Skempton's analysis for cohesive soils
0 likes2,214 views
Skempton's analysis provides an improved method over Terzaghi's equation for determining the bearing capacity of cohesive soils. For footing depths less than 2.5 times the base width, Skempton showed that the bearing capacity factors in Terzaghi's equation increase with depth. For deeper footings, Skempton provided an alternative equation to calculate the bearing capacity factor for rectangular footings. The ultimate bearing capacity of cohesive soils can then be determined using the cohesion value.
1 of 4
Download to read offline
Skempton's analysis for cohesive soils
- 2. Skempton's Analysis for Cohesive soils •Skempton (1951) has showed that the bearing capacity factors in 𝑁𝑐 Terzaghi's equation tends to increase with depth for a cohesive soil. For (𝐷𝑓/B) < 2.5, ( where is the depth of footing and B is the base width). ( )for rectangular footing =
- 3. • (𝑁𝑐) for circular and rectangular footing • For (𝐷𝑓/B) >= 2.5, (𝑁𝑐) for rectangular footing • Ultimate bearing capacity For • where cu is the undrained cohesion of the soil.