The purpose of minimum toe level is two-fold:
(i) In detailed design stage, ground investigation should be conducted and the approximate level of rockhead is known. Therefore, to avoid the marine piles to be founded prematurely on boulders, minimum toe levels of marine driven piles are specified in contract.
(ii) It provides sufficient length of soils for lateral and uplift resistance.
Note: Minimum toe level refers to the minimum level that a marine driven pile should be driven into seabed.
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This question is taken from book named – A Self Learning Manual – Mastering Different Fields of Civil Engineering Works (VC-Q-A-Method) by Vincent T. H. CHU.
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