Quality Control of Drilled Foundations for Base Cleanliness, Concrete Integrity, and Geometry

Analysis of the stress-strain state of problematic sections of the shaft of the mine using computer simulation

“…The most accurate information about the state of the shaft concrete lining and the cast-iron tubing can be obtained only by the experimental way [4], but it is often the complex problem due to the inaccessibility of the great amount of locations for the direct instrumental control [5]. Therefore, nowadays there are many methods for diagnosing the state of mine shaft lining elements, for example, field research [6], GPS monitoring [7], thermo sensors [8], methods of ultrasound tomography and shock echo [9], spectral and deformation analysis of the "shaft-arming" system for the vertical shafts [10], georadiolocation [11], etc. The mentioned methods can effectively provide data on the structures deformation but cannot prevent or predict the destruction of the elements in advance.…”