桩锚支护基坑变形监测分析  

Deformation monitoring and analysis of pile-anchor supported excavations

作　　者：钟立超 黄文潮 蒙强 徐前卫[4] Zhong Lichao;Huang Wenchao;Meng Qiang;Xu Qianwei(Guangxi Real Estate Group Co.,Ltd.,Nanning Guangxi 530029,China;Construction Engineering Command Center of Guangxi Airport Management Group,Nanning Guangxi 530048,China;Guangxi Railway Investment Group Co.,Ltd.,Nanning Guangxi 530025,China;School of Transportation Engineering,Tongji University,Shanghai 201804,China)

机构地区：[1]广西地产集团有限公司,广西南宁530029 [2]广西机场管理集团建设工程指挥部,广西南宁530048 [3]广西铁路投资集团有限公司,广西南宁530025 [4]同济大学交通运输工程学院,上海201804

出　　处：《山西建筑》2025年第7期60-62,67,共4页Shanxi Architecture

摘　　要：基于南宁国际空港综合交通枢纽项目,对典型桩锚围护结构的实测数据进行了系统分析。通过时间序列分析方法,详细探讨了基坑开挖全过程中锚索轴力、围护桩顶水平位移及地表沉降的变化规律。结果表明,锚索在初期存在预应力损失现象,但在达到锁定拉力值后,其主动支护效果显著。桩顶水平位移受开挖深度影响,锚索的安装能够有效限制水平位移的增幅;地表沉降则表现为开挖深度和锚索安装影响的叠加效应,合理的桩锚体系能够在开挖阶段有效控制沉降。最后提出了在基坑开挖到底后加强监测和严格控制锚索预应力的施加过程的建议,以确保基坑支护结构的整体稳定和施工安全。This paper systematically analyzes measured data from a typical pile-anchor retaining structure at the Nanning International Airport Integrated Transportation Hub project.Using time series analysis,we investigate changes in anchor cable axial force,horizontal displacement at the top of retaining piles,and surface settlement throughout the excavation process.Results indicate an initial loss of prestress in anchor cables,with significant active support upon reaching the locking force value.Horizontal displacement of pile tops is highly sensitive to excavation depth,and anchor cable installation effectively limits this displacement.Surface settlement is influenced by both excavation depth and anchor cable installation,with a well-designed pile-anchor system effectively controlling settlement during excavation.We recommend enhanced monitoring and strict control of prestress application in anchor cables after reaching the final excavation depth to ensure overall stability and construction safety.

关 键 词：桩锚基坑 现场监测 时间序列 围护结构 锚索 

分 类 号：TU473.1[建筑科学—结构工程]