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Underground Metro Interstation Horizontal-Alignment Optimization with an Augmented Rapidly Exploring Random-Tree Connect Algorithm
| 题名： | Underground Metro Interstation Horizontal-Alignment Optimization with an Augmented Rapidly Exploring Random-Tree Connect Algorithm |
| 正文语种： | 英语 |
| 作者： | Dongying Yang;Qing He;Sirong Yi |
| 作者单位： | School of Civil Engineering, Southwest Jiaotong Univ.;Dept, of Industrial and Systems Engineering and Dept, of Civil, Structural and Environmental Engineering, Univ;School of Civil Engineering, Southwest Jiaotong Univ. |
| 关键词： | Metro alignment optimization; Rapidly exploring random tree; Differential Evolution algorithm; Geographic information systems |
| 摘要： | The design of an underground metro alignment in an urban area is complex and challenging. The metro alignment constantly invades districts with high-density buildings and specially planned districts, which results in large additional expenses due to reconstruction, land requisition, demolition, vibration absorption, and environmental protection. This paper presents a method for the optimization of the horizontal alignment between metro stations to minimize the overall cost. The proposed method includes three steps: (1) low-cost path search, (2) initial horizontal alignment generation, and (3) horizontal alignment optimization. First, an augmented rapidly exploring random-tree connect (RRT-connect) algorithm is developed to search for a low・cost path, in which the buffer zone of the low-cost path defines the corridor constraint of the horizontal alignment optimization. Subsequently, based on the low-cost path, an initial horizontal alignment is generated that determines the number of design variables, i.e., intersection points. Next, within the corridor constraint, the method optimizes the intersection point coordinates and curve radius on the initial horizontal alignment using a differential evolution (DE) algorithm. A real-world metro line was studied to verify the effectiveness of the proposed optimization approach. |
| 出版日期： | 2020.11 |
| 出版年： | 2020 |
| 期刊名称： | Journal of Transportation Engineering |
| 卷： | Vol.146 |
| 期： | No.11 |
| 页码： | 04020129 |
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