing the results of each other. The movable information used in this study was classified into two types (water body and bottom discharge sluice gate) according to usability and the installation location. First, the design of the hydrological body and lower discharge hydrological gate were simplified, and the simplification was evaluated by calculating stress, sagging, and twisting. Tensile, compression, and shear stresses were calculated by conducting FEM analysis by applying variables to the elements of the standing angle to the hydrological body and lower discharge hydrological gate where the simplification work was completed. In the case of the hydrological body, the variables of the standing angle were classified into and analyzed. In the case of the lower discharge hydrological gate, the variables of the rotating link axis were classified into 20 mm, 22 mm, 24 mm, and 26 mm in thickness and analyzed. Determining safety by classifying mobile beams capable of discharging low-rise water into moisture bodies and lower discharge sluices confirmed that the components of mobile beams under a given condition did not exceed allowable stress.