49 The following tests were performed at the ground surface to determine the value E, the Young's modulus, and the coefficient of clastic uniform compression for the design of a compressor foundation at a site. Table 4.6 Vertical-vibration test data Angle of settling of eccentric masses Amplitude al resonance mm Serial no. H2 1 OLA A UN- 15 30 45 60 120 140 35.0 32.0 31.0 29.5 28.0 0.06375 0.150 0.210 0.30 0.525 0.620 27.0 124 SOIL DYNAMICS (a) A vertical vibration test was made on an M-150 concrete block 1.5 x 0.75 0.7 m high, using different eccentricities of the rotating mass of the oscillator. The data obtained are given in Table 4.6. (b) A cyclic-plate-load test was made on a plate 70 x 70 cm. The elastic settlement corre sponding to a load intensity of 2.5 kg/cm was 6,00 mm. (c) A wave-propagation test gave an average value of travel time of compression waves as 0.02 , corresponding to a distance between geophones of 6 m. The water table at the proposed location is 2.0 m below the proposed depth of the foundation of 3.0 m. The base contact area of the foundation is 10 x8 m. Compute the values of Eand C- 49 The following tests were performed at the ground surface to determine the value E, the Young's modulus, and the coefficient of clastic uniform compression for the design of a compressor foundation at a site. Table 4.6 Vertical-vibration test data Angle of settling of eccentric masses Amplitude al resonance mm Serial no. H2 1 OLA A UN- 15 30 45 60 120 140 35.0 32.0 31.0 29.5 28.0 0.06375 0.150 0.210 0.30 0.525 0.620 27.0 124 SOIL DYNAMICS (a) A vertical vibration test was made on an M-150 concrete block 1.5 x 0.75 0.7 m high, using different eccentricities of the rotating mass of the oscillator. The data obtained are given in Table 4.6. (b) A cyclic-plate-load test was made on a plate 70 x 70 cm. The elastic settlement corre sponding to a load intensity of 2.5 kg/cm was 6,00 mm. (c) A wave-propagation test gave an average value of travel time of compression waves as 0.02 , corresponding to a distance between geophones of 6 m. The water table at the proposed location is 2.0 m below the proposed depth of the foundation of 3.0 m. The base contact area of the foundation is 10 x8 m. Compute the values of Eand C