土层厚度分布不均时基坑剖面的近似等效计算  

An approximate equivalent calculation of excavations bisect when the thickness distribution of soil layer is uneven

作　　者：张森 Zhang Sen(Guangzhou Municipal Engineering Design and Research Institute Co.,Ltd.,Guangzhou Guangdong 510060,China)

机构地区：[1]广州市市政工程设计研究总院有限公司,广东广州510060

出　　处：《山西建筑》2024年第13期120-123,131,共5页Shanxi Architecture

摘　　要：以广州市某地埋式污水处理厂锚拉式基坑支护设计为例,巧妙利用理正深基坑支护设计软件坑内加固土功能,通过人为调整基坑底部被动区土层宽度、厚度、内摩擦角、黏聚力等参数,在锚拉式支挡结构支护单元剖面计算中近似等效体现预应力锚索长度范围内各勘察孔揭示的土层厚度分布不均的影响,尽量减少常规设计中采用最不利勘察孔揭示的土层厚度进行建模计算导致的围护结构嵌固深度等工程量失真,可供类似基坑工程支护设计参考借鉴。Taking the anchored retaining structure retaining and protection for excavations design of a buried sewage treatment plant in Guangzhou as an example,this paper cleverly utilizes the soil reinforcement function of the Lizheng deep foundation pit support design software.By manually adjusting parameters such as the width,thickness,internal friction angle,and cohesion of the passive zone soil layer at the bottom of the foundation pit,the uneven distribution of soil layer thickness revealed by each survey hole within the length range of the prestressed anchor cable is approximately equivalent in the calculation of the single element profile of the support,minimize the distortion of engineering quantity caused by modeling and calculating the thickness of each soil layer using the most unfavorable survey holes in conventional design,which can be used as a reference for similar foundation pit support design.

关 键 词：锚拉式支挡结构 支护单元剖面计算 土层厚度分布不均 坑内加固土 

分 类 号：TU471.4[建筑科学—结构工程]