Tunnel shield support non-blasting excavation method and equipment

Abstract

The present application relates to the technical field of tunnel construction, in particular to a tunnel shield support non-blasting excavation method and equipment, the excavation method comprises four steps of drilling and pumping, concrete solidification, excavation of the surrounding rock and waterproof treatment, the method forms a concrete closed-loop shield support system by drilling and pumping in advance, a stable closed-loop support structure is formed before the excavation of the surrounding rock, effectively preventing the large deformation of soft rock and the rock burst phenomenon caused by stress release in hard rock during tunnel excavation; the system anchor rod, concrete spraying construction and explosive blasting process in the traditional support system are cancelled, which is safe and reliable, and has high economic benefits. The excavation equipment shares a propulsion mechanism through the spiral drill module and the reverse circulation down-the-hole drill module, without the need for separate propulsion devices for the two drill bits, the feed is achieved by driving the arc-shaped limiting piece with a chain, and the limiting block, the worm and the ring worm gear transmission self-locking function are matched to ensure the positioning accuracy of the drill bit during drilling, and to reduce the complexity of the equipment structure and the purchase and maintenance cost.

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