Determination of Lateral Capacity of Piles for Bridge Foundation
Determination of Lateral Capacity of Piles for Bridge Foundation
(OP)
I am currently redesigning a 3 span, single lane bridge. According to my calculations, the bridge is failing due to sliding, but I have not considered the lateral capacity of the pile (2 rows of 6 piles each) as a part of the resisting forces. I would like to include these in order to avoid increasing the dimensions of the footing, but the soil geotechnical report does not provide these values. Is there a way that I can estimate this? Also, should I consider the piles acting together as one unit or individually?
The piles are concrete (.3m x .3m) spaced at 1.36m apart center to center. The soil at the tip of the pile is considered to be "dense to very dense gray coarse gravel"
Thank you
The piles are concrete (.3m x .3m) spaced at 1.36m apart center to center. The soil at the tip of the pile is considered to be "dense to very dense gray coarse gravel"
Thank you





RE: Determination of Lateral Capacity of Piles for Bridge Foundation
www.PeirceEngineering.com
RE: Determination of Lateral Capacity of Piles for Bridge Foundation
www.PeirceEngineering.com
RE: Determination of Lateral Capacity of Piles for Bridge Foundation
www.PeirceEngineering.com
RE: Determination of Lateral Capacity of Piles for Bridge Foundation
Thank you for your response. Unfortunately, I do not have access to this software, and I am unable to get this information from the geotech consultant. The bridge is actually located in Cambodia, and many of the consultants used for the project are difficult to contact. Is there any method for conservatively estimating the lateral capacity of the piles without the use of software? I found some specs used in India, which require calculating the force needed to displace the pile by 5mm, and using this force as the lateral capacity. This method requires analyzing the pile as a cantilever and determining the point of fixity of the pile. Unfortunately, I also do not know how to determine the point of pile fixity, but was assuming that approximating ~1/3 of the pile length would be sufficient. Do you have any further recommendations? Thank you again.
The soil characteristics are as follows:
firm brown silty clay (2m)
loose brown, yellow silty fine to coarse sand (4.5m)
medium dense light-gray clayey coarse sand (1.5m)
stuff yellow, gray silty clay (1.5m)
dense to very dense gray coarse gravel (6m)
*pile length is 10m
RE: Determination of Lateral Capacity of Piles for Bridge Foundation
www.PeirceEngineering.com
RE: Determination of Lateral Capacity of Piles for Bridge Foundation
RE: Determination of Lateral Capacity of Piles for Bridge Foundation
RE: Determination of Lateral Capacity of Piles for Bridge Foundation
https://law.resource.org/pub/in/bis/S03/is.2911.1....
As a side note, unfortunately, FHWA no longer has COM624 available for download.