An extensible nested steel pipe pile and its installation method

Abstract

The invention discloses an extendible nested type steel pipe pile and a mounting method thereof. The steel pipe pile comprises a three-stage nested type steel pipe pile and an automatic popup fixed device. The three-stage nested type steel pipe pile comprises a first-stage steel pipe pile, a second-stage steel pipe pile and a third-stage steel pipe pile which are sequentially arranged from outsideto inside. Sliding guide grooves are formed in the inner walls of the first-stage steel pipe pile and the second-stage steel pipe pile, and limiting baffles protruding inwards are arranged at the bottom ends of the sliding guide grooves. Sliding guide rails protruding outwards are arranged on the outer walls of the second-stage steel pipe pile and the third-stage steel pipe pile, and limiting barrels protruding outwards are arranged at the top ends of the sliding guide rails. The automatic popup fixed device is arranged on the side walls of the sliding guide grooves of the first-stage steel pipe pile and the second-stage steel pipe pile and is used for clamping a pile body and resisting vertical pressure loads. According to the steel pipe pile, through the nested pile body mode, the length range of the steel pipe pile is obviously widened; by means of the nested mode, the pile size is obviously reduced, space is saved, and transporting is convenient; and the staged mounting manner isadopted, friction resistance during mounting is greatly reduced, and the complex step that a traditional steel pipe pile needs to be mounted after being welded on site is avoided.

Description

technical field [0001] The invention relates to a steel pipe pile and its installation method, in particular to an extensible steel pipe pile and its installation method. Background technique [0002] In recent years, the construction speed of my country's large-scale port projects has been accelerating, which not only meets the needs of the construction and use of giant ships, but also is a necessary demand for the development of foreign trade. The accelerated construction of large-scale port projects has put forward higher requirements for the foundation. Pile foundations are widely used in port engineering because of their high bearing capacity and good adaptability. At present, the commonly used pile foundations in port engineering include bored piles, prestressed reinforced concrete piles, steel pipe piles, PHC piles, prestressed concrete hollow square piles, etc. Among them, steel pipe piles have been widely used due to their high construction efficiency. application...

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Problems solved by technology

[0003] However, the traditional steel pipe piles are large in size, and will be subject to greater frictional resistance during installation, and transportation is more difficult

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