人为因素引起的抗震场地类别变化探讨

Discussion on the Change of Seismic Site Category Caused by Human Factors

建筑工程场地类别是岩土工程勘察需查清的一项重要内容,决定了抗震设计参数的选取,最终影响工程造价及工程质量。人为因素包括填方、挖方、地基处理等将改变原场地的覆盖层厚度、等效剪切波速等指标,进而改变建筑工程场地类别。以已完成的几个广东项目情况对该问题进行分析,发现人为因素包括填方、挖方、地基处理等将改变原场地的覆盖层厚度、等效剪切波速等指标,可能改变建筑工程场地类别,如不引起重视采取相关措施,将造成经济浪费或设计不足。

The type of architectural engineering site is an important content to be checked in geotechnical engineering investigation,which determines the selection of seismic design parameters,and ultimately affects the cost and quality of the project.Human factors,including filling,excavation and foundation treatment,will change the overburden thickness,equivalent shear wave velocity and other indicators of the original site,thus changing the category of construction engineering site.Based on the analysis of several completed projects in Guangdong,this paper found that human factors,including filling,excavation and foundation treatment,will change the overburden thickness,equivalent shear wave velocity and other indicators of the original site,which may change the type of construction site.If no attention is paid to relevant measures,it will cause economic waste or insufficient design.