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

Abstract

The present invention is a re-drilling method of self-expanding spud boots and immersed pipe pouring piles. The spud boots include a mold tube and a conical pile tip composed of multiple arc-shaped leaves. The straight edge of each leaf is connected to the mold tube by welding. The hinge at the bottom can be rotatably connected without the need for pre-embedded pile tips; during the sinking process, resistance is relieved, soil extrusion is reduced, and construction efficiency and project quality are improved. According to the test, the filling coefficient of this device can be increased by 0.1 to 0.2 compared with the pile tip pre-embedded type, and the bearing capacity of a single pile can be improved. The present invention's deep-layer partial re-concrete pouring method and large-diameter single-piercing concrete pouring pile have great significance for popularization. In addition, the present invention can also be applied to airports, dams, railways and expressways in addition to the application in high-rise building construction. Basic processing.

Description

Technical field: [0001] The invention belongs to the technical field of construction, and in particular relates to the improvement of the process method of pile shoes and immersed tube concrete pouring piles. Background technique: [0002] As land resources become increasingly tense and the number of floors of buildings increases, the pressure on immersed tubes also increases accordingly. 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 t...

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

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