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Blog de selfdrillinganchor
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The use of self drilling anchor bar for slope reinforcement publié le 17/09/2016 à 08:57
SDA bolt has better properties than solid steel tube with the same cross section area due to the higher buckling and bending stability in the same tensile load and resistance.
When dynamic pressure grouting with cement suspension is used during drilling, the cement slurry and the surrounding soil form mechanical interlocking without casing. The mechanical interlocking effect enhances the shear adhesion. This means that the displacement of the non prestressed grouting pile head is only a few millimeters.
As a micropile, SDA bolt can be used as a tensile pile and also a compressible pile. It can be installed according to the certain angle of inclination to provide the solution of the mesh pile.
The use of self drilling anchor bar in the poor geological conditions for slope reinforcement will obviously speed up construction progress and save project cost. Moreover, self drilling anchor will successfully solve the problems of hole collapse encountered in the sand layer and weathered strata, and drilling difficulties of rock bolt and cable bolt.Because of its unique construction technology and lots of advantages, self drilling anchor is well worth popularizing and applying.
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