The Method of Determining the Location Between Arch Ribs of Steel Tube Arch Bridge by Coordinate Comparison Method
A steel tube arch bridge and contrast method technology, applied in the direction of arch bridges, bridges, bridge forms, etc., can solve the problems of difficult control of precision and difficult construction, and achieve the effect of quick construction, improved work efficiency, and guaranteed geometric shape and dimensional accuracy.
Active Publication Date: 2016-04-20
CHINA FIRST METALLURGICAL GROUP
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide a high-precision, simple and easy-to-use coordinate system in view of the characteristics that the precision of each section of the arch rib in the concrete-filled steel tube arch bridge is assembled in the air, and the accuracy is difficult to control and the construction is difficult. Method of Determining Position Between Arch Ribs of Steel Tube Arch Bridge by Comparison Method
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[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0020] The present invention selects two control points on the upper and lower chord side edge lines of the arch rib, and when the coordinate theoretical value and the actual value are consistent, the arch rib segments are accurately positioned and assembled to ensure that each segment of the arch rib The spatial position and the axis of the arch are consistent with the design.
[0021] steel pipe arch bridge figure 1 As shown, the construction arch axis coefficient of the steel pipe arch is a quadratic parabola. Since the instrument cannot be erected on the arch axis of the arch rib, but the rel...
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The invention discloses a method for locating arch ribs of a steel tube arch bridge through a coordinate correlation method. The method comprises the steps that in a theoretical assembling and locating map, the flange end face line of an upper chord tube of one arch rib is shifted downwards along a mounting and locating control line in the map for a preset distance, the intersection point of the shifting line and the mounting and locating control line is a first measurement control point, and the theoretical coordinate value of the point is measured; in the same way, a second measurement control point on a lower chord tube on the arch rib is found, and the theoretical coordinate value of the point is measured; in actual construction, the actual coordinate values corresponding to the two measurement control points of the arch rib are measured; the position of the arch rib is adjusted according to the theoretical values of the two measurement control points, and when the actual values are consistent with the theoretical values, the arch rib is assembled and located, and other arch ribs are assembled and located in the same way. The sections of the arch ribs are respectively located and adjusted through the coordinate correlation method, the space positions of the sections of the arch ribs and an arch axis can meet the design, and the line shape of the steel tube arch bridge is smooth and attractive.
Description
technical field [0001] The invention relates to the installation technology of a steel pipe arch bridge, in particular to a method for determining the positioning between arch ribs of a steel pipe arch bridge by using a coordinate comparison method. Background technique [0002] At present, there are many canal-spanning highway bridges in the main canal of the middle line project of the South-to-North Water Diversion Project under construction. The lower part of the bridge is a concrete structure, and the upper part is a steel pipe arch with a rigid steel pipe concrete truss structure. Concrete-filled steel tube arch bridge, as a new type of arch bridge, has been greatly developed in recent years because of its full use of concrete-filled steel tube concrete material, improved bearing capacity, good adaptability to bridge construction, simple construction, and beautiful appearance. [0003] The arch ribs on each side of the concrete-filled steel tube arch bridge are divide...
Claims
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IPC IPC(8): E01D21/00E01D4/00
Inventor 所玉敏魏凡
Owner CHINA FIRST METALLURGICAL GROUP