Research Article

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

Table 7

Numerical simulation procedures.

Procedure numberProcedure instructions

1Initial stress state: displacement clearing
2Construction of the shield tunnel, isolation piles, and diaphragm wall and displacement clearing
3Soil excavation to −2.0 m depth
4Construction of the first-layer anchor cable
5Soil excavation to −4.0 m depth
6Soil excavation to −6.0 m depth
7Construction of the second-layer anchor cable
8Soil excavation to −8.0 m depth
9Soil excavation to −10.0 m depth
10Construction of the third-layer anchor cable
11Soil excavation to −12.0 m depth
12Soil excavation to −14.0 m depth
13Soil excavation to −15.0 m depth
14Construction of basements of −4 and −3 stories
15Construction of basements of −2 and −1 stories
16Loading of the weights for the first and second stories
17Loading of the weights for the third and fourth stories
18Loading of the weights for the fifth and sixth stories
19Loading of the weights for the seventh and eighth stories
20Loading of the weights for the ninth and tenth stories