A method for pulling out a steel pipe downcomer well

Abstract

The present invention relates to tube well construction. The invention relates to a method for pulling out a steel pipe downwater pipe well, comprising: when setting up a downwater steel pipe well, uniformly arrange and weld four hanging ribs on the outer wall of the tube well, weld the hanging ribs with the downwater well pipe intermittently, and weld a lifting ring at intervals on the hanging ribs; When sinking the steel pipe well, the outer wall of the filter section is wrapped with nylon gauze, and the outer wall and hanging ribs of the remaining steel pipe sections are wrapped with plastic film to isolate the contact between the well pipe and the soil; Set four jacks symmetrically on the base, set the landing gear at the lifting part of the jack, and set a sling at the corresponding part of the landing gear and the ring on the top of the tube well, and connect the sling to the ring on the top of the tube well; then start the jack, and gradually pull out the tube well; the stroke of the jack is in place Finally, reset the jack, reconnect the suspension rope to the next part of the suspension ring, and pull out the tube well in a reciprocating manner. The invention reduces potential safety hazards and environmental pollution.

Description

technical field [0001] The invention relates to tube well construction, in particular to steel pipe downwater tube well construction. Background technique [0002] At present, the commonly used precipitation steel pipe wells are usually abandoned in the underground soil after the dewatering construction is completed. Because the steel pipe wells are buried in the soil for a long time, the outer wall is corroded and the soil is occluded, which increases the friction between the outer wall of the steel pipe well and the soil. , cannot be pulled out, and the depth of some decompression and dewatering wells may even exceed 60m. These steel pipes left underground and unable to be taken out will gradually rust over time, causing pollution to groundwater and soil resources. Contents of the invention [0003] The invention aims to overcome the defects of the prior art, and provides a method for pulling out a steel pipe downcomer well. The invention is simple and easy to operate, ...

AI Technical Summary

Problems solved by technology

[0002] At present, the commonly used precipitation steel pipe wells are usually abandoned in the underground soil after the dewatering construction is completed. Because the steel pipe wells are buried in the soil for a long time, the outer wall is corroded and the soil is occluded, which increases the friction between the outer wall of the steel pipe well and the soil. , cannot be pulled out, and the depth of some decompression and dewatering wells may even exceed 60m. These steel pipes left underground and cannot be taken out will gradually corrode over time, causing pollution to underground water and soil resources.

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