Side-span-free closure section small side to main span ratio continuous rigid frame bridge and construction method thereof

Abstract

The invention discloses a continuous rigid-frame bridge with a small side-main-span ratio and a construction method thereof. The continuous rigid-frame bridge with small side-main-span ratio without side-span closing section of the present invention comprises foundation, cap, main pier, side pier, main girder, side-pier tension and compression support, side-span counterweight section and main-span closing section. The continuous rigid frame bridge with small side-main-span ratio without side-span described above does not have a side-span closure section; the side-main-span ratio is 0.5-0.55, and side-span counterweight sections and full-length prestressed tendons are provided on side spans. The present invention makes the structural stress meet the design and construction requirements by rationally configuring the prestress; the continuous rigid frame bridge with a small side main span ratio of the non-edge-span closure section of the present invention cancels the construction of the side-span cast-in-place section and the side-span closure section The construction is convenient and safe, the construction period can be shortened, and the construction cost can be saved.

Description

technical field [0001] The invention relates to a continuous rigid-frame bridge, in particular to a continuous rigid-frame bridge with a small side main-span ratio and a construction method thereof. Background technique [0002] The continuous rigid frame bridge has been unanimously favored by bridge designers due to its advantages of large spanning capacity, convenient construction, comfortable driving, and low cost, and has been widely used in highway construction in our country. In the completed continuous rigid frame bridge with variable cross-section, the side-to-main-span ratio is generally 0.55~0.58, and there are side-span closure sections and side-span support cast-in-place sections. The construction process is generally as follows: first complete the construction of the substructure, and then use the cantilever construction method to construct to the maximum cantilever state; erect the side-span support and construct the side-span cast-in-place section; then comple...

AI Technical Summary

Problems solved by technology

However, in the construction of continuous rigid frame bridges with high piers in mountainous areas, the construction process of side-span supports with high piers is complicated, the construction period is long, and it is not conducive to saving costs, and there are great safety hazards in construction on high supports

[0003] At present, the construction of the side-span cast-in-place section and the side-span closure section of the continuous rigid frame bridge with high piers has the above-mentioned problems, and there is a lack of a safe and economical design and construction method

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