Physical basis of the remote monitoring method of pile foundations of building structures in permafrost areas

Abstract

The article discusses urgent problems for the northern regions of monitoring the integrity of piles and parameters of the surrounding soil by seismoacoustic and electromagnetic methods and the tasks of remote monitoring for a long time. The possibility of controlling the piles by measuring the intrinsic resonant frequency of the borehole by the acoustic method and the parameters of the surrounding soil using temperature and humidity sensors with an estimate of the tangent of the angle of loss of electromagnetic fields at frequencies of 0.02–1 MHz is estimated.

Transient Electromagnetic Monitoring of Permafrost: Mathematical Modeling Based on Sumudu Integral Transform and Artificial Neural Networks

“…Then, the right-hand side of (19) will correspond (up to sign) to the Sumudu image of the δ-function, which is equivalent to the stepwise switching on of the current at time t = 0. Thus, the solution to the boundary-value problem ( 19)- (20) will be the Sumudu image of the fundamental solution to problem ( 21)- (24) in time. By means of this solution and the convolution operation, one may calculate the electric field strength for an external current pulse with any time dependence.…”

“…In this connection, timely monitoring and decision-making seem to be critical for the sustainable development and economy of Arctic and high-altitude cold regions. Among the target monitoring objects are: highways [8,9]; railway lines [10,11]; airport runways [12,13]; engineering constructions at oil [14] and gas [15] fields; thawing zones around production wells during hydrocarbon extraction [16,17]; oil and gas pipelines [18,19]; fuel storage tanks [20,21]; bridge foundations [22,23]; pile foundations of buildings [24,25]; power transmission lines [26,27].…”