Abstract: In a deep excavation supporting system, conventional ground anchor design approach is usually used for the jet grouted ground anchor design. It is recognized that this approach results in the conservative design and waste in the material. This paper presents a numerical analysis using ABAQUS commercial software on the excavation process of a deep excavation project. In the analyses, the design parameters optimization of jet grouted ground anchor is also performed. The effect of the jet grouted ground anchor length, magnitude of prestress and anchor inclination angle of the global stability of the deep excavation is also studied in this paper. The optimized jet grouted ground anchors are as follow: first layer anchor: 13 meters and 12 meters for the second layer with a prestressed forced of 150 kN and inclination angle of 15 degrees. This evaluation provides a case history for the deep excavation supporting structure design in similar conditions.

Key words: Deep Excavation, Jet Grouted Ground Anchors, Design Parameters, Numerical Simulation, Optimized Design