城市水下浅埋暗挖隧道最小覆盖层厚度确定方法

Determination Method of Minimum Overburden Thickness of Urban Underwater Shallow-buried Dug Tunnel

摘要:

为了保证隧道的交通功能，实现城市水下隧道与近岸道路的连接，解决矿山法隧道水下段最小覆盖层厚度问题，通过对国内外水下隧道最小覆盖层厚度确定方法的讨论，针对江西赣州市蓉江四路章江隧道水下段最小覆盖层厚度，提出一种更为经济、合理的确定方法。该方法通过采用工程技术措施，以风险分析、数值计算、监控量测为手段，确定施工风险大小，结合交通功能、经济分析、社会效益，确定最小覆盖层的优选方案。最后，对提出的确定方法进行总结。

Abstract:

In order to ensure the traffic functions of tunnel, to realize the connection of the urban underwater tunnel and the off-shore roads, to solve the problem of the minimum overburden thickness of tunnel underwater section by mining method, through the discussion on the determination method of the minimum overburden thickness of underwater tunnel at home and abroad, and aiming at the minimum overburden thickness of the underwater section of Zhangjiang Tunnel in Rongjiang Road IV of Ganzhou City in Jiangxi Province, a more economic and reasonable determination method is proposed. The construction risk is determined by this method through the adoption of engineering technical measures and by means of risk analysis, numerical calculation and monitoring measurement. Combined with the traffic functions, economic analysis and social benefits, the optimization scheme of the minimum overburden thickness is determined. Finally, the proposed determination method is summarized.