深厚软土基坑中入硬土锚固锚索计算初探  

Preliminary study on calculaiton of anchor cable fixed into hard soil in deep soft soil foundation pit

作　　者：周汉香 周越洲 方小丹 ZHOU Hanxiang;ZHOU Yuezhou;FANG Xiaodan(Architectural Design&Research Institute Co.,Ltd.,South China University of Technology,Guangzhou 510641,China)

机构地区：[1]华南理工大学建筑设计研究院有限公司,广州510641

出　　处：《建筑结构》2023年第21期144-149,138,共7页Building Structure

摘　　要：基于香港科技大学(广州)深厚淤泥基坑工程实践与研究,对深厚软土基坑的桩锚支护结构,建立了分析模型。详细分析了锚索软土锚固段与硬土锚固段的不同受力、变形特征。采用弹性法计算软土段锚索受拉变形,采用剪切位移法计算硬土锚固段土体剪切位移,通过叠加软土段、硬土锚固段位移,可求得穿透软土锚固入硬土锚索的总位移,并求解出对应桩锚节点的位移。对多个软土基坑工程,采用该法计算穿透软土进入深部硬土层锚固的锚索总位移及其位移分量,并将计算结果与监测数据进行比对,两者总体吻合良好。Based on the engineering practice and research of deep silt foundation pit of HKUST in Guangzhou,an analytical model was established for the pile cable retaining structure of deep soft soil foundation pit.The detailed analysis was conducted on the different stress and deformation characteristics of the soft soil anchoring section and the hard soil anchoring section of the anchor cable.The elastic method was used to calculate the tensile deformation of the anchor cable in the soft soil section,and the shear displacement method was used to calculate the the shear displacement of the soil in the hard soil anchorage section.By overlaying the displacement of the soft soil section and the hard soil anchoring section,the total displacement of the anchor cable penetrating through the soft soil and fixing into hard soil can be obtained,and the displacement of the corresponding pile anchor node can be solved.For multiple soft soil foundation pit projects,this method was used to calculate the total displacement and displacement components of the anchor cables that penetrate the soft soil and enter the deep hard soil layer for anchoring.The calculation results were compared with monitoring data,and the overall agreement between the two are good.

关 键 词：深厚软土基坑 剪切位移法 弹性法 锚索 桩锚支护结构 

分 类 号：TU473.2[建筑科学—结构工程]