Steel sleeve soil taking and high-pressure water injection soil loosening pile pulling construction method

Abstract

The invention discloses a steel sleeve soil taking and high-pressure water injection soil loosening pile pulling construction method, which comprises the following steps of driving an outer sleeve and an inner sleeve into soil under high-frequency vibration to enable the soil to enter the inner sleeve; lifting out the soil and the inner sleeve together; unloading the soil under the high-frequency vibration; pulling out an old pile; backfilling the original position of the old pile with filler; pulling out the outer sleeve, or the steel sleeve soil taking and high-pressure water injection soil loosening pile pulling construction method comprises the following steps of sinking the outer sleeve and the inner sleeve with water injection pipes into the soil under the vibration of a high-frequency vibratory hammer; evenly arranging a plurality of high-pressure water injection holes in the bottom end of the inner wall of the outer sleeve; implementing high-pressure water injection while vibratory pile driving is performed to enable the old pile and mud around the pile to gradually enter the inner sleeve; pulling out the old pile; backfilling the hole of the old pile; pulling out the outer sleeve and the inner sleeve under the vibration. According to the steel sleeve soil taking and high-pressure water injection soil loosening pile pulling construction method disclosed by the invention, less soil or no soil is extruded in a construction process, so that the soil extrusion effect cannot generated; moreover, the frictional resistance of the pile body of the old pile is greatly reduced, so the old pile can be easily pulled out through a pile puller; the problem that the old pile cannot be pulled out due to the fact that the frictional resistance of the pile body is too big or the old pile is broken due to the fact that a pile pulling force is too big is avoided.

Description

technical field [0001] The invention relates to the field of engineering construction, in particular to a construction method for steel casing vibration soil extraction or high-pressure water injection to loosen soil and pull out piles. Background technique [0002] The old city renovation project will inevitably encounter the problem of the influence of the old building pile foundation on the new building pile foundation construction. In order to avoid the adverse impact of the old pile foundation on the new pile foundation construction on the site, it is generally necessary to Pull out the old piles at the new pile foundation position for subsequent construction. The existing pile extraction technology generally adopts the method of smashing and smashing, using a heavy hammer to smash the pile foundation, and then dig out the waste residue, which is time-consuming and labor-intensive, and damages the environment. Existing pile extractors have limited ability to extract pi...

AI Technical Summary

Problems solved by technology

[0003] One of the technical problems to be solved by the present invention is to provide a construction method for pulling out piles by vibrating soil with steel casing, which has high pile pulling efficiency, shortens the construction period, avoids the problem that old piles cannot be pulled out or broken piles, and has high economic benefits

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