渭河一级阶地密实中砂层承载力及变形特性研究  

Bearing Capacity and Deformation Characteristics of Dense Medium Sand Layer of Weihe First-order Terrace

作　　者：王富辉 徐张建 王永刚 孙伟 赵治海 燕建龙 Wang Fuhui;Xu Zhangjian;Wang Yonggang;Sun Wei;Zhao Zhihai;Yan Jianlong(Northwest Research Institute of Engineering Investigations and Design,Xi’an 710003,Shaanxi,China)

机构地区：[1]西北综合勘察设计研究院,陕西西安710003

出　　处：《岩土工程技术》2024年第5期566-571,共6页Geotechnical Engineering Technique

摘　　要：依托西安市渭河一级阶地某工程项目,通过现场试验及数值模拟对渭河一级阶地密实砂层地基进行承载力及变形特性研究,确定类似场地是否可采用天然地基建设近百米高层建筑。研究结果表明:渭河一级阶地密实中砂层的载荷试验P-s曲线呈缓变型,地基承载力特征值可取600kPa,变形模量可取40MPa;对渭河一级阶地类似工程进行分层总和法地基沉降计算时经验系数ΨS可取0.2;当地质条件类似时,建设近百米高层建筑采用天然地基是可行的。此研究结果可为西安渭河一级阶地高层建筑采用天然地基方案提供参考,亦可为类似场地进行变形计算提供经验参数。Based on a project in the Weihe first-order terrace in Xi'an,the bearing capacity and deformation characteristics of the dense sand layer foundation were studied through field tests and numerical simulations to determine whether natural foundations for high-rise buildings of nearly 100 meters can be built in similar sites.The results show that:the P-s curve of the load test of the dense sand layer in the Weihe first-order terrace is gently variable,the characteristic value of the bearing capacity of the foundation can be 600 kPa,and the deformation modulus can be 40 MPa.The empirical coefficientΨS can be taken as 0.2 for the calculation of foundation settlement by the sum-of-layers method for similar projects in the Weihe first-order terrace.When the geological conditions are similar,it is feasible to use natural foundations for the construction of high-rise buildings of nearly 100 meters.The results can provide a reference for the adoption of natural foundations for high-rise buildings on the Weihe first-order terrace,and also provide empirical parameters for deformation calculations on similar sites.

关 键 词：渭河一级阶地 密实中砂 天然地基 地基承载力 变形模量 

分 类 号：TU471[建筑科学—结构工程]