Integral welding closure method for large orthotropically combined steel truss bridge

An orthotropic bridge, steel truss bridge technology, applied in welding equipment, auxiliary welding equipment, welding/cutting auxiliary equipment, etc., to ensure the integrity and improve the speed of closing

Active Publication Date: 2011-06-15
SHANGHAI FOUND ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the technical problems in the construction of the closing section of large-scale truss bridges, and provides a method for integral welding and closing of large-scale orthotropic combined steel truss bridges

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  • Integral welding closure method for large orthotropically combined steel truss bridge
  • Integral welding closure method for large orthotropically combined steel truss bridge

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Embodiment Construction

[0012] Below in conjunction with specific examples, the implementation manner of the patent of the present invention is further described. It should be understood that these examples are only used to illustrate the patented invention and are not intended to limit the scope of the patented invention. In addition, it should be understood that after reading the content taught by the patent of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0013] The present invention is aimed at the difficult point of welding closure method, and measures are:

[0014] (1) Determine the closing temperature according to the closing time, accurately measure the closing gap and the influence of the temperature field on the closing gap, determine the length of the closing section and cut it.

[0015] (2) Use the lifting...

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Abstract

The invention relates to an integral welding closure method for a large orthotropically combined steel truss bridge, which comprises the following steps: setting a closure temperature according to closure construction hoisting time, measuring the closure gap at the temperature, jointing closed sections according to the result of the measurement, hoisting the closed sections by using four deck derrick cranes to a position, regulating the closed sections to put the closed sections in place, and after a closure temperature is reached and the closed sections are put in place, locking the closed joint by using a temporary locking device and eliminating the longitudinal locking of a girder at the position of a main tower to perform welding construction. In the invention, the closure time and closure temperature are reasonably determined, the length of the closed sections is accurately measured, the closure seam clearance is controlled to meet welding requirements, a welding process under constraints is evaluated, the reasonable welding process and sequence are determined, the reasonable temporary locking device is arranged, locking is performed after the closure gap meets requirements, welding is performed, and thus, the large-section integral welding closure is realized.

Description

technical field [0001] The invention relates to a method for connecting a closing section of a large bridge, in particular to a method for connecting a closing section of a steel structure truss bridge. Background technique [0002] At present, in the construction of the closure section of large bridges, due to the mature bolting construction technology and fast construction speed, the connection of the closure section is usually bolted. However, in the construction of the closing section of a large-scale truss bridge, the overall bolting and the bolting of the main rods and parts have their limitations. On the one hand, if the overall bolting method is adopted, due to the large structural size and poor overall rigidity, it will be difficult to position accurately. At the same time, the setting of the embedded parts will also affect the integrity of the bridge body. The construction of high-strength bolts Quality is also difficult to guarantee. On the other hand, if the ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K37/00
Inventor 顾海欢茅卫生李茂兴
Owner SHANGHAI FOUND ENG GRP
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