How to turn when trenchless pipe-laying rig works?

Although the drill pipe is hard, it will bend when it reaches a certain length, not even one meter, but it can bend when it reaches 10 meter, 20 meters or more. This is because of the toughness of steel, the direction of the drilling rig is controlled by the drill bit, and bentonite mud lubrication is needed to transport the mud and other sundries, which can protect the drilled hole wall from collapse.

Trenchless technology originated in 1970s and was introduced to China in 1990s. Widely used in water supply, drainage, electric power, communication, gas and other fields of new pipeline construction and old pipeline repair, but also for the protection of cultural relics and ancient buildings.

Extended data:

Construction preparation work

1, the pipe jacking working well is constructed, and a sump is set in the well to facilitate pumping.

2. Set the backrest. After the foundation of the working well is set, the backrest is set according to the direction of the pipeline.

3. Install the guide rail. The firm and accurate installation of guide rail has great influence on the quality of pipe jacking. Therefore, the installation of guide rail is determined according to pipe diameter, pipe slope and jacking direction. Jack-up direction must be straight, elevation and axis accurate. The guide rail can be made of light rail.

4. The jack is used to jack up the equipment, and the head is provided with a tool pipe with a cutting edge, which is used for soil cutting, pipe protection and guidance. In order to prevent the soil from collapsing, a grid is set in the tool tube.

5. Set a movable working platform above the working pit of other equipment. Generally, 30 # channel steel is used as the beam, and the square wood is laid on it. Hoist the lower pipe with a temporary crane, and shake your head with a derrick when unearthed.

6. Note: Enclosure measures must be taken around the working pit of pipe jacking, with colored steel tiles for enclosure, rainproof canvas for protection, and eye-catching warning signs. During jack-up, passing vehicles should slow down, and large tonnage and heavy vehicles are prohibited from passing.

References:

Baidu encyclopedia-wuhao