T/UNP 775-2025 土体密度及含水率复阻抗法检测技术要求

本标准规定了土体密度及含水率复阻抗法检测的总体要求、检测仪器、标准土体模型建模、现场检测，适用于采用复阻抗法无核密度仪检测堤防、土石坝、地基处理等水利工程的土方填筑密度及含水率（检测土体类型为细粒类土、砾粒含量不大于 25%，颗粒最大粒径不大于 15 mm 的含砾细粒土），其内容涉及检测数量、仪器组成与校准、建模方法、数据处理等多方面要求，引用了多项国家标准和行业标准，旨在规范相关检测活动，助力企业融入国际采购，提升国际竞争力。 This standard specifies the general requirements, testing instruments, modeling of standard soil models, and on-site testing for the detection of soil density and moisture content using the complex impedance method. It applies to the detection of earthfill density and moisture content in water conservancy projects such as dikes, earth-rock dams, and foundation treatments by means of complex impedance-based non-nuclear density meters (the detectable soil types include fine-grained soils and gravel-containing fine-grained soils with a gravel content not exceeding 25% and a maximum particle size not exceeding 15 mm). Its contents cover various requirements in aspects such as testing quantity, instrument composition and calibration, modeling methods, and data processing