A kind of top pull construction method

Abstract

The present disclosure provides a top-drawing construction method, which includes the following steps: making a well location, using a prefabricated reinforced concrete tube well with an undrained caisson to construct a top-drawing pipe working well, using concrete to bottom the top-drawing pipe working well, The water level in the well is more than 1 meter higher than the water level outside the well; Drilling the pilot hole, the directional drilling rig is connected to the first end of the jacking drill pipe, and the second end of the jacking drill pipe is connected to the pilot bit, and the pilot hole is drilled according to the predetermined trajectory; the reaming stage , disassemble the pilot drill bit, install the reverse drill bit to the second end of the top-pull drill rod; reversely ream the hole along the channel through which the top-pull drill rod passes; The top plate, the rear anchor short rod, the hydraulic jack and the self-locking socket intubation are installed to the end of the reverse drill bit; The disclosed scheme achieves the effects of high construction precision, short construction period and small construction operation area.

Description

technical field [0001] The present disclosure relates to the field of pipeline construction, in particular to a jack-up construction method. Background technique [0002] The construction of underground pipelines in my country mainly adopts three construction techniques: open excavation laying, traction pipe and pipe jacking. However, in urban development and construction, rain and sewage separation system drainage is the trend of urban development planning. It is imperative to transform the rain and sewage combined system into a separate system in the old urban area. Due to years of development, the urban planning of the old urban area is not standardized. , the roadways are narrow and narrow, various underground pipelines are spread all over, the geological conditions are complex, the road traffic is tense, and the surface working surface is insufficient. The above three processes all have the problem of affecting the traffic or demanding the construction environment. Am...

AI Technical Summary

Problems solved by technology

However, in urban development and construction, rain and sewage separation system drainage is the trend of urban development planning. It is imperative to transform the rain and sewage combined system into a separate system in the old urban area. Due to years of development, the urban planning of the old urban area is not standardized. , the roadways are narrow and narrow, various underground pipelines are spread all over, the geological conditions are complex, the road traffic is tense, and the surface working surface is insufficient

The use of the above three processes all have problems affecting traffic or high requirements for the construction environment

Among them, the open excavation construction process is relatively simple and the construction speed is fast, but the construction damages the road surface greatly and affects the traffic for a long time. Mechanical excavation also requires that the width of the road surface cannot be lower than the radius of rotation of the excavator; the construction of the traction tube has an impact on traffic. However, the elevation control of the construction pipeline is poor, and it is easy to cause the pipeline to bend and deform due to poor geological conditions, and the length requirement of the two-way ramp section makes the traction pipeline construction unable to be applied in the narrow roadway; pipe jacking The construction technology has the advantages of large construction depth and small environmental damage. However, the size of the pipe jacking well is relatively large. The tube well enclosure covers a large area, requires a lot of space, and has a great impact on road traffic

Images