Abstract: roads, railways and other works when pass through the mountainous area can inevitably encounter the fold structure. This article refer the recent research, and according to my own ponder,the tunnel when constructed in the synclinal-shaft, the anticlinal-shaft and the fold limb will have different rock mechanical property, rock burst intensity and hydrogeological property: when the tunnel axis and the axial line of the fold are parallel, the rock burst possibility is bigger than when vertical;The tunnel when constructed in anticlinal-shaft,the rock burst possibility and intensity is lower than located in the fold limb department and synclinal-shaft,and in this case,the hydrogeological condition is also favorable.The tunnel plan and construction may select the position that the tunnel axis is vertical to the fold axis,and simultaneously the position is located in anticlinal shaft,so that it can weaken the influence of rock burst and hydrogeological condition.
Key words:fold structure;tunnel route selection;structure spot; rock burst; hydrogeological condition
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