Device for preventing arch frame from rolling over in dragging process
A technology of dragging and rolling over, applied in the erection/assembly of bridges, bridges, buildings, etc., can solve the problems of large overall weight, construction accidents, rollover, etc., and achieve the effect of avoiding dragging, increasing strength, and avoiding tilting
Active Publication Date: 2014-03-26
中铁二十五局集团第二工程有限公司 +2
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Problems solved by technology
However, this method has brought new problems. The overall weight of the support and arch ribs moving along the drag runway is extremely high. Once deflection occurs during the movement, there will be a possibility of rollover, which may cause construction accidents
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[0010] A device to prevent the arch from rolling over during the dragging process, such as Figure 1-3 , including a bracket 1 supporting the arch frame. The bracket is provided with four outriggers 2 at the positions of the guide beams on both sides. A three-dimensional jack 4 is arranged at each end, and the three-dimensional jack supports the I-beam from both ends, and can drive the two ends of the I-beam to move longitudinally, horizontally and vertically; On the platform 6, the walking trolley is placed on the track 8 above the dragging runway 7; the device for preventing the arch from rolling over during the dragging process also includes a total station for measuring the eight end coordinates of the front and rear ends of the arch rib, At the corresponding positions of the eight ends of the front and rear ends of the arch rib, there are respectively provided with light targets used for measuring with the total station.
[0011] The bottom of the moving track of the arc...
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The invention discloses a device for preventing an arch frame from rolling over in a dragging process. The bottoms of support legs of a bracket for supporting the arch frame are fixedly arranged on I-shaped steel, wherein the bottom of the I-shaped steel is supported by three-dimensional jacks which are arranged on workbenches of traveling trolleys moving in a rail above a dragging runway; light targets are arranged at corresponding positions of eight end parts of front and rear ends of arc ribs respectively; a total-station instrument is used for measuring coordinates of the eight end parts of the front and rear ends of the arch ribs. According to the device, the coordinates of the end parts of the arch ribs can be readjusted to be consistent to avoid the inclination of an arch bridge and the bracket by driving the I-shaped steel supported bracket and the arch ribs to move through the three-dimensional jacks or strengthening the strength of the bracket when longitudinal coordinates or perpendicular coordinates, measured by the total-station instrument, of the corresponding positions of the front and rear end parts of the arch ribs are inconsistent due to the fact of inconsistent movement distances of the two sides of the arch ribs or excessive deformation of a single side of the bracket, so that the arch bridge and the bracket are prevented from being inclined, accordingly, the arch bridge and the bracket are prevented from being dragged in an inclined state, and rollover caused by the dragging in the inclined state is prevented.
Description
technical field [0001] The invention relates to the erection technology of the arch frame of a steel pipe arch bridge, in particular to a device for preventing the arch frame from rolling over during the dragging process. Background technique [0002] During the construction of long-span steel pipe arch bridges spanning existing railway hub stations, due to the requirements of railway electrification safety regulations and railway operating conditions, large-scale hoisting machinery and equipment cannot be stationed. Due to this limitation, when constructing the steel pipe arch bridge, we adopted the method of building a drag runway, erecting supports at the end of the drag runway, hoisting and fixing the arch frame on the support, and then moving the arch ribs hoisted at the end along the drag runway by the support. method in place. However, this method has brought new problems. The brackets and arch ribs moving along the drag runway have a huge overall weight. Once deflec...
Claims
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Inventor 李正元彭思甜范波隋瑞凌贺德林谢赛军郑文超张部伟段君良蔡文胜符望春方振华陈海军
Owner 中铁二十五局集团第二工程有限公司