基于欧洲标准的水泥搅拌桩复合地基承载力研究  

Research on the Bearing Capacity of Cement Mixing Pile Composite Foundation Based on European Standard

作　　者：魏世好 WEI Shihao(China Civil Engineering Construction Corporation,Beijing 100038,China)

机构地区：[1]中国土木工程集团有限公司,北京100038

出　　处：《铁道建筑技术》2024年第5期72-75,103,共5页Railway Construction Technology

基　　金：中国土木工程集团有限公司科技研发计划项目(ZT-18B01)。

摘　　要：为了进一步提高中国海外项目质量,阐述了欧洲标准化委员会特殊岩土工程施工标准--深层搅拌法规范和Broms、FHWA复合地基承载力计算方法,对比分析了中国标准与欧洲标准复合地基承载力设计方法的异同。根据海外某工程的计算示例和对比分析,得到了不同复合地基承载力计算方法的结果及其规律。结果表明:不同计算方法由于其具体的数值依据不同的参数取值,故数值大小存在一定的差异,但规律变化一致;欧洲标准侧重土体不排水抗剪强度的取值、桩无侧限抗压强度的取值和桩土应力比的取值,在设计工作中应重视这几个数值的取值和原位测试结果。In order to further improve the quality of overseas projects of China,the special geotechnical engineering construction standard—deep mixing method specification of European Standardization Committee and Broms and FHWA composite foundation bearing capacity calculation method were elaborated,and the similarities and differences between the Chinese standard and the European standard composite foundation bearing capacity design methods were compared and analyzed.Based on a calculation example and comparative analysis of a certain overseas project,the results and rules of different composite foundation bearing capacity calculation methods were obtained.The results show that different calculation methods have certain differences in numerical values due to their specific parameter values,but the patterns of change are consistent.The European standard focuses on the values of undrained shear strength of soil,unconfined compressive strength of piles,and pile-soil stress ratio.Attention should be paid to the choice of these values and the results of in-situ testing in design work.

关 键 词：欧洲标准 水泥搅拌桩 复合地基 极限承载力 

分 类 号：TU473.11[建筑科学—结构工程]