Carst region double-arch road tunnel construction method
A technology for road tunnels and construction methods, which is applied to tunnels, tunnel linings, underground chambers, etc., can solve the problems of cumbersome construction steps, long construction period, and large investment in equipment, and achieve safe and reliable construction, short construction period, and fast construction. Effects in simple steps
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[0061] Such as figure 1 Shown is a construction method for a double-arch highway tunnel in a karst area. The constructed double-arch highway tunnel is divided into three construction sections: the entrance section of the tunnel, the connecting section in the middle of the tunnel, and the exit section of the tunnel from the entrance to the exit of the tunnel, and includes The two left and right tunnel main tunnels bounded by the middle partition wall 1, the tunnel entry section and the tunnel exit section are weak sections with complex geological conditions and broken surrounding rock, and the middle connecting section is the surrounding rock with good surrounding rock conditions. rock solid section. In this embodiment, the constructed double-arch highway tunnel is spread out in a direction of nearly 270°, the starting and ending pile numbers of the left line are ZK274+579.849~ZK274+982.245, and the length is 402.396m; the starting and ending pile numbers of the right line are ...
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