Side-by-side method refers to the supervision activities in which supervisors monitor the construction quality and safety of key parts and key processes throughout the process of shield construction supervision. Each resident supervision department shall preliminarily determine the key parts and key working procedures of shield engineering according to the relevant contents of the Measures for Supervision and Management of Construction Projects. According to the characteristics of shield engineering, it is suggested to set up the following side stations: 1, entity core-pulling detection before departure and arrival; 2, before departure and arrival David reinforced broken, tunneling; 3. Important tool changing operations: including standby before each warehouse opening (including operation under pressure); 4. Assemble and cut the connecting passage section, and pour the concrete of the hole and the connecting passage; 5. The first tunnel plugging construction model; 6, important pay-off measurement 7, segment concrete pouring, etc.