Abstract: For installation of prop structures, the effect of variables such as horizontal spacing, location as well as the pre\|stresses within the propos, on the performance of deep excavations is investigated through numerical analyses with site specific subsurface conditions. Based on the analytical results, the design of supporting structures for the deep excavation construction of a subway station in Zhengzhou City can be optimized. The improved design had a better performance in deformation control during the excavation and resulted in a significant cost savings.