Experimental Study on Nonlinear Seepage Characteristics and Particle Size Gradation Effect of Fractured Sandstones

Figure 3

Seepage experimental system of fractured rock mass. (a) The whole composition of the system. A: seepage pressure supply system; B: axial pressure supply system; C: seepage system; D: data collection system; E: permeable mixture collection system. (b) Supply system of seepage pressure. 1: variable displacement piston pump; 2: cooler; 3: throttle; 4, 13: spill valve; 5, 12: pressure gage; 6, 11: reversing valve; 7: double-action hydraulic cylinders; 8: pressure transmitter; 9: flow transducer; 10: globe valve; 14: fixed displacement piston pump. (c) Osmoscop. 1: baseplate; 2: strainer; 3: cylinder barre; l4: cover plate; 5: squeeze head; 6: upper porous plate; 7: specimen; 8: bolt; 9: nut; 10: flat washer; 11: spring washer; 12: water exit; 13: water entrance; 14: ohne hauch rubber seal; 15: lower porous plate.

(a)

(b)

(c)