3 results about "Apparent density" patented technology

This invention belongs to the field of building construction technology and discloses a method for determining the layered packing parameters of concrete. The method includes the following steps: obtaining the first friction coefficient μ of the bottom structural surface, the apparent density ρ of the concrete, and the known packing parameters of the concrete layer based on the building construction plan; and determining the packing parameters based on τ... y =ρgh(sinα-μcosα) yields the uncalculated packing parameters of the concrete layer; known packing parameters include the preset yield stress τ of the concrete layer. y The method for determining the concrete layer stacking parameters includes any two of the preset layer thickness h and preset inclination angle α of the concrete layer. The stacking parameters to be calculated include the preset yield stress, preset layer thickness, and preset inclination angle, excluding the two known stacking parameters. This method not only establishes the relationship between yield stress, inclination angle, and thickness, but also fully considers the influence of friction between the concrete and the underlying structure.

The invention discloses a method and a system for identifying a prospecting marker bed of a sandstone type uranium mine in a northern cretaceous system stratum of an Ordos basin, and relates to the technical field of geological exploration. Comprising the following steps: collecting geological data and geophysical logging data of a cretaceous system stratum in a target area, and determining a stratum section of a to-be-identified marker bed; the method comprises the following steps: on the basis of determining a stratum section of a to-be-identified marker bed, obtaining logging response characteristics of mudstone and calcareous sandstone, and establishing a marker bed identification model; and interpreting the logging curve by using the marker bed identification model, identifying mudstone and calcareous sandstone marker beds, and verifying the regional distribution stability. According to the method, through the combined response characteristics of the apparent resistivity, the apparent density and the natural potential, the mudstone layer and the calcareous sandstone layer are accurately distinguished, and the spatial positions of the mudstone layer and the calcareous sandstone layer are determined, so that the problems of low marker bed identification efficiency, dependence on manpower and poor regional adaptability in the prior art are solved.

The invention belongs to the technical field of building construction, and discloses a concrete layered stacking parameter determination method. The concrete layered stacking parameter determination method comprises the following steps: obtaining a first friction coefficient mu of a bottom structure surface, an apparent density rho of concrete and known stacking parameters of a concrete layer according to a building construction scheme; obtaining a to-be-calculated stacking parameter of the concrete layer according to tau y = rhogh (sin alpha-mu cos alpha); the known stacking parameters comprise any two of the preset yield stress tau y of the concrete layer, the preset layer thickness h of the concrete layer and the preset inclination angle alpha of the concrete layer, and the to-be-calculated stacking parameters comprise the other one of the preset yield stress, the preset layer thickness and the preset inclination angle except the two of the known stacking parameters. According to the method for determining the layered stacking parameters of the concrete, the relation between the yield stress and the inclination angle and the thickness is established, and the influence of friction force between the concrete and the bottom structure is fully considered.