以兰州市某复杂深基坑工程为背景,分别介绍了土钉墙、复合土钉墙以及排桩预应力锚杆在该工程中的应用,并论述了其关键施工技术。监测结果表明,该基坑工程支护设计方案合理,效果良好,满足了设计和环境的要求。本工程取得的经验对兰州市类似工程具有指导意义。 Taking a complex deep foundation pit project in Lanzhou as the background, this paper introduces the application of soil nailing wall, composite soil nailing wall and prestressed bolting of row piles in this project, and discusses its key construction technology. The monitoring results show that the engineering support design scheme of the foundation pit is reasonable and effective and meets the requirements of design and environment. The experience gained in this project has guiding significance for similar projects in Lanzhou City.