Construction technology for precisely positioning and quickly installing steel pipe column in covered top-down excavation method

Abstract

The invention discloses a construction technology for precisely positioning and quickly installing a steel pipe column in a covered top-down excavation method. The construction technology comprises the following steps of after a reinforcement cage of a pile foundation is lifted, casting a concrete pier and installing channel steel along the cross direction of a steel casing, measuring the elevation and coordinates of the steel casing, determining the relative elevation and coordinates of the steel pipe column, and welding two support steel plates on the steel casing; lifting the steel pipe column into a lifting hole, and completing the primary installation of the steel pipe column by using the steel casing as a reference object; building a platform by channel steel and steel sheets on a hole opening, setting out the coordinates in the steel pipe column, and marking; arranging a laser plumb aligner, trimming the steel pipe column by a jack, and coinciding the center of target and the light sport; welding the steel pipe column and the steel casing by steel sheets to form a whole. The construction technology has the advantages that by arranging the two support steel plates in the steel casing, the steel pipe column can be suspended in air during lowering; the center coordinates and verticality of the steel pipe column are adjusted by the laser plumb aligner and the jack, and the concrete casting is not needed before the positioning of the steel pipe column is completed.

Description

technical field [0001] The invention relates to a construction method for precise positioning and rapid installation of a steel pipe column in the construction of an underground engineering cover excavation and reverse method. Background technique [0002] The concrete of the pile foundation needs to be poured three times in the manual positioning and installation of traditional steel pipe columns; first, the concrete is poured to the position of the positioner elevation, and the operator goes down to the bottom of the hole to chisel the concrete to the bottom level of the positioner, and stake out the position of the positioner on the concrete surface And mark, install the locator manually, and then pour the concrete for anchoring the locator; then hoist the steel pipe column, put the steel pipe column on the locator for welding and anchoring, and finally pour the concrete for anchoring the steel pipe column. [0003] In the manual positioning and installation of traditiona...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a construction technology for precise positioning and rapid installation of steel pipe columns in the cover-and-excavation method, so as to solve the long construction period of pile foundation concrete in the manual positioning and installation of traditional steel pipe columns, and the need to invest a large amount of steel casings. And the problem of high risk to the safety of workers

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