Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
19 Cards in this Set
- Front
- Back
|
Phases |
Desk Study Preliminary Reconnaissance Detailed Soil Exploration Lab Testing Report |
|
|
Desk Study |
Site plan, type of structure, importance of structure |
|
|
Preliminary Reconnaissance |
Site visit to provide general picture of geology and topography Compare to phase 1 and decide on extent of phase 3 |
|
|
Detailed Soil Exploration |
Determine geological structure of site Extent of each strata, groundwater condition, samples Perform on site tests |
|
|
Lab Testing |
Classify the Soil Determine soil strength, sentiment parameters, etc |
|
|
Report |
Write report |
|
|
Destructive Methods |
Boreholes Test pits (trial pits) |
|
|
Non destructive methods |
Seismic Survey Electromagnetic survey GPR |
|
|
Seismic Survey |
Waves travel through different materials at different speeds |
|
|
Electromagnetic survey |
Measure ground conductivity by induction |
|
|
GPR |
Imaging the soil |
|
|
Boreholes Log |
Elev of ground surface Depth and Thickness of each strata Depth that on site tests were conducted Soil classification of each strata Depth of water Moisture Content SPT values |
|
|
In Situ field tests |
Vane Shear Test (VST) Standard Penetration Test (SPT) Cone Penetration Test (CPT) |
|
|
VST |
Vane is pushed below borehole then torque is applied. From this, we can measure soil sensitivity (the effect of disturbance on the soil) |
|
|
SPT |
A 63.5Kg hammer is dropped from 760mm until a sampler is about 45cm into the soil. The number of blows for driving the last 30cm is the SPT number (N value). N value should be modified based on efficiency of hammer |
|
|
CPT |
Cone has base of 10cm^2 and 60° angle. Cone head measured resistance of soil and friction sleeve along shaft measures friction between soil particles |
|
|
Recovery Ratio |
Length of sample/ distance sampler was pushed Closer to 1, less disturbance |
|
|
Lab Tests |
Proctor Test Consolidation Test Triaxial Test Uniaxial Test Atterberg Limit Grain Size Dist Direct Shear Test |
|
|
Ground Water |
Ground Water conditions change based on rain, temp, human activity Frost heave is frozen ground water |
