砾砂层桩端后注浆灌注桩承载性能试验研究  

Experimental study on bearing capacity of end post-grouting bored pile at gravel sand layer

作　　者：陈翠丽 殷开成 宋伟伟[3] 王旭 CHEN Cuili;YIN Kaicheng;SONG Weiwei;WANG Xu(Architecture Designing Institute Co.,Ltd.,Southeast University,Jiangsu Nanjing 210096 China;Nanjing Saibao Hydraulic Equipment Co.,Ltd.,Jiangsu Nanjing 211164 China;Jiangsu Jinghu Expressway Co.,Ltd.,Jiangsu Huaian 223005 China)

机构地区：[1]东南大学建筑设计研究院有限公司,江苏南京210096 [2]南京赛宝液压设备有限公司,江苏南京211164 [3]江苏京沪高速公路有限公司,江苏淮安223005

出　　处：《山东交通科技》2020年第5期25-28,共4页

摘　　要：为获得砾砂层桩端后注浆灌注桩的承载力,进行了试验桩的自平衡法静载试验,测得上、下段桩荷载-位移曲线,得到侧阻注浆增强系数和端阻注浆增强系数均大于《建筑桩基技术规范》(JGJ 94—2008)注浆增强系数的上限值但较为接近。表明按JGJ 94—2008进行桩端后注浆灌注桩设计,所得承载力是偏保守的。In order to obtain the bearing capacity of the end post-grouting bored pile at the gravel sand layer,the static load test of the self-balance method is carried out.The load-displacement curves of the upper and lower piles are measured.The grouting enhancement factor of the side resistance and the grouting enhancement factor of the end resistance are both greater than the upper limit value of the technical code for building pile foundations(JGJ 94—2008), but are relatively close. When designingaccording to JGJ 94—2008, the bearing capacity obtainedis relatively conservative.

关 键 词：灌注桩 后注浆 自平衡法 侧阻 端阻 增强系数 

分 类 号：TU473.1[建筑科学—结构工程]