Ultrahigh-bearing-capacity large-diameter pipe pile and fast pile sinking and secondary grouting method

Abstract

The invention discloses an ultrahigh-bearing-capacity large-diameter pipe pile and a fast pile sinking and secondary grouting method. The pipe pile is provided with a pair of symmetric hole ways in the vertical direction. A grouting device is fixed to the pile end of the pipe pile and comprises an upper end plate, a middle end plate and a lower end plate. The upper end plate is provided with a pair of vertically-through round through holes, and the round through holes are in one-to-one correspondence to the hole ways. The outer side of the middle end plate and the outer side of the upper end plate are fixedly connected in a seamless manner to form a hollow cavity. A pipeline is arranged in the middle end plate. One end of the pipeline is in seamless connection with one round through hole, and the other end of the pipeline is located over the lower end plate. An elastic sealing ring is arranged between the lower end plate and the middle end plate in a seamless manner and comprises multiple sealing pads attached in a seamless manner. Multiple holes distributed evenly and symmetrically are formed in the open face between the outer edge of the lower end plate and the outer edge of the middle end plate. The hole way connected with the pipeline is used for a secondary grouting hole of pile sinking, and the other hole way is used for a water jet hole and a primary grouting hole. According to the ultrahigh-bearing-capacity large-diameter pipe pile and the fast pile sinking and secondary grouting method, water jet and grouting integration of the large-diameter pipe pile can be achieved, and the pipe pile has the ultrahigh bearing capacity after grouting.

Description

technical field [0001] The invention relates to the field of infrastructure construction. More specifically, the invention relates to a large-diameter pipe pile with super high bearing capacity and a secondary grouting method for rapid pile sinking. Background technique [0002] Existing large-diameter pipe piles are difficult to sink, which limits their application. The force exerted by static presses and hammer machines for general construction cannot meet the requirements during the pile sinking process, and the pipe piles cannot reach the design elevation. The pile sinking method can be carried out more quickly by flushing the pile with water from the lower soil layer. Therefore, it is necessary to set up a water punching tunnel on the pipe pile. The setting of the tunnel and the connection between the single-section piles cannot just use ordinary welding. In this way, special joints are required to ensure the sealing during water flushing. [0003] After sinking the p...

AI Technical Summary

Problems solved by technology

[0002] Existing large-diameter pipe piles are difficult to sink, which limits their application. The force exerted by static presses and hammer machines for general construction cannot meet the requirements during the pile sinking process, and the pipe piles cannot reach the design elevation. The pile sinking method can be carried out more quickly by flushing the pile with water from the lower soil layer. Therefore, it is necessary to set up a water punching tunnel on the pipe pile. The setting of the tunnel and the connection between the single-section piles cannot just use ordinary welding. In this way, a special joint is required to ensure the tightness during the water flushing process

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