Dam strong-motion safety monitoring refers to on-site patrol inspections and instrumental observations carried out on reservoir dams during construction and operation, which generally consist of two phases: data acquisition and data analysis. It focuses on ensuring the safe and efficient operation of dams, with broader implications, richer monitoring contents and more advanced technical approaches.
There are numerous hidden risks endangering dam safety. Hazards stemming from dam design, construction and management can be mitigated through joint efforts of designers, constructors and operation managers. Nevertheless, threats triggered by natural earthquakes or reservoir-induced earthquakes are inevitable. Seismic ground motion exerts significant influences on the stability of dam bodies, dam foundations and spillways. Dams exhibit highly complex dynamic behaviors under seismic excitation. Accordingly, seismic response monitoring of dams constitutes an essential component of dam safety monitoring.
In particular, for cascade hydropower developments along the Lancang River in Yunnan, the upper Yellow River basin in Qinghai and the Wujiang River in Guizhou, scientific support derived from seismic observation data is required to assess whether seismic impacts on upstream dams will create potential safety hazards for downstream dams and formulate corresponding safety prevention measures.
Effective monitoring of reservoir-induced earthquakes at Xinfengjiang Reservoir in Guangdong enabled timely dam reinforcement and seismic hazard mitigation, serving as a typical case of earthquake prevention and disaster reduction for hydraulic structures. The Tianshengqiao Dam Strong-Motion Monitoring System recorded damages to the dam body caused by reservoir-induced earthquakes.
Applications of Geolight’s strong-motion equipment in reservoir dam safety monitoring are listed below:
1. Tianshengqiao Dam Strong-Motion Monitoring System
2. Guangzhao Dam Strong-Motion Monitoring System
3. Xiaowan Dam Strong-Motion Monitoring System
4. Guxian Dam Strong-Motion Monitoring System
5. Hongjiadu Dam Strong-Motion Monitoring System
6. Xiaolangdi Dam Strong-Motion Monitoring System
7. Three Gorges Dam Strong-Motion Monitoring System
8. Jinping Dam Strong-Motion Monitoring System
9. Nuozhadu Dam Strong-Motion Monitoring System
10. Ahai Hydropower Station Dam Strong-Motion Monitoring System
11. Jinghong Dam Strong-Motion Monitoring System
12. Shuikou Dam Strong-Motion Monitoring System