Device and method for monitoring pile body strain of round solid pile

Abstract

The invention discloses a device and method for monitoring pile body strain of a round solid pile. The device comprises the round solid pile, a single-mode sensor fiber, a Brillouin time domain analysis meter, glue and epoxy resin, the single-mode sensor fiber is fixed on the surface of the round solid pile through the glue and coated with the epoxy resin, and the Brillouin time domain analysis meter is respectively connected with the two ends of the single-mode sensor fiber. The method includes the steps of enabling the Brillouin time domain analysis meter to be connected to the two ends of the single-mode sensor fiber to form a measurement circuit; collecting initial data of the single-mode sensor fiber; collecting real-time data of the single-mode sensor fiber after the pile body of the round solid pile bears external loads; obtaining a difference of the real-time data and the initial data, wherein the difference is a pile body strain value under the pressure effect; further calculating a deformation value and the stress of the round solid pile according to the pile body strain value of the round solid pile. According to the method, the shortcoming that a traditional strain gage is hard in installation method and not high in rate of survival is overcome, and the distributed continuity monitoring on the pile body strain of the round solid pile is achieved.

Description

technical field [0001] The invention belongs to the technical field of strain monitoring devices, and in particular relates to a strain monitoring device and method for a circular solid pile body. Background technique [0002] The circular solid pile is a widely used pile type, which has the advantages of low production cost, simple construction process, low technical difficulty, large specific surface area, and high bearing capacity of unilateral concrete. Electric strain gauges are often used to monitor the strain of circular solid piles. Due to the complicated installation and layout of strain gauges and the low survival rate, continuous data on pile strain cannot be collected. At the same time, if too many strain gauges are embedded in the pile body, multiple strain gauge data lines must be derived along the pile body, which will affect the integrity and strength of the circular solid pile, and too many strain gauge connection lines are also easy to knot. In order t...

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Problems solved by technology

[0003] In order to overcome the problems of existing circular solid pile deformation measurement technology, the present invention provides a kind of circular solid pile pile body strain monitoring device, including circular solid pile, single-mode sensing optical fiber, Brillouin optical time domain analyzer , glue and epoxy resin, wherein, the single-mode sensing optical fiber is fixed on the surface of the circular solid pile by glue, the epoxy resin is smeared on the single-mode sensing optical fiber, and the Brillouin light The time domain analyzer is connected to both ends of the single-mode sensing fiber

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