大直径钢管桩打桩过程中桩周土强度弱化分析  

Strength Weakening Analysis of Soil Around Large Diameter Steel Pipe Pile During Piling

作　　者：罗泽林 LUO Ze-lin(Zhejiang Provincal Erjian Construction Group Ltd.,Ningbo 315000,China)

机构地区：[1]浙江省二建建设集团有限公司,浙江宁波315000

出　　处：《工程建设与设计》2023年第18期29-31,共3页Construction & Design for Engineering

摘　　要：基于大直径钢管桩打桩期间桩体附近土体强度弱化展开分析,通过对黏土与砂土进行环剪试验与压力测试,重点分析土层强度、剪切速率与正应力之间的关系,由此确定桩周土体强度折减因子算法,解决了大直径钢管桩施工中土层结构不稳定、施工安全风险较高的问题。结果表明,土体强度弱化程度与土壤性质、土层深度关系密切,研究结果可应用在打桩施工质量控制中。Based on the analysis of the strength weakening of the soil near the pile during the construction of large diameter steel pipe pile,the relationship between soil layer strength,shear rate and normal stress is analyzed through the ring shear test and pressure test of clay and sand,and the reduction factor algorithm of soil strength around the pile is determined,which solves the problem of unstable soil layer structure and high construction safety risk in the construction of large diameter steel pipe pile.The results show that the degree of soil strength weakening is closely related to soil properties and soil depth,and the research results can be applied to the quality control of piling construction.

关 键 词：桩周土体 强度弱化 打桩施工 大直径钢管 

分 类 号：TU473.12[建筑科学—结构工程]