How to conduct SPT on Site | Standard Penetration Test on Soil| Geotechnical Investigation Technique

#standardpenetrationtest #sptonsoil #SPTtestonsite
The Standard Penetration Test (SPT Test) is one type of in-situ soil test and It is conducted to determine the geotechnical engineering properties of subsurface soils, especially for cohesionless soil.
At every change in the stratum At intervals not more than 1.5 m
SPT Test is most widely used to check various parameters and properties of soil on the construction site. For any building foundation, design and construction soil testing are essential.
The test is extremely useful for determining the bearing capacity, density, and angle of shearing resistance of any soil. It can be used to determine the properties of cohesive and cohesionless soil. The Standard Penetration Test ASTM D1586
Significance Soil Penetration Test
By performing an SPT test we can find out,
• Angel of shearing resistance of cohesionless soils.
• The relative density of cohesionless soils.
• Unconfined compressive strength of cohesive soils.
Purposes of Standard Penetration Test
The spt test is conducted mainly for two purposes,
• Soil sample to identify the type and nature of the soil at various depths.
• To determine penetration resistance of soil at various depths this is used for geotechnical design purposes.
Tools for Standard Penetration Test
The requirements to conduct SPT are:
1. Standard Split Spoon Sampler
2. Drop Hammer weighing 63.5kg
3. Guiding rod
4. Drilling Rig.
5. Driving head (anvil).

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