深基坑嵌岩地下连续墙弯矩计算及风险评估研究  

Research on Bending Moment Calculation and Risk Assessment of Rock-socketed Diaphragm Wall in Deep Excavations

作　　者：陈锋[1] 谌艳 李衍航 潘伟强 颜枫 王雄[4] CHEN Feng;CHEN Yan;LI Yanhang;PAN Weiqiang;YAN Feng;WANG Xiong(Bureau of Public Works of Shenzhen Municipality,Shenzhen 518034,China;Shenzhen Building Safety and Construction Quality Testing and Appraisal Center,Shenzhen 518000,China;Shanghai Tunnel Engineering Co.,Ltd.,Shanghai 200030,China;Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]深圳市建筑工务署文体和水务工程管理中心,深圳518034 [2]深圳市房屋安全和工程质量检测鉴定中心,深圳518000 [3]上海隧道工程有限公司,上海200030 [4]上海交通大学,上海200240

出　　处：《广东土木与建筑》2024年第5期77-80,共4页Guangdong Architecture Civil Engineering

摘　　要：深基坑嵌岩地下连续墙弯矩承载能力是评估工程风险的重要指标,现有基于监测数据的计算方法无法定量分析上软下硬复杂地质条件下围护墙弯矩特性。文章提出了一种基于弹性地基梁力学模型与监测数据融合的方法,开展了深圳某基坑施工过程嵌岩围护墙弯矩计算与风险评估研究,结果显示围护墙最大测斜变形、嵌岩处弯矩和安全余量分别为67mm、2080kN·m和0.44,可作为基坑嵌岩围护墙断裂风险判别准则,为工程安全施工提供指导意义。The Bending Moment(BM)bearing capacity of diaphragm walls is a vital index for evaluating engineering risks in deep exca‐vation projects.The existing calculation methods based on monitoring data are unable to quantitatively analyze the BM characteristics of re‐taining walls under complex geological conditions with soft upper layers and hard lower layers.This paper introduces a dual-driven model,amalgamating the Beam-Spring mechanical model with monitoring data,to conduct BM calculation and risk assessment for rock-socketed dia‐phragm walls in a Shenzhen foundation pit.The results indicate that the maximum wall deflection,BM at the rock-socketed point,and safe‐ty margin are 67 mm,2080 kN·m,and 0.44.It can serve as criteria for assessing the fracture risk of the rock-socketed diaphragm wall,thereby providing significant guidance for ensuring safe construction practices.

关 键 词：地下连续墙 弯矩 监测数据 弹性地基梁 风险评估 

分 类 号：TU714[建筑科学—建筑技术科学]