Abstract: The No. 1 exchanging hall at Chaoyang station on line 6 of Beijing Metro, closes to the large buildings, is found to be a unique foundation pit structure. The inner support strengthening technology and shallow and deep foundation pit connecting board adding method is adopted to control the deformation of the structure. Ground reinforcing by means of jet grouting pile is used to control the settlement of the buildings. According to the monitoring data, the adopted technologies can effectively control the deformation of the structure and the settlement of the buildings. The paper can provide reference for similar projects in the future.

Key words: unique deep foundation pit, building, settlement, soil reinforcing