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

Table 2

Measured incremental displacement.

Excavation step	M^42RJC	M^41RJ	M^42RX	M^41RX
Step 8	0.82 mm	0.87 mm	—	—
Step 9	1.35 mm	1.37 mm	2.30 mm	—
Step 10	0.15 mm	0.12 mm	−0.01 mm	−0.10 mm