Ramming equipment for reducing pipe rammed pipe wall resistance and ramming construction process thereof

Abstract

The invention provides ramming equipment for reducing rammed pipe wall resistance and a through ramming process thereof. The ramming equipment for reducing rammed pipe wall resistance comprises a cutting ring, a steel sleeve pipe, a grouting resistance reducing component, a ramming hammer and a track. The track is fixedly arranged on the ground, and therefore the steel sleeve pipe can be rammed onthe track in a cut stratum in the preset direction; the cutting ring is fixedly arranged at the front end of the steel sleeve pipe, the end, not connected with the steel sleeve pipe, of the cutting ring is provided with a groove used for cutting soil, the diameter of the cutting ring is larger than that of the steel sleeve pipe, and therefore an annulus is formed between the pipe wall of the steel sleeve pipe and the cut stratum; the ramming hammer is connected with the other end of the steel sleeve pipe and can apply ramming force to the steel sleeve pipe; and the grouting resistance reducing component is arranged in the annulus on the outer wall of the steel sleeve pipe and can pump slurry into the annulus so as to reduce friction resistance between the outer wall of the steel sleeve pipe and the cut stratum. The ramming equipment has the advantages that resistance produced in the pipe ramming process can be greatly reduced, and loss of ramming force is reduced.

Description

technical field [0001] The invention relates to the technical field of shale reservoir development, in particular to a ramming device and a ramming construction process for reducing the wall resistance of a rammed pipe. Background technique [0002] Pipe ramming is a technique in which pipe ramming hammers are used to directly ram the steel pipe to be laid into the ground along the designed route to realize trenchless pipe laying. The working principle is that the large impact force generated by the rammer under the drive of compressed air directly acts on the rear end of the steel pipe, and the steel pipe as a whole overcomes the friction force and shear force between the soil layer and the pipe body, and is forced to cut into the soil. In the crossing construction, it is a practical and effective direct pipe-laying process. At the same time, it can also play an important role in providing protection for ground structures, isolating pebble layers to assist hole formation, a...

AI Technical Summary

Problems solved by technology

Because the single impact time of the rammer is extremely short, according to the momentum theorem F·t=△mv, the effective energy obtained by the pipe body is low, and with the increase of the length of the rammer pipe, the loss of the ramming force along the pipe body It will also gradually increase, and it is difficult for the front end of the casing to obtain effective propulsion energy, which often results in insufficient stamina in the later stage of the rammer

[0004] If the tamping force is increased blindly, in order to prevent the pipe from yielding and deforming, the requirements for the material and wall thickness of the pipe body are higher.

[0005] The utilization efficiency of the output ramming force of the traditional ramming tube is extremely low, and most of the ramming force is used to overcome the resistance of the tube wall to do work, and the effective ramming force actually loaded on the front end is relatively low

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