Annular cutting pipe pulling construction process and annular cutting pipe pulling drilling machine

Abstract

The invention provides an annular cutting pipe pulling construction process and an annular cutting pipe pulling drilling machine. With regard to technical difficulties of replacing and maintaining a non-excavation pipeline, the annular cutting pipe pulling drilling machine is used for cutting along the outer wall of an old pipeline to be replaced and forming an annular space so as to realize thorough separation of the old pipeline to be replaced and surrounding soil. The annular space formed along the outer wall of the old pipe to be replaced creates a good construction premise for subsequentdecoupling the old pipeline to be replaced and mounting and laying a new pipeline. Since the milled annular hole space is larger than the outer diameter of the original pipeline, in the construction process, construction difficulties caused by structural damage of the old pipeline to be replaced can be avoided; and meanwhile, a new pipe with the same specification or a pipeline with a larger specification can be re-laid according to design requirements in a re-reaming mode, so that the defect that the old pipe can only be damaged to pollute the environment or the flow area of the pipeline canonly be reduced in the process of updating traditional pipelines is completely overcome, and a new idea and a feasible scheme are provided for updating and maintaining of the old pipeline to be replaced in a city.

Description

technical field [0001] The invention relates to the technical field of non-excavation construction, in particular to a construction technique of circumcision and extubation and a drilling rig for circumcision and extubation. Background technique [0002] Trenchless refers to the use of various geotechnical drilling equipment and technical means to excavate a very small part of the surface (generally refers to small-area excavation at the entrance and exit) through guided and directional drilling. And the new construction technology for repairing various underground pipelines will not hinder traffic, will not damage green land and vegetation, will not affect the normal life and work order of shops, hospitals, schools and residents, and solve the traditional excavation construction. Disturbance, damage and adverse effects on traffic, environment, surrounding building foundations, thus having high socio-economic effects. [0003] Trenchless construction technology is widely us...

AI Technical Summary

Problems solved by technology

[0004] The new pipe can be re-buried by slotting, and the old pipe can be taken out directly. The disadvantage of this method is that the project volume is large and the investment is high. It not only destroys the existing infrastructure, but also easily causes large-scale traffic jams, which seriously affects the normal work and life of residents and damages the environment. create pollution;

[0005] The split pipe method (expanding pipe method) is to use a drill with a split pipe head to break the old pipe, and squeeze the pipe fragments into the surrounding soil, and at the same time pull a new pipe in to complete the old pipe at one time. The process of abolishing and laying new pipes; the disadvantage of this method is that the extrusion and vibration when breaking old pipes will cause public hazards to buildings around the city, and the broken old pipes and crude oil mud and other waste dirt in the pipes will remain in the soil Among them, polluting the surface soil layer, some non-degradable substances will affect the growth of plants and the ecological environment

[0006] Therefore, how to take out the underground pipeline from the ground in a non-excavation way to realize the replacement and repair of the pipeline in the true sense is an urgent technical problem that needs to be solved at present, and the pipeline is buried underground all the year round, and the soil around the pipeline will be damaged. Under the action of gravity, the pipe is squeezed very firmly. The traditional non-development pipe extraction process cannot overcome the extrusion force of the soil layer on the pipe and the pipe can be pulled out smoothly. Therefore, the technology of taking out the old pipe in a non-excavation method is realized. The key is how to solve the extrusion force of the soil around the pipeline

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