An arch bridge arch foot structure

Abstract

The present invention relates to the field of bridge structures, specifically an arch foot structure of an arch bridge, which includes a profile body, spiral ribs, anchor plates, end anchor plates and arch ribs. The profile body is provided with a plurality of through holes along the length direction. The spiral reinforcement passes through the through hole horizontally, so as to realize the transmission of the internal force from the arch rib to the main body of the profile. After the concrete is poured, the spiral reinforcement can effectively restrain the abutment concrete around the main body of the profile, so that the concrete in this area is always under multi-directional compression state, so as to improve the local pressure bearing capacity of the abutment concrete; the main outsourcing concrete of the profile and the abutment concrete are poured in the same batch, which can fundamentally avoid the pumping pressure of the concrete in the pipe, the heat of hydration, and the concentration of the pressure stress at the end of the steel pipe. Concrete cracking problem, optimized structural mechanical properties, has the characteristics of easy installation, simple use, and good economy.

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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