Table 3 Vertical settlements of heritage buildings under different excavation design schemes.
Design Schemes | Foundation Support System | Value |
|---|---|---|
Two-story-basement H = 10.3 m | Row piles + Horizontal Bracing (Two-Tier) (Cross bracing + corner bracing; the row piles consist of long spiral drilling grouted piles, with a diameter of 1000 mm, spacing of 1400 mm, and length of 27.5 m) | 4.89 mm |
One-story-basement H = 6.3 m | TRD Cement-Soil Cutoff Wall + H-Section Steel Beams + Horizontal Bracing (One-Tier) + Isolation Piles (H-Section Steel Beams @ 800 mm Spacing; Cement-Soil Cutoff Wall 900 mm Thick × 21.3 m Deep; H-Beam Specification H700 × 300 × 13 × 24, 22 m Length) | 5.50 mm |
TRD Cement-Soil Cutoff Wall + H-Section Steel Beams + Horizontal Bracing (One-Tier) (H-Section Steel Beams at 600 mm Spacing (Without Isolation Piles)) | 4.71 mm | |
TRD Cement-Soil Cutoff Wall + H-Section Steel Beams + Horizontal Bracing (One-Tier) + alternate bay excavation (H-shaped steel spacing: 800 mm) | 2.43 mm |
