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山岭峡谷区公路隧道群是近年来我国山区公路隧道建设发展的新形式,它在设计、施工、建设管理等方面和一般公路隧道相比具有地形陡峻、洞口地质条件复杂、桥隧比例高(洛塘至罐子沟段桥隧长度占全线91.2%,隧道长度占全线47.6%)、施工条件困难、隧道弃渣量大、投资高且风险较大等特点,本文结合武罐高速公路洛塘至罐子沟(甘川界)段工程设计对山岭峡谷区高比例桥隧路线的工程特点及主要技术问题、隧址选择的影响因素、隧道线形设计的基本原则及该路段隧道线性特点等问题进行了分析阐述。
The mountainous gorge area highway tunnel group is a new form of mountainous highway tunnel construction in recent years. It has steep terrain compared with the general highway tunnel in design, construction, construction management and so on. The geological conditions of the tunnel are complex and the ratio of bridge and tunnel is high The length of the bridge and tunnel from Tong to Jizigou section accounts for 91.2% of the total, and the length of the tunnel accounts for 47.6% of the total.), Construction conditions are difficult, the amount of spoil in the tunnel is large, the investment is high and the risk is high. Combined with the characteristics of Wu Tang Expressway, The project design of Gou (Ganchuanjie) section analyzes the engineering features and major technical problems of the high proportion of bridges and tunnels in mountain gorge area, the influencing factors of tunnel selection, the basic principles of tunnel linear design and the linear characteristics of tunnels in this section .