预应力混凝土管桩单桩承载力分析  

Analysis on the bearing capacity of single prestressed concrete pipe pile

作　　者：姜浩 耿可新 杨浩 芦衡崑 兰鹏伟 JIANG Hao;GENG Kexin;YANG Hao;LU Hengkun;LAN Pengwei(China Aerospace Construction Engineering Group Co.,Ltd.,fifth company,Beijing 100070,China)

机构地区：[1]中航天建设工程集团有限公司五公司,北京100070

出　　处：《建筑结构》2022年第S01期2759-2762,共4页Building Structure

摘　　要：预应力混凝土管桩单桩竖向极限荷载的经验计算公式较少,且不同类型地基土下单桩极限荷载差异性较大,合理准确的经验公式及参数可提高基础工程设计效率及施工质量。分析长沙市某工程试桩静载荷试验数据,得出单桩竖向屈服荷载与极限荷载的比值。基于既有标贯锤击数经验公式,提出适用于本工程地质条件的经验公式修正系数,并对比土体性能参数公式和标贯锤击数经验公式计算结果的精确度。It has few empirical formulas to make the calculation of the vertical ultimate load of single pile of prestressed concrete pipe pile.What’s more,it exists great differences in the ultimate load of single pile of different types of foundation soil.The design efficiency and construction quality of foundation engineering can be improved through the use of reasonable and accurate empirical formulas and parameters.According to the analysis of the static load test data of a test pile in Changsha City,it obtains the ratio of vertical yield load to ultimate load of a single pile.On the basis of the existing empirical formula of standard penetration number,it proposes an empirical formula correction coefficient suitable for the geological conditions of the project,which also compares the accuracy of the calculation results of soil performance parameter formula and empirical formula of standard penetration number.

关 键 词：预应力混凝土管桩 单桩竖向承载力 静载荷试验 

分 类 号：TU473.11[建筑科学—结构工程]