Assembly construction process of prefabricated 40m T-beam in intertidal zone of open sea

A construction technique, tide technology, applied to bridges, bridge construction, erection/assembly of bridges, etc.

Inactive Publication Date: 2012-09-12
NO 3 ENG CO LTD OF CCCC THIRD HARBOR ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no approach bridge with a design length of more than 3 kilometers and a spacing of 40 meters. The upper structure adopts prefabricated T-beams. The maximum weight of a single T-beam reaches more than 180 tons. It is located between the high and low tide levels of the spring tide and rises with the tide. Typical intertidal construction precedents for submerged and exposed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The installation and construction process of the prefabricated 40m T-beam in the intertidal zone in the open sea includes the following process steps: the prefabricated 40m post-tensioned prestressed T-beam is transported to the construction site by water after the completion of the prefabricated 40m T-beam. The girder trolley transports the girder to the erection site, and finally erects it to the designated position by the bridge erecting machine. The specific installation sequence is: from the sea side to the shore side, span by span, and the erection sequence of each span T beam is side→middle→side→middle.

Embodiment 2

[0015] The installation and construction process of the prefabricated 40m T-beam in the intertidal zone of the open sea, the water transportation of the prefabricated 40m post-tensioned prestressed T-beam to the construction site after completion includes the following construction steps: select Ф60mm steel wire rope, and use two 100-ton T-beams at the same time Lift the bottom of the gantry sling, move the T beam to the edge of the prefabricated site, and place it on the steel beams at both ends of the prefabricated beam. Use gantry cranes to lift T beams to barges when necessary, and use 1200t flat barges for water transportation. Each ship is loaded with 3-4 pieces of T beams. Steel frames are made of channel steel and steel plates on the flat barges in advance, and 3-4 pieces are determined. The respective positions of the T beams are placed, and the upper part is connected with 3-4 pieces of T beams through the hanging point with straps. The T beams are wedged with wooden ...

Embodiment 3

[0017] In the installation process of the prefabricated 40m T-beam in the intertidal zone of the open sea, the erection of the bridge erecting machine adopts the construction process of feeding the beam at the tail, pulling the beam, and erecting the beam across a hole. After the first piece of beam is in place, install Temporary support, after the support is confirmed, the hook can be released. The second and subsequent beams are transported at a low position above the first beam and at a position 10cm higher than the top surface of the first beam. The end support section moves at a low position of 10cm on the top surface of the cover beam. After it is in place, the beam is slowly lowered into place, and no less than four connecting steel plates are welded to the adjacent erected beam surface before the hook can be released and the next beam can be erected. .

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PUM

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Abstract

The invention discloses an assembly construction process of a prefabricated 40m T-beam in an intertidal zone of an open sea. The intertidal zone is a critical construction region of a coastal construction, and is a construction which does not adapt to water or land construction process; and construction of the intertidal zone is a technical problem at home and abroad. The process comprises the following steps: a prestress T beam is shipped to the construction field after the 40m prestress T beam is prefabricated by a post-tensioning method; the T beam is hoisted to a beam transporting trolley through a cross-mound gantry crane on a switching platform, and transported to the erection field by the beam transporting trolley, and is spanned to a designated position through a bridge girder erection machine. The particular assembly sequence is that the beams are spanned from the sea side to the coach side, and the erection sequence of each T beam is side, center, side and center. According to the assembly construction process, the typical intertidal zone construction problems that prefabricated T beams are adopted in the upper structure of an approach bridge with a designed length of over 3km and bent spacing of 40m, the single T beam with maximum weight of over 180 tons is positioned between high and low tide levels of a spring tide and is submerged and exposed along with tiding can be solved successfully.

Description

technical field [0001] The invention relates to a prefabricated 40m T-beam installation and construction process in the intertidal zone of the open sea, and belongs to the technical field of construction. Background technique [0002] The typical intertidal zone includes the shoal area (inaccessible to boats), where the tide level appears for less than 3 hours at a water depth of 1.5m; the intertidal zone (where boats can catch the tide), where the tide level appears for no less than 3 hours at a water depth of 1.5m, and the water depth is 2.5m The area where the tidal level occurs for less than 8 hours; the area where the tide level occurs for no less than 8 hours in the shallow water area (going in and out with the tide), and the water depth is 2.5m; the intertidal zone is the key construction section of coastal projects, and it is A construction area where no construction technology is applicable; construction in the intertidal zone is a technical problem both at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00
Inventor 蒋建荣孙发荣张蓝舟朱友华
Owner NO 3 ENG CO LTD OF CCCC THIRD HARBOR ENG CO LTD
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