Ballast intelligent screening device based on particle morphology identification
A particle shape and screening device technology, applied in the field of railway engineering, can solve problems such as limitations, low measurement accuracy and efficiency, and inability to accurately reflect the geometric characteristics of ballast, so as to improve ballast screening efficiency and reduce labor costs. The effect of controllable labor intensity and ballast shape
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[0075] In order to carry out the indoor direct shear test of ballast particles, it is planned to screen a 50kg ballast sample for the test of the first-class crushed stone ballast of the new railway, and the ballast sample gradation, needle index, and flake index are required to meet the specification requirements .
[0076] "Railway Ballast Ballast" (TB / T 2140-2008) stipulates that the particle size distribution of the first-grade ballast ballast for new railways should meet the requirements in Table 1.
[0077] Table 1 Gravel size distribution of first-class gravel ballast for newly built railways
[0078]
[0079] In addition, "Railway Ballast" (TB / T 2140-2008) also stipulates the maximum content of needle index and flake index of ballast, requiring that the needle index of ballast should not exceed 20%, and the flake The index is not greater than 20%. Among them, the acicular index is defined as the mass percentage of particles whose length (maximum size) is greater t...
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