Study on the possibility of lowering steel pipe piles on coral reefs at Truong Sa island of the rotary-press working kit installed on hydraulic excavators

1. Study on building a model to calculate the resistance components acting on the working tool when rotary-press down steel pipe piles on coral reefs.
2. Building a dynamic model for the problem of lowering steel pipe piles into the coral floor with the pile rotary-press tool taking into account the interaction mechanism between coral layers and steel pipe piles during the lowering process.
3. Development of a method to determine the appropriate working parameters and the ability to lower the steel pipe piles with the existing specifications of the working ministry in the geological conditions of coral reefs in the Truong Sa Islands.
4. Experimental construction was built for the first time to determine the parameters when rotary-press down steel pipe piles on the coral reefs in Truong Sa.