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Steel cap installation method

An installation method and technology of steel caps, which are applied in water conservancy projects, artificial islands, underwater structures, etc., can solve problems such as difficulty in ensuring flatness of steel caps and difficulty in installation

Active Publication Date: 2018-01-23
THE SECOND ENG COMPANY OF CCCC FOURTH HARBOR ENG +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for installing a steel cap, which divides the whole steel cap into multiple sections, in view of the problems in the prior art that the overall installation of the steel cap is difficult and difficult to ensure the overall flatness of the steel cap. Bottom-up, left-right symmetrical way to install, using segmental hoisting, and then welding and fixing after assembly and positioning, so that the installation of the steel cap is completed and adjusted to meet the overall flatness requirements, providing a Gina waterstop for the final joint of the later butt joint The section with minimal flatness and construction error enables the Gina waterstop to be compressed as a whole without gaps, effectively ensuring the waterstop effect

Method used

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Embodiment

[0122] Such as Figure 7 As shown in the installation method of the steel cap, the steel cap is divided into several segments, and each segment is hoisted in a bottom-up and left-right symmetrical manner, and the segmented steel caps hoisted in place are positioned and welded.

[0123] When the steel cap is segmented, the center line of the steel cap is used as the center of symmetry, and the two symmetrical parts of the steel cap are divided into approximately the same segments, that is, the lengths and positions of the two symmetrical segments are approximately the same.

[0124] The bottom-up hoisting method is as follows: first hoist the bottom plate, then hoist the side walls and middle walls, and finally hoist the top plate.

[0125] The left-right symmetrical hoisting method is as follows: after the steel cap is segmented, after hoisting a certain section of the left or right steel cap, immediately correspondingly hoist the symmetrical right or left steel cap, the left ...

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Abstract

The invention relates to the technical field of immersed tube tunnels, in particular to a steel cap installation method. The installation method comprises the steps that a steel cap is divided into aplurality of sections, and the sections are hoisted from bottom to top in a left-right symmetrical mode; and the hoisted-in-place sectional steel caps are positioned and welded. According to the steelcap installation method, the steel cap is divided into the sections for being installed, so that the steel cap is conveniently transported and hoisted, and the construction difficulty is greatly reduced; the construction efficiency is improved, and the construction risk is also reduced; the sections are hoisted from bottom to top, the firstly-installed steel cap is conveniently positioned and adjusted, it is ensured that the steel cap has the high precision, so that the late-installed steel cap also has the good precision, and it is ensured that design requests are met after the steel cap iswholly hoisted; and meanwhile, the bottom plate section of the firstly-hoisted steel cap supports the sections of the late-hoisted steel cap, and the subsequently-installed sections are conveniently constructed.

Description

technical field [0001] The invention relates to the technical field of immersed tube tunnels, in particular to a method for installing a steel cap. Background technique [0002] The Hong Kong-Zhuhai-Macao Bridge Island Tunnel Project Submarine Tunnel Immersed Tube is composed of 33 pipe joints, which adopt a reinforced concrete structure. The pipe joints are prefabricated in the prefabrication plant, floated, installed and docked sequentially, and the tunnel is connected after the final joint construction. [0003] The final joint adopts a steel shell concrete structure, and a permanent Gina waterstop is set along the periphery. After being connected with the adjacent pipe joints, the Gina waterstop is fully compressed to achieve water stop. [0004] In order to ensure the water-stop effect of the Gina water-stop, a steel cap is set at the end of the adjacent pipe joint spliced ​​with the final joint. The steel cap needs to provide an end face with minimal flatness and cons...

Claims

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Application Information

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IPC IPC(8): E02D29/16E02D29/045
Inventor 林鸣陈伟彬张文森陈聪邹正周黄文慧朱成
Owner THE SECOND ENG COMPANY OF CCCC FOURTH HARBOR ENG
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