题目内容

高应变测桩时,常用桩身完整性系数β值判别桩身质量,这里β的物理意义是()

A. 传感器安装截面与被测截面的面积比
B. 上部完整截面与被测截面阻抗比
C. 被测截面与上部完整截面的阻抗比
D. 被测截面与桩顶截面的阻抗比

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