The performance of bitumen-coated piles in a number of case histories shows that bitumen coatings can be used effectively to reduce negative skin friction on piles. The shearing behavior of coated steel piles subjected to downdrag loads is investigated by means of laboratory tests. Based on the test results, a method for predicting downdrag loads on bitumen-coated piles is developed, and the important factors controlling coating effectiveness are identified. Predictions are than compared to field measurements.
No takes yet. Share an insight, caveat, or question.
Baligh et al. (1978) studied this question.