Technical Specifications

Specifications

• A self-contained facility for study of flow through permeable media.
• The tank has a toughened glass front and aluminium back to permit the insertion of pressure tappings as required. Six tapping points are provided. 
• The design of the side supports allows free access to the interior with minimum sight. 
• Supply includes sump tank, pump, starter and control valve. Also a dye injection system and a with Comprehensive instruction manual data sheets and student experiments.
• Working Section 1500mm X 100mm X 600mm.
• Basic Accessories
• Foundation pressure plate
• Straight permeable membrane
• Curved permeable membrane
• Lateral pressure plate
• Tile drain
• Overall Dimensions Length: 1.60m Width 0.60m Height: 1.45m
• Optional:
• DAQ Computer interface & LabView Software
• ‘Sci-Cal’ Computer Control Software & Interface

Some Practical Possibilities of the Unit:

1. Flow net construction
2. Flow line
3. Verification of Darcy´s
4. Comparison of experimental results with analytical
5. To determine seepage
6. Seepage through an earth dam
7. Seepage underneath a sheet pile
8. Control of seepage through permeable soils by sub-soil
9. To reduce uplift pressure and lateral thrust by
10. Distribution of uplift pressure on hydraulic
11. Behavior and formation of
12. To drain an excavation site using
13. Stability of an earth
14. Comparison of permeability according to the grain
15. Sheet pile wall:
    • Study of the soil
    • Flow lines
    • Calculation of the equipotential
    • Pressures
16. Permeability of the phreatic layer
    • Study of the soil
    • Flow lines
    • Calculation of the equipotential
    • Measurement of the infiltration speed
    • Verification of the Law of
17. Flow through an earth dam:
    • Study of the soil permeability
    • Flow lines
    • Calculation of the equipotential lines
    • Pressures distribution
    • Effects of the layer inclination

Experiment Capabilities

1. Determination of seepage beneath a structure
2. Construction of fl ow nets and determination of coefficient of permeability
3. Flow under a sheet pile and determination of critical seepage force at which ‘piping’ occurs
4. Seepage flow under an impermeable dam
5. Flow through an earth dam with and without a toe drain
6. Drawdown in horizontal flow (simulation of ground water flow into a river or well)
7. Determination of uplift pressures on structures such as building foundations
8. General studies of seepage and drainage
9. Flow through a porous medium (Darcy’s law)

Typical student experiments include:

• Seepage underneath a sheet pile wall
• Seepage through an earth dam
• Control of seepage through permeable soils by sub-soil drainage
• Distribution of uplift pressure on hydraulic structures
• Reducing uplift pressure and lateral thrust by drainage
• Formation and behaviour of ‘Quicksand’
• Stability of an earth dam
• Draining an excavation site using wells 

Required Services

– Electric Supply 220 ~ 240 V AC,  Single Phase , Earthed.