This application discloses a sacrificial
pile group, sacrificial piles, and a method for positioning the sacrificial
pile group, belonging to the field of bridge foundation protection and
water flow control technology. The sacrificial
pile group is located on the upstream side of the bridge
pier and consists of a guiding zone far from the
pier and a return flow reflection zone adjacent to the
pier. A
kinetic energy dissipation zone is formed between the two zones. Through
flow diversion, return flow counter-current, and turbulent collision, the
kinetic energy of the
water flow is dissipated step by step, suppressing downflow and horseshoe vortices around the pier, and synergistically mitigating scouring and
erosion of the pier foundation. The sacrificial pile is a cylindrical structure with openings along the
water flow direction, which can divide the incoming flow and suppress turbulent superposition. The openings use non-uniform cross-section flow channels to accelerate the water flow. Multiple sets of openings can be set to adapt to
water level fluctuations, and active thrust components such as shaftless pumps can be integrated to form a combined active and passive flow control structure. The sacrificial pile adopts a modular combination design of fixed sections, pile body sections, perforated sections, and pile top sections, which is convenient to connect and highly versatile. The positioning method uses prefabricated land-based positioning and bearing reference components as a unified platform. After precise placement of connectors, the entire pile group is sunk into place, achieving high-precision positioning and stable installation. This application offers high protection efficiency and strong adaptability to various working conditions, effectively improving the
erosion and abrasion resistance of bridge foundations and reducing operation and maintenance costs.