Non-excavation chambering machine, chambering drill bit and chambering method adopting non-excavation chambering machine

Abstract

The invention relates to a non-excavation chambering machine, a chambering drill bit and a chambering method adopting the non-excavation chambering machine. The chambering machine comprises a coilingblock system, a forward and reverse circulation system and a hydraulic power drive system, and the chambering machine has a forward circulation running form and a reverse circulation running form. Thechambering drill bit is provided with cutting tool teeth and a slag suction port connected with a suction pipe of the non-excavation chambering machine. The chambering requirement can be met throughone-time chambering, disturbance on soil around the hole wall from level-by-level chambering is reduced, the hole wall collapse risk is reduced, and the risk that in traditional non-excavation chambering and hole cleaning procedures, soil poor in fluidity in holes cannot be thoroughly removed, and consequently pipeline backward dragging fails is avoided. The provided chambering method comprises the steps including guiding hole forming, one-time chambering and pipe backward dragging. The operation efficiency is improved, construction consumption is reduced, the water consumption is reduced, theseparated soil can be subjected to truck loading and conveyed away, pollution is controlled, pollution caused to the environment due to repeated muck conveying-out is reduced, and the dirt removing workload is reduced.

Description

technical field [0001] The invention relates to a construction technique for non-excavation pipeline laying, in particular to a non-excavation reaming machine, a reaming drill bit and a reaming method thereof. Background technique [0002] At present, the construction principle and process of traditional horizontal directional drilling trenchless pipeline laying are as follows: firstly, the horizontal directional drilling machine digs the pilot hole according to the pipeline design trajectory, then expands the hole step by step, then performs the hole cleaning process, and finally pulls the pipe back. The disadvantages of the traditional horizontal directional drilling trenchless pipeline laying process are as follows: [0003] 1) The step-by-step reaming process is inefficient. Generally, a pipe with a diameter of 1200mm is generally reamed to 1400-1500mm, and generally requires 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500 step-by-step reaming...

AI Technical Summary

Problems solved by technology

[0004] 2) The cleaning process is inefficient

[0005] 3) High construction risk

Therefore, the mud in the hole is the biggest risk source for the failure of the non-excavation pullback pipeline. Usually the PE pipeline is broken or flattened, and the steel pipe is squeezed in the hole and cannot be pulled. 90% of the reasons for the failure of these pipes come from the step-by-step hole expansion and hole cleaning process. It is impossible to accurately judge the amount of remaining mud in the hole, and the degree of mud accumulation when pulling back the pipeline

[0006] 4) Large consumption of water

[0007] 5) Difficult to control mud pollution

The successful experience of the back-towing pipeline requires that the back-towing pipeline cannot be stopped for 24 hours, and the shorter the time for the back-towing pipeline, the better. This makes it difficult to thoroughly clean and transport the mud in the back-towing pipeline, and it is difficult to control the pollution of the mud

[0008] 6) In the whole process of reaming, cleaning and pulling back the pipeline, the workload of clearing and transporting mud is heavy

[0009] 7) It is impossible to carry out the construction of the pebble layer and the backfilling layer of construction waste

Therefore, the non-excavation construction team is not sure about the success of the pebble layer construction. The main reason is that only the soil is stirred into mud to be extruded in the reaming hole, and the pebbles are deposited at the bottom of the hole, and it is difficult to squeeze out of the hole with the mud, resulting in jamming. The drill bit is stuck, and the pull-back pipe is stuck, making this formation a difficult problem that cannot be solved in trenchless construction

Although there is chemical mud application, it cannot eliminate the risk that the pebbles in the hole will not be cleaned and bring back to the pipeline.

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