Protection facilities for concrete beams?

1. The railing and anti-collision and isolation facilities should be constructed behind the pouring bracket of the concrete in the upper structure of the bridge, and its line shape should be smooth and smooth, and the expansion joints must be completely penetrated, corresponding to the expansion joints of the main girder.

2. When the protective facilities are installed with precast concrete members, the mortar strength should meet the design requirements. When there are no regulations in the design, M2 cement mortar should be adopted.

3. When the precast concrete railings are connected by tongue and groove, they should be fixed by hard plugs after being installed in place and consolidated by grouting. The strength of grouting material shall not be less than 75% of the design strength when the plug is expanded. When metal railings are used, the welding must be firm, the burrs should be polished and leveled, and rust removal and corrosion prevention should be carried out in time.

4. The anti-collision pier must be firmly connected with the reserved parts and embedded bars of the bridge deck concrete, and should be completed before being used as the waterproof layer of the bridge deck.

5. Guardrails and protective nets should be installed after the pavement of bridge deck and sidewalk is completed.

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