Introduction of Ankang Hanjiang Bridge?

Ankang Hanjiang Bridge, with the standard name of Shimiaogou Railway Bridge, is located on the special line of Ankang Hydropower Station in Shaanxi Province, near Shimiaogou Station of Xiangyu Railway, with a main span of 1.76 meters, leading the world in the span of similar railway steel bridges.

bridgework

1March, 980, technical design of inclined leg rigid frame was completed. The span of the main girder is 56+64+64+64+56m, and the spacing between the bottom hinges of the inclined legs is176m. The theoretical length of the inclined leg is 76.43 meters, and the inclination angle is 42 degrees and 53 minutes. Each diagonal leg is divided into two limbs and spread horizontally according to 1: 6. There are six cross bars between the two limbs to form a multi-layer frame, which is fixedly connected with the main beam at the corner nodes. The lower end of the inclined leg is supported on the hinge bracket of the inclined pivot. Inclined leg rigid frame is a ribbed box structure connected by bolts. The design adopts 16 manganese bridge low alloy steel, which is welded into beam sections in the factory and transported to the construction site by railway for installation.

The bridge started construction on July 1978, and all the pier and abutment works and the preparation for the construction of inclined leg rigid frame were completed by the end of June. 1982 Installation of inclined leg rigid frame began in February. The main engineering quantity of this bridge: the total steel consumption of inclined leg rigid frame is l652 tons, the prestressed concrete beam has 4 holes, which are 3 1.7 meters and 23.8 meters respectively, and the masonry of pier and abutment is 0/.5353 cubic meters, of which reinforced concrete is 672 1 cubic meter. Investment of the whole bridge1528.2l.

Architectural review

Inclined-leg rigid frame bridge is novel, with large span capacity and less steel consumption, and is suitable for steep slopes and deep valleys. Due to the initial trial production, there are many problems involved, and the construction period lasts for a long time, which increases the project cost. However, the completion of this bridge has accumulated a lot of experience in design, manufacture, construction and scientific research, which has opened up a new road for the development of long-span steel bridges. 1983, this bridge won the national gold medal for quality engineering.

Status: The bridge has become a dangerous bridge and the traffic has stopped.

Ankang Hanjiang bridge

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