Comparison of measured and calculated temporary-prop loads at Canada WaterStation

The loads developed in tubular-steel temporary props during the constructio n of the London Underground Jubilee Line Extension (JLE) station at Canada Water were measured using vibrating-wire strain gauges. Prop temperatures w ere monitored and their influence on the prop loads assessed. Wall movement s were also measured, by means of inclinometers, In this paper, the tempera ture-normalized prop loads are compared with the results of modified limit equilibrium calculations, Prop loads and wall movements are compared with t he results of a series of parametric finite-element analyses carried out us ing the program CRISP. On the basis of the finite-element analysis results, the design assumptions giving the closest correlation between measured and calculated prop loads and wall movements are identified.