Design and monitoring of bracings for deep excavation of Hanguo Commercial Center in Shenzhen

The combined method of piles and anchor cables is practicable in deep excavations. By using this method, the deformation can be controlled, the working space can be provided for pile foundation, and the project cost can be saved. Based on the excavation of Hanguo Commercial Center in Shenzhen, the factors for the combined method of piles and anchor cables are investigated. According to the monitoring data, the deformation rules of piles and the bearing force on bracings are analyzed. Further discussion and researches about caculating interior bracings especially the circular inner bracings are carried out.