Shanghai Investigation, Design & Research Institute Co., Ltd. (SIDRI) has used Bentley’s digital engineering and digital twin technologies to overcome complex geological challenges at the Caiziba Pumped-Storage Power Station in Fengjie County, Chongqing, China.
Aerial view of a lush green mountainous landscape in Southwest China, with reservoirs and dams built between valleys generating clean energy, birds flying above, and clouds partially covering the scene.
The project is the first large-scale pumped-storage power station built in an area with complex karst geology, where caves, fissures, underground rivers, and water seepage create significant risks during underground construction.
To address these challenges, SIDRI developed a 3D geological model using drilling, geophysical, remote-sensing, and GIS data. The team then integrated the geological model with BIM and geotechnical analysis to optimize underground structures and construction methods.
Aerial view of a large hydroelectric dam in Southwest China with pipes and infrastructure, surrounded by dense green forest and mountains, showcasing clean energy production amid complex geology.
Using Bentley’s iTwin platform and other solutions, including iTwin Capture, MicroStation, OpenBuildings Designer, PLAXIS, ProjectWise, STAAD, and SYNCHRO, SIDRI created a unified digital workflow that improved coordination, design accuracy, and construction planning.
The digital approach increased cross-discipline collaboration efficiency by 40% and reduced design errors by 65%. Hydromechanical modeling time was cut by 75%, while 1,850 design conflicts were identified and resolved, saving about CNY 4.5 million in rework.
Aerial view of a large reservoir in Southwest China, surrounded by densely forested hills, with a dam structure and winding rivers showcasing the region’s complex geology and commitment to clean energy.
The project also achieved significant construction and environmental benefits. Digital design reduced concrete use by 3,200 cubic meters and steel use by 860 tons, while optimized excavation eliminated 120,000 cubic meters of rock removal. Overall, the project’s critical construction period was shortened by 42 days, with estimated construction carbon-emission reductions of more than 11,000 tons.
Bentley Year in Infrastructure (YII) and the Going Digital Awards is an annual event where global industry leaders come together to showcase infrastructure delivery and performance excellence and exchange visionary ideas for the future. Find out more on the YII site.
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