Computer-Aided Analysis of Small Clear Space Intersection Tunnel and Heavy Load Railway Surrounding Rock Structure Dynamic Response Characteristics Analysis under Intelligent Manufacturing

Table 1

Surrounding rock material.

Category	Soil name	Classification standard	Particle size (mm)	Specification
Gravel soil	Boulder soil/rock soil/pebble soil	Gradation of soil particles	>200/20/2	50%
Sandy soil	Gravel/coarse sand/nakasago/fine sand	Gradation of soil particles	>0.5/0.25/0.075	50%/85%
Silt	Silt	—	>0.075	Plasticity index ≤10
Clay soil	Silty clay/clay	Plasticity index	10 < Ip ≤ 17