Displacement Back Analysis for a High Slope of the Dagangshan Hydroelectric Power Station Based on BP Neural Network and Particle Swarm Optimization

Table 5

Comparison of back analysis values, BP values, and measured values.

Excavation step	Monitoring point	Increment displacement (mm)
		FLAC	BP	Measurement
Step 8	M^42RJC	0.869	0.820	0.820
	M^41RJC	0.943	0.870	0.870
Step 9	M^42RJC	1.456	1.240	1.350
	M^41RJC	1.775	1.511	1.370
	M^42RX	2.386	2.285	2.300
Step 10	M^42RJC	0.138	0.131	0.150
	M^41RJC	0.143	0.143	0.120
	M^42RX	−0.012	−0.010	−0.010
	M^41RX	−0.078	−0.100	−0.100