Pile-formation deposition pipe of prefabricated steel concrete club-footed pile

Abstract

The invention discloses a file forming equipment of a steel concrete expanded bore pile precast by an immersed tube, in particular to a pile forming immersed tube of a fabricated steel concrete expanded bore pile. The pile forming immersed tube of the invention is composed of a hollow tubular tube body and at least two guiding wings arranged along the circumference; the position corresponds to theguiding wings, and inside the bottom of the tube body is provided with a locating groove which is matched with the locating iron feet of excavation equipment; the upper part of the vertical section view of the locating groove is a wedge-shaped slop while the lower part is matched with the outer end part of the locating iron feet, and a seal ring is sheathed at the outer wall of the bottom of thetube body. The pile forming immersed tube of the invention guarantees the proportional relation of the tube body and the inner diameter of the bottom, and fully utilizes the effective space in the guiding wings to ensure enough depth of the locating groove, and to ensure that the locating iron feet of the excavation equipment can easily enter the groove with correct, firm and reliable location, thusincreasing the concentricity of a pile body and a base, and ensuring that the bearing capacity of a single pile can meet the design standard; in addition, the pile forming immersed tube can be utiliz ed in the inland as well as coastal areas with easy implementation.

Description

[0001] This application is a divisional application of the application number 200510047946.4, the application date is December 8, 2005, and the invention name is the pile-forming sinking pipe of the prefabricated steel concrete expanded bottom pile. technical field [0002] The invention relates to pile-forming equipment for prefabricated steel concrete expanded-bottom piles with sinking tubes, in particular to a pile-forming sinking tube for prefabricated steel-concrete expanded-bottom piles, and is a matching sinking tube for various prefabricated steel-concrete expanded-bottom piles. Background technique [0003] At present, in the pile foundation engineering of soft soil foundation, three kinds of cast-in-situ piles, prefabricated piles and large-diameter bored piles are generally used. Among them, the large-diameter bored pile has the highest bearing capacity, but its cost is the most expensive, the work efficiency is low, and the pollution is serious during construction...

AI Technical Summary

Problems solved by technology

The immersed tube is positioned with the excavating equipment with two "V"-shaped spiral grooves in cross-section. Only when the "V"-shaped spiral grooves have sufficient depth can the positioning be firm and reliable. The inner diameter of the bottom of the large immersed tube, and the inner diameter of the upper part should be kept larger than that of the lower part, and should be increased accordingly. Obviously, this is not advisable

If the upper and lower inner diameters remain unchanged, it will affect the smooth passage of the pile body in the immersed tube

And the current immersed tube is only suitable for use in the interior, and cannot be used in coastal areas, because when the metal pile head is taken out, a conical cavity is formed, there is a pressure difference between the outside of the tube and the inside of the tube, and the silt on the hard soil layer It is easy to enter into the conical cavity, so that the bottom expansion work cannot be carried out, and the use of immersed tubes in coastal areas is limited

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