An overall active underpinning structure and underpinning method for large-tonnage multi-pile foundations of bridges
A large-tonnage, integrated technology, applied in infrastructure engineering, bridges, bridge construction, etc., can solve problems such as small safety factor, cracking of bridge superstructure, differential settlement, etc., to achieve a clear force conversion path, avoid cracking, stress Performance and Durability Reliable Results
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[0027] see Figure 2 to Figure 5 As shown in the figure, the overall active underpinning structure of a large-tonnage multi-pile foundation of a bridge of the present invention includes: a plurality of transverse platform beams 1, a plurality of longitudinal platform beams 2, and a plurality of rear platform beams. Casting reinforced concrete underpinning component 3;
[0028] A plurality of transverse cap beams 1 and a plurality of longitudinal cap beams 2 are cast-in-place as a whole, and a plurality of post-casting node reserved spaces 4 are reserved on the longitudinal cap beams 2; the post-cast reinforced concrete underpinning components 3 are placed in In the reserved space 4 of the post-casting node, the post-cast reinforced concrete underpinning assembly 3 includes: a hoop 31, at least four jacks 32, the main reinforcement of the pile body 33, the spiral stirrup 34, and the punching-resistant reinforcement in the beam 35 And the tension bottom reinforcement 36 in the ...
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