Construction method for long-span handle-basket arch bridge steel arch rib fastening and hanging system in high speed railway

Abstract

The invention discloses a construction method for a long-span handle-basket arch bridge steel arch rib fastening and hanging system in a high speed railway. The construction method is used for assisting in mounting long-span steel arch ribs and linear adjustment, the fastening and hanging system mainly comprises a fastening anchorage cable, a cable tower, an anchor cable and anchorage, a side wind-cable and anchorage and a fastening and hanging anchoring structure. Long-span steel arch ribs are hoisted through a segmental mode, each segment adopts a fastening cable to be hung and fastened, theupper end of the cable tower is aslant anchored to an anchor eye of a tension platform on the top of the cable tower, the cable tower and the corresponding anchor cable are simultaneously and symmetrically stretched and drawn, and the anchor cable is anchored to the anchor cable and anchorage in advance. The steel arch rib is hoisted through the segmental mode, each segment is fastened and hung with one set of fastening cable. The construction method for the long-span basket handle arch bridge steel arch rib fastening and hanging system in the high speed railway has the advantages that the steel arch rib segments are installed by adopting the cable-stayed fastening and hanging system, the technical problem of the long-span arch bridge construction under complex topography conditions suchas mountain areas, river valleys and the like is overcome, it is achieved that an arch bridge can be built without supports in mid-span, the dependence of bridge construction on topography and landform is reduced, the adjustment of installation linearis is convenient, the operability is strong, the overall structure layout is reasonable, safe and reliable, and the construction method for the long-span basket handle arch bridge steel arch rib fastening and hanging system in the high speed railway has popularization and application value.

Description

technical field [0001] The invention relates to the technical field of long-span arch bridges, in particular to a construction method for a steel arch rib buckle-hanging system of a large-span basket arch bridge. Background technique [0002] With the vigorous development of high-speed railways in my country, especially the vigorous construction of railway bridges in mountainous areas, the long-span basket arch bridge has the advantages of reasonable arch rib structure, uniform internal force distribution, good overall stability, strong spanning ability, and architectural features due to its unique structural form. Beautiful appearance and other advantages have become an important development direction in the field of bridge design and construction under the conditions of crossing large rivers and mountainous terrain. At present, more and more bridges in China adopt this type of structure. For example, the main span of the Beipanjiang Super Bridge on the Shanghai-Kunming High...

AI Technical Summary

Problems solved by technology

[0003] Long-span high-speed railway arch bridges are usually located in harsh terrain environments such as river valleys or mountainous areas. It is difficult to erect mid-span auxiliary supports. At present, high-speed railway construction standards are high, and it is difficult to control the alignment of long-span arch bridges.

Images