水泥粉煤灰碎石桩复合地基抗震承载力调整系数取值的探讨  

A DISCUSSION ON THE ADJUSTMENT FACTOR OF SEISMIC BEARING CAPACITY FOR CFG-PILE COMPOSITE FOUNDATION

作　　者：党昱敬[1] DANG Yujing(Central Research Institute of Building and Construction,MCC Group,Beijing 100088,China)

机构地区：[1]中冶建筑研究总院有限公司,北京100088

出　　处：《工业建筑》2020年第11期97-101,共5页Industrial Construction

摘　　要：在地震设防区采用水泥粉煤灰碎石桩(CFG桩)进行地基加固时,需对CFG桩复合地基基础进行抗震验算。鉴于目前相关设计标准中没有CFG桩复合地基抗震承载力调整系数的具体规定,通过对现有设计标准中计算理论的梳理和分析,归纳了不同的CFG桩复合地基抗震承载力调整系数取值方法。分析比较发现,在CFG桩复合地基基础设计计算中,抗震承载力调整系数ζ_a~'取1.3较为合理。In seismic fortification zones,foundation strengthened by CFG piles needs to be checked for seismic resistance. In view of the fact that there was no specific provisions on adjustment coefficients of seismic bearing capacity for CFG-pile composite foundation in relevant regulations and codes,the paper concluded different methods to determine adjustment coefficients of seismic bearing capacity for CFG-pile composite foundation by combining and analyzing the design and calculation theory of existing regulations and specifications. Through comparative analysis,it was found that in the design and calculation of CFG-pile composite foundation,the adjustment factor ζa’ of seismic bearing capacity for CFG-pile composite foundation was 1. 3,which was more reasonable.

关 键 词：CFG桩复合地基 抗震承载力 调整系数 

分 类 号：TU470[建筑科学—结构工程]