Abstract: With the developments of the urban projects, revitalization of the old cities and the popularity of skyscrapers, deep excavation supporting design methods become increasing diversified. Selection of a deep excavation supporting method that can minimize the impact on the adjacent environment and is also cost effective, is frequently encountered in the urban construction in the mountain area. This paper presents a case history of the deep excavation supporting design for an underground parking garage. The sparsely spaced soldier pile and ground anchor were used as the excavation supporting structure under the confined spacing and complicated adjacent environment. The application of the combined methods safeguards the excavation construction, minimizes the impact the nearby buildings and saves the cost and construction schedule.

Key words: Deep Excavation Support, Sparsely Spaced Soldier Piles, Manual Dugged Pile, Ground Anchors