静压PHC桩荷载传递的试验研究  

Research On Static Load Transfer Test of Injection Installed PHC Piles

作　　者：许国平[1] 

机构地区：[1]福建省建筑科学研究院,福州350025

出　　处：《建筑结构》2005年第7期32-36,共5页Building Structure

摘　　要：完成了10根PHC桩的足尺静载试验。试验结果表明,静压PHC桩在不同地质条件下承载性状可以表现为端承摩擦桩,也可以为摩擦端承桩;桩周淤泥、淤泥质粘土、粉土、粉质粘土、砂质粘土、残积砂砾质粘土等在桩侧阻力发挥到极限后均出现明显的应变软化现象;静压PHC桩充分发挥桩端阻力所需的桩端沉降约为桩端直径的5%～10%;静压法比其他施工方法的桩侧阻力和桩端阻力取值有明显提高。设计中应根据实测的土层阻力和位移关系选用荷载传递函数和设计参数。Ten PHC piles in actual engineering were tested. The results show that the load transfer behaviors of injection installed PHC piles are different in different soils; the stress of soils around piles decrease with the increasing of displacement after the peak value of shaft resistance; the end resistance of injection installed PHC piles can reach the peak value when the settlement of pile end reaches 5 % -10 % of the pile diameter; the shaft and end resistances of injection construction method are higher than those of the others. Based on the resistance-displacement relationship of test, the load transfer behavior function and design parameters of injection installed PHC piles are chosen.

关 键 词：静压PHC桩 荷载传递 静载试验 桩端沉降 静压法 

分 类 号：TU413.4[建筑科学—岩土工程]