Self-experiencing expansion pile shoe and immersed tube poured pile re-piling method

Abstract

The invention is a self-experiencing expansion pile shoe and sinking pipe filling pile re-piling method. The pile shoe includes a modulu tube; and a cone pile tip composed of a plurality of cambered surface leaves, each straight edge on the upper end of the leaves can rotatably connect with the hinge welded on the bottom of the modulu tube, without the process of embeding the pile tip; and in the process of immersing the tube, the resistance is released, the soil extrusion is reduced, and the construction efficiency and quality is improved. According to the tests, compared with the embedded pile tip type, the filling coefficient of the present inventive device can increase 0.1 ~ 0.2, and can increase the single pile bearing capacity. A deep partial re-piling concrete filling pile method of the invention and a large diameter single sinking pipe concrete filling pile, have a great application significance, in addition, the invention can not only applies in the construction of high-rise building, but also can be applied to the treatment of the airport, dam, railway and expressway basis.

Description

Technical field: [0001] The invention belongs to the technical field of construction, and particularly relates to the improvement of a pile shoe and a process method for an immersed pipe concrete cast-in-place pile. Background technique: [0002] As land resources become increasingly tense and the number of building layers continues to increase, the pressure on immersed tubes increases accordingly. However, in the current pre-embedded construction of prefabricated pile tips for building pile foundations, mechanical benches and vibration pressure can easily break the pile tips, causing the immersed tube, also known as the mold tube, to sink into the plug tube; continuous high-speed construction, the foundation is highly compressed, making the The pile floats and drifts, the pile body and the pile tip are separated, the pile body shrinks and deforms, and the soil is squeezed seriously, destroying the plastic shape of the foundation, affecting the condensation of the surroundin...

AI Technical Summary

Problems solved by technology

However, in the prefabricated pile tip pre-embedded construction of the current building pile foundation, the mechanical stand and vibration pressure are easy to break the pile tip, causing the immersed tube, also known as the molded tube, to sink the pile tip into the plug tube; continuous high-speed construction, the foundation is highly compressed, and the resulting The pile floats and drifts, the pile body and the pile tip are separated, the pile body shrinks and deforms, and the soil is seriously squeezed, which damages the plastic shape of the foundation, affects the condensation of the surrounding pile-forming concrete, disperses the shape of the pile body, and reduces the bearing capacity of the single pile, especially when the pile is pulled out. The filling coefficient does not meet the design specifications, which seriously affects the quality of the foundation bearing project

Images