Reinforcement Effects of Isolation Piles on the Adjacent Existing Tunnel in Building Construction

Table 10

Reinforcement effects of isolation piles on torsional deformation of the tunnel structure under different isolation pile bottom depths.

Isolation pile bottom depth	β after foundation pit excavation (%)	β after building loading (%)
1.7H	17.70	21.11
1.8H	22.46	27.24
1.9H	25.47	29.79
2H	27.68	32.18
2.1H	29.39	33.78