Expanded-base type pre-stressed composite anchor cable uplift pile and preparation method thereof

Abstract

The invention belongs to the field of underground construction, and particularly relates to an expanded-base type pre-stressed composite anchor cable uplift pile. The expanded-base type pre-stressed composite anchor cable uplift pile is characterized by comprising an uplift pile composite reinforcement cage, a composite anchor cable, a head expanding part and a filler, wherein the uplift pile composite reinforcement cage comprises an uplift pile cage outer wall and an uplift pile cage inner wall; the composite anchor cable is arranged between the uplift pile cage outer wall and the uplift pilecage inner wall, the composite anchor cable is composed of an isolation body and an uplift anchor cable body arranged in the isolation body, and the isolation body separates the corrosives from the uplift anchor cable body; the head expanding part is arranged at the drilling bottom; and the bottom anchoring end of the uplift pile composite reinforcement cage is arranged in the head expanding part. The expanded-base type pre-stressed composite anchor cable uplift pile is easy to drill, easy to construct, resistant to corrosion, good in supporting performance of the overall pile cage, high in uplift bearing performance of the bottom of the pile body and not prone to breaking of the pile top.

Description

technical field [0001] The invention belongs to the field of underground construction, and in particular relates to a bottom-expanding prestressed composite anchor cable uplift pile and a preparation method thereof. Background technique [0002] There are mainly 4 kinds of engineering situations that require the use of uplift piles: the groundwater level of the project is high, and the upper soil of the project is thin or the self-weight of the upper structure cannot offset the buoyancy of the groundwater. At this time, under the buoyancy of the groundwater, the engineering structure Or the whole will be subject to uplift force, causing the building to move upward. This situation mostly occurs in the basement of the building, underground parking lot and so on. At this time, it is necessary to design uplift piles to avoid these situations. [0003] Engineering structures may bear huge horizontal loads during construction or later use, such as bridge abutments, inclined pile...

AI Technical Summary

Problems solved by technology

[0012] In order to solve the problems that the above-mentioned steel strands will be disturbed and cannot be put into the bottom of the hole, the steel strands are easy to be corroded, especially the corrosion caused by the tiny cracks caused by groundwater entering the concrete due to tensile stress, and in order to make the bottom expansion piles truly play a role The invention provides a bottom-expanding prestressed composite anchor cable uplift pile and its anti-uplift pile, which is easy to enter the hole and easy to construct, has good corrosion resistance, good overall support of the pile cage, and strong uplift load-bearing performance at the bottom of the pile body. Preparation

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