Bearing-platform-free UHPC pile and column integrated structure and construction method thereof

Abstract

The invention discloses a bearing-platform-free UHPC pile and column integrated structure, which comprises a large-diameter UHPC pipe pile, a prefabricated pier column and a cast-in-situ bored pile. Apier column socket hole is reserved in the top of the large-diameter UHPC pipe pile, and the UHPC pipe pile is spliced by a plurality of UHPC pipe sections; the prefabricated pier column is located above the UHPC pipe pile and can be quickly spliced with the UHPC pipe pile through the socket hole; and the UHPC pipe section on the lowermost part sleeves the top of the cast-in-situ pile, the contact part of the UHPC pipe section on the lowermost part and the top of the cast-in-situ pile is glued, two spaced annular glued seams are formed, and the position between the two glued seams is filled with an annular water swelling water-stop belt. The bearing-platform-free UHPC pile and column integrated structure is particularly suitable for construction of structure foundations under marine corrosive environments, a bearing platform is omitted, thus the engineering quantity of pile foundation construction can be lowered, and meanwhile wave flow force of a single pile foundation is reduced; and by adopting the UHPC prefabricated pipe sections and the socketed pier column and carrying out fabrication construction, the construction speed can be increased, and structural durability can be improved.

Description

technical field [0001] The invention relates to the field of UHPC piles. More specifically, the present invention relates to a UHPC pile-column integrated structure free from caps. Background technique [0002] At present, the vast majority of large-scale engineering projects such as cross-sea bridges and offshore wind power adopt the structural form of pile foundation + cap + pier column, and the pile foundation includes bored piles, steel pipe piles and composite piles. Bored cast-in-situ piles need to be equipped with concrete mixing stations, large drilling rigs and steel casings at sea, which have disadvantages such as heavy weight, low construction efficiency, and weak tensile strength; although steel pipe piles improve construction efficiency, the problem of steel corrosion is prominent and the cost is high. Expensive; although the steel pipe composite pile combines the advantages of the former two, it is also unable to overcome the shortcomings of durability and eco...

AI Technical Summary

Problems solved by technology

Bored cast-in-situ piles need to be equipped with concrete mixing stations, large drilling rigs and steel casings at sea, which have disadvantages such as heavy weight, low construction efficiency, and weak tensile strength; although steel pipe piles improve construction efficiency, the problem of steel corrosion is prominent and the cost is high. High; although steel pipe composite piles combine the advantages of the former two, they also cannot overcome the shortcomings of durability and economy

The large-scale caps in the sea play an important role in transferring the load of the pier column and the superstructure to the pile foundation. Usually, it needs to be poured on-site through temporary enclosures such as steel casings, which is time-consuming and laborious. In addition, during the construction and operation periods, the caps The flow force is large, and the water-facing area is also large, and the wave flow force will often become the control load of the entire substructure design.

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