【摘要】 用低应变法检测嵌岩桩,若桩底出现明显同相反射,多数因桩底缺陷引起。而区分是桩还是持力层的缺陷,主要看反射的起跳时间在2L/C之前还是之后。当桩的变径及入岩反射对测试影响很大时,应进一步用钻芯法检验。更多还原

【Abstract】 Testing bearing pile with low strain method will be some defects in the bottom if the echo from the tip has the same phase as the pulse at the top. The defect is in the pile when the echo time ahead of the 2L/C, or in the bearing layer when the echo time behind the 2L/C. The core drilling method should be used to detect the pile further if the tip echo is affected in evidence by the reflected waves from the rock or cause by the section change of pile.更多还原