Estimated pile lateral capacity
Estimated pile lateral capacity
(OP)
Pretty new to deep foundation design and our structural is asking for estimated pile lateral capacity. We just completed our subsurface investigation and I haven't received any preliminary loads yet.
I don't have access to LPILE to develop a p-y curve but didn't know if this was standard procedure without any prelim loading. Anticipating 90-100' concrete prestressed square piles in mostly clay.
Thanks
I don't have access to LPILE to develop a p-y curve but didn't know if this was standard procedure without any prelim loading. Anticipating 90-100' concrete prestressed square piles in mostly clay.
Thanks
RE: Estimated pile lateral capacity
When we produce geotechnical interpretative reports we provide the lateral force that results in 12mm (half inch) deflection. This is taken as the allowable lateral capacity in my part (and other) parts of the world.
RE: Estimated pile lateral capacity
One of the graphs shows depth vs. displacement for 1, 2, 3, 4, and 5,000 lb lateral load at the top of pile.
We're just getting started with design, so I don't have any preliminary loads. Once I figure out the total lateral load on the building, the graphs will let me determine pile placement and number of piles tuned to the lateral deflection limits I'd like to keep.
RE: Estimated pile lateral capacity
If you dont have LPile, you can use Evans-Duncan method and calculate the lateral load that will result in 0.5 inch lateral deflection (y). You can find that in the Reese book "Single Piles and Pile Groups Under Lateral Loading".
RE: Estimated pile lateral capacity
"1810.3.3.2 Allowable lateral load. Where required by the design, the lateral load capacity of a single deep foundation element or a group thereof shall be determined by an approved method of analysis or by lateral load tests to not less than twice the proposed design working load. The resulting allowable load shall not be more than one-half of the load that produces a gross lateral movement of 1 inch (25 mm) at the lower of the top of foundation element and the ground surface, unless it can be shown that the predicted lateral movement shall cause neither harmful distortion of, nor instability in, the structure, nor cause any element to be loaded beyond its capacity."
RE: Estimated pile lateral capacity