Research Article
Effect Analysis of Steel Sheet Pile Supporting for Utility Tunnel Foundation Pit in Water-Rich Soft Soil
Table 2
The monitoring evaluation requirements for foundation pit support [
27].
| | No. | Monitoring items | Change rate of warning value (mm/d) | Early warning of cumulative value (mm) | Monitoring frequency (1/d) |
| | 1 | Horizontal displacement of the support structure at the top | 4 | 40 or 0.5% H | 1 |
| | 2 | Vertical displacement of the support structure at the top | 3 | 30 or 0.5% H | 1 |
| | 3 | Displacement of the deep soil outside the foundation pit | 5 | 60 or 0.6% H | 1 |
| | 4 | Water table outside the foundation pit | 500 | 1,000 | 1 |
| | 5 | The axial force of the support structure | Warning value (kN) | 1 | | 750 |
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