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

A construction technology and precise positioning technology, which is applied in the direction of basic structure engineering, construction, sheet pile walls, etc., can solve the problems of long construction period of foundation concrete, large steel casings, and high safety risks of operators, and achieve labor costs and Relevant measures cost reduction, risk reduction, and the effect of shortening the construction period

Pending Publication Date: 2018-08-07
CHINA RAILWAY NO 5 ENG GRP +1
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  • Abstract
  • Description
  • Claims
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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

Method used

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

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Example Embodiment

[0025] The construction process for precise positioning and quick installation of the steel pipe column in the cover and excavation inverse method in this embodiment includes the following steps:

[0026] The first step, after the pile foundation reinforcement cage is hoisted, pour the 1000*500*500mm concrete pier 4 in the cross direction of the steel casing 3 and install the 150*1250mm channel steel 5 to support, reinforce the steel casing 3 and fix one end of the channel steel 5. Embedded in the concrete pier 4, the other end is fully welded with the steel casing 3.

[0027] The second step is to measure the elevation and coordinates of the steel casing 3, determine the relative elevation and coordinates of the steel pipe column 1, and weld the first support steel plate 6a at 50cm below the top elevation of the steel pipe column 1 and at the position of the reinforcement ring 2 of the first section of the steel pipe column 1. and the second support steel plate 6b, arranged i...

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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...

Claims

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Application Information

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IPC IPC(8): E02D13/04E02D13/06E02D5/34
CPCE02D13/04E02D5/34E02D13/06E02D2300/0029
Inventor 黄勇杨凯锋
Owner CHINA RAILWAY NO 5 ENG GRP
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