The project is located in Sunhe Township, Chaoyang District, Beijing, with a total construction area of 219541.75m². The construction scope mainly included excavation support engineering of block 022; CFG Pile Ground Improvement for Building 1-18 and Anti-floating Anchor Bolt Project for garage. The construction started on January 18, 2019 and completed on August 30, 2019.
The project area was rich in groundwater, and the construction quality control of the water-stopping curtain of the rotary jet grouting pile was particularly important. For the construction of prestressed anchor in the complex soil layer or the soil layer with high water content, drilling with the pipe, grouting at the bottom of the hole or secondary splitting grouting are adopted to effectively control the construction quality. In the CFG pile construction, in order to avoid the situation of borehole intersection, the jumping drilling method was adopted to effectively ensure the construction quality. The project won the honor of "Excellent Contractor of 2019" and "Excellent Unit of Safe and Civilized Construction of 2019".