Abstract: This paper presents the deep excavation monitoring results of an underground parking garage of West Jinan New City project. The deep excavation was supported by the composited soil nail walls. The excavation and the supporting progresses are simulated by the three dimensional finite element analysis using ABAQUS. The simulated lateral displacement and vertical settlement at the ground surface near the excavation are compared with the measured values. The influences of micropile and seepage cutoff wall on the performance of the composite soil nail wall are also analyzed. The results indicate that the numerical model that includes the soil nail, seepage cutoff wall, micropile, and prestressed ground anchor can reasonably simulate the progress of the deep excavation supported by the composite soil nails.

Key words: Composite Soil Nail Walls, ThreeDimensional Numerical Model, Field Monitoring, Comparative Analyses