69results about How to "Control density" patented technology

The invention relates to a measuring fixture of a frozen soil dielectric constant, comprising a soil sampler, a soil roller and soil retaining components. The soil sampler is in a cylinder shape and provided with an internal cavity; both sides of the soil sampler are provided with openings; the middle part of the soil sampler is provided with external threads; measuring scales are arranged on thesoil sampler; the soil roller is in a cylinder shape and provided with an internal cavity; the middle part of the soil roller is provided with internal threads; the bottom of the soil roller is provided with a soil pressing block; the upper end surface of the soil roller is provided with scales; the soil roller is arranged outside the soil sampler rotatably; and the openings at both sides of the soil sampler are respectively provided with a soil retaining component. In the measuring fixture and the measuring method of the frozen soil dielectric constant, a probe is extended into a thermostated container to perform measurement, and soil samples and the probe are in close contact when the soil samples and the probe are not frozen, therefore, the measuring accuracy is high. Because both the soil sampler and the soil roller are provided with the scales, the volume weight of the measured soil samples can be accurately controlled, and the comparability of data measured for many times can beensured. Because the measuring fixture is adopted to perform measurement, the manual operation can be avoided, the conformity requirement of the measured soil samples on homogeneous isotropy can be ensured, and the measurement error can be reduced.