脆弱性视角下的城市综合管廊路径优化模型

Path Optimization Model of Urban Utility Tunnel Based on the Vulnerability Perspective

城市地下综合管廊是实现地下空间资源可持续发展的重要措施之一,大规模敷设综合管廊使之形成管廊网络势在必行,而综合管廊路径规划对综合管廊网络形成至关重要。本文在脆弱性视角下对城市地下综合管廊路径规划进行定量研究。首先基于地质脆弱性与脆弱路段内涵,建立地质脆弱性与脆弱路段评价指标体系与评价模型;其次,以地质脆弱性与脆弱路段等作为约束条件,建立多约束最短路径优化模型,并对基本蚁群算法进行改进求解;最后用不同方法对同一工程实例进行综合管廊路径优化。研究结果表明,脆弱性视角下的多约束路径优化模型计算过程简单、实用性强,且更符合工程实际,为城市地下综合管廊规划提供了新视角和新方法。

Utility tunnel is one of the important measures to realize the sustainable development of underground space resource. Path planning is essential to the utility tunnel network formation based on large-scale utility tunnel construction. The quantitative study on the path planning of utility tunnel from the view of vulnerability has been focused on. Firstly, the evaluation index system and evaluation model of geological vulnerability and vulnerable sections are established respectively based on the connotation of geological vulnerability and vulnerable sections. Secondly, the multi-constrained shortest path optimization model is established with geological vulnerability and vulnerable section as constraints, and it is solved with improving the basic ant colony algorithm. Finally, three different methods are used to optimize the utility tunnel route for the same engineering instance. The result shows that it is necessary to consider the constraints of vulnerability, and the validity of the multi-constrained utility tunnel route optimization model under the improved ant colony algorithm and the applicable conditions are verified. The multiconstrained path optimization model under the vulnerability perspective is simple, practical and more in line with engineering practice, which provides a new perspective and a new method for the utility tunnel planning, and provides a basis for the formation of large-scale utility tunnel network.