The Working Principle and Features of Self-drilling Anchor Bar

29/apr/2015 03:46:21 sinorockzqq Contatta l'autore

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Self-drilling anchor bar first applied in coal mine in the 1970 s.After the 80 s it has began to successfully used in our country.It consists of The Hollow Anchor Bar, Coupler ,Nut,Plate,The positioning set. The working principle and features of self-drilling anchor bar: The drill pipe and bolt combine together which do not need to launch in the soft soil layer .On the other hand it can save time and grout with the hollow anchor bar.Finally,It can definitely improve grouting effects. Using the full length standard threaded rods is convenient to install the plate and extend with another anchor bar.So it can be constructed in a narrow space.For the more than 10 meters long anchor,the positioning set can ensure the anchor bar center and increase the covering layer of gravel and the PE layer from the free side of the anchor bar can also exert prestress.
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