Optimization Design and Application of Underground Reinforced Concrete Bifurcation Pipe

Table 3

Comparison of initial shape and optimization shape.

Variable	Before optimization	After optimization
Bifurcation angle (°)	60	47.86
Half angle of main cone (°)	3.2	4.65
Half angle of branch cone (°)	3.2	4.57
Main cone wall thickness (m)	0.6	0.57
Branch cone wall thickness (m)	0.8	0.63
Branch cone wall thickness (m)	0.8	0.63