Synchronous-grouting pre-stressed pipe pile and construction method thereof

Abstract

The invention relates to a synchronous-grouting pre-stressed pipe pile. The synchronous-grouting pre-stressed pipe pile comprises a special pile shoe device, a prefabricated pipe pile, a grouting pipedevice and a grouting layer; the special pile shoe device comprises a main grouting pipe, branch pipe joints, branch pipes and grout discharging holes; the upper end of the main grouting pipe is connected with the grouting pipe device; the lower end of the main grouting pipe is connected with the branch pipes via the branch pipe joints; each branch pipe is connected with the corresponding grout discharging hole; the grout discharging holes are uniformly distributed at an equal interval in the outer side of a pipe pile juncture at the edge of a pile shoe; the grouting pipe device is arranged inside a cavity of the prefabricated pipe pile; and the grouting pipe device comprises a four-claw hook, an upper end interface, a grouting pipeline and a lower end interface. The synchronous-groutingpre-stressed pipe pile provided by the invention has the beneficial effects that the synchronous-grouting pre-stressed pipe pile is a novel pile foundation which is formed by adopting a pile jacking-in method and is additionally provided with a special pile shoe based on an original pre-stressed pipe pile; by synchronous grouting, the sidewall of the pipe pile can be lubricated by grouting liquid,so the difficulty of pile pressing is reduced, and the requirements on the bearing capacity of a place and the requirements on pile pressing equipment are reduced.

Description

technical field [0001] The invention belongs to the field of foundation treatment, in particular to a prestressed pipe pile structure. Background technique [0002] Prestressed pipe piles have the advantages of fast construction speed, low cost, and high bearing capacity, but they have small pile diameters and low horizontal load bearing capacity. In soft soil, due to the large distance between the strength of the pile body and the strength of the soil, it cannot be fully utilized. Pile bearing capacity and other issues. Static pressure pile driving has the advantages of low construction noise, light vibration, low pollution, fast construction speed, high work efficiency, short construction period, small construction stress, and reliable pile quality. The higher the pile sinking pressure, the more weight is required, so the requirements for the bearing capacity of the foundation of the site are higher, and it is difficult to sink piles in hard soil layers. Contents of the...

AI Technical Summary

Problems solved by technology

[0002] Prestressed pipe piles have the advantages of fast construction speed, low cost, and high bearing capacity, but they have small pile diameters and low horizontal load bearing capacity. In soft soil, due to the large distance between the strength of the pile body and the strength of the soil, it cannot be fully utilized. Pile bearing capacity and other issues

Static pressure pile driving has the advantages of low construction noise, light vibration, low pollution, fast construction speed, high work efficiency, short construction period, small construction stress, and reliable pile quality. If the pile sinking pressure is higher, more weight is required, which requires higher bearing capacity of the foundation of the site, and it is difficult to sink piles in hard soil layers.

Images