Arch foot structure of arch bridge

Abstract

The invention relates to the field of bridge structures, in particular to an arch foot structure of an arch bridge, which comprises a profile body, a spiral rib, an anchoring plate, an end anchoring plate and an arch rib piece, a plurality of through holes are formed in the profile body in the length direction, the spiral rib transversely penetrates through the through holes, and therefore transmission of internal force from the arch rib piece to the arch rib of the profile body is achieved; after concrete is poured, the spiral ribs can effectively restrain the skewback concrete around the sectional material main body, so that the concrete in the area is always in a multidirectional compression state, and the local pressure bearing capacity of the skewback concrete is improved; the sectionbar main body outer wrapping concrete and the arch support concrete are poured in the same batch, the problem of concrete cracking caused by pumping pressure and hydration heat of concrete in a pipeand pressure-bearing stress concentration of the end of a steel pipe can be fundamentally avoided, the structural mechanical property is optimized, and the arc foot structure has the advantages of being convenient to install, easy to use, good in economical efficiency and the like.

Description

technical field [0001] The invention relates to the field of bridge structures, in particular to an arch foot structure of an arch bridge. Background technique [0002] At present, the arch foot in the concrete-filled steel tube arch bridge generally extends the arch-rib steel pipe into the abutment concrete, and is connected with the arch-seat concrete through the shear key on the outside of the arch-rib steel pipe. After the installation of the ribbed steel pipe is completed, concrete is pumped into the arched ribbed steel pipe and filled densely. Because the concrete around the abutment is poured before the concrete filled steel tube of the arch rib, during the process of pumping the concrete filled steel tube, the cracking of the abutment concrete caused by the pumping pressure and the hydration heat of the concrete inside the tube is very common, which seriously endangers the stress safety of the structural beam and the durability of the bridge. In addition, the conven...

AI Technical Summary

Problems solved by technology

Since the concrete around the abutment is poured earlier than the concrete filled steel tube of the arch rib, during the process of pumping the concrete filled steel tube, cracking of the abutment concrete due to the pumping pressure and the hydration heat of the concrete inside the tube is very common, seriously endangering the stress safety of the structural beam and the durability of the bridge

In addition, the conventional arch foot mainly transmits the internal force through the end pressure of the steel pipe concrete embedded in the abutment, and the stress concentration of the abutment concrete is obvious, and the resulting cracking of the concrete is also more prominent

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