Anchor stock structure with expanded head

Abstract

The invention discloses an anchor stock structure with an expanded head. The anchor stock structure is characterized in that an end socket of an anchor stock is provided with a shrinkage-strutting device which consists of an umbrella surface, umbrella ribs, a lower brace rod, an upper brace rod, a slide block and a sleeve pipe and is of an umbrella structure; the lower brace rod is connected withthe umbrella ribs and the slide block in a hinging manner; the upper brace rod is formed by hinging two rod elements, and further, is connected with the umbrella ribs and the sleeve pipe in the hinging manner; when the anchor stock is placed, the shrunk umbrella surface and the umbrella ribs are pushed to the bottom of an anchor hole together with the anchor stock; the slide block is pushed to a limiting retainer ring to be fixed; after the umbrella surface is strutted in a cambered surface shape, grout is injected to fill a compact hole to form an anchor stock pile of an expanded head structure. Compared with the prior art, the anchor stock structure has a small grout injection amount and high bearing capacity, is used for effectively solving a problem that anchoring force is insufficient, has a simple structure, is conveniently constructed, and is particularly applicable to anchor stock pile foundation projects of easy-to-collapse soil layers, including a pebble, muddy soil and the like, of a soft soil stratum.

Description

technical field [0001] The invention relates to the technical field of pile foundation anchoring, in particular to an enlarged-head anchor rod structure used for external pull anchors of foundation pit support structures. Background technique [0002] At present, with the continuous increase of deep pile foundation projects, especially for the anti-floating requirements of deep and large basements, the application of uplift anchors brings great convenience to construction. Anchor bolts are widely used in slope stability, bridges, deep foundation pits, tunnels and underground projects because of their low material consumption, fast work efficiency and convenient construction. They are also used in reinforcement and repair of damaged structures and buildings. The bolt structure generally uses one or more steel bars to bind and weld. Although some bolts are equipped with barb structures, they cannot fully utilize the frictional resistance between the rod body and the slurry, an...

AI Technical Summary

Problems solved by technology

The bolt structure generally uses one or more steel bars to bind and weld. Although some bolts are equipped with barb structures, they cannot fully utilize the frictional resistance between the rod body and the slurry, and the pullout resistance of the bolt is low.

[0003] The anchor bolts in the prior art have insufficient anchoring force and large waste of materials, especially the drilling rig is not easy to form holes in the collapsible soil layers such as gravel and silt, which cannot meet the design requirements, and the underground pollution is serious, so it cannot be well adapted to the underground space. The development concept of energy saving, environmental protection and green construction

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