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Precautions when using rotary excavators

Rotary drilling rig has obvious advantages in the construction of bored piles in subway engineering, strong applicability, high degree of automation, low labor intensity, high drilling efficiency, good fluff quality, and low environmental pollution. Can significantly improve the construction efficiency and engineering quality. When the construction method and construction technology are reasonably selected, the materials, financial resources, manpower and other resources can be saved to the maximum extent. For enterprise efficiency and social security has a win-win significance.

The verticality of soil hole and the installation of steel casing have great influence on the verticality of pile body;

⑵ The rational use of concrete casing and steel casing for positioning can effectively shorten the positioning time of the drilling rig and improve the construction efficiency;

(3) In soft rock and soil layer, the rotary bucket is used to dig the hole at one time; in hard rock, the auger drill is used to drill the hole first, and then the rotary bucket is used to expand the hole.

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