Get ready.
1, the significance of bridge construction preparation.
(1) The preparation before bridge construction is one of the important links to adhere to the basic procedures and construction procedures.
(2) Preparation before construction is one of the main contents of bridge construction organization and management.
2. The preparatory work stage before bridge construction
(1) The preliminary design of the first-phase bridge project has been completed, and it has been included in the preliminary work stages such as bidding and signing after the national or regional construction plan.
(2) The second stage is the preparatory work stage of successfully completing various construction tasks after the construction unit contracts the construction tasks and before the construction starts.
Matters needing attention
1. Attention should be paid to the construction quality of arch adjustment slope layer. During the construction of this layer, special attention should be paid to the specifications, gradation and mixture ratio of various materials to ensure the smoothness and compactness within the effective width of this layer, which is the basis for ensuring the quality of grassroots construction.
2. Strengthen grassroots maintenance. After the completion of grass-roots construction, use sacks for maintenance or spray asphalt emulsion for protection. If the traffic cannot be closed, the traffic of heavy vehicles shall be restricted, and the speed shall not exceed 20km/h, and attention shall be paid to the damage caused by other traffic facilities to the grassroots. If the car groove (pit groove) is loose, it should be repaired and compacted with the same material. It is forbidden to fill with loose granular materials.
3. In the base construction, we should strictly pay attention to the loose laying thickness, try to reduce the base with the best water content, and carry out artificial renovation after initial pressing, especially to strengthen the compactness of the edge template at the base. If it cannot be rolled in place due to special circumstances, workers' hammers and vibration rammers shall be used for layered compaction to ensure the quality of structural layers.