城市生态敏感区高速公路隧道洞口高边坡优化设计

Optimization Design of High Slope of Highway Tunnel Entrance in Urban Ecological Sensitive Area

从技术、建设成本、生态保护等多角度,对穿越城市生态敏感区高速公路隧道洞口高边坡设计方案进行分析,提出将原设计长122 m,最大高度约66 m的七级路堑高边坡调整为长105 m的浅埋暗挖隧道,结果表明,优化后的设计方案技术可行。最后提出,进行穿越城市生态敏感区高速公路设计时,充分利用现场征地拆迁条件,不仅能节约用地、保护环境,而且可有效地降低建设成本。

From the perspectives of technology,construction cost and ecological protection,this paper analyzes the design scheme of the high slope of the highway tunnel crossing the urban ecological sensitive area,and proposes the 7-level high slope with the original design length of 122 m and maximum height of about 66 m.Adjusted to a shallow buried tunnel with a length of 105 m,the results show that the optimized design is technically feasible.Finally,it is proposed that when the highway design through the urban ecological sensitive area is designed,making full use of the land acquisition and demolition conditions on the site can not only save land and protect the environment,but also effectively reduce construction costs.