双排支护桩+预应力钢管斜撑+坑内加固组合基坑支护施工技术  

Construction Technology of Double Row Supporting Piles+Prestressed Steel Pipe Inclined Support+Pit Reinforcement Combined Foundation Pit Support

作　　者：赵成杰 林乐义 孙冲 ZHAO Chengjie;LIN Leyi;SUN Chong(The First Company of China Eighth Engineering Bureau Ltd.,Ji'nan,Shandong 250100,China)

机构地区：[1]中建八局第一建设有限公司,山东济南250100

出　　处：《建筑施工》2022年第12期2869-2871,共3页Building Construction

摘　　要：在深基坑工程中,常规的钢筋混凝土内支撑支护结构存在造价高、施工工艺复杂、安全性较差、后期破除噪声大、污染环境等不足。结合工程案例,提出双排支护桩+预应力钢管斜撑+坑内加固组合的深基坑工程支护施工技术,通过预先施加反作用力,充分发挥基坑底部土体及基础的自承能力,支护结构安全性高,实现变形的及时有效控制,节省了施工成本,保证了施工质量及安全,应用前景广阔,值得推广使用。In the deep foundation pit project,the conventional reinforced concrete internal support structure has many shortcomings,such as high cost,complex construction technology,poor safety,high noise and environmental pollution.Combined with a project case,the supporting construction technology of deep foundation pit engineering combined with double row supporting piles,prestressed steel pipe diagonal brace and foundation pit reinforcement is proposed.The self bearing capacity of the soil and foundation at the bottom of the foundation pit can be fully exerted by pre-applying the reaction force.The supporting structure with high safety can realize timely and effective control of deformation.It saves the construction cost,ensures the construction quality and safety,has broad application prospects,and is worthy of popularization.

关 键 词：双排支护桩 预应力钢管斜撑 坑内加固 深基坑支护 

分 类 号：TU753[建筑科学—建筑技术科学]