50results about How to "Improve pullout strength" patented technology

The invention discloses a cast-in-place pile structure. The cast-in-place pile structure comprises an anchor plate. Annular plates are arranged on the two sides of the anchor plate, the annular plates are formed by splicing two plate bodies, and the annular plates and the anchor plate are connected through pin shafts. The annular plates are provided with cast-in-situ bored piles, the number of the cast-in-situ bored piles is two, and the cast-in-situ bored piles are vertically arranged on the anchor plate. The top ends of the cast-in-situ bored piles extend to the outer side of the upper surface of the anchor plate, and the bottoms of the cast-in-situ bored piles penetrate through a pre-stressed anchor cable to extend to the outer side of the lower surface of the pre-stressed anchor cable. A main reinforcement bar is arranged between the two cast-in-situ bored piles, and the two ends of the main reinforcement bar are fixed on the cast-in-situ bored piles. A bag is further included, the top of the bag is placed on the lower surface of the anchor plate, and the bottom of the bag is placed on the inner bottom faces of the annular plates. A reinforcing plate is arranged at the connecting position of the bag and the main reinforcement bar. The cast-in-place pile structure is high in single-pile bearing capacity, high in pulling resistance, capable of enabling cast-in-place piles to be kept at the centers of pile holes as far as possible in the burying process, capable of avoiding excessive rod moving data, easy to construct, capable of driving piles into the earth conveniently, sturdy and durable, and capable of effectively achieving a reinforcement effect.