哈尔滨地区锤击PHC管桩竖向承载力研究  

RESEARCH ON THE VERTICAL BEARING CAPACITY OF PHC PIPE PILES UNDER HAMMER IMPACT IN HARBIN AREAS

作　　者：李超[1] 张辰熙[1] 陈伟[1] LI Chao;ZHANG Chenxi;CHEN Wei(Heilongjiang Province Academy of Cold Area Building Research,Harbin 150080,China)

机构地区：[1]黑龙江省寒地建筑科学研究院,哈尔滨150080

出　　处：《低温建筑技术》2023年第8期155-158,共4页Low Temperature Architecture Technology

摘　　要：文中通过对哈尔滨松花江漫滩区以中密-密实粗砂为持力层、采用锤击成桩工艺的PHC管桩承载力实测值普遍高于规范计算值的原因进行分析,利用置于中密-密实粗砂层上锤击施工的PHC管桩静载荷试验、高应变等测试成果,研究了PHC管桩单桩极限承载力、桩侧阻力及桩端阻力的大小、分布规律及各自的贡献比例,通过数据总结得到了砂土地区锤击施工PHC管桩极限端阻力提高系数,为哈尔滨地区PHC管桩单桩极限承载力的确定和研究提供了参考。From the data from vertical load tests on single prestressed high-strength concrete(PHC) pile in the medium-dense to dense coarse sand bearing layers in the Harbin area,the measured bearing capacity of PHC piles generally higher than the calculated values according to specifications.An analysis is conducted on the medium-dense to dense coarse sand bearing layer using the hammer driving method.Through static load tests,high-strain tests,and other test results obtained from the PHC pile constructions,the study investigates the magnitude,distribution patterns,and respective contributions of ultimate bearing capacity,side friction,and end bearing resistance of single piles.By summarizing the data,the study determines the coefficient for improving the ultimate end bearing resistance of PHC pile single piles driven by a hammer in sandy soil areas.

关 键 词：中密-密实粗砂持力层 锤击施工PHC管桩 端阻力提高系数 单桩极限承载力 

分 类 号：TU473.1[建筑科学—结构工程]