Tensioned-string-type fiber reinforced polymer (FRP) tube seawater coral aggregate concrete arch bridge structure and construction method thereof

The invention discloses a tensioned-string-type fiber reinforced polymer (FRP) tube seawater coral aggregate concrete arch bridge structure and a construction method thereof. The tensioned-string-typeFRP tube seawater coral aggregate concrete arch bridge structure comprises a plurality of arc-shaped arch bodies which are arranged side by side, and a plurality of supporting rod structures are arranged below all the arc-shaped arch bodies; all the arc-shaped arch bodies comprise arc-shaped FRP tubular arch body forms, all the supporting rod structures comprise FRP tubular supporting rod forms,and seawater coral aggregate concrete is poured into the arc-shaped FRP tubular arch body forms and the FRP tubular supporting rod forms; arch feet of all the arc-shaped FRP tubular arch body forms are fixedly poured into a concrete foundation, and pore passages used for allowing prestressed FRP stranded wires to penetrate are preformed in the concrete foundation; the lower parts of all the supporting rod structures are supported by the prestressed FRP stranded wires, and all the prestressed FRP stranded wires penetrate through the pore passages in the concrete foundation and anchored at the edge of the concrete foundation; and the tops of the arc-shaped arch bodies are covered with soil and paved with a pavement. According to the arch bridge structure, during ocean engineering construction, local materials of seawater and coral aggregate can be used for preparing the concrete, the material transporting cost is lowered, and the good economic benefit is achieved.