某综合楼基坑支护设计

摘要

The foundation pit of some building complex is located in sand layer with shallow underground water and complex surrounding conditions which causes great difficulties for excavation.In light of the features of the project,study is carried out on the conventional surrounding support and support system and continuous wall by borehole grouting reinforced with H shape steel＋composite inner bracing is selected which is characterized by proper stress,simple process.With wasted cement,the change from inner cement mixing to outer cement mixing can uproot conventional problems and reduce its impact on nearby buildings.%某综合楼基坑位于砂性土层中,地下水埋深较浅,开挖深度较大,基坑周边条件复杂。针对本工程的特点分别对常用的基坑围护和支撑体系进行了分析研究;选择钻孔后注浆连续墙内插H型钢＋组合内支撑的支护体系结构受力合理,施工工艺简单,利用废弃的泥浆,由孔内搅拌水泥土改为孔外搅拌水泥土,能够彻底杜绝传统水泥土易出现的＂千层饼＂和＂鸡蛋芯＂等质量问题,减少支护结构对临近建筑的影响。