Minimally-invasive non-excavation pipe jacking and pull technology

A trenchless, top-pulling technology, applied in pipeline laying and maintenance, pipes/pipe joints/fittings, machinery and equipment, etc., can solve problems such as increasing costs, affecting traffic, and affecting people's livelihood, and achieving the effect of reducing construction costs

Inactive Publication Date: 2013-11-20
JIANGSU WODI CONSTR ENG
5 Cites 21 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0002] In the current municipal construction, the pipe jacking technology is used in the rain and sewage pipeline project. The technology is relatively mature, but it can only be used to make large-diameter pipes, and it cannot solve the construction of small-diameter branch pipes.
At present, projects with small pipe diameters such as 400mm can on...
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Abstract

The invention discloses a minimally-invasive non-excavation pipe jacking and pull technology which comprises the following steps that 1, a working well and a receiving well are excavated; 2, minimally-invasive non-excavation drilling equipment is erected in the working well, and a hole is drilled towards the receiving well by a guide drilling bit till the drilling bit penetrates into the receiving well; 3, the guide drilling bit of the minimally-invasive non-excavation drilling equipment is dismounted, a back dragging reamer in a preset specification is mounted on a drilling rod of the minimally-invasive non-excavation drilling equipment, the minimally-invasive non-excavation drilling equipment is started for back dragging, and back dragging reaming begins till the back dragging reamer reams and is moved to the working well; and 4: (1), the back dragging reamer is dismounted, the minimally-invasive non-excavation drilling equipment is started, and the drilling rod passes through to the receiving well; (2), a pipe jacking machine is arranged in the receiving well; (3), a cement pipe is put into the receiving well, the drilling rod is sleeved with the cement pipe in a penetrating manner, and a pipe dragging device is mounted; and (4), the minimally-invasive non-excavation drilling equipment is started for the back dragging, the cement pipe is dragged by the pipe dragging device, and the pipe jacking machine is started and jacks the cement pipe into the hole till the cement pipe is dragged and jacked to a preset position.

Application Domain

Pipe laying and repair

Technology Topic

ReamerDrill bit +3

Image

  • Minimally-invasive non-excavation pipe jacking and pull technology
  • Minimally-invasive non-excavation pipe jacking and pull technology
  • Minimally-invasive non-excavation pipe jacking and pull technology

Examples

  • Experimental program(1)

Example Embodiment

[0015] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Here, the exemplary embodiments and description of the present invention are used to explain the present invention, but are not intended to limit the present invention.
[0016] This embodiment provides a minimally invasive, non-excavation pipe jacking process, and its work flow is as follows Figure 1-3 As shown, including the following steps:
[0017] Step one is to dig working well 1 and receiving well 2. A working well 1 and a receiving well 2 are dug at both ends of the road section where the pipeline is to be laid. After the excavation is completed, the working well 1 and the receiving well 2 are reinforced with channel steel.
[0018] Step two, drill pilot holes. Such as figure 1 , First set up the minimally invasive non-excavation drilling equipment 3 in the working well and fix it, then start the minimally invasive non-excavation drilling equipment 3, use the steering bit to drill in the direction of the receiving well 2 until the drill bit penetrates the receiving well 2 .
[0019] Step three, drag the reaming back. Such as figure 2 , First remove the pilot bit of the minimally invasive trenchless drilling equipment 3, and install a predetermined specification retractor reamer 5 on the drill rod 4; then start the minimally invasive trenchless drilling equipment 3 back towing and start Back to the reaming, drag the reaming device 5 back to ream and move to the working well.
[0020] Step four, top pull the cement pipe. Such as image 3 , (1) Remove the drag reamer 5, start the minimally invasive non-excavation drilling equipment 3, and pass the drill pipe 4 to the receiving well 2; (2) Set up a pipe jack 6 in the receiving well 2; (3) ) Put the cement pipe 7 into the receiving well, put on the drill pipe 4 and install the pipe drag 8; (4) Start the minimally invasive non-excavation drilling equipment 3 to tow, use the pipe drag 8 to drag the cement pipe 7, At the same time, start the pipe jacking machine 6 to push the cement pipe 7 into the hole until the cement pipe 7 is dragged to a predetermined position.
[0021] The technical solutions provided by the embodiments of the present invention are described in detail above. Specific examples are used in this article to describe the principles and implementation modes of the embodiments of the present invention. The descriptions of the above embodiments are only applicable to help understanding of the embodiments of the present invention. Principle; At the same time, for those of ordinary skill in the art, according to the embodiments of the present invention, there will be changes in the specific implementation and the scope of application. In summary, the content of this specification should not be construed as limiting the present invention.
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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

  • Reduce construction costs
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