Slope stability alarm

摘要

A method of generating an alarm indicating movement of a slope under inspection that sets an alarm if (1), where dX is a first measured displacement, dY is another measured displacement at a chosen difference from dX, and dZ is another measured displacement at a chosen difference from dY, and the corresponding times at which the chosen distances are measured are tA, tB and tC respectively for dX dY and dZ. So that an alarm is set if the ratio of the time taken for the slope to move between dY and dZ compared to moving between dX and dY is less than the ratio of the respective displacements.;tC-tBtB-tA

主权项

1. A method of generating an alarm indicating movement of a slope under inspection, said method including the steps of:
(i) setting at least three stability set points including a first set point, a second set point and a third set point; (ii) determining a first change between the first set point and the second set point; (iii) determining a second change between the second set point and the third set point; (iv) determining a change ratio of the second change over the first change; (v) determining a first time taken for a slope to exhibit change between the first set point and the second set point; (vi) determining a second time taken for a slope to exhibit change between the second set point and the third set point; (vii) determining a time ratio of the second time over the first time; and (viii) setting an alarm if the time ratio is less than the change ratio.