| | Job content | Start time | Execution time |
| | Tunnel engineering | Tunnel portal reinforcement | July 10, 2018 | November 1, 2018 | | Construction of 1# tunnel open cut section | October 20, 2018 | May 17, 2019 | | Tunnel body excavation and initial support of ramp A tunnel and right tunnel entrance of 1# tunnel (single tunnel length 1174.585 linear meters) | September 8, 2018 | December 16, 2019 | | The second lining, waterproof and drainage, and concrete pavement of ramp A tunnel and right hole entrance of 1# tunnel (single tunnel length 1174.585 linear meters) | November 8, 2018 | March 31, 2020 | | Tunnel body excavation and initial support of ramp B tunnel and left tunnel entrance of 1# tunnel (single tunnel length 1212 linear meters) | October 5, 2018 | December 11, 2019 | | The second lining, waterproof and drainage, and concrete pavement of ramp B tunnel and left hole entrance of 1# tunnel (single tunnel length 1212 linear meters) | December 5, 2018 | March 31, 2020 | | Excavation and initial support at the outlet of the right tunnel of 1# tunnel (single tunnel length 1232 linear meters) | November 16, 2018 | December 9, 2019 | | The secondary lining, waterproof and drainage, and concrete pavement at the outlet of the right tunnel of 1# tunnel (single tunnel length 1232 linear meters) | September 16, 2018 | March 31, 2020 | | Excavation and initial support at the outlet of the left tunnel of 1# tunnel (single tunnel length 1265 linear meters) | September 25, 2018 | December 20, 2019 | | The second lining, waterproof and drainage, and concrete pavement at the outlet of the left tunnel of 1# tunnel (single tunnel length 1265 meters) | November 25, 2018 | March 31, 2020 | | Excavation and initial support of right entrance of 2# tunnel (single tunnel length 1185 linear meters) | September 12, 2018 | October 28, 2019 | | The second lining, waterproof and drainage, and concrete pavement at the entrance of the right tunnel of 2# tunnel (single tunnel length 1185 meters) | November 12, 2018 | March 31, 2020 | | Excavation and initial support of left entrance of 2# tunnel (single tunnel length 1155 linear meters) | September 20, 2018 | September 6, 2019 | | The second lining, waterproof and drainage, and concrete pavement at the entrance of the left tunnel of 2# tunnel (single tunnel length 1155 meters) | November 20, 2018 | March 31, 2020 | | Excavation and initial support at the outlet of the right tunnel of 2# tunnel (single tunnel length 1036 linear meters) | November 1, 2018 | October 3, 2019 | | The secondary lining, waterproof and drainage, and concrete pavement at the outlet of the right tunnel of 2# tunnel (single tunnel length 1036 linear meters) | January 1, 2019 | March 31, 2020 | | Excavation and initial support at the outlet of the left tunnel of 2# tunnel (single tunnel length 1085.451 linear meters) | October 25, 2018 | December 1, 2019 | | The secondary lining, waterproof and drainage, and concrete pavement at the outlet of the left tunnel of 2# tunnel (single tunnel length 1085.451 linear meters) | December 25, 2018 | March 31, 2020 |
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