软岩地基嵌岩灌注桩承载力自平衡测试研究

摘要

Self - balanced load test method is a new developped technology of static - load test of pile which is used to test the ultimate bearing capacity of heavy - loaded pile and the ultimate bearing capacity of the pile in the place where normal method is unsuitable. Take a rock - socketed cast - in - place pile of a certain bridge in Dongguang as an example, this paper introduced self- balanced load test method of testing the ultimate bearing capacity of the pile. The testing result show the deformation property of the pile with the continue increasing load and drags at the bottom of pile being continuing compressed.%桩承载力自平衡试验方法是大吨位承载力和困难地段桩基静载试验的一种新的检测技术.介绍了这种试验方法在东莞某桥梁大吨位软岩地基嵌岩灌注桩的静载测试,对试验成果进行了分析,研究了钻孔嵌岩灌注桩随着荷载加大、桩端沉碴持续压缩增强的受力变形特性.