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Construction method for controlling inclination and levelness of embedded section of tower crane

A technology of tower cranes and construction methods, applied in the direction of cranes, etc., to achieve the effects of enhancing stability, preventing stability degradation, and saving hoisting equipment occupation time

Active Publication Date: 2019-01-11
WENZHOU CONSTR GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem that the existing pre-embedded joint construction technology of tower crane cannot reliably control the levelness of the embedded joint within the range required by the specification, the present invention provides a construction method for controlling the inclination and levelness of the embedded joint of the tower crane , optimize the construction process, and greatly shorten the pre-embedded construction time while ensuring that the level of the embedded joints is controlled within the range required by the specification

Method used

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  • Construction method for controlling inclination and levelness of embedded section of tower crane
  • Construction method for controlling inclination and levelness of embedded section of tower crane
  • Construction method for controlling inclination and levelness of embedded section of tower crane

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Embodiment 1

[0022] Example 1: A construction method for controlling the inclination and levelness of embedded sections of a tower crane

[0023] A certain project needs to install a QTZ70 tower crane. The tower crane adopts a fixed underframe structure with embedded joints. Its structure is as follows: figure 1 As shown, adopting the tower crane pre-embedded section inclination of the present invention and the levelness control construction method, specifically comprise the following steps:

[0024] 1) The design thickness of the foundation concrete of 4 tower cranes with adjustable bottom support is 1300mm, and the "Instruction Manual for Tower Cranes" stipulates that the embedded joint depth is 900 mm. Therefore, the theoretical support height of the adjustable bottom support is calculated:

[0025] Theoretical support height = foundation concrete design thickness - embedded joint depth = 1300-900 = 400 mm,

[0026] The height of the finished four adjustable bottom supports should be a...

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Abstract

The invention discloses a construction method for controlling the inclination and levelness of an embedded section of a tower crane, and belongs to the technical field of construction engineering. Theconstruction method comprises the steps of manufacturing of an adjustable bottom support, installation of the embedded section, adjustment of the levelness of the embedded section, structural reinforcement, binding of steel bars, erection of a formwork, concrete pouring and compacting, and concrete curing. According to the construction method, the adjustable bottom support which is specially designed and manufactured is adopted, an operation method and process are reasonably designed based on the principle that one plane is defined by three points, continuous and accurate adjustment of boltsis achieved through the adjustable bottom support so as to control the levelness of the embedded section of the tower crane within a required design range, so that various safety problems affecting usage of the tower crane caused when the levelness of the embedded section of the tower crane exceeds the standard are solved, the advantages of an embedded-section fixing bottom frame of the tower crane are brought into full play, and the construction method has an important effect on safe usage of the tower crane; and meanwhile, the construction efficiency can be greatly improved, and the construction time is shortened by half or over.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a construction method for controlling the inclination and levelness of embedded joints of a tower crane. Background technique [0002] Due to its reasonable design, safety and reliability, the pre-buried joint fixed underframe structure of tower cranes is widely used in construction sites. However, due to the high requirements of the structure on the control of the levelness of the embedded joints, the levelness of the plane formed by the tops of the four fixed legs of the embedded joints is required to be controlled within 1 / 1000; the currently commonly used embedded construction technology cannot meet the requirements , The survey found that more than two-thirds of the tower cranes currently in use adopt the embedded section fixed underframe structure, and the levelness of the embedded section exceeds the standard. In order to prevent the verticali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C23/62
CPCB66C23/62
Inventor 胡平足郑园园应明铭陈晓龙陈亮叶田
Owner WENZHOU CONSTR GROUP
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