土中自由场应力与结构表面压力测量的差异

The difference between measurements of stress in soil and pressure on wall-surface

摘要: 在土木工程试验测量中,往往把土中自由场应力传感器与结构表面压力传感器不加区分,互相代用。本文给出了这两类情况下传感器匹配误差的定量计算公式,详细阐明了两类传感器在设计原则、测量误差计算方法、误差范围、应力场分布状态和扰动范围等方面的差异,以期克服土中应力和压力测量的盲目性。

Abstract: Usually the transducers are indiscriminately used to measure stress in soil and pressure on wallsurface in civil engineering test. The formulae of matcherror in these two circumstances are derived and the differences in design principles, computing methods and ranges of error, stress field and disturbed zone of these two kinds of transducer are expounded in this paper.The purpose is to avoid the incorrect use of transducers in measurement of stress in soil and pressure on wallsurface.