Construction equipment for tube-sinking cast-in-place expanded bore pile

Abstract

The invention discloses construction equipment for a tube-sinking cast-in-place expanded bore pile, and belongs to the technical field of underground engineering equipment. The construction equipmentis designed to solve the problem that base expansion of tube-sinking cast-in-place piles is difficult. The construction equipment is composed of a long spiral drill stem, a steering shaft, an inner blade, outer blades, a motor and a driving shaft. The upper end of the long spiral drilling stem is connected with a power source of a drilling machine, and the lower end of the long spiral drilling stem is connected with the steering shaft used for controlling a drill bit to steer. The steering shaft is used for controlling the drill bit to steer and is driven by a hydraulic jack. The inner blade is a circular blade and rotates synchronously along with the long spiral drill stem. The outer blades are two curved-edge quadrangular blades and are driven by the motor on the drill bit to rotate oppositely through a transmission shaft, so that edge beveling is achieved. The motor supplies rotating power to the outer blade through the transmission shaft. The transmission shaft supplies power to the outer blade through a transmission system which can steer through a gear. The construction equipment is simple in structure and high in engineering practicability.

Description

technical field [0001] The invention belongs to the technical field of underground engineering equipment, and in particular relates to construction equipment for sinking tube grouting piles, in particular to construction equipment for sinking tube grouting bottom expansion piles. Background technique [0002] With the rapid development of the construction industry, high-rise buildings in major cities have sprung up, and high-rise buildings have higher and higher requirements for the basic bearing capacity. In order to increase the bearing capacity of a single pile, bottom expansion piles are often used to reduce the distribution density and cost of foundation piles, and bottom expansion equipment has emerged as the times require. Even so, the bottom expansion equipment in the past can not meet the bottom expansion needs of immersed pipe grouting piles well, and most of the bottom expansion equipment has poor construction accuracy, low construction effect and control ability....

AI Technical Summary

Problems solved by technology

Even so, the bottom expansion equipment in the past can not meet the bottom expansion needs of immersed pipe grouting piles well, and most of the bottom expansion equipment has poor construction accuracy, low construction effect and control ability

In addition, the soil squeezing effect will occur when the immersed pile is immersed, and the piles poured in advance are easily affected, resulting in inclination, fracture or even dislocation

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