Special-shaped reinforcement cage and construction method for special-shaped uplift pile

Abstract

The invention discloses a special-shaped reinforcement cage which comprises a cylindrical reinforcement cage body and at least one expanding part. Each expanding part comprises at least three umbrella ribs arranged around the cylindrical reinforcement cage body, wherein the umbrella ribs can rotate between a first set position and a second set position. When the umbrella ribs are located in the first set position, the special-shaped reinforcement cage can be freely placed in a pile hole using the special-shaped reinforcement cage body. When the umbrella ribs are in the second set position, the distance between the end portions of the free ends of the umbrella ribs and the central axis of the cylindrical reinforcement cage body is 1.5-3.5 times of the radius of the cylindrical reinforcement cage body. The invention further discloses a construction method for a special-shaped uplift pile using the above special-shaped reinforcement cage. The above special-shaped reinforcement cage is located in the expanding parts. The special-shaped reinforcement cage is simple in structure and can be in sufficient and even contact with concrete of a pile body when serving as a reinforcement structure of the uplift pile, and therefore the manufactured uplift pile can bear large anti-buoyancy force.

Description

technical field [0001] The invention belongs to the field of underground construction in the construction field, and in particular relates to a special-shaped reinforcement cage and a construction method of a special-shaped uplift pile. Background technique [0002] In recent years, with the rapid development of my country's economic construction, the application of underground engineering has become increasingly widespread. The development and utilization of large-scale underground garages, basements, civil air defense projects, underground plazas, and underground transportation have become more and more common, and the requirements for foundation depth are also increasing. come higher. However, due to the existence of groundwater, there is an upward buoyancy effect on underground buildings. If the buoyancy is too large, it will cause the building floor to bulge upward or the building as a whole to float, affecting the normal use of the building. At present, the commonly us...

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Problems solved by technology

However, the pile body has the following disadvantages: 1. The enlarged body is made of bulk materials through hammering and expansion. The noise and vibration generated during the construction process have a great impact on the surrounding environment, so it is not suitable for urban areas and surrounding areas with dense buildings. Construction; 2. It is difficult to precisely control the external expansion shape of the reinforcement cage

Due to the poor operability of this method, the use of this method is basically at a standstill.

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