High-strength prestressed concrete pipe pile

Abstract

The invention provides a high-strength prestressed concrete pipe pile. The high-strength prestressed concrete pipe pile comprises a pipe pile body, and a fixing hoop is fixedly installed at the lower end of the outer surface of the pipe pile body in a surrounding mode; a plurality of soil inlet grooves are formed between the outer surface of the top side of the fixing hoop and the pipe pile body in an equally adjacent mode, and combined pipes are in communication with the positions, in the vertical direction, of the lower portions of the soil inlet grooves in a penetrating mode; an upper pipe, a middle pipe and a lower pipe are respectively arranged at the upper end, the middle end and the lower end of each combined pipe in sequence; upper sliding plates are slidably installed at the bottom ends in the upper pipes; and inner cavities of the middle pipes are filled with inert gas, and lower sliding plates are installed at the bottom ends of the interiors of the middle pipes in a sliding mode. According to the high-strength prestressed concrete pipe pile, when pile sinking equipment is used for driving the pipe pile into soil, soil around the lower end of the pile body can be fully utilized to supplement the stability of the pile body, the anti-pulling capacity of the pile body is improved, and the safety accident that the pipe pile is pulled up with the root can be avoided when disasters such as typhoons and earthquakes occur.

Description

technical field [0001] The invention relates to the field of geotechnical engineering construction pipe piles, in particular to a high-strength prestressed concrete pipe pile. Background technique [0002] With the rapid development of the economy and the continuous improvement and improvement of people's material life, the construction industry has developed rapidly, but with it, the construction land is becoming more and more tense or in short supply. The weight is large, and the pipe piles have high requirements for deformation resistance, pull-out resistance, and safety. Therefore, the quality of pile foundation construction is high, and the prestress of concrete pipe piles must be strong; prestressed high-strength concrete pipe piles (PHC piles) are characterized by their The piles are widely used in industrial and civil buildings due to their advantages such as good quality, high strength, resistance to driving, strong penetration ability, strong adaptability to engine...

AI Technical Summary

Problems solved by technology

[0003] Among them, the patent number is CN201822268918.0, a prestressed high-strength concrete pipe pile with anti-corrosion coating, which solves the technical problems of poor corrosion resistance and low durability of pipe piles in the prior art; it has a pile body And the end plate, the pile body is a hollow cylindrical structure, the pile body is paved with pile concrete, and the pile body is also equipped with a reinforcement cage, the reinforcement cage includes prestressed steel rods and spiral stirrups, and the prestressed steel rods are cylindrical rod-shaped structures , the distance between the spiral stirrups in the middle of the pile body is 80mm, and the two ends of the pile body are equipped with a stirrup densification area. The distance between the spiral stirrups in the densification area is 45 mm. Covered on the concrete outer layer of the pile body, the anti-corrosion coating is a cement-based anti-corrosion coating, and several main reinforcement anchor holes and tension screw holes are arranged on the end plate along its circumferential direction; the patent structure is simple, the pile body has high strength, and the pile The cement-based anti-corrosion coating applied on the outside of the pile body can effectively block the corrosion of concrete by chloride ions, sulfate radicals, water, etc. When the pile sinking equipment drives the pipe pile into the soil, it fails to make full use of the soil around the lower end of the pile body to supplement the stability of the pile body; it will occur due to the low pull-out capacity in the event of disasters such as typhoons and earthquakes. A safety accident in which pipe piles were uprooted

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