Steel Guide Beam for Pushing Long-span Steel Truss Girder
A steel truss girder and large-span technology is applied in the field of steel guide beams for jacking of large-span steel truss girder, which can solve problems such as technical difficulty
Active Publication Date: 2016-11-09
中铁十四局集团第三工程有限公司
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Problems solved by technology
The span of the jacking construction without pier directly determines the maximum cantilever length. With the increase of the cantilever length, the difficulty of construction design will increase geometrically. Therefore, it is technically difficult to make steel guide beams for large-span steel truss girders
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[0031] Embodiments of the present invention are described in detail below, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0032] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", " The orientation or positional relationship indicated by "left", "right", "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientation or positional relationship shown in the drawings, and only It is for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific or...
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The invention discloses a steel guide beam for pushing a large-span steel truss beam. The oblique rod is arranged in a "W" shape between the upper chord and the lower chord. The main body of the guide beam includes the first guide beam section at the front end, the second guide beam section at the rear end, the first guide beam section and the second guide beam section The third guide beam section with variable cross-section is connected together, the first guide beam section and the second guide beam section are composed of several segments, the distance between the segments forms the internode length, and the first guide beam section The ratio of the guide beam height to the internode length of the segment is equal to the ratio of the guide beam height to the internode length of the second guide beam section, and the guide beam height of the first guide beam section is smaller than the guide beam height of the second guide beam section. The present invention can design a guide beam of 120m to realize a maximum net cantilever of 160m and a maximum span of 180m to pass through the pier.
Description
technical field [0001] The invention relates to a steel guide beam for jacking up steel truss girders, in particular to a steel guide beam for jacking up large-span steel truss girders, which is suitable for the construction of jacking bridges and ensures the smooth pier and passing of the bridge during the jacking process. pier to improve the safety of the structure. Background technique [0002] At present, steel truss girders are more and more used in bridge structures. Many long-span steel truss bridges have been built in the world. The top push is 168m, which is the most successful case in China. The span of the jacking construction without pier directly determines the maximum cantilever length. With the increase of the cantilever length, the difficulty of construction design will increase geometrically. Therefore, it is technically difficult to fabricate steel guide beams for pushing large-span steel truss girders. Contents of the invention [0003] In order to ov...
Claims
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IPC IPC(8): E01D21/06
Inventor 周洪顺杨超张奉春栾昌信李伟王永强王希岗杨文良王海周
Owner 中铁十四局集团第三工程有限公司