|
| Category | Scheme 1 | Scheme 2 | Scheme 3 |
|
| Program content | Grouting cement water glass treatment [7] | Bottom changing of long-distance overhead lines [8] | “Anchor-Grouting-Drainage” integrated comprehensive treatment |
|
| Scientific applicability | It can quickly block and repair the fracture, but the plugging effect is poor under the condition of flowing water;
The cement consolidation strength cannot meet the structural strength requirements of the railway tunnel bottom structure. Water glass has a strong corrosion effect on the waterproof layer at the tunnel bottom, and the cracks and leakage water diseases are easy to recur. | It can completely solve the structural damage and water leakage of the ballastless track, but it needs to be constructed under the condition of sufficient time for single maintenance skylight time (4 hours–6 hours) and interval speed limit, which has a great impact on online transportation. The scheme is suitable for tunnel bottom structure damage, which affects traffic safety. | The reinforcement material has the advantages of fast hardening, hydrophobicity, and high strength, which can meet the construction requirements of maintenance skylight time. After reinforcement, the stress of tunnel bottom structure is optimized and the durability is good. The transverse drainage structure under rail has the advantages of high strength and high water carrying capacity. The “Anchor-Grouting-Drainage” integrated, comprehensive treatment scheme can effectively control the crack damage and water leakage of the railway tunnel bottom structure. |
|
| Construction operability | The machine is convenient, the construction process is simple, each process can construct across the maintenance skylight, the time of a single maintenance skylight is short, the construction can be carried out within 2 hours maintenance skylight time, and the process can be divided into parts. | The construction process is complex, and each process cannot be connected across the maintenance skylight. The market demand for single maintenance skylight time is long, which needs more than 4 hours. | The machine is convenient, the construction process is simple, each process can be connected across the maintenance skylight, the time of a single maintenance skylight is short, the construction can be carried out within 2 hours maintenance skylight time, and the process can be divided into parts. |
|
| Economic rationality | Low | High | Moderate |
|
