The key technical embodiment of trenchless drilling rigs

Trenchless drilling rig technology is mainly used in the construction of municipal engineering, pipeline facilities, sewers, pressure pipelines, etc. The burst (burst) pipe method, also known as the expansion pipe method, is mainly used for the replacement of pressure pipes and the replacement of sewers. The construction length is 100-900 meters, and the diameter of the pipeline is 70-1060 meters. The construction process of the burst pipe method is divided into "fixed pipe cracking process" and "pneumatic construction method". Generally, this process is selected at an interval of 1 meter to 2 meters away from the ground. The diameter of the pipe is 200-350 mm, which saves 10%-50% of the cost compared with excavation; if the distance is less than 6 meters above the ground, the diameter of the pipe is 800 mm, and the engineering cost is saved by 20%-25%. This process is generally used in Western countries,

Now, the major cities in the world no longer use the traditional excavation and pipe laying and pipe replacement construction skills, replaced by trenchless skills, especially in developed countries such as the United States, the United Kingdom and other developed countries are not allowed to excavate urban roads, and completely adopt trenchless paving. Change pipes. The trenchless drilling rig profession is a high-tech profession, and several new trenchless skills are generally selected: horizontal directional drilling method, blasting (type) pipe method, micro tunnel, pipe jacking method, and auger drilling method. When foreign countries use the above trenchless technology to lay or replace pipelines in cities, the user must pay a certain skill fee to the construction technology organizer. At the same time, there are strict regulations for users in the use process such as mud recycling.

During the construction of trenchless drilling rigs, it is forbidden to mix large and small drill pipes. Since the strength of small drill pipes and large drill pipes are not the same level, if they are mixed, they will easily crack or deform. Oil can’t be replaced with butter. Always check the grinding condition of each part. Drill pipes with too much wear and tear are also prone to risk. When connecting the drill pipe before use, the pre-tightening force of the buckle should not be too large, which will easily lead to difficulty in shattering. Moreover, the male and female buckles should be arranged, and the buckle oil should be applied frequently to prolong the service life.

The key to the construction skills of trenchless drilling rigs: During construction, the skilled personnel first understand the corrosion situation in the pipeline through the visual system, and carefully polish the inner wall with metal wire, and then temporarily install a diameter slightly larger than the old pipe reducer. After shrinking, make it easy to pass through the old pipe, and then loosen the "bundle" of the PE pipe, so that it naturally expands and fits tightly in the pipe quickly. The diameter of the pipe hardly changes significantly.

Trenchless technology refers to the laying, replacement and correction of various underground pipelines with little surface disturbance under the condition of excavation of a small part of the surface (generally refers to the excavation of a small area at the entrance and exit) through steering, directional drilling and other methods. Therefore, it has a high socio-economic effect. It mainly includes technical methods such as horizontal directional drilling, pipe jacking, micro tunnel, pipe bursting, and impact. This technology originated in the 1970s and is now used in the construction of new pipelines and the correction of old pipelines in the fields of water supply, drainage, electricity, communication, gas, etc. It can also be used in the maintenance of cultural relics and ancient buildings.

www.drilltohdd.com