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

Table 5

Procedures of the model test.

Procedure number	Procedure instructions
1	Initial state (construction of the diaphragm wall, isolation piles, anchor cable, and shield tunnel and reading initial values)
2	Soil excavation to −133 mm depth
3	Construction of sloping and the first-layer anchor cable
4	Soil excavation to −266 mm depth
5	Soil excavation to −400 mm depth
6	Construction of the second-layer anchor cable
7	Soil excavation to −533 mm depth
8	Soil excavation to −667 mm depth
9	Construction of the third-layer anchor cable
10	Soil excavation to −800 mm depth
11	Soil excavation to −933 mm depth
12	Soil excavation to −1000 mm depth
13	Waiting for 24 h after completion of excavation
14	Loading foundation slab and weights of 1.2 kN
15	Loading weights of 2.4 kN
16	Loading weights of 3.6 kN
17	Loading weights of 4.8 kN
18	Loading weights of 6.0 kN
19	Loading weights of 7.2 kN
20	Loading weights of 8.4 kN