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| Construction classification | Subitem | Risk sources | P | C | R |
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| Foundation pit construction WE01 A | Cast-in-place pile construction A | Large equipment overturning | 2 | 3 | 6 |
| Unqualified concrete and reinforcement materials | 2 | 2 | 4 |
| Positioning and setting out error | 3 | 2 | 6 |
| Pile hole defects | 3 | 3 | 9 |
| Unreasonable production and use | 3 | 2 | 6 |
| Reinforcement cage hoisting is not in place, construction collision | 4 | 2 | 8 |
| Encounter obstacles | 2 | 3 | 6 |
| Concrete pouring defects | 3 | 3 | 9 |
| Construction of high-pressure jet grouting pile B | Pile forming defects | 3 | 2 | 6 |
| The preparation of cement slurry does not meet the design requirements | 3 | 2 | 6 |
| Large equipment overturning | 2 | 3 | 6 |
| The embedded depth is not enough | 2 | 2 | 8 |
| Steel pipe pile construction C | Grouting is not timely | 4 | 2 | 8 |
| Unqualified pile sinking quality | 3 | 2 | 6 |
| Inaccurate construction positioning | 3 | 2 | 6 |
| The embedded depth is not enough | 2 | 3 | 6 |
| Earthwork excavation D | Improper selection of excavation equipment | 2 | 2 | 4 |
| Impact of the excavator on support or fall of support | 1 | 4 | 4 |
| The heave of pit bottom and column is too large | 3 | 2 | 6 |
| Pile leakage and mud inclusion | 4 | 3 | 12 |
| Long exposure time without support | 4 | 2 | 8 |
| Excessive surcharge outside the pit | 4 | 2 | 8 |
| Excavation in layers and blocks not according to space-time effect | 4 | 2 | 8 |
| Over excavation of earthwork | 4 | 2 | 8 |
| The exposure time of the pit bottom is too long | 3 | 3 | 9 |
| Blasting construction | Flying stones hurt people; REE1 | 2 | 4 | 8 |
| Unreasonable blasting design | 1 | 4 | 4 |
| Nonstandard management of explosives | 3 | 3 | 9 |
| Unreasonable charge structure | 2 | 4 | 8 |
| Brace system | Insufficient design resistance | 1 | 4 | 4 |
| The number of supports is not enough and the prestress is not applied in place | 3 | 3 | 9 |
| The support installation accuracy is not enough and the connection is not reliable | 3 | 3 | 9 |
| Unqualified steel support material | 2 | 2 | 4 |
| Improper setting of lifting point | 3 | 2 | 6 |
| Mechanical collision | 2 | 2 | 4 |
| Column verticality deviation, excessive uplift | 3 | 3 | 9 |
| Gale weather | 2 | 3 | 6 |
| Manual hole digging pile G | Collapse hole | 1 | 4 | 4 |
| People and objects falling into pile holes | 2 | 3 | 6 |
| Get an electric shock | 2 | 3 | 6 |
| The harmful gas in the hole exceeds the standard | 2 | 4 | 8 |
| Precipitation drainage H | Confined water inrush | 2 | 4 | 8 |
| The precipitation is not in place | 3 | 2 | 6 |
| Precipitation and drainage lead to excessive land subsidence | 3 | 2 | 6 |
| Open water pumping in pit is not timely | 3 | 2 | 6 |
| Not paying attention to information construction | 3 | 2 | 6 |
| Station structure construction WE01 B | Scaffolding A | Nonstandard erection of scaffold | 2 | 4 | 8 |
| Scaffold removal is not standard | 2 | 4 | 8 |
| Overload on scaffold | 3 | 2 | 6 |
| The protection of working face is not in place | 2 | 2 | 4 |
| Template B | Illegal operation in construction | 2 | 3 | 6 |
| The formwork is not erected firmly | 2 | 4 | 8 |
| The construction of formwork removal is not standard, the removal sequence is wrong or there are suspended formworks | 3 | 2 | 6 |
| Reinforced concrete pouring C | Concrete material, mix proportion is unqualified | 1 | 4 | 4 |
| Reinforcement material, binding, and lapping are unqualified | 3 | 2 | 6 |
| Incorrect concrete pouring method | 2 | 2 | 4 |
| Unreasonable concrete curing | 3 | 2 | 6 |
| Structural transgression | 1 | 3 | 3 |
| The whole station floats upward | 2 | 4 | 8 |
| The longitudinal deformation of station structure is too large REK7 | 2 | 4 | 8 |
| Waterproof D | Improper setting position of the construction joint (deformation joint) | 2 | 3 | 6 |
| Waterproof layer construction is not in place | 2 | 4 | 6 |
| Waterproof layer protection is not in place | 2 | 4 | 8 |
| Backfill WE01 B E | The backfill does not meet the design requirements | 2 | 3 | 6 |
| The compactness of backfill is not enough | 3 | 2 | 6 |
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| Ancillary facilities and equipment WE01 C | Ancillary facilities A | The soil nailing wall support of foundation pit of No. 2 entrance and No. 1 and No. 2 air ducts is not standardized | 2 | 3 | 6 |
| The construction of No. 1 entrance and exit excavation is not standard | 2 | 4 | 8 |
| Accessory equipment B | Unreasonable cable laying and protection | 2 | 3 | 6 |
| Fire prevention facilities are not in place | 2 | 2 | 4 |
| Electrical equipment and management are not qualified, the operation is not standard | 2 | 3 | 6 |
| Poor ventilation | 1 | 2 | 2 |
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