Method for manufacturing assembled type bridge pier by utilizing steel fiber reinforced self-compacting concrete

Abstract

The invention discloses a method for manufacturing an assembled type bridge pier by utilizing steel fiber reinforced self-compacting concrete. The method comprises the steps of preparing the concrete, prefabricating bridge pier segments, assembling the bridge pier segments, fixing the bridge pier segments and the like. By the adoption of the assembled type bridge pier manufactured through the method, construction and pouring quality can be guaranteed, the construction efficiency of a bridge is enhanced, and the seismic performance of the bridge pier can also be improved. The assembled type bridge pier is made of certain steel fiber reinforced self-compacting concrete, the comprehensive power performance of the segments is superior, and seismic performance of connector parts is 2-3 times that of existing common concrete prefabricated segments under the condition that structures and sizes are equal. The bridge pier segments in the structure are assembled in the mode that a shear key is connected with a short reinforcing steel bar in an inserted mode, the shock resistance, pier energy consumption, post-earthquake restoration in potential plastic hinge areas between the segments and other seismic-area dynamic properties are superior, and the method can be applicable to construction of the bridge pier. By the adoption of the steel fiber reinforced self-compacting concrete, concrete on the surface of a finished bridge pier is not prone to cracking, and therefore durability is good.

Description

technical field [0001] The invention relates to the field of bridge building construction, and particularly designs a method for preparing assembled bridge piers by using steel fiber self-compacting concrete. Background technique [0002] At present, the piers used in the substructure of bridges mostly adopt ordinary reinforced concrete structures, which are composed of ordinary concrete and steel bars. During construction, it is necessary to bind steel bars on site, set formwork, pour commercial concrete, and meet the use requirements after maintenance. On-site operations require large sites to place materials and formwork. When pouring concrete, manual vibration is required to ensure compactness. The pouring of densely reinforced joints is often not dense, and the finished steel-concrete structure piers are prone to cracking when subjected to bending moments. , resulting in a decrease in the durability of the pier column. [0003] In order to solve this problem, the segm...

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Problems solved by technology

[0004] However, theoretical calculations and experiments have proved that if ordinary concrete is used to assemble piers with dry joint segments, if the joints only use concave-convex shear keys, under the action of earthquake force, the following shortcomings will appear: 1. The joints of pier segments are prone to impact 2. The overall impact resistance of the bridge pier, the energy consumption of the pier body, and the post-earthquake repair of the potential plastic hinge area between segments are not good, so it is not suitable for use in earthquake-prone areas; 3. The finished product The concrete on the surface of the piers is easy to crack, and the durability needs to be improved

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