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

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 ...

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