Dhoho International Airport, Kediri
Location : Dhoho International Airport, Kediri, Jawa Timur
Method: Stone Column (SC), CFG Pile, Down-hole Dynamic Compaction (DDC)
Project Duration: September 2020 – August 2022
Dhoho International AirportKediri airport is the first privately developed airport in Indonesia. Located 150 kilometres south-west of Surabaya, the airfield and associated buildings cover a vast area of 330 hectares.
Dhoho International Airport will have a runway of 3,300 meters with a runway width of 45 meters to serve as a runway for aircraft with large loads. The total land area reaches 371 hectares. With a terminal area of 18,000 square meters, the airport is projected to have a capacity of 1.5 million passengers annually. As an international airport, Dhoho Airport also serves international flights for the purposes of Hajj and Umrah.
Design and construction of the earthwork for the platform are considered complex. It consists of intricate cut and fill work up to 30 meters high on the slope of Mount Willis, which requires the use of various ground improvement techniques.
Some ground improvement works at certain areas are required to overcome the settlement. Settlement analysis is evaluated using finite element analysis. The work of Stone Column (SC) and Down-hole Dynamic Compaction (DDC) with a total of approximately 41,412 piles have been completed.
Most of the platform above the runway has high fill embankment and requires a Ground Improvement to mitigate consolidation settlement.
The design criteria for the maximum settlement due to embankment on the runway are 20mm/1 year and 100mm/10 years and differential settlement must meet the criteria for serviceability of 30mm/45m or 1:1500 based on the International Civil Aviation Organization.
For the 23-meter-high fill embankment, the existing soil has been improved using the stone column (SC) method to mitigate consolidation settlement.