盾构隧道施工对城市沥青路面影响的风险评估

The Risk Evaluation on Effect of Shield Tunnel Construction on Urban Asphalt Pavement

各大城市内的地铁隧道,一般都选择在道路下穿行,因此,不可避免地会对城市道路路面造成各种破坏。文章主要分析了城市沥青路面由于盾构施工可能造成的各种破坏类型,讨论了路面寿命周期内费用构成,并采用公路沥青路面使用性能评价方法和标准,建立了由于盾构施工导致沥青路面出现最大沉降量与其使用性能和损失费用三者之间的风险评估模型,文末结合工程实例进行了模型应用研究与讨论。

Generally, the subway tunnels in soft soil area are built under the pavement. Therefore, it is inevitable that the urban roads are often damaged and broken during the shield tunnel construction. In this paper the different breakage types due to shield tunnel construction are analyzed, the cost composition in the whole life of road is disscussed, and then a risk evaluation model on three parameters such as the maximum settlement, pavement performance and lost cost for urban asphalt roads is set up. In the end, a case study was shown.