ISO 18674-3:2017规定了通过用于岩土监测的测斜仪测量一条线路上的位移。ISO 18674-1中介绍了地面、与地面相互作用的结构、岩土填料和岩土工程性能监测的一般规则。 ISO 18674-3:2017还提到了挠度计（见附录B），以补充用于测定水平测量线水平位移的测斜仪。 注:一般来说，有两个独立的位移分量作用于测量线。 测斜仪允许测定垂直测量线的两个分量。对于水平线，测斜仪仅限于测定垂直分量。 如果与ISO 18674-2结合使用，ISO 18674-3:2017允许测定任何方向上的位移。 ISO 18674-3:2017适用于: -检查与观测设计程序相关的岩土工程设计； -施工前、施工中和施工后岩土结构的监测（e。 g、 天然斜坡、边坡开挖、路堤、开挖墙、基础、大坝、垃圾场、隧道）； -推导岩土工程关键参数（例如，根据桩荷载试验或试挖隧道的结果）； -识别和监测地面上的活动剪切面。 注:ISO 18674-3:2017满足了根据参考文献[1]和[2]在岩土工程勘察和测试中通过测斜仪对地面、与地面相互作用的结构和岩土工程进行性能监测的要求。

ISO 18674-3:2017 specifies the measurement of displacements across a line by means of inclinometers carried out for geotechnical monitoring. General rules of performance monitoring of the ground, of structures interacting with the ground, of geotechnical fills and of geotechnical works are presented in ISO 18674？1. ISO 18674-3:2017 also refers to deflectometers (see Annex B) to supplement inclinometers for the determination of horizontal displacements across horizontal measuring lines. NOTE In general, there are two independent displacement components acting across measuring lines. Inclinometers allow the determination of the two components for vertical measuring lines. For horizontal lines, inclinometers are limited to the determination of the vertical component only. If applied in conjunction with ISO 18674？2, ISO 18674-3:2017 allows the determination of displacements acting in any direction. ISO 18674-3:2017 is applicable to: - checking geotechnical designs in connection with the Observational Design procedure; - monitoring of geotechnical structures prior to, during and after construction (e.g. natural slopes, slope cuts, embankments, excavation walls, foundations, dams, refuse dumps, tunnels); - deriving geotechnical key parameters (e.g. from results of pile load tests or trial tunnelling); - identification and monitoring of active shear planes in the ground. NOTE ISO 18674-3:2017 fulfils the requirements for the performance monitoring of the ground, of structures interacting with the ground and of geotechnical works by the means of inclinometers as part of the geotechnical investigation and testing in accordance with References [1] and [2].