Bracket counter pull loading pre-pressing device and tensioning pre-pressing method thereof

Abstract

The invention discloses a bracket counter pull loading pre-pressing device and a tensioning pre-pressing method of the bracket counter pull loading pre-pressing device, and belongs to the technical field of bridges. The bracket counter pull loading pre-pressing device is composed of an upper anchor system, a lower anchor system, steel strand bundles and tensioning jacks, wherein the upper anchor system is placed on a bracket, the lower anchor system is located below the upper anchor system, and the steel strand bundles connect the upper anchor system and the lower anchor system. The upper anchor system is composed of a plurality of distribution cross beams, at least two reinforcing longitudinal beams, a reinforcing cross beam and the tensioning jacks, wherein the distribution cross beams are placed on the top of the bracket, the reinforcing longitudinal beams are placed on the tops of the distribution cross beams, the reinforcing cross beam is placed on the tops of the reinforcing longitudinal beams, and the tensioning jacks are installed on the intersections of the reinforcing cross beam and the reinforcing longitudinal beams and on the top face of the reinforcing cross beam. The lower anchor system is composed of a plurality of sets of connection columns, double-splicing I-steel beams and anchor base plates, wherein the double-splicing I-steel beams connect the steel strand bundles and each set of connection columns, and the other ends of the steel strand bundles are fixed on the tensioning jacks. The bracket counter pull loading pre-pressing device and the tensioning pre-pressing method of the bracket counter pull loading pre-pressing device are rapid, effective and applicable.

Description

technical field [0001] The invention belongs to the technical field of bridges. Background technique [0002] The construction of prestressed concrete continuous beams generally adopts the erection of full-scale scaffolding or the cantilever pouring of hanging baskets. When the bridge pier is high or the scaffolding cannot be erected under the bridge, the hanging basket cantilever pouring construction can only be used. The premise of the hanging basket construction is that the 0# section must be completed on the bridge pier, and the 0# section construction is generally by pre-embedding the embedded parts on the top of the pier, and the installation bracket bears the load of the 0# section cantilever section and provides construction work at the same time space. [0003] After the brackets and hanging baskets are set up and before they are officially used, they need to be pre-pressed to detect the safety, elastic deformation and inelastic deformation of the brackets and han...

AI Technical Summary

Problems solved by technology

Conventional bracket preloading is preloading preloading. Preloaded concrete blocks, steel, water tanks, water bags, sacks of sand, etc. are commonly used as stocking materials. or steel) for transshipment, hoisting, and unloading work, the workload is large, the cost is high, and the time is long

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