At 5:44pm on July 26, the construction of the last deep cement mixing pile (DCM) of the Integrated Waste Management Facilities (HKIWMF) Phase 1 in Hong Kong was completed. This marked the successful completion of the foundation treatment works for the seawall and breakwater sections with more than 9,700 cement mixing piles, which took 593 days.
Located in the sea with a water depth of 12-17 meters and complex seabed geological conditions, this project is the first to design and construct deep cement mixing piles in offshore conditions in Hong Kong. After detailed technical planning, the project department solved 7 major technical issues, specified more than 20 technical provisions of the contract, and completed the optimization of 3 construction parameters of cement mixing piles and 2 items of stability modification of ships. The pass rate of cement mixing piles rose initially from 92% to over 99% at the breakwater section, which reduces the implementation cost of the project and the total project duration, and achieved a win-win