Steel pipe pile sinking device

Abstract

The invention provides a steel pipe pile sinking device. The steel pipe pile sinking device comprises a pile cap arranged at the top end of a steel pipe pile; the bottom end of the supporting cylinder is arranged on the pile cap; the pile hammer is arranged on the outer side of the supporting cylinder in a sleeving manner; the lifting mechanism is connected with the pile hammer and used for driving the pile hammer to move along the supporting cylinder; and the slewing mechanism is arranged on the pile hammer and the pile cap and used for enabling the pile hammer to impact the pile cap vertically and downwards or enabling the pile hammer to rotate relative to the pile cap and impact the pile cap. According to the method, the problem that the pile cannot be sunk to the designed depth due to the fact that a hammer is rejected in the pile sinking process due to soil plugs, hard strata and the like can be solved, the damage to soil layers around the pile and at the pile end is small, the bearing capacity loss of the pile is small, the equipment hoisting frequency is reduced, the application field of the steel pipe pile is greatly expanded, energy consumption is reduced, and the construction efficiency and safety are obviously improved.

Description

technical field [0001] The invention belongs to the technical field of pile foundation construction, and in particular relates to a steel pipe pile sinking device. Background technique [0002] When the open steel pipe pile is driven into the soil layer, a large amount of soil pours into the pipe, forming a soil plug. The correct judgment of the impact of soil plugs on the driveability of piles is related to pile design, construction equipment selection, and construction efficiency. A large number of tests and field measurements at home and abroad show that the height and occlusion degree of soil plugs in open steel pipe piles vary with many factors such as soil properties, geometric characteristics of piles, pile forming methods, depth of piles into the soil, and depth into the bearing layer. Changes, which are most closely related to the properties of the soil layer and the diameter of the pile. In soft soil areas, the soil plug height of large-diameter steel pipe piles ...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a pile sinking device for steel pipe piles, which can solve the problem that the hammer cannot sink the pile into the design depth due to soil plugs, hard strata, etc. Less damage to the soil layer, less loss of pile bearing capacity, and reduced equipment hoisting times, greatly expanding the applicable site for steel pipe piles, reducing energy consumption, and significantly improving construction efficiency and safety

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