Abstract

Ground and environmental vibrations induced by high dam flood discharge from the Xiangjiaba hydropower station (XHS) has significant adverse effects on nearby building safety and the physical and mental health of surrounding residents. As an effective approach to simulate the flow-induced vibration of hydraulic structures, the hydro-elastic experiment approach has been extensively applied and researched by Chinese scholars, but the relevant systematic research is rarely reported in international journals. Firstly, the hydraulic and structural dynamic similarity conditions that should be satisfied by the hydro-elastic model are briefly reviewed and derived. A hydro-elastic model of the XHS was further constructed using self-developed high-density rubber, and the vibration isolation system (including open trenches and flexible connects) was applied to avoid the external disturbances of pump operation, vehicle vibration and other experiments in the laboratory. Based on the data of model and prototype dynamic tests, a back propagation (BP) neural network was established to map the acceleration of the physical model to the ground in the prototype. In order to reduce the ground vibration, experiments were carried out to meticulously evaluate the ground vibration intensity under more than 600 working conditions, and the optimal operation scheme under different discharge volumes is presented here in detail. According to the prototype test data in 2013, 2014, and 2015, ground vibrations were significantly reduced by applying the presented optimal operation principle which indicates that the presented hydro-elastic approach and the vibration attenuation operation scheme were effective and feasible.

Highlights

  • IntroductionDue to the need for a comprehensive utilization of water resources, many hydropower engineering projects with high dams and large reservoirs have been built or are currently under construction

  • Due to the need for a comprehensive utilization of water resources, many hydropower engineering projects with high dams and large reservoirs have been built or are currently under construction.The natural environment is inevitably disturbed and many environmental and ecological issues can result [1,2,3,4,5,6,7] if insufficient water resources planning, unreasonable operation schemes, and obsolete construction technology are applied

  • As enormous discharge energy energy have have been enormous discharge been built built or or are are currently currently under under construction, construction, many many researchers researchers have tried to extend the model testing technique to the vibration problem induced by flooddischarge

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Summary

Introduction

Due to the need for a comprehensive utilization of water resources, many hydropower engineering projects with high dams and large reservoirs have been built or are currently under construction. The natural environment is inevitably disturbed and many environmental and ecological issues can result [1,2,3,4,5,6,7] if insufficient water resources planning, unreasonable operation schemes, and obsolete construction technology are applied. Induced by high dam flood discharge are originally an engineering problem that has an adverse impact on structural safety and normal operation. Ground vibrations induced by the flood discharge of several large hydropower engineering projects have recently been observed, and adverse. Public Health 2020, 17, 377; doi:10.3390/ijerph17010377 www.mdpi.com/journal/ijerph

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