Long screw extruding bottom ramming pile machine and pile foundation filling method

Abstract

The invention relates to a long spiral extrusion bottom ramming pile machine and a pile foundation pouring pile forming method. The long spiral extrusion bottom ramming pile machine is composed of a power head, a drilling rig, a ramming expanding hammer, a gantry, an inclined strut, an auxiliary winch, a main winch, a fast humping winch, a walking assembly, a rack platform assembly and a balance weight. The pile foundation pouring pile forming method comprises the steps that the long spiral extrusion bottom ramming pile machine is used for forming a pile hole, concrete is then poured, and then a reinforcement cage is put in the pipe hole to form a pile. According to the long spiral extrusion bottom ramming pile machine and the pile foundation pouring pile forming method, the pile forming speed is high, the diameter of the formed pile is large, the depth of the formed pile is large, the bearing capacity of the bottom end of the rammed and expanded pile is high, and cost is saved. The defect that a large amount of loose soil is discharged in a drilled pipe is overcome, and the defects that a composite carrier rammed and expanded pile formed hole is slow in construction, shallow, small in diameter and the like are overcome. According to the long spiral extrusion bottom ramming pile machine and the pile foundation pouring pile forming method, the hole is formed in a high torque extrusion soil discharging mode, the composite carrier is formed through bottom ramming with a high-impact energy heavy hammer, and the formed pile has the advantages of being large in side friction, high in end bearing, low in cost, high in construction efficiency and the like.

Description

technical field [0001] The invention belongs to the field of pile foundation engineering, and in particular relates to a pile foundation pouring pile method with high bearing capacity integrating side friction resistance and end bearing. Background technique [0002] In the field of modern pile foundation engineering, composite carrier rammed and expanded piles and long spiral cast-in-place concrete piles are widely used. The characteristics of the composite carrier rammed pile are: no soil discharge, and the end bearing body is made by ramming the filler and dry concrete. It is a one-end bearing pile. Compared with other types of piles, the bearing capacity of the pile with the same diameter per unit length is higher. The disadvantages are: the pile body is short, generally within 10m; the pile formation efficiency is low, generally 5-8 piles per shift, and due to the soil squeezing effect, piles from two shifts need to be staggered to form piles, or jump driving Pile form...

AI Technical Summary

Problems solved by technology

The disadvantages are: the pile body is short, generally within 10m; the pile formation efficiency is low, generally 5-8 piles per shift, and due to the soil squeezing effect, piles from two shifts need to be staggered to form piles, or jump driving Pile formation, equipment turnover back and forth, affecting work efficiency; due to the existence of soil squeezing effect, the completed piles will be squeezed during the process of pouring piles, affecting the bearing strength; the construction of complex strata (such as hard interlayers, etc.) has certain difficulty

Existing problems are: increasing the bearing capacity of a single pile can only be achieved by increasing the pile diameter (up to 1m) or lengthening the pile body (up to 32m), the construction cost is high, and the transportation of a large amount of virtual soil is labor-intensive and labor-intensive. transport capacity, but also cause environmental pollution

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