PILE TO MEASURE TANGENTIAL FORCES OF FROST HEAVING OF SOILS Russian patent published in 2012 - IPC E02D33/00 

FIELD: construction.

SUBSTANCE: using new elements - disconnection of hollow sections from a central anchor rod, provision of each hollow section, apart from the upper one, with a concentrically installed hollow stem with a support plate fixed on top of it and pulled coaxially via cavities of above sections and stems, and installation of force-measuring sensors in tiers above the pile head, and also installation of elastic pads into grooves in ends of hollow sections, - results in appearance of new properties in the proposed technical solution, namely, higher reliability, accuracy and duration of measurements of tangential heaving forces acting at driven piles in process of soil freezing, also by simultaneous measurement (with the help of the same force-measuring sensors) of friction forces of non-frozen soil, acting at hollow sections below the freezing limit and accounted in corrections to tangential heaving forces. Arrangement of force-measuring sensors in tiers above a pile head, making it possible to use removable plant-manufactured force-measuring sensors with high class of accuracy and to regularly calibrate them upon completion of each season of measurements, makes it possible to monitor reliability and accuracy of completed measurements.

EFFECT: possibility to carry out long-term measurements of tangential forces of frost heaving and friction forces of non-frozen soil increases reliability and accuracy of produced results due to taking into account a long row of measurement data in statistical processing.

2 cl, 5 dwg