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Carry out cushion cap construction after the completion of bridge pile foundation construction, the bridge of municipal engineering is mainly reinforced concrete beam type cross-line bridge, the cushion cap of cross-line bridge is set below the ground to ensure driving vision and safety, so the cushion cap foundation pit needs to be excavated to ensure the working face of cushion cap construction before cushion cap construction, the foundation pit is not required to excavate in the pile foundation construction process, the pile foundation is applied directly on the original ground, the foundation pit of the cushion cap is excavated after the pile foundation construction is completed, the pile head is exposed and then the pile head is chiseled to expose the steel bar, the pile head of this part belongs to the over-irrigation amount, the strength is not enough to be affected by the mud, it needs to be chiseled, and the exposed steel bar needs to be corrected and rusted, and then lap with the cushion cap reinforcementBefore the construction of the cushion cap, it is necessary to pour a layer of plain concrete cushion on the bottom of the pit that is acceptable, the function of this cushion is to provide a solid and flat working face for the cushion cap construction and have a certain anti-drainage effect, after the cushion reaches the design strength, bind the cushion cap reinforcement, support the template, pour the cushion cap concrete, due to the large volume of the cushion cap, the mass is heavy, it belongs to the large volume of concrete, and the prevention of cracks should be considered for the large volume of concrete, and we are talking about the lap between the bored pile and the cushion cap in this subsection, so how to lap the sinking pile and the cushion capWe will talk about it again in the next class, more first-level construction engineer municipal courses, focusing on snail municipal
The excavation of the foundation pit of the cushion cap exposes the pile head
The head of the pile is chiseled to expose the rebar and the cushion is poured
Binding the reinforcement of the cap
Concrete is poured for the cap
Spanning bridge cap