超长嵌岩桩的试验研究和承载力确定  

Experimental Study on Determination of Loading Bearing Capacity of the ELPER

作　　者：曹新明 杨志斌 潘刚华 金谦[3] 

机构地区：[1]南京市建筑设计研究院 [2]东南大学 [3]中国建筑科学研究院建筑装修研究部

出　　处：《建筑科学》1998年第5期27-30,共4页Building Science

摘　　要：本文通过对超长嵌岩桩的静载荷试验、大应变动测以及侧阻力、端阻力测试的结果分析，说明覆盖土层为软弱土的超长嵌岩桩的极限承载力，取决于桩发生弯曲失稳破坏时的临界荷载，而不是桩尖土塑性破坏时的极限荷载。另外，从桩侧阻力和端阻力的发挥情况、分布曲线和分配比例，阐述超长嵌岩桩端阻力不能充分发挥的原因是因为失稳破坏，并提出该桩型承载力的确定方法。In the paper the ultimate bearing capacity of the extra long pile embeded in rocks(ELPER) was investigated by the test of static load,moving load,lateral resistance and end resistance.The results show that the load bearing capacity of the ELPER depends mainly on the critical load of instable failure instead of the ultimate load capacity of the soil close to the pile point.The stress distributions and distribution coefficients of lateral and end resistances of the pile were analysed.It shows the reason why the end resistance can not be full employed is the instability of the pile.The method to determine the bearing capacity of ELPER is also presented in the paper.

关 键 词：超长嵌岩桩 极限承载力 侧阻力 桩端阻力 试验 

分 类 号：TU413.4[建筑科学—岩土工程] TU473.14[建筑科学—土工工程]