Abstract: Deep excavation engineering is a temporary supporting structure for the excavation of underground construction. It has the characteristics of the short service life, and the supporting structure will be out of service when the underground construction is completed. Therefore, the improvement of the cost effectiveness of the excavation supporting is becoming an imperative requirement of the entire construction industry. With a high construction cost, the strong soldier pile with a strong stiffness of the supporting structure is a major design trend of the urban deep excavation projects due to the restrictive requirements of the adjacent urban environments. In the deep excavation in thick and soft cohesive soil, the deformation and global stability could be adjusted the solider pile length, diameter and the number of steel reinforcement bars. The combined support and anchor system is a support system in which the support and the ground anchor are used simultaneously on a supporting system. Adding the ground anchor to the soldier pile supporting system can improve the stress and deformation of the support soldier piles, which can effectively reduce the overall construction cost of the support structure while meeting the safety requirements.

Key words: Deep Excavation, Mucky Soil, High Pressure Jet Grouting Ground Anchor, SMW Construction Method, Recyclable