Deep and thick rockfill layer down-the-hole hammer hole guiding and rotary jet drilling and spraying integrated pile forming equipment

Abstract

The invention relates to the technical field of pile forming construction, and discloses deep and thick rockfill layer down-the-hole hammer hole guiding and rotary jet drilling and spraying integrated pile forming equipment which comprises an all-in-one machine, the all-in-one machine comprises a rack, the rack is provided with a power head, an air slurry conveying connector and a drill rod, the lower portion of the drill rod is provided with a down-the-hole impact head, and the power head drives the drill rod to drill a hole guiding in a rockfill layer; the air slurry conveying connector is connected with a rotary spraying air compressor, a down-the-hole hammer air compressor and a high-pressure grouting pump, and a nozzle is arranged on the lower portion of the drill rod. In the process that the power head drives the drill rod to drill the guide hole to the designed elevation of the pile bottom, the down-the-hole hammer air compressor drives the down-the-hole impact head to impact and drill, the jet grouting air compressor jets high-pressure gas in the pile hole in a rotary mode through the nozzle, and the high-pressure grouting pump jets grout in the pile hole in a rotary mode through the nozzle; in the process that the power head drives the drill rod to be lifted in the pile hole, the jet grouting air compressor jets high-pressure gas in the pile hole in a jet mode through the nozzle, and the high-pressure grouting pump jets grout in the pile hole in a jet mode through the nozzle till the grout reaches the designed reinforcement height of the pile top.

Description

technical field [0001] The patent of the present invention relates to the technical field of pile-forming construction, in particular, to the pile-forming equipment integrating DTH hammer leading hole and rotary jet drilling and spraying in deep rock-filling layers. Background technique [0002] To carry out high-pressure rotary jetting foundation treatment and reinforcement in the deep rock-fill layer, the rock-fill layer is usually pre-drilled with a down-the-hole hammer, and then lowered into the casing to protect the wall, and then the lower stratum is drilled and high-pressure jet grouting is carried out. . [0003] In the prior art, the construction efficiency is low due to the addition of lead holes and the steps of lowering the casing in the overall construction, and at the same time, due to the large gap between the filling stones in the stone filling layer, when the slurry is sprayed, The grout is easily lost from the gap between the fillings, it is difficult to c...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide integrated pile-forming equipment for DTH hammer pilot hole and rotary spray drilling and spraying in deep rock-fill layers, aiming to solve the problem of poor pile-forming effect in pile-forming construction in deep rock-fill layers in the prior art

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