Research Article

AHP-FSE-Based Risk Assessment and Mitigation for Slurry Balancing Shield Tunnel Construction

Table 9

Shield machine performance requirements.

Basic rulesPerformance requirements of shield machine

(1) Engineering geology(1) The size of shield machine must conform to the tunnel size.
(2) The cutters of shield tunneling must adapt to the harsh geological conditions

(2) Engineering environment(3) Shield machine has air pressure (or normal pressure) knife change conditions, and fully equipped.
(4) Equipped with machine to reinforce the working surface soil.

(3) Long distance across rivers and seas(5) The cutter head is equipped with a mixer, and pipe entrance is equipped with a crusher.
(6) The antideformation ability of shield tail should meet the construction requirements
(7) Shield assembly performance is efficient and matches with the general segment

(4) Large buried depth and high water pressure(8) The normal service life of cutter head bearing and sand seal system should meet the requirements.
(9) The sealing capacity of the soil and sand sealing system should meet the requirements.
(10) The sealing capacity of shield tail seal shall meet the requirements

(5) Synchronous construction requirements(11) Single liquid mortar is used for synchronous grouting, and the shield machine should have corresponding devices for grouting.
(12) Frame system needs to meet the requirements of shield equipment layout.