Vertical lifting and horizontal alignment lifting method of main chord member
A hoisting method and main chord technology, which is applied in the directions of transportation and packaging, load hanging components, erection/assembly of bridges, etc. It can solve the problems of heavy weight of steel truss arch members, narrow space of closing section, and inability to meet construction requirements, etc.
Inactive Publication Date: 2019-06-21
中铁十八局集团第二工程有限公司 +1
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Problems solved by technology
In the erection of this type of steel truss arch bridge, due to the narrow space reserved for the closing section and the heavy weight of the steel truss arch members when assembling near the closing section, the usual horizontal or integral hoisting can no longer meet the construction requirements
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[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0020] see Figure 1 to Figure 4 , a hoisting method for vertical hoisting and horizontal alignment of a main chord, which mainly involves vertical hoisting first and then horizontal alignment. The specific steps are as follows:
[0021] (1) Before the hoisting of the main chord 1, use high-strength bolts 8 to fix the vertical hoisting lug 2 on both sides of one end of the main chord 1, and the vertical hoisting lug 2 is hinged with a horizontal alignment conversion hanger through the pin shaft 3 4. Use high-strength bolts 8 to fix the horizontal alignment lug 7 on both sides of the other end of the main chord 1;
[0022] (2) Connect the vertical hoisting sling 5 to the vertical hoisting lug 2 through the horizontal alignment conversion hanger 4;
[0023] (3) Vertical hoisting: Lift the vertical hoisting sling 5 so that the main chord 1 vertically pas...
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The invention relates to a vertical lifting and horizontal alignment lifting method of a main chord member. The method is used for erecting of a large-span steel braced arch bridge and comprises following steps that before the main chord member is lifted, vertical lifting lifting lugs are fixed to the two sides of one end of the main chord member through high-strength bolts, and horizontal alignment conversion lifting parts are hinged to the vertical lifting lifting lugs through pin shafts; horizontal alignment lifting lugs are fixed to the two sides of the other end of the main chord member through high-strength bolts; a vertical sling is connected with the vertical lifting lifting lugs through the horizontal alignment conversion lifting parts; vertical lifting is carried out, wherein thevertical sling is lifted to enable the main chord member to vertically pass through narrow and small space of a steel braced arch closure gap; secondary hook fastening is carried out, wherein the horizontal alignment sling is connected with the horizontal alignment lifting lugs; horizontal alignment is carried out, wherein the horizontal alignment sling is lifted, and the main chord member is rotated to be in the horizontal state with the pin shaft as the shaft; and the main chord member is mounted in an alignment manner, and after the main chord member is mounted, the slings are loosened. The problem about difficulty lifting in the small and narrow space can be solved, and the method is suitable for lifting of the main chord member when the large-span steel braced arch bridge is erectedto be close to a closure segment assembly.
Description
technical field [0001] The invention relates to the field of steel structure hoisting, in particular to a vertical hoisting and horizontal alignment hoisting method of a main chord, which is used for erecting large-span steel truss-arch bridges. Background technique [0002] At present, more and more bridges adopt the steel structure truss system, especially the long-span steel truss-arch bridges in the mountains and valleys. In the erection of this kind of steel truss arch bridge, due to the narrow space reserved for the closing section and the heavy weight of the steel truss arch members when assembling near the closing section, the usual horizontal or integral hoisting can no longer meet the construction requirements. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for vertical hoisting and horizontal alignment hoisting of the main chord. In this method, the main chord is first lifted vertically throu...
Claims
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IPC IPC(8): B66C1/66B66C1/12B66C13/08E01D21/00
Inventor 于长彬董健刚张敏田波李惠民张喆
Owner 中铁十八局集团第二工程有限公司
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