Device and method for remote real-time online monitoring and evaluation of pile foundation stability in freeze-thaw environment

Abstract

The invention relates to an apparatus and a method for remote real-time on-line monitoring and assessment of the pile foundation stability in the freezing-thawing environment. The apparatus comprises a signal receiver, a signal line, a reinforced concrete pile, intelligent aggregates, a temperature sensor, a vibration exciter, an underground signal line, a PZT piezoelectric ceramic plate, a data transmission unit (DTU), a GPRS network, servers, and a user terminal. The apparatus and the method are advantageous in that remote real-time on-line monitoring and assessment of the development of seasonal soil frost heaving in cold regions are realized; the monitoring method is simple and easy; quantitative assessment of the evolution of the stability of the pile foundation in the development process of soil frost heaving is realized; measuring results are accurate and reliable, and real-time assessment and early warning of the pile foundation stability are realized via the analysis of measured data so that remedial measures can be taken in time before the instability of the pile foundation.

Description

technical field [0001] The invention relates to the field of pile foundation stability monitoring in cold regions, in particular to a device and method for remote real-time on-line monitoring and evaluation of pile foundation stability in freeze-thaw environments. Background technique [0002] During the freezing process, the internal temperature field of the soil is not uniform, and the development of freezing is not uniform, so that the distribution of frost heave force along the length of the pile body is uneven. The frost-heaving force of the soil body is small, and even because the soil is in an unfrozen state, there is no frost-heaving force. Therefore, the pile foundation diseases in cold regions mainly manifest in two forms: during the freezing process, with the development of the freezing depth, the frost-heaving force of the soil gradually increases. development, when the frost heaving force of the soil around the pile develops to a certain extent, the pile body wi...

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Problems solved by technology

However, this method is labor-intensive, time-consuming and labor-intensive, and the error of measurement results is relatively large.

[0005] Due to the unpredictability of climate change, the current engineering technology cannot actively control the stability of pile foundations in cold regions, let alone monitoring and evaluation functions. In the long-term operation process, there is a lack of sufficient quantitative measurement of the stability of pile foundations and evaluation methods for targeted reinforcement guidance

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