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RE: Forces due to Frost Effects

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Bhavin,

Adfreeze forces are assumed to act normal to the pile surface.
Heave forces are developed when trapped water freezes within an annual frost
zone. Heave forces lift the foundation element.

Bill

-----Original Message-----
From: Bhavin Shah [mailto:bhavin.design(--nospam--at)gmail.com]
Sent: Monday, October 17, 2005 5:51 AM
To: seaint(--nospam--at)seaint.org
Subject: Forces due to Frost Effects


Dear All,

Sub : Forces due to Frost Effects

There will be two type of forces due to frost effects as per my
understanding :

1) Heave Force :

In soil (finer particles) containing water, due to frost effects water
from the unfrozen zone will be attracted towards frozen zone. This
will cause uplift force on the structure. This force will be acting on
the bottom (horizontal) surface of the foundation. Please discuss.

2) Addfreeze force :

Due to frost effects water containing in the soil particles will be
frozen. Force generated due to this effect is known as Adfreeze force.
The adfreeze force will act on the vertical surfaces of the foundation
and in vertical direction.

Please discuss whether Heave force and Addfreeze force will be acting
in the same (vertical) direction or opposite to each other.

Regards,

Bhavin Shah

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