An Improved High-Intelligence Method of Gas and Oil Pipeline Prewarning System in Real Soil Environment

Table 1

The empirical values of two physical parameters of different soil types.

Physical parameters	Gravel soil	Sand	Cohesive soil	Sand clay
G	54–65	31–42	16–59	18–39
μ	0.20	0.20–0.25	0.25–0.35	0.25–0.3