Follow-up drilling machine for down-hole hammer casing pipe

Abstract

The invention relates to the technical field of an engineering pile machine, and particularly relates to a follow-up drilling machine for a down-hole hammer casing pipe. The follow-up drilling machine for the down-hole hammer casing pipe comprises a supporting machine, a power head, a power head control device, an impact device, a vibration hammer, a drill rod and a casing pipe; the supporting machine comprises a base, a stand column, a winding machine, an operation chamber and a drawing steel wire rope; the impact device comprises a down-hole hammer and an air compressor; the casing pipe is sleeved outside the drilling rod; a top pulley group is arranged at the upper end of the stand column; and guide sliding rails are respectively arranged at the two sides. The follow-up drilling machine is characterized in that the power head is arranged on the guide sliding rail at the front side of the stand column; a movable pulley group I and a movable pulley group II are arranged on the guide sliding rail at the back side; the power head is connected with a power head control device through a speed adjusting device; the drill rod is connected below the power head; a down-hole hammer is connected below the drill rod; the casing pipe is arranged outside the down-hole hammer and the drill rod; a fixed pulley group I and a fixed pulley group II are arranged on the base; a cross beam is arranged at the lower part of the casing pipe in front of the base; and the drill rod is a bladeless steel pipe. With the adoption of the structure, the follow-up drilling machine provided by the invention has the advantages of simple structure, low gravity center, high stability, low equipment cost, rapidness of hitting a rock layer and the like.

Description

technical field [0001] The invention relates to the technical field of engineering pile machines, in particular to a down-the-hole hammer casing follow-up drilling rig. Background technique [0002] At present, in order to solve the problem that the long auger drilling rig is difficult to enter the rock, and prevent the hole wall from collapsing during the construction of the bored pile, which will cause the stuck drill and affect the quality of the pile body; the mud retaining wall will cause problems such as increased cost and environmental pollution; One is to use the DTH hammer casing to follow up the equipment and construction technology for forming holes in the retaining wall. Down-the-hole hammer casing follow-up is currently widely used in the market. Since the power head does not have a speed control device, the drilling speed is very slow. There are mainly three methods for casing follow-up: 1. Immersion method, the casing is sunk into the ground by hammering, vib...

AI Technical Summary

Problems solved by technology

However, the above-mentioned dual-drive casing drilling rig technology has the following disadvantages: Since the outer casing and the drill pipe are driven by the top of the power head, the casing and the power head are not easy to separate and must be pulled out of the ground at the same time as the drilling tool, and the long helical drill hole is directly poured. It’s okay, but it’s hard to guarantee the quality of reinforcement cages and cast-in-place construction piles under rock construction with down-the-hole hammers

The power head of the casing drilling rig can not only drive the drilling tool at the top, but also drive it at the middle or lower part of the drilling tool. The height of the power head of the drilling rig relative to the ground can be lowered by more than 1 / 2 compared with the top drive. The disadvantages are: 1. . Since the pulley block at the top of the column adopts the multiplier type pulley, and the side of the column adopts double driving power heads, which not only increases the weight of one side of the column, but also makes the force on the front and rear of the column uneven, resulting in a larger bending moment of the column and increasing the The weight of the top pulley block greatly reduces the stability of the pile driver

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