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Detection process for hole group of parallelogram web member

A technology of parallelogram and web bar, which is applied in the detection process field of parallelogram web bar hole groups, can solve the problems of different relative deviation values, inability to detect the relative size of the hole group, complex relative size of the wing plate and the web hole group, etc. Achieve high precision, solve measurement problems, and high work efficiency

Active Publication Date: 2013-02-20
CHINA RAILWAY JIUJIANG BRIDGE ENG +1
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AI Technical Summary

Problems solved by technology

The front and rear dislocation of the upper and lower flanges, the oblique web connection of the chord with the web inclined and the end hole group of the main truss oblique web beam are complicated. The angle of inclination deviates, and with the thickness of the web plate, the relative deviation value of each row of holes is also different, coupled with the influence of the welding height between the web plate and the wing plate, the conventional scribing and hanging line method cannot detect the hole group The relative size of

Method used

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  • Detection process for hole group of parallelogram web member
  • Detection process for hole group of parallelogram web member
  • Detection process for hole group of parallelogram web member

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Embodiment Construction

[0028] Such as Figure 1~Figure 11 shown, including steps,

[0029] 1) The standard splicing plate is installed on the standard beam head mold, and the standard splicing plate is not less than 10% of the number of bolt holes and 20% of the high-strength bolts; ( Figure 7 , Figure 8 )

[0030] 2) The web bar to be tested is placed on the platform and leveled; ( Figure 9 )

[0031] 3) Through the connection and positioning of the splice plate web and the standard beam head, the hole group on the web part should not be less than 10% of the number of bolt holes and 20% of the high-strength bolts; ( Figure 11 )

[0032] 4) The inspection contents include,

[0033] i. The rod detection should be carried out on the bench for level measurement, and the rod should be in a free state;

[0034] ii. After the standard beam head is installed in place, the flatness of the steel plate at the connection part of the high-strength bolts and the tightness of the connecti...

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Abstract

Disclosed is a detection process for a hole group of a parallelogram web member. A standard beam head mold can be adopted for solving the measuring problem. The standard beam head is a solid measuring mold produced through simulation of a structural size of a diagonal web member end, a connecting state of a bridge diagonal with a chord member is simulated, the standard beam head and a terminal plate of a finished web member or a chord member are positioned and bolted through a splice plate in a theoretical size and a certain amount of punching nails and high-strength bolts, after the assembly, and the contact ratio of bolt holes are detected to determine whether the hole group of the member pieces are qualified according to manufacturing specification requirements for railways and steel bridges. The process is high in precision and working efficiency, strong in operability and suitable for hole group detection of the parallelogram web member in cable-stayed bridge steel beam erection construction in which a whole node box type is adopted for an upper chord member and a lower chord member.

Description

technical field [0001] The invention relates to a parallelogram web hole group detection process, in particular to a hole group detection process using a parallelogram cross-section for the web joints of the upper chord member and the lower chord member of the integral node of the oblique truss and the main truss web member. Background technique [0002] Since the cable-stayed bridge with steel truss girder structure, the main truss has always adopted a rectangular cross-section, and the main truss members have a rectangular cross-section. The construction of steel truss girder cable-stayed bridges has become the trend of bridge construction in the future, which can not only meet the requirements of long-span structures on large rivers, but also reduce the cost of bridge construction (the manufacturing cost of steel bridges can be reduced by 15%). The front and rear dislocation of the upper and lower flanges, the oblique web connection of the chord with the web inclined and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/00
Inventor 王员根殷红韩博齐晓敏万纯兰何亮胡小珍付建辉李玉明韦文俊
Owner CHINA RAILWAY JIUJIANG BRIDGE ENG
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