When the soil layer surrounding a portion of the pile shaft settles more than the pile, a downward drag occurs in pile, then the drag is known as -
Negative skin friction
This downward drag or frictional force acting along the pile shaft due to the surrounding soil settling more than the pile is known as Negative Skin Friction . Negative skin friction adds an additional load to the pile foundation, which the pile must be designed to withstand in addition to the structural loads.
Important Questions from Bearing Capacity
A pile of length L per meter length is suspended at two points, the maximum B.M. at the center of the pile or at the points of suspension is
Which of the following statements is true?
Identify the state of sand, if the number of blow in the SPT test is more than 50.
Dilatancy correction for SPT N value is applied to:
Which of the following cases will result in reduction in the bearing capacity of soil?
i. Depth of water table below the base of the footing is equal to or greater than width of the footing
ii. Depth of water table below the base of the footing is less than width of the footing.
iii. Water table is at the level of base of the footing.
iv. Water table is above the base of the footing.
