Track beam is a box culvert construction under railway, and the method of strengthening railway on it is introduced in detail.

Box culvert construction generally adopts cast-in-place method. The bottom layer is set in the excavated trench, and a layer of concrete cushion is poured. Then tie the processed steel bars on site to support the inner and outer molds. For larger box culvert, the bottom plate and the lower half side wall are poured first, then the upper side wall and the top plate are bound with steel bars to support the internal and external formwork, and the upper half side wall and the top plate are poured. When the concrete strength meets the design requirements, the formwork shall be removed and backfill soil shall be filled on both sides of the box culvert.

Extended data

When box culvert crosses railways, bridges, culverts and pipelines, the following safety protection measures can be taken:

1. When jacking box culvert under railway subgrade, it is necessary to reinforce the railway line and limit the driving speed in order to ensure the safety of driving and construction.

2, small box culvert can be used to adjust the rail beam, rail beam to strengthen the line.

3. Box culvert with larger aperture can be reinforced by capping beam and longitudinal and transverse beam, and I-beam and steel plate are shelled, and the speed should be strictly controlled.

4. When the soil quality is poor, the bearing capacity is low, the soil content is high, the railway traffic is busy, and the speed limit is not allowed to be too high, the method of changing beams with low height can be adopted.

5. When the box culvert crosses the pipeline, the protection methods of exposing the pipeline and strengthening construction monitoring can be adopted.

In the process of jacking, the original line reinforcement system, all parts of the box, jacking system and back should be measured and monitored. The survey monitoring scheme should be included in the construction organization design or construction technical scheme.

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