Ernest Widjaja Email & Phone Number

Sydney, New South Wales, Australia

-Impact analysis of Sydney Water, TfNSW, Sydney Metro, and Sydney Train assets induced by proposed excavation.-Geotechnical Investigation to determine the quality of subsurface conditions such as drilling with SPT/DCP, and bedrock coring.-Geotechnical Inspection such as pile inspection and footing inspection.

Level 2, 25 Ryde Road, Pymble, Nsw 2073 Australia

Working for M12 Motorway Central (Kemps Creek, Sydney) with Seymour Whyte and Transport for New South Wales. Most responsibilities : -Pile Verifications Record (PVR) = Record the Drilling process such as logging the soil and rock condition based on AS 1726:2017 and Pell's Rock Classification. Ensure the shaft condition and the pile's cleanness before concreting will be started.-Proof Rolling Tester = Conduct proof rolling test in accordance with Test Method T198.-Drainage Investigation = Investigate soil condition before placing sand layer and drainage pipe.-QGIS = Prepare Aerial Photograph with Road Work Drawing for report's photograph purposes.-DCP = Measure of a material’s in-situ resistance to penetration. The test is performed by driving a metal cone into the ground by repeatedly striking it with an 8 Kg weight dropped from a distance of 2.26 feet (575 mm). The penetration of the cone is measured after each blow and is recorded to provide a continuous measure of shearing resistance.-In-situ permeability test.

Alexandria, Sydney

Relating to Mazda Parts, order, call customer, prepare parts for mechanics and customer, stocking.

Indonesia

• Geotechnical site investigations: -Creating proposals and budgets for up to 20 projects each year. -Managing the process of soil investigation in the field and laboratory. -Analysing and reporting the result of the soil investigation to Geotechnical Engineering Manager.• Geotechnical high rise building engineer -Contributed as Geotechnical Engineer for a multi-story building with 30 levels. -Arranged and made some soil parameter stratifications based on soil investigation reports and soil correlations. -Analysed deep foundations, settlement and uplift behaviours. (For settlement, We used settle 3D) -Analysed stability of excavation and retaining wall with Plaxis 2D. -Analysed the interaction of basement walls with the surrounding soil. -Analysed Geotechnical assessment related to the processing of sub-structure with the surrounding. -Plan dewatering systems for sub-structure purposes. -Reported the result to Geotechnical Engineering Manager, Upper Structure Engineer, and owner.• Loading Test, Plate Bearing Test, Pumping Test Engineer -Managing the process of testing based on ASTM on site. -Analysed and reported the result from testing to Geotechnical Engineering Manager.• PDA and PIT Engineer -Tester on-site with GRL USA equipment based on ASTM. -Gave temporary results about the condition of piles on site. -Analysed and reported the result from testing to Geotechnical Engineering Manager. (We used Capwap for PDA Test and PIT-W for PIT)