Spiral pipe jacking machine and hard rock advanced cutting device thereof

Abstract

The invention discloses a spiral pipe jacking machine and a hard rock advanced cutting device thereof. The hard rock advanced cutting device comprises a conventional cylinder and a rotating cylinder which is in butt joint with the conventional cylinder in the axial direction and rotates relative to the conventional cylinder; a feeding pipeline used for supplying sand shot slurry is arranged in the conventional cylinder; a conveying pipeline connected with the feeding pipeline through a feeding pump is arranged in the rotating cylinder; the conveying pipeline is provided with a high-pressure spray head; and the feeding pump is started, and the sand shot slurry in the feeding pipeline is pressed into the conveying pipeline and then sprayed out through the high-pressure spray head. When the rotating cylinder rotates, the conveying pipeline drives the high-pressure spray head to rotate synchronously, the high-pressure spray head sprays the sand shot slurry to a hard rock stratum in the circumferential direction, the hard rock stratum is impacted and cut before a tool bit, the tool bit is prevented from being seriously abraded, the tool bit replacement frequency is reduced, the spiral pipe jacking machine does not need to be dismounted when no hard rock exists, the mounting time is saved, and the construction efficiency is high.

Description

technical field [0001] The invention relates to the field of excavation equipment, in particular to a screw pipe jacking machine and a hard rock advance cutting device thereof. Background technique [0002] With the development of the city, there are more and more underground pipelines. Since the construction of the screw pipe jacking machine only needs to dig wells at the starting point and the end point, it can improve the work efficiency and have a small impact on the ground, making the construction of the screw pipe jacking machine a A very widely used construction method. [0003] Limited by its own performance, the cutter head of the screw pipe jacking machine can only excavate the stratum with soft geology, and there are different degrees of hard rock distribution or completely rocky stratum underground in many areas, which makes the excavation difficulty of the screw pipe jacking machine greatly increased. It is even impossible to excavate at all, and the hardened g...

AI Technical Summary

Problems solved by technology

[0003] Limited by its own performance, the cutter head of the screw pipe jacking machine can only excavate the stratum with soft geology, and there are different degrees of hard rock distribution or completely rocky stratum underground in many areas, which makes the excavation difficulty of the screw pipe jacking machine greatly increased. It is even impossible to excavate at all, the hardened ground will wear the cutter head a lot, and frequent withdrawal of the cutter will greatly reduce the construction progress and affect the construction efficiency

Based on this, the cutter head of some pipe jacking machines is retracted when it encounters hard rock, and rock-breaking devices such as flame cutting devices or cone-shaped soil-breaking devices are installed on the ground before continuing to cut hard rock. The installation can only be done after the machine is returned, which still affects the construction efficiency

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