Tile leaf type expansion anchor rope/rod

Abstract

The invention discloses a tile leaf type expansion anchor rope / rod. The tile leaf type expansion anchor rope / rod comprises a grouting pipe, an anchor rope, an anchor rope guide steel pipe, a guide cap and a main steel pipe; the anchor rope guide steel pipe is positioned in the main steel pipe; the anchor rope is positioned in the anchor rope guide steel pipe; the guide cap is positioned at the lower end of the main steel pipe; the upper end of the main steel pipe is sleeved with a cylindrical piston; the cylindrical piston is sleeved with a piston outer steel pipe; the piston outer steel pipe and the main steel pipe are both bonded with the upper end of the cylindrical piston; the upper ends of the piston outer steel pipe and the main steel pipe are connected through an upper bearing body; the guide cap and the lower end of the main steel pipe are connected through a lower bearing body; the outer cylindrical surface of the lower end of the cylindrical piston is provided with a step, whose outer diameter is larger than the inner diameter of the piston outer steel pipe; the outer cylindrical surface of the main steel pipe is provided with a limiting ring, whose outer diameter is larger than the inner diameter of the cylindrical piston; slurry starts to enter an expansion cavity in sequence through the main steel pipe until the expansion cavity is fully injected; and the slurry is solidified to become a standard conical anchor expansion body. The conical anchor expansion body is suitable for clay stratum, higher in firmness, convenient to operate and low in cost.

Description

technical field [0001] The invention relates to a tile-leaf type expansion anchor cable / rod suitable for foundation reinforcement of large-scale construction projects. Background technique [0002] At present, there are many kinds of expansion head anchor cable structures at home and abroad. The basic structure principle is to put the fixed anchor with bearing plate (or spring hinge), grouting pipe and anchor cable into the expansion section after the hole is formed by mechanical or rotary spraying. . The free section is an unbonded anchor cable. Compared with the early pure tension anchor cable, this structure has made great progress and is widely used. However, due to the uncontrollable shape of the expanding head, the compressed end face is not a vertical plane, and the anti-drawing effect is not good. The patent number is CN201620471941.8, and the patent name is an umbrella-type frame expansion anchor cable, which solves the above problems to a certain extent, but ther...

AI Technical Summary

Problems solved by technology

However, due to the uncontrollable shape of the expanding head, the compressed end face is not vertical, and the pull-out effect is not good.

The patent number is CN201620471941.8, and the patent name is an umbrella-type frame expansion anchor cable, which solves the above problems to a certain extent, but there are also certain problems while solving the above problems. For example, each tendon of the invention patent There are too many connecting pins between rods A, once a pin is broken, it will affect the use effect of the entire expansion body, and the cost is also high

At the same time, the invention patent is not strong enough to fix the clay layer, silt layer, sand layer, etc., and it is prone to failure of the expansion head

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