Research Article
Performance of Diaphragm Walls during Ultra-Deep Excavations in Karst Areas: Field Monitoring Analysis
Table 4
Schedule of construction phases of Zone 4 and Zone 5.
| | Zones | Description | Start date (day from 2019/3/26) | End date (day from 2019/3/26) |
| | Zone 4 | Excavate to Level 1 (−5.0 m) | 2020/06/12 (Day 444) | 2020/07/02 (Day 464) | | Construct 1st strut | 2020/07/07 (Day 469) | 2020/08/31 (Day 524) | | Excavate to Level 2 (−10.0 m) | 2020/09/25 (Day 549) | 2020/10/30 (Day 584) | | Construct 2nd strut | 2020/11/12 (Day 597) | 2021/02/06 (Day 683) | | Excavate to Level 3 (−16.5 m) | 2021/02/20 (Day 697) | 2021/04/05 (Day 741) | | Construct 3rd strut | 2021/04/13 (Day 749) | 2021/06/16 (Day 813) | | Excavate to Level 4 (−20.45 m) | 2021/07/12 (Day 839) | 2021/07/21 (Day 848) | | Construct 4th strut | 2021/07/24 (Day 851) | 2021/08/15 (Day 873) | | Excavate to Level 5 (−26.45 m) | 2021/08/24 (Day 882) | 2021/09/16 (Day 905) | | Construct 5th strut | 2021/09/21 (Day 910) | 2021/12/06 (Day 986) | | Excavate to Level 6 (−34.68 m) | 2021/12/29 (Day 1,009) | 2022/05/08 (Day 1,139) |
| | Zone 5 | Construct 1st strut | 2020/07/07 (Day 469) | 2020/07/15 (Day 477) | | Excavate to Level 1 (−6.85 m) | 2020/07/22 (Day 484) | 2020/07/28 (Day 490) | | Construct 2nd strut | 2020/08/04 (Day 497) | 2020/10/05 (Day 559) | | Excavate to Level 2 (−13.15 m) | 2020/10/13 (Day 567) | 2020/10/27 (Day 581) | | Construct 3rd strut | 2020/11/12 (Day 597) | 2020/12/04 (Day 619) | | Excavate to Level 3 (−20.45 m) | 2020/12/14 (Day 629) | 2021/01/02 (Day 648) | | Construct 4th strut | 2021/01/05 (Day 651) | 2021/02/03 (Day 680) | | Excavate to Level 4 (−26.45 m) | 2021/02/12 (Day 689) | 2021/04/05 (Day 741) | | Construct 5th strut | 2021/04/13 (Day 749) | 2021/05/09 (Day 775) | | Excavate to Level 5 (−35.18 m) | 2021/05/17 (Day 783) | 2021/07/26 (Day 853) |
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