This paper presented experimental and numerical model test of braced excavation to find out the variation of design parameters (i.e., bending moment and lateral deflection of the sheet pile wall, vertical ground settlement of backfill soil). The depth of the excavation, support system and geometry of the sheet pile were kept constant while internal friction angles ( \(\phi \) = 25 to 45 \(^\circ \) ) of the sand were varied. The results obtained from the developed numerical model of braced excavation were validated with the attached sensor data of the present experimental studies. The increment of the friction angle of the sand influenced the behaviour of design parameters of the excavation. In loose sand range (i.e., \(\phi \) = 25 to 32 \(^\circ \) ) the magnitudes of the design parameters decreased rapidly (approximately exponential) with the increment of \(\phi \) whereas, in case of medium dense sand range (i.e., \(\phi \) = 32 to 36 \(^\circ \) ) and dense sand range (i.e., \(\phi \) = 36 to 45 \(^\circ \) ), the magnitude of design parameters decreased linearly. The maximum normalized bending moment and lateral deflection of sheet pile decreased 28% and 34% respectively whereas a reduction of 28% was observed for vertical ground settlement for loose sand range.
