Selection and Optimization of Cave Development Tunnel Entering Cave Scheme
Yuexu port joint highway is located in the karst landform distribution area,with its karst development and complex geological conditions.For the development of tunnel bottom cave in left cave ZK7+515.5～ZK7+534 at the entrance of Yuexu No.2 tunnel,the design unit proposes the way of using piled raft structure to cross the karst cave.However,considering the factors such as construction period and cost,the construction scheme is optimized and adjusted through further geological exploration on the premise of fully understanding the geological conditions.After careful organization of construction,the construction crossing the karst cave is completed successfully and safely,which not only ensures the construction period and quality,but also achieves good benefits,accumulating experience for the entering cave construction in the same type of projects in the future.
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