Abstract: This paper presents the finite element analysis results of a deep excavation stability for a comprehensive utility culvert by using commercial software MIDAS GTS NX. The horizontal displacement of the soldier pile induced by the excavation, the settlement of the surrounding ground, and the axial force of the inner support were evaluated. The results show that the maximum horizontal displacement of the soldier pile is 8.56mm, which is at the base position; the surrounding surface settlement has an obvious “groove type”, and the maximum surface settlement is 17mm, which is at the position 12m away from the edge of the excavated area. The supporting axial force is greater than the inner supporting axial force of the first layer of concrete strut, which meets the requirements of the design value; the simulated data is in good agreement with the measured data. The deep excavation has good stability, which can provide guidance for subsequent construction.

Key words: Deep Excavation, Stability, Comprehensive Utility Culvert, Numerical Simulation