A kind of screw top drilling construction method

Abstract

The invention relates to a construction method for auger jacking, which includes a screw jacking system. The screw jacking system includes a jacking device, a rotating device, a threaded pipe cap and a multi-section spliceable threaded pipe joint. The outer wall of the threaded pipe joint is Threads are provided, and a plurality of threaded pipe joints are spliced ​​head to tail to form a threaded pipe body, the threaded pipe cap is connected to the front end of the threaded pipe body, and the rotating device is arranged at the rear end of the threaded pipe body for In order to drive the threaded pipe body and the threaded pipe cap to rotate, the jacking device is arranged at the rear end of the rotating device to push the rotating device, the threaded pipe body and the threaded pipe cap forward During construction, there is no need to drill pilot holes, ream holes and discharge soil first, which can simplify the construction process, increase jacking efficiency, shorten the construction period, reduce construction safety and quality risks, reduce pipeline damage and overheating of jacking equipment The risk of damage, economic and social benefits are significantly improved.

Description

technical field [0001] The invention relates to the field of pipe jacking, in particular to an auger jacking construction method. Background technique [0002] The current pipe jacking construction mainly includes excavation pipe jacking and soil extrusion pipe jacking, and excavation pipe jacking construction is divided into artificial excavation pipe jacking, mud-water balance pipe jacking, earth pressure balance pipe jacking and spiral pipe jacking. [0003] Existing spiral pipe jacking construction requires six steps: [0004] 1. Install the main jacking device behind the working well, set the screw pipe jacking machine, and install the guide bit and drill pipe for jacking operation; [0005] 2. Install the reducing joint and prepare for the hole reaming operation; [0006] 3. Install the mud discharge casing and continue the jacking operation; [0007] 4. Install the spiral mud discharge pipe, and the spiral mud discharge pipe is jacked into the mud discharge casing;...

AI Technical Summary

Problems solved by technology

[0010] From the above steps, it can be seen that the existing spiral pipe jacking construction requires more mechanical equipment, and the construction steps are cumbersome, resulting in a longer construction period and greatly increased construction safety and quality risks.

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