Prestressed anchor rods with anti-openings to prevent pulling out of anchor holes
A prestressing and anchoring technology, which is applied in the installation of anchors, sheet pile walls, mining equipment, etc., can solve the problem of not being able to adapt to the immediate support of weak rock and soil, restricting the application and development of rock and soil anchoring technology, and reducing the anchoring force, etc. problem, to achieve the effect of improving the load transfer mechanism and optimizing the load transfer mechanism
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Embodiment 1
[0032] Example 1 When in use, (1) drill hole 3 on rock and soil body 1 according to the design requirements, and carry out the construction of pad 5 at the mouth of hole 3; Then the top 8 of the anchor rod body 4 passes through the anchor rod hole 16 at the bottom until the expansion tooth bowl 10 is pushed to the bottom end of the anchor rod body 4, so that the conical side of the expansion plug 9 and the inner surface of the expansion tooth bowl 10 teeth 11 (3) place the expansion tooth bowl 10 together with the anchor rod body 4 at the bottom of the borehole 3; (4) by applying a thrust downward along the axial direction of the anchor rod body 4 to the upper end of the round tube sleeved on the anchor rod body 4, and simultaneously The anchor rod body 4 axially applies an upward pulling force to the upper end of the anchor rod body 4, so that the frustum-shaped expansion plug 9 carried by the bottom end of the anchor rod body 4 approaches the bottom of the expansion tooth b...
Embodiment 2
[0033] Example 2 When in use, (1) drill hole 3 on rock and soil body 1 according to the design requirements, and carry out the construction of pad 5 at the mouth of hole 3; Make the top 8 of the anchor rod body 4 pass through the anchor rod hole 16 at the bottom until the expansion tooth bowl 10 is pushed to the bottom end of the anchor rod body 4, so that the conical side of the expansion plug 9 coincides with the inner surface of the teeth 11 of the expansion tooth bowl 10 ; (3) place the expansion tooth bowl 10 together with the anchor rod body 4 at the bottom of the borehole 3; (4) adopt a circular tube shorter than the anchor rod body 4, and put it on the anchor rod body 4, that is, the lower end of the circular tube is on the opposite side. On the bottom of the expansion tooth bowl 10 at the mouth, and then add a backing plate 6 on the top 8 of the anchor rod, that is, even if the top 8 of the anchor rod passes through the anchor hole in the center of the backing plate ...
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