A soil nail diameter expanding device and diameter expanding method
A soil nailing and soil layer technology, which is applied to earth drilling, drilling equipment and methods, and excavation, can solve the problems of waste, uniformity, and increase the tensile bearing capacity of the anchorage section of soil nails, and achieve the effect of reducing project cost
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[0023] The present invention will be further described below in conjunction with accompanying drawing.
[0024] Such as Figure 1-6 As shown, the novel soil nail diameter expansion device of the present invention includes a mandrel knob 1, a mandrel 2, a mandrel knob advance and retreat control device 10, a drill rod 3 and a cylindrical gear 4, and the mandrel knob 1 and the cylindrical gear 4 pass through the mandrel 2 connection, the cylindrical gear 4 is inside the drill pipe 3, the first diameter expansion wing 6-1 and the second diameter expansion wing 6-2 are respectively connected to the drill pipe 3 by the connecting piece 5, the first diameter expansion wing 6-1 and the second diameter expansion wing 6-2 The second expanding wing 6-2 is provided with a rack 9, and the rack 9 meshes with the cylindrical gear 4. The first expanding wing 6-1 is provided with a dovetail groove 7. Correspondingly, the second expanding wing 6-2 A dovetail tenon 8 is provided on the top, an...
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