Based on the complex geological conditions of Tianxing reservoir

such as high slope at the dam abutment

medium-sized landslide at the left dam abutment

soft shale in the dam foundation

and leakage in karst zones

risk levels were identified through hazard identification and risk assessment dur ⁃ ing construction. Risk prevention and control measures were proposed

and a three-in-one intelligent construction risk prevention and control system of "intelligent monitoring

digital twin and dynamic regu ⁃ lation" was constructed. An "AI+BIM+GIS" model was established to improve the efficiency of precise risk control and construction quality. The research results can provide reference for water conservancy intelligent management

intelligent construction and digital twin to improve safety risk control under complex geological conditions.