Construction method of ultrahigh bearing capacity stiff composite pile

Abstract

The invention discloses a construction method of an ultrahigh bearing capacity stiff composite pile. According to the method, a cement soil peripheral pile is firstly constructed, and then, an inner core pile is constructed and driven in the peripheral pile. The construction method is characterized in that when the peripheral pile is constructed, a cement stirring device with blades in holoaxial arrangement is adopted for the cement stirring, and the simultaneous stirring is carried out in the whole pile length range; the cement stirring device with blades in holoaxial arrangement comprises a stirring shaft, the stirring shaft is connected with a power head, and a layer of stirring blades is arranged every 20 to 50cm in positions below the power head of the stirring shaft; a plurality of spray pipes are arranged in an inner cavity of the stirring shaft and are used for spraying water, dry powder, sand or curing agents, and spray openings of the plurality of spray pipes are positioned at the bottom of the stirring shaft; during the construction, the materials are sprayed through the spray pipes and are stirred for forming the pile. The construction method has the advantages that the construction efficiency is high, the intensity of the pile formed through construction is high, the bearing force is great, the bearing pressure of a pile body is more than 8000KN, the horizontal bearing force is more than 300KN, and the pulling resistant bearing force is more than 2000KN.

Description

technical field [0001] The invention relates to a construction method of a rigid composite pile. Background technique [0002] During the construction of the existing rigid composite piles, the mixing blades for the mixing construction of the peripheral piles are only distributed on the lower part of the mixing shaft. Due to the high pressure of the bottom soil, the amount of curing agent sprayed out is small, the work efficiency is low, and there are problems in mixing uniformity and strength. defect. Contents of the invention [0003] The object of the present invention is to provide a construction method for a super-high bearing-capacity rigid composite pile with high construction efficiency, high pile strength and large bearing capacity. [0004] Technical solution of the present invention is: [0005] A construction method for ultra-high bearing capacity rigid composite piles, first constructing cement-soil peripheral piles, and then constructing inner core piles in...

AI Technical Summary

Problems solved by technology

[0002] During the construction of the existing rigid composite piles, the mixing blades for the mixing construction of the peripheral piles are only distributed on the lower part of the mixing shaft. Due to the high pressure of the bottom soil, the amount of curing agent sprayed out is small, the work efficiency is low, and there are problems in mixing uniformity and strength. defect

Images