Construction Method of Composite Anchorage Between Rock Mass and Reinforced Concrete Slab of Suspension Bridge

Abstract

The invention provides a suspension bridge rock mass and reinforced concrete plate composited type anchorage and a construction method thereof. The construction method comprises the steps that 1, the composited type anchorage is located on one side or the two sides of a suspension bridge, a front anchor chamber is excavated on the side slope side of a mountain, a worker enters the mountain through a construction hole with a small cross section to excavate a back anchor chamber, and rock masses between the front anchor chamber and the back anchor chamber are reserved to replace a reinforced concrete anchor plug; 2, hole sites are quincuncially arranged in the front anchor surface and the back anchor surface, and anchor cable holes are drilled from the front anchor surface to the back anchor chamber; 3, a reinforced concrete anchor plate is poured in the back anchor chamber, and anchor holes are reserved; 4, anchor cables penetrate through the reserved rock masses and the reinforced concrete anchor plate to the back anchor chamber through the anchor cable holes from the front anchor chamber and are anchored; and 5, a main cable is connected with the anchor cables through a cable splaying saddle. According to the suspension bridge rock mass and reinforced concrete plate composited type anchorage and the construction method thereof, the resistance of the rock masses is made full use of, excavation of large-size earth rock is avoided, construction of large-size concrete is reduced, the influence on the bridge area ecological environment is small, the construction cost of the composited type anchorage is significantly reduced compared with a tunnel type anchorage, and economic benefits are great.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering and relates to the design and construction of suspension bridge anchors, in particular to a composite anchor of suspension bridge rock mass and reinforced concrete slab and a construction method thereof. Background technique [0002] At present, the anchorage types of suspension bridges include gravity anchors, tunnel anchors, and composite anchorages of gravity anchors (tunnel anchors) + anchor cables. Gravity anchors are used in soil and weak rock foundations, relying on the friction between their own weight and the foundation to resist the tension of the main cable. The amount of earthwork excavation and concrete construction is large, and the impact on the ecological environment is also great. Tunnel-type anchorage is often used in canyon areas with relatively hard and complete rock mass. It transmits most of the tension in the main cable to the surrounding rock through the anchor p...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a composite anchorage of suspension bridge rock mass and reinforced concrete slab and its construction method, which can replace the tunnel anchor and solve the problem that the output of the anchor cable and the anchor plug body is not easy to coordinate. The rock mass is used to replace the reinforced concrete anchor plug body, and the rock mass’s own resistance is fully utilized to transfer the load of the main cable of the suspension bridge directly to the rock mass through the anchor cable and the reinforced concrete anchor plate of the rear anchor chamber. Its performance is safe and reliable, cost-effective, and beneficial environmental protection

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