围护体系结合前撑注浆钢管桩施工监测技术研究

Research on Construction Monitoring Technology of Steel Pipe Pile with Support System and Front Support Grouting

结合超大基坑施工实际,对围护体系中前撑注浆钢管桩的施工监测和深化设计进行了研究。通过采用前撑钢管桩注浆施工配合囊袋形式,结合软土地基超大基坑施工分区分块技术路线,提高了基坑围护的承载能力、施工效率和安全性,控制了基坑变形。现场实施和设计深化相互印证,为类似超大基坑围护体系施工提供了经验。

Combined with the construction practice of super large foundation pit,the construction monitoring and in-depth design of the front support grouting steel pipe pile in the retaining system are studied.By adopting the construction method of front support steel pipe pile grouting with the bag form,combined with the technical route of subdivision for super large foundation pit construction,the bearing capacity,construction efficiency and safety of foundation pit support are improved,and the deformation of foundation pit is controlled.The field practice and deepening design can confirm each other,which can provide experience for the construction of similar large foundation pit support system.