The construction system and method of the lower beam of the main tower

Abstract

The invention provides a construction system and a construction method for a lower cross beam of a main tower. The construction method comprises the following main construction steps: (1) manufacturing a steel pipe column, a shaped bracket and an embedded part; (2) installing embedded parts; (3) pouring a bearing platform and a tower base; (4) installing steel pipe columns; (5) constructing upperstructures such as section steel and military bailey beams; (6) mounting a corbel bracket; (7) hoisting and fixing the shaped tower-attached hoops; (8) welding a square shaped steel die; (9) pouring lower cross beam concrete; (10) dismounting a formwork system. The main tower lower cross beam inclined strut support system and the construction method are reasonable in support point design, high insupport stress balance, firm in support fixation, convenient in corbel bracket dismounting, small in influence of wind power and mechanical acting force, large in bearing capacity, free of erecting asupport system in water, small in influence of water flow and good in economic and technical benefits.

Description

technical field [0001] The invention relates to a construction system and a construction method for a lower beam of a main tower, in particular to a construction method for a support system for a lower beam with an ultra-low and super-large cross-section in a large flow rate water area. Background technique [0002] The bridge bracket is the main supporting structure of the integral cast-in-place continuous box girder construction. It has many advantages such as convenient transportation, simple installation and disassembly, and good integrity. It is widely used in the construction of long-span bridges. However, in its use, the problem of bracket collapse Word of mouth is outstanding. In some areas, there have been many major liability accidents in which the support collapsed during the construction process and the bridge collapsed, which caused immeasurable losses to the lives of the people and national property, and also had a bad social impact. [0003] A series of bridg...

AI Technical Summary

Problems solved by technology

[0002] The bridge bracket is the main supporting structure of the integral cast-in-place continuous box girder construction. It has many advantages such as convenient transportation, simple installation and disassembly, and good integrity. It is widely used in the construction of long-span bridges. However, in its use, the problem of bracket collapse Prominent

In some areas, there have been many major liability accidents in which the support collapsed during the construction process and the bridge collapsed, which caused immeasurable losses to people's lives and national property, and also had a bad social impact.

[0003] Throughout a series of bridge support collapse accidents, it is mainly caused by the following reasons: (1) The supports are supported underwater and are greatly affected by water currents and ships, and the support foundation is not firm

(2) The cast-in-place continuous box girder has a large size and a large load, and the support itself is low in strength, and the insufficient bearing capacity causes the support to collapse

(3) The design of the support point of the bracket is unreasonable, and the unbalanced force of the bracket causes the rollover

(4) The welding of the corbel bracket is not firm and the welding quality is poor

Images