[Abstract] my practice unit is based engineering company in Shanghai, the project for the people's road tunnel project. The project contracted by the Shanghai Pioneer in the Group's total, the unit responsible for my internship shore Puxi section of the project works. I see the internship, the project has been opened to traffic, so I participated in the work of the main documentation for the completion of work related to the final acceptance of the quality, focus on accurate classification of various types of data. Work exposed to the drawings and data for me to foundation construction and engineering methods SMW Pile in which the use of a certain understanding. SMW in foundation pit has a special advantage, compared with other forms of maintenance has a short duration, low cost, pollution, and can adapt to the construction of a conservation-oriented society and the development of circular economy. At work, I deeply appreciate the foundation pit development and changes in recent years, the school class was very inadequate, in future work there are many things to learn. The main contents of this article SMW in the use of envelopes, including the characteristics of SMW technology, construction technology and processes, in the engineering example of the use of documents involved and my personal experience, feelings. 关键词]基础工程(Foundation Engineering)、SMW工法(SMW Engineering Methods)、基坑围护(Foundation Pit)、施工工艺(Construction Technology)。