软土地区冲孔灌注桩荷载传递特性  

Load transfer characteristics of punched cast-in-situ pile in soft soil area

作　　者：施峰[1,2] 林清意 章东[1,2] 梁曦[1,2] 

机构地区：[1]福建省建筑科学研究院,福州350025 [2]福建省绿色建筑技术重点实验室,福州350025

出　　处：《建筑结构》2014年第3期79-83,共5页Building Structure

摘　　要：介绍了软土地区平均长径比约为62且在桩顶、桩端和各土层分界面均埋设钢弦式钢筋计的12根冲孔灌注桩的静荷载试验结果。根据试验结果,分析了冲孔灌注桩的荷载传递的特性以及其极限侧阻力和极限端阻力的变化规律。讨论了冲孔灌注桩的施工工艺以及持力层性状、沉渣厚度、嵌岩深度、沉渣成分和桩端后注浆等桩端嵌固情况对其承载力的影响。The static load test results of 12 punched east-in-situ piles in soft soil area, which have average length-diameter ratio of 62 and steel-string transducer at pile tip, at the side of pile and at the interfaces of soil layer were introduced. According to the test results, the characteristics of load transfer and variation law of ultimate side resistance and ultimate top resistance were analyzed. The influences of construction technique, the embedded situation such as bearing strata, thickness of residue, socket length, sediment composition, pile tip post-grouting on bearing capacity of piles were discussed.

关 键 词：冲孔灌注桩 荷载传递 极限侧阻力 极限端阻力 桩端嵌固 

分 类 号：TU753.3[建筑科学—建筑技术科学]