A 420 m x 40 m Berth and 13hectare (Ha) Container stacking yard is founded on 1400 mm ? bored cast-in-situ reinforced concrete piles. These piles were installed through the overburden material into the underlying rock in the onshore/offshore areas. As a part of work, two initial Pile Load tests with working load of 980 MT were carried out and tested to a load of 2450 MT. A total of 675 piles are in scope of work out of which 292 numbers are constructed as Marine piles using Jack-up Platform and 383 numbers of Land based piling by filling the backyard area by locally available sand. Out of two Pile Load Test one was Land based Pile Load Test and other was Marine Simulated Pile Load Test. There were apprehensions about quality of very weak to weak siltstone rock samples obtained during the boring of Piles which eventually resulted in increase of pile length for few initial piles. Solution to this problem by conducting unconventional investigation and optimization of pile length is described briefly in this paper.
Subjects: siltstone, marine simulated pile load test, core barrel, UCS tests
Author: Aditya S. Khatavkar, Design Engineer and Prakash S. Bansod, Assistant General Manager
Publisher: DFI