Reinforcement cage lowering device for pile foundation engineering and construction method of reinforcement cage lowering device

Abstract

The invention discloses a reinforcement cage lowering device for pile foundation engineering and a construction method of the reinforcement cage lowering device. The reinforcement cage lowering device comprises a frame with lifting rings and leg bases arranged at the corners, a pair of turning plates which are oppositely opened upwards are arranged in the middle of the frame, and operation platforms and stress beams which can adapt to and hoist reinforcement cages of different sizes are arranged on the two sides of the frame; at the beginning, the two turning plates are closed and define a catheter lowering hole through semicircular notches in the edges of the turning plates, the upper portion of the stress beam is in sliding fit with a connecting plate in a non-disengagement mode, and scales and a clamping groove are formed along the line of the lower portion of the stress beam. During work, lifting hooks and limiting plates used for centering and limiting the pile casing are arranged on clamping grooves with corresponding scales in a sleeving mode according to the size of the reinforcement cages and the size of the pile casings, one end of a lifting rope is connected to the connecting plate, the other end of the lifting rope penetrates through a stiffening hoop at the tops of the reinforcement cages and then is upwards connected with the lifting hooks, and the lifting rope is marked with scales used for auxiliary positioning. The lowering device is high in lowering efficiency, low in cost, capable of adapting to multiple pile diameters, capable of being accurately lowered to the elevation, safe and reliable in construction, easy to operate and capable of being recycled.

Description

technical field [0001] The invention belongs to the construction field of building pile foundation engineering, and in particular relates to a reinforcement cage lowering device for pile foundation engineering and a construction method thereof. Background technique [0002] At present, during the construction of cast-in-situ piles, when the reinforcement cage is lowered, the reinforcement cage is welded with the hanging bars to ensure that it is lowered to the design elevation. This lowering method has the following problems: 1) The hanging bars cannot be recycled, which increases the cost; There is an error in the length of the reinforcement due to manual operation. If the reinforcement cage cannot guarantee the vertical state, it is easy to tilt, and there is a quality risk; 3) The main reinforcement of the hanging reinforcement and the reinforcement cage is welded, and the main reinforcement may be disturbed during the later earth excavation process, resulting in quality p...

AI Technical Summary

Problems solved by technology

[0002] At present, during the construction of cast-in-situ piles, when the reinforcement cage is lowered, the reinforcement cage is welded with the hanging bars to ensure that it is lowered to the design elevation. This lowering method has the following problems: 1) The hanging bars cannot be recycled, which increases the cost; There is an error in the length of the reinforcement due to manual operation. If the reinforcement cage cannot guarantee the vertical state, it is easy to tilt, and there is a quality risk; 3) The main reinforcement of the hanging reinforcement and the reinforcement cage is welded, and the main reinforcement may be disturbed during the later earth excavation process, resulting in quality problems. Hidden dangers; 4) Hanging bars are generally placed above the casing through cross bars, which may cause stress on the casing, resulting in settlement, and there will be errors in the pile elevation

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