Construction method for concrete vibroflotation composite pile

Abstract

The invention discloses a construction method for a concrete vibroflotation composite pile and relates to a pile foundation construction method. The problems that vibration cannot be fully conducted on existing cast-in-place concrete piles, and consequently bearing capacity of pile ends and pile sides is poor are solved. A hole is drilled, specifically, a long spiral drilling machine is adopted for rotary excavating and drilling, and rotary excavating hole diameter range is 300-1000 mm. Concrete is poured in, high-slump concrete is poured in from the bottom of the spiral drilling machine, thewall is protected, and the hole is formed. A drill bit is lifted, and specifically, the effect that the lifting speed of the drill bit of the spiral drilling machine is lower than concrete pouring speed is ensured till the whole drill bit of the spiral drilling machine is lifted out of the hole and concrete pouring is completed. Vibration and tamping are conducted, specifically, a high-strength precast concrete member is inserted into the concrete pouring hole in the step 3, vibroflotation type tamping and vibration are conducted on pile body concrete through the high-strength precast concretemember, the distance between the outer edge of the high-strength precast concrete member and the inner wall of the rotary excavated hole is 10-100 mm, and finally the concrete vibroflotation composite pile is formed. The construction method is used for pile foundation construction.

Description

technical field [0001] The invention relates to a construction method of a concrete vibrating composite pile. Background technique [0002] With the rapid development of my country's construction industry, the requirements for the bearing capacity of building foundations are getting higher and higher, the foundation forms are also various, and concrete pouring piles are widely used. [0003] At present, in the construction of concrete pouring piles, due to the influence of the construction process, the concrete of the entire pile body cannot be fully vibrated, so the integrity and quality controllability of the piles are poor, resulting in a large bearing capacity of the pile ends and pile sides of the foundation piles. Loss. Contents of the invention [0004] In order to solve the problem that existing concrete pouring piles cannot be sufficiently vibrated, resulting in poor bearing capacity of pile ends and pile sides, the invention further provides a construction metho...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that existing concrete pouring piles cannot be sufficiently vibrated, resulting in poor bearing capacity of pile ends and pile sides, the invention further provides a construction method for concrete vibro-concrete composite piles