SMW工法是在水泥搅拌桩内插入H型钢的一种基坑围护施工方法,具有施工周期短、工程造价低、抗渗能力强、材料可重复利用、对环境影响小等优点,在深基坑围护中具备较大的技术经济优势。通过在杭州七格污水处理厂三期进水调节池及泵房基坑围护工程中成功应用,提出该围护方法在10m左右深度围护工程中值得进一步推广。 SMW method is a kind of foundation pit retaining construction method of inserting H-section steel in cement mixing pile, which has the advantages of short construction period, low engineering cost, impermeability, material reusability and small environmental impact. Pit enclosure with greater technical and economic advantages. Through the successful application in the third phase of the Hangzhou Qigang Sewage Treatment Plant and the pumping station pit protection project, this method is suggested to be further popularized in the depth of about 10 meters.