扩孔锚杆与钢筋混凝土支撑组合支护体系在软土深基坑中的工程应用研究  

Research on the engineering application of the combined support system of reamed bolt and reinforced concrete support in deep foundation pit in soft soil

作　　者：苏文生 SU Wensheng(Fujian Provincial Institute of Architectural Design and Research Co.,Ltd.,Fuzhou 350001)

机构地区：[1]福建省建筑设计研究院有限公司,福建福州350001

出　　处：《福建建筑》2022年第5期87-90,共4页Fujian Architecture & Construction

摘　　要：结合实际工程,通过对常规多道水平内支撑方案对比分析,证明扩孔锚杆与钢筋混凝土支撑组合支护体系在软土深基坑的可行性。理论计算及监测结果表明,开挖15 m深度的基坑,采用两道扩孔锚杆加一道钢筋混凝土水平支撑,可以控制基坑深层水平位移在35 mm内,弯矩、剪力、轴力均满足设计规范要求;锚杆、水平支撑及桩体受力相对合理,且能缩短工期、降低成本。Combined with the actual project,through the comparative analysis with the conventional multi-channel horizontal internal support scheme,this paper proves that the application of the combined support system of reamed anchor rod and reinforced concrete in the deep foundation pit in soft soil is feasible in technology and economy.The practice results show that the excavation of the foundation pit with a depth of 15m adopts two reaming bolts and one reinforced concrete horizontal support,which can control the deep horizontal displacement of the foundation pit within 35mm,the bending moment,shear force and axial force meet the requirements of the design code,the stress of bolts,horizontal support and piles is relatively reasonable,and can shorten the construction period and reduce the cost.

关 键 词：基坑支护 内支撑结构 扩孔锚杆 软土基坑 组合支护体系 

分 类 号：TU4[建筑科学—土工工程]