高速公路改扩建背景下城市跨线桥拆除施工期交通组织精细化设计与多维影响评估研究

Research on Fine Design of Traffic Organization and Multidimensional Impact Assessment in Demolition Construction Period of Urban Overpass under Background of Expressway Reconstruction and Expansion

摘要:

针对高速公路改扩建背景下城市跨线桥拆除施工期的交通组织难题，深入剖析施工特点及交通影响机制，构建了交通组织精细化设计方案与多维影响评估体系。通过精细化划分施工三阶段，设计分级诱导策略与信号协同方案，并结合交通仿真技术与多维影响评估，量化施工影响。以G15沈海高速宁波姜山至西坞段改扩建工程为实证案例，从交通管制、诱导分流、公共交通优化等方面提出交通疏导策略优化方案，多维评估验证了绕行成本可控、安全风险下降，降低施工对交通的负面影响，保障施工顺利进展的同时保证施工区及周边道路的交通有序，为同类工程提供了从理论创新到实践应用的全链条解决方案。

Abstract:

Aiming at the challenges of traffic organization in the demolition and construction period of urban overpasses under the background of expressway reconstruction and expansion, the construction characteristics and the traffic impact mechanisms are further analyzed, and a refined design scheme of traffic organization and a multi-dimensional impact assessment system are established. By precisely dividing the construction into three stages, a hierarchical guidance strategy and a signal coordination scheme are designed. Combined with the traffic simulation technology and multi-dimensional impact evaluation, the construction impacts are quantized. Taking the G15 Shenyang-Haikou Expressway (Ningbo Jiangshan to Xiwu) Reconstruction and Expansion Project as a case study, an optimization scheme for traffic diversion strategies is proposed from aspects such as traffic control, guidance and diversion, and optimization of public transportation to multi-dimensionally evaluate and verify that the detour cost is controllable, the safety risk is reduced, and the negative impact of construction on traffic is lowered. While ensuring the smooth progress of the construction, the orderly traffic in the construction area and the surrounding roads are guaranteed, which provides a full-chain solution from theoretical innovation to practical application for similar projects.