Automated design of bridge single-pile based on graph neural networks
摘要
As critical components in bearing and transferring superstructure loads, bridge pile foundations play a decisive role in ensuring structural safety. However, current single-pile design practices heavily rely on iterative normative calculations and engineering expertise, resulting in inefficiencies and labor-intensive work. To overcome these limitations, this study proposes an intelligent single-pile design method based on Graph Neural Networks (GNN), termed PileGNN, which enables end-to-end automated generation of pile design drawings from geological maps. This approach introduces two topological modeling strategies: edge-driven graph representation and node-driven graph representation. Through deep learning on graph data, PileGNN predicts the penetration ratio of each stratum as an intermediate variable, thereby transforming the pile-sizing problem into a linear combination. To validate this method, real-world engineering case studies were conducted. Results show that 95% of the designed piles meet the safety margin requirements specified by design codes, with an average deviation of less than 4% compared to engineer-designed schemes. Moreover, the entire process can be completed in under 2 s—just 0.1% of the time required by manual design. The model outputs can be directly converted into CAD drawings without manual drafting. Overall, PileGNN demonstrates high accuracy, efficiency, and reliability, offering a theoretical basis for AI-driven automation across the whole bridge system in the future.