Ultralong overweight concrete filling pile reinforcement type reinforcing steel bar caging

Abstract

The invention relates to a strengthening steel reinforcement cage of an ultra-long and heavy concrete cast-in-place pile. The strengthening steel reinforcement cage of the invention comprises a steel reinforcement cage which consists of a main vertical reinforcement and a spiral construction hoop surrounding the main reinforcement. The strengthening steel reinforcement cage is characterized in that rigid reinforcing devices are vertically distributed in the steel reinforcement cage section by section, and fixed with the steel reinforcement cage as a whole. The steel reinforcement cage of the invention has the advantages that the reinforcing devices are additionally arranged in the steel reinforcement cage of the ultra-long and heavy concrete cast-in-place pile with a large diameter, which can greatly improve the integral rigidity of the steel reinforcement cage and ensure that the steel reinforcement cage does not bend or deform when being lifted, and the solder joint of the steel reinforcement cage does not crack and loose, as well as guarantee that the steel reinforcement cage can be smoothly hoisted and installed in the hole.

Description

technical field [0001] The invention belongs to the technical field of building foundation construction operations, and in particular relates to a super-long and super-heavy concrete cast-in-situ pile reinforced reinforcement cage. Background technique [0002] High-rise buildings or buildings built on soft soil foundations generally use reinforced concrete cast-in-place piles to go deep into the ground tens of meters to bear the load of the superstructure. For holes that require depth and diameter, use mud retaining walls to prevent the soil on the hole walls from collapsing, and then use a crane to lift the horizontally bound steel cages into the holes. The reinforcement cage is composed of vertical main reinforcement and spiral structural stirrups surrounding the main reinforcement. The main reinforcement adopts round threaded reinforcement, and the structural stirrup adopts smooth round reinforcement. Generally, the diameter of the steel cage is within 1200m, and the le...

AI Technical Summary

Problems solved by technology

In some special projects, the design requires the pile to have a large cross-section and a long pile body, and a steel cage formed by general binding and spot welding is used. If the above-mentioned conventional lifting method is used to lift the steel cage, it cannot be realized.

Changes in the slenderness ratio and weight of the steel cage have caused a qualitative change in the hoisting method. Such a huge steel cage cannot be hoisted by conventional methods.

Without changing the existing structure of the reinforcement cage, when the reinforcement cage is lifted to a certain angle, the reinforcement cage will be bent and deformed, which will cause the solder joints of the reinforcement cage to crack and loosen, making it impossible to hoist into the hole

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