Hoisting process of extra-large asymmetric steel structure bridge
An asymmetric steel structure technology, applied in the field of steel structure bridges, can solve the problems affecting the strength and service life of steel structure bridges and pier structures, the asymmetry of the center of gravity of the span, and the tendency to shake, so as to ensure the service life and balance , the effect of preventing collision
Inactive Publication Date: 2021-04-16
南通华川交通装备有限责任公司
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[0002] The hoisting of extra-large asymmetric steel structure bridges is generally designed according to the shape of the component, the position of the center of gravity, the hoisting weight, and the hoisting equipment to design the position, size, and shape of the lifting lugs. However, in the actual construction process, there are often restrictions from various factors. Use the existing lifting lugs to hoist structural parts, and for super large asymmetric steel structure bridges, how to select the hoisting center point according to the position of its center of gravity, how to choose the position of the lifting lugs to ensure the balance of hoisting, are all super large asymmetric steel structure bridges Difficulties encountered during hoisting
[0003] In the patent No. 201910052885.2, an asymmetric hoisting method for large components across the center of gravity, the problem of hoisting lugs for large irregular steel structures is solved by adjusting the strength of the lugs on the jib and the weld seam of the lugs, but it does not propose how to Precisely locate the specific position of the lifting lugs to improve the balance of hoisting, especially for hoisting in harsh windy environments. During the hoisting process, hoisting is carried out from top to bottom. In order to avoid collisions between steel structure bridges and piers, First hoist the steel structure bridge to a greater height from the pier, and then lower the steel structure bridge to the pier. The hoisting height is relatively high, and shaking is very easy to occur. The shaking phenomenon of the asymmetrical steel structure bridge is more obvious during the hoisting process. It is easy to collide with bridge piers, affecting the structural strength and service life of steel structure bridges and bridge piers
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[0032] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with the embodiments and accompanying drawings. The embodiments are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.
[0033] In this embodiment, a hoisting process for a super-large asymmetrical steel structure bridge, the specific steps include:
[0034] S1, set up the three-dimensional space entity model of asymmetric steel structure bridge 9, select the center of gravity position on the three-dimensional space entity model, draw a spherical body with the center of gravity as the center of circle on the three-dimensional space entity model, and intersect the upper end surface of the spherical body and the three-dimensional space entity model Record the coordinate position at the upper end face of the asymmetrical steel structure bridge 9 according to a pluralit...
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The invention relates to a hoisting process of an extra-large asymmetric steel structure bridge. The hoisting process comprises the following specific steps that S1, a three-dimensional space solid model of the asymmetric steel structure bridge is established; S2, cross beams are horizontally and outwards laid at the same side ends of two bridge piers; S3, a gantry crane enters into a field and lifts the asymmetric steel structure bridge, one end, away from an electric hoist, of a rope is fixed to a corresponding lifting lug, and the asymmetric steel structure bridge is lifted so that the height of the asymmetric steel structure bridge can be consistent with the height of cross beams of the two bridge piers; S4, the two ends of the asymmetric steel structure bridge are provided with sleeve bodies of a U-shaped structure in a sleeving mode; and S5, the electric hoist is started, and the lower portion of the asymmetric steel structure bridge is placed on the two bridge piers. The hoisting process has the advantages that a gravity center of the asymmetric steel structure bridge and positions of the lifting lugs are accurately positioned, so that hoisting balance is guaranteed, and meanwhile, two sides of the bridge are connected with a sliding device in the hoisting process and then slide on the cross beams to further guarantee the hoisting balance.
Description
Technical field: [0001] The invention relates to the field of steel structure bridges, in particular to a hoisting process for extra-large asymmetric steel structure bridges. Background technique: [0002] The hoisting of extra-large asymmetric steel structure bridges is generally designed according to the shape of the component, the position of the center of gravity, the hoisting weight, and the hoisting equipment to design the position, size, and shape of the lifting lugs. However, in the actual construction process, there are often restrictions from various factors. Use the existing lifting lugs to hoist structural parts, and for super large asymmetric steel structure bridges, how to select the hoisting center point according to the position of its center of gravity, how to choose the position of the lifting lugs to ensure the balance of hoisting, are all super large asymmetric steel structure bridges Difficulties encountered during the hoisting process. [0003] In the ...
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IPC IPC(8): B66C13/06B66C13/08B66C13/20B66C13/48B66C15/04B66C19/00E01D21/00
Inventor李建炎陆飞飞方荣光
Owner南通华川交通装备有限责任公司