Fiber reinforced concrete uplift pile

Abstract

The invention relates to a fiber reinforced concrete uplift pile which comprises a concrete pile body. A pile head is arranged at one end part of the concrete pile body; a FRP fiber reinforcement externally sleeved by a sleeve is arranged in the concrete pile body, one end thereof extends into the pile head, and the other end thereof reversely extends out of the concrete pile body; a second supporting plate is arranged in the pile head; one end of the FRP fiber reinforcement positioned in the pile head is fixed on a second supporting plate by a second anchorage device; a first supporting plate is sleeved at the other end of the FRP fiber reinforcement, and the other end of the FRP fiber reinforcement is fixed on the first supporting plate by a first anchorage device. Prestressing force isnot applied to the FRP fiber reinforcement, the sleeve is enwrapped on the periphery of the FRP fiber reinforcement and is not bonded with concrete; and relative slide can be generated between the sleeve and the concrete. The lower end of the FRP fiber reinforcement is tensioned by the supporting plates at the bottom part of the pile and the anchorage devices, and the upper end of the RP fiber reinforcement is fixed in a bearing platform by the supporting plates in the bearing platform and the anchorage devices; and the bearing platform is completely separated with the concrete of the pile body.

Description

technical field [0001] The invention relates to a fiber-reinforced concrete uplift pile. Background technique [0002] With the rapid development of the economy, the urban space is becoming increasingly scarce, which has triggered an upsurge in the development of underground space. The safe use of various underground projects is without exception affected by the buoyancy of groundwater. Therefore, the uplift pile has been more and more widely used in the project. application. The uplift piles are located underground, surrounded by soil and groundwater. In order to prevent the erosion of steel bars by groundwater and chemical substances, the design code has strict requirements on the crack control of the uplift piles. At present, the uplift pile generally adopts two forms of concrete pouring pile and concrete prefabricated pile, and the reinforcement ratio of the section is controlled by the crack resistance requirement. According to the provisions of the "Technical Specifi...

AI Technical Summary

Problems solved by technology

Different types of FRP tendons have different properties, but as new composite materials used in civil engineering, there are many commonalities between them: high tensile strength along the fiber direction; low density, light weight, easy construction; corrosion resistance; Excellent fatigue performance, etc., but the bonding performance between FRP fiber and concrete is not very mature

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