Design and monitoring analysis of a complicated deep foundation pit in Lanzhou

Taking a complicated foundation pit in Lanzhou as the background, the application of soil nailing walls, composite soil nailing walls and pile-prestressed anchors are respectively introduced, and the key construction technology is discussed. The monitoring results show that, the design scheme for the supporting is reasonable, the effectiveness is good, and the requirements of design and environment are satisfied. The experience of this project is significant to similar projects in Lanzhou.