A steel truss girder single-section assembling sectional longitudinal dragging method
A steel truss girder dragging technology, which is applied in the field of steel truss girder single-section assembly and segmental longitudinal dragging, can solve the problems of difficult overall assembly of steel truss girders
Inactive Publication Date: 2019-01-15
中铁二十五局集团第三工程有限公司 +1
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[0003] The purpose of the present invention is to provide a method of segmented longitudinal dragging of steel truss girder single-section assembly, using segmented steel truss girders to solve the problem that steel truss girders are difficult to assemble as a whole in the construction field with narrow terrain
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[0026] Such as figure 1 and figure 2 The shown steel truss girder single-section assembled segmented longitudinal dragging method includes steel truss girders, tire racks for supporting steel truss girders, river-crossing supports 1, dragging tracks, dragging equipment and lifting devices 2, and steel truss girders are composed of A number of steel truss beam units are spliced together. The tire frame is spliced by several tire frame units. The dragging track is laid along the length direction of the cross-river support. The tire frame unit 3 is installed on the towing equipment, and the steel truss beam unit 4 is hoisted on the tire frame unit 3 by the lifting device 2;
[0027] Include the following steps:
[0028] a. Construct the river-crossing support 1 at the bridge construction point;
[0029] b. Lay the dragging track along the length direction of the river-crossing support 2, and set the dragging equipment on the dragging track;
[0030] c. After the tire fra...
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The invention discloses a steel truss girder single-section assembling sectional longitudinal dragging method, including steel trusses, a jig frame, a cross-river support, a towing track, towing equipment and a lifting device. The steel truss beam is composed of several steel truss beam elements. The jig frame is formed by splicing a plurality of jig frame units, the towing track is laid along the length direction of the cross-river support, the lifting device is arranged at one end of the cross-river support, the towing equipment is slidably arranged on the towing track, the jig frame unitsare installed on the towing equipment, and the steel truss beam unit is lifted on the jig frame units through the lifting device. The method comprises the following steps: a. constructing the cross-river support; b. laying the towing track and setting towing equipment on the towing track; c. after the jig frame unit and the steel truss unit of the first unit are installed, dragging the towing equipment forward to leave the assembling position of the second unit, and then the assembling the second unit, connecting the second unit to the first unit, and repeating the steps until the whole steeltruss beam is installed.
Description
technical field [0001] The invention relates to the technical field of bridge construction, in particular to a method for longitudinally dragging steel truss girders in single-section assembling and segmentally. Background technique [0002] The assembly method of steel truss girders generally adopts overall assembly, first build the cross-river support, then build a complete embryonic bridge on the cross-river support, and then complete the assembly of steel truss girders on the embryonic bridge, but the steel truss is under construction. In the process, we will face some situations where the terrain is relatively narrow. It is difficult to assemble the steel truss girder on site and it is difficult to unfold it. We have to make it in sections in the factory. The heaviest section is 19t. Parts transportation, hoisting and assembly, after calculation, a 130t crane is required. The design bearing capacity of the trestle bridge is 50t, but the total weight of the 130t crane p...
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CPCE01D21/00
Inventor 王革新张恩桥张连冰王小青李勇良周烽欧剑李江波黄合廖志泓杨磊罗江黄敏吴海清周武张双全谭剑卢祥中
Owner 中铁二十五局集团第三工程有限公司