Construction method of expanded-head prestressed concrete anchor rod

Abstract

The invention discloses a construction method of an expanded-head prestressed concrete anchor rod. The anchor rod is formed by pouring and solidifying an anchor rod framework system and prestressed concrete. The construction method comprises the specific construction implementation steps of conducting drilling and positioning; drilling a hole to a designed depth, carrying out jet grouting or mechanical reaming construction to form a hole, and lowering a pull rod, namely a main rib, of the anchor rod and an expanded head framework or a fixed-diameter anchor head framework; after the pull rod, namely the main rib, of the anchor rod, an expanded head and the expanded head framework are in place, expanding the expanded head to the designed size through an expansion mechanism, and then formingthe pouring concrete on the expanded head, namely an expansion body section and a non-expansion body section until the rated strength required by design and specifications are reached; enabling the pull rod, namely the main rib, in the anchor rod to use a device and method capable of applying prestress to apply prestress to the main rib; applying the prestress required by the design and specifications, conducting locking after operation is completed, and then removing the to-be-removed equipment device for applying the prestress; and enabling a whole part of the anchor rod to be composed of the poured concrete and an anchor rod framework body.

Description

technical field [0001] The invention relates to a fixed diameter or enlarged head prestressed concrete anchor and its construction method. It is an anchor rod application device for overcoming the elastic deformation of the free section of the anti-floating fixed diameter or enlarged head anchor rod body. Stressed concrete anchor pile and construction method (post-tensioning method). Background technique [0002] The applicant's CN2020103929335 is a post-tensioning prestressing device for anchor rods, which includes a force applying machine 10, a bracket or / and a bracket plate, a steel bar holder, a bracket or a bracket plate in the center of which the upper end steel bar of the anchor rod ( The hole through which the main reinforcement) passes; the lower end of the anchor rod reinforcement is fixed in the borehole of the anchor rod stratum or rock formation, and the upper end reinforcement is clamped by the reinforcement holder after the hole passed through, and is applied ...

AI Technical Summary

Problems solved by technology

But it does not involve the construction method of enlarged head or fixed diameter or prestressed concrete anchor (pile)

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