软土地区分隔型基坑群变形特性及坑外土体沉降变化规律研究  

Study on Deformation Characteristics of Separate Foundation Pit Group in Soft Soil Area and the Variation of Soil Settlement Outside the Pit

作　　者：郑澄 Zheng Cheng(Jiangxi Brigade of China Building Materials Industry Geological Exploration Center,Shangrao,Jiangxi 334000)

机构地区：[1]中国建筑材料工业地质勘查中心江西总队,江西上饶334000

出　　处：《江西建材》2024年第11期238-240,共3页

摘　　要：为分析分隔型基坑群变形及力学特性,文中以某高层建筑基坑工程为例,通过数值模拟方法模拟分析分隔型基坑群的围护结构变形、分隔墙变形以及坑外土体沉降变化规律。结果表明,A类区域地下墙围护结构最大侧向变形为0.15%;基坑外地表沉降量随着距坑外距离的增加而先增加后降低,E类位置基坑周边地表沉降量最低平均值为0.24%。分隔式基坑群的开挖方式可有效降低围护结构最大侧向变形及周边地表沉降量,提升软土地区大面积基坑工程施工质量。In order to analyze the deformation and mechanical characteristics of the separated foundation pit group,the paper takes a high-rise building foundation pit project as an example,and simulates the deformation of the envelope structure,the deformation of the separation wall and the soil settlement outside the pit by numerical simulation method.The results show that the maximum lateral deformation of the underground wall envelope in Class A area is 0.15%.The surface settlement outside the foundation pit increases first and then decreases with the increase of the distance from the pit,and the lowest average value of the surface settlement around the foundation pit in the E position is 0.24%.The excavation method of separated foundation pit group can effectively reduce the maximum lateral deformation of the envelope structure and the surrounding surface settlement,and can improve the construction quality of large-scale foundation pit in soft soil area.

关 键 词：软土地区 基坑群工程 数值模拟 变形特性 土体沉降 

分 类 号：TU195[建筑科学—建筑理论]