## 5 Influence of Construction Sequence
### Influence on Lateral Wall Deflection
It can be seen from Figure 8e,f that the lateral deflection curves of the diaphragm wall at B-5 and B-6 are almost coincident in the six scenarios, indicating that the construction sequence has little impact on the final lateral displacement values at B-5 and B-6. Figure 7: Lateral deflection of diaphragm wall with six different scenarios. Figure 8: Lateral deflection curves under six different scenarios. It can be seen from Figure 8g,h that the maximum lateral displacement of the diaphragm walls at D-7 is smallest in Scenarios 1, 3, and 4, at about 74 mm, and largest in Scenarios 2, 5, and 6, at about 76 mm, increasing by 2.7%. Therefore, the maximum lateral displacement at D-7 is mainly related to the excavation process of Pit C. When Pit C is excavated first, the soil mass outside Pit D will move toward the pit, causing greater displacement of the diaphragm wall in later excavation in Pit D. Nevertheless, the maximum lateral displacement of the diaphragm wall at D-8 is almost the same in the six scenarios. Since it is far away from other pits, the excavation of other pits has almost no coupling effect on the deformation of the diaphragm wall at D-8. It can be seen from Figure 8i,j that the maximum lateral displacement of the diaphragm wall at E-9 is about 69 mm in Scenarios 1, 2, and 3, and the maximum lateral displacement is 70.6 mm in Scenario 6, increasing by 2.3%. Thus, the excavation of Pit A before Pit E will help control the lateral displacement of the diaphragm wall at E-9. The maximum lateral displacement of the diaphragm wall at E-10 is about 21.5 mm in Scenarios 5 and 6 and about 23.8 mm in Scenarios 1 and 3, with a difference of 10.7%. Therefore, the maximum lateral displacement at E-10 is mainly related to the excavation process of Pit E. When Pit E is excavated in Stage 1, the maximum lateral displacement at E-10 will be the minimum, and vice versa. It can be seen from Figure 8i,j that the maximum lateral displacement of the diaphragm wall at E-9 is about 69 mm in Scenarios 1, 2, and 3, and the maximum lateral displacement is 70.6 mm in Scenario 6, increasing by 2.3%. Thus, the excavation of Pit A before Pit E will help control the lateral displacement of the diaphragm wall at E-9. The maximum lateral displacement of the diaphragm wall at E-10 is about 21.5 mm in Scenario 5 and 6 and about 23.8 mm in Scenarios 1 and 3, with a difference of 10.7%. Therefore, the maximum lateral displacement at E-10 is mainly related to the excavation process of Pit E. When Pit E is excavated in Stage 1, the maximum lateral displacement at E-10 will be the minimum. The maximum lateral displacement at E-10 will be the maximum if Pit E is excavated in Stage 3. In general, different excavation sequences have distinct coupling effects on the lateral deformation of the diaphragm walls at A-1, A-2, C-4, and E-10, have ordinary coupling effects on C-3, D-7, and E-9, and have almost no coupling effects at B-5, B-6, and D-8. It can be considered that the excavation sequence has diverse influences on the lateral deflection of the diaphragm wall. Unfortunately, it seems difficult to select the optimal construction sequence for controlling the deformation of the diaphragm wall.