Method for extracting construction engineering pile foundation

Abstract

The invention discloses a method for extracting a construction engineering pile foundation and belongs to a civil engineering construction method. The method includes the steps: learning conditions of the pile foundation and formulating equipment for pile extracting; equipping a geological drilling rig, a high-pressure jet pump, an air compressor, a jack and lifting equipment; leveling terrace and sorting out pile heads, and transporting a complete set of facilities to a site; drilling, namely leading a high-pressure liquid injection tube to the bottom of a hole so as to form a semicolumn slurry-hole body at a position where the pile foundation corresponds to the drill hole; inserting a slurry-discharging tube into the hole body; inserting a slurry-pump slurry-discharging tube into the bottom of the slurry-discharging tube, and pumping slurry out from the slurry-discharging tube; fixing a counterforce device at the top of the pile foundation, jacking the counterforce device through the jack, lifting the pile foundation through the lifting equipment, after the whole pile foundation is extracted, pulling out the high-pressure liquid injection tube and the slurry-discharging tube prior to cleaning the same, detecting the extracted pile foundation, and finally refilling the pile foundation hole. The method is flexible to operate, and favorable for disintegrating binding force of the pile foundation and surrounding soil mass; resistance of the pile foundation when being extracted is enabled to be reduced, so that resources are saved, and an environment is protected.

Description

technical field [0001] The invention belongs to the technical field of civil engineering construction methods, in particular to a method for pulling out construction engineering pile foundations, which is used for removing pile bodies located underground in abandoned buildings. Background technique [0002] In order to enhance the bearing capacity of the foundation to the building, pile foundations are usually set deep into the foundation by piling or reinforced concrete pouring, especially in coastal economically developed areas, where pile foundations are more commonly used. With the rapid development of our country's economy, many buildings in the 1980s and 1990s had to be demolished because they did not meet the requirements of the rapidly developing society. In particular, due to the increasing scarcity of land resources and the increasing awareness of conservation and protection of land resources in the whole society, a large amount of construction land comes from the ...

AI Technical Summary

Problems solved by technology

And then as CN101736746A recommended "the construction method of vibrating sinking tube high-pressure grouting underpinning and pulling out piles" except there are aforementioned deficiencies, owing to needing to inject cement, fly ash and sand filling hole, thereby cause the secondary waste of resources; Pile removal by side-driving profiled steel decompression method, typical literature disclosure such as "drilled cast-in-situ pile reduction and removal method" introduced by invention patent application CN1482309A, this method is to drive profiled steel by vibrating hammer around the bored pile to be removed , because the steel is prone to deformation, the rigidity requirements for the steel are relatively strict. At the same time, the construction is difficult because the steel is required to be completely attached to the pile body, and it cannot be driven in once encountering an obstacle.