Research Article
Performance of Diaphragm Walls during Ultra-Deep Excavations in Karst Areas: Field Monitoring Analysis
Table 3
Schedule of construction phases of Zone 1–Zone 3.
| | Zones | Description | Start date (day from 2019/3/26) | End date (day from 2019/3/26) | Stage |
| | Zone 1 | Excavate to Level 1 (−5.0 m) | 2020/06/12 (Day 444) | 2020/07/02 (Day 464) | Stage 1 | | Construct 1st strut | 2020/07/07 (Day 469) | 2021/01/09 (Day 655) | Stage 2 | | Excavate to Level 2 (−10.0 m) | 2021/01/15 (Day 661) | 2021/03/16 (Day 721) | Stage 3 | | Construct 2nd strut | 2021/03/24 (Day 729) | 2021/04/10 (Day 746) | Stage 4 | | Excavate to Level 3 (−15.9 m) | 2021/04/13 (Day 749) | 2021/06/30 (Day 827) | Stage 5 | | Finish the base plate | 2021/07/01 (Day 828) | 2022/05/08 (Day 1,139) | Stage 6 |
| | Zone 2 | Excavate to Level 1 (−5.0 m) | 2020/06/12 (Day 444) | 2020/07/02 (Day 464) | Stage 1 | | Construct 1st strut | 2020/07/07 (Day 469) | 2021/01/09 (Day 655) | Stage 2 | | Excavate to Level 2 (−10.0 m) | 2021/01/21 (Day 667) | 2021/02/26 (Day 703) | Stage 3 | | Construct 2nd strut | 2021/02/28 (Day 705) | 2021/03/19 (Day 724) | Stage 4 | | Excavate to Level 3 (−16.5 m) | 2021/03/28 (Day 733) | 2021/04/13 (Day 749) | Stage 5 | | Construct 3rd strut | 2021/04/20 (Day 756) | 2021/07/15 (Day 842) | Stage 6 | | Excavate to Level 4 (−24.56 m) | 2021/07/24 (Day 851) | 2022/02/11 (Day 1,053) | Stage 7 |
| | Zone 3 | Excavate to Level 1 (−5.0 m) | 2020/06/12 (Day 444) | 2020/07/02 (Day 464) | Stage 1 | | Construct 1st strut | 2020/07/07 (Day 469) | 2020/11/20 (Day 605) | Stage 2 | | Excavate to Level 2 (−10.0 m) | 2020/12/04 (Day 619) | 2020/12/09 (Day 624) | Stage 3 | | Construct 2nd strut | 2020/12/10 (Day 625) | 2020/12/18 (Day633) | Stage 4 | | Excavate to Level 3 (−16.5 m) | 2020/12/20 (Day 635) | 2021/01/10 (Day 656) | Stage 5 | | Construct 3rd strut | 2021/01/13 (Day 659) | 2021/02/02 (Day 679) | Stage 6 | | Excavate to Level 4 (−20.45 m) | 2021/03/16 (Day 721) | 2021/04/22 (Day 758) | Stage 7 | | Construct 4th strut | 2021/07/18 (Day 845) | 2021/09/02 (Day 891) | Stage 8 | | Excavate to Level 5 (−34.68 m) | 2021/11/01 (Day 951) | 2022/05/08 (Day 1,139) | Stage 9 |
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