Application of Anchor-pulled Sheet Pile in Deep Foundation Pit in Soft Soil Area

Taking a deep foundation pit in Hengqin New Area, Zhuhai City, Guangdong Province as an example, in order to ensure construction safety and create favorable conditions for the construction of the pit-in-pit structure, this study, in combination with the complex surrounding environment of the project, adopted the anchor-pulled double-row sheet pile support form and monitored and evaluated its design and construction effects, aiming to provide technical references and practical experience for deep foundation pit support projects in deep soft soil areas. This study took this deep foundation pit project as the object and analyzed in detail the geological conditions of the deep soft soil layer and the characteristics of the surrounding environment. In the design stage, the connection nodes of the front and rear two rows of sheet piles were particularly strengthened. During the construction process, the anchor-pulled double-row sheet pile support form was adopted, and the deep horizontal displacement of the sheet piles and the ground settlement around were dynamically monitored through real-time monitoring means. The monitoring results show that the deep horizontal displacement of the front and rear two rows of sheet piles and the ground settlement around are all within the range required by the specifications. This indicates that the adopted anchor-pulled double-row sheet pile support scheme has good feasibility and reliability in deep soft soil areas, and can effectively control the deformation of the foundation pit and ensure construction safety. The application effect of this support scheme in deep foundation pit projects in deep soft soil areas is significant and has certain application prospects. Its successful experience can provide useful references for deep foundation pit projects under similar geological conditions.