Suspension Bridge Horizontal Anchorage Structure and Construction Method

Abstract

The invention provides a horizontal anchorage structure and a construction method of a suspension bridge. The horizontal anchorage structure includes a construction hole excavated from the back side of the mountain in the bridge position area of ​​the suspension bridge, a rear anchor chamber, an anchor plug body chamber and a front anchor chamber formed by horizontal construction from the construction hole to the side of the suspension bridge. Construct the main cable tunnel to the side of the suspension bridge, pour reinforced concrete in the anchor plug body chamber to form the anchor plug body, install loose cable saddles in the front anchor room, and install cable-turning saddles in the main cable tunnel. The saddle turns horizontally and passes through the main cable flat hole to the scatter cable saddle. The main cable is dispersed into strands through the scatter cable saddle and then connected with the anchor cable anchored on the anchor plug body. Compared with inclined tunnel anchors and composite anchors, the present invention expands the bearing range of rock mass, has high anchor bearing capacity, can avoid the mutual adverse influence of anchor and tunnel, improves the stability and safety of anchor, reduces construction difficulty, and reduces engineering investment , easy operation and maintenance.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering and relates to a suspension bridge anchorage structure, in particular to a suspension bridge horizontal anchorage structure and a construction method. Background technique [0002] At present, the anchorage structure types of suspension bridges mainly include gravity anchorage, tunnel anchorage, rock mass anchorage, gravity anchorage (tunnel anchorage) + anchor cable anchorage, rock mass and reinforced concrete slab anchorage and concrete beam anchorage. anchor etc. Gravity anchors are generally used in weak rock foundations on the surface, relying on the friction between the self-weight and the foundation to resist the main cable tension. The excavation of earth and stone and the amount of concrete construction are large, and the impact on the ecological environment is also great. Tunnel-type anchors are usually built in hard or well-integrated rock mass in inclined tunnels. The tensi...

AI Technical Summary

Problems solved by technology

The inclined tunnel anchor is built on the side of the suspension bridge. A bridge with a large span and a large tonnage load requires a large anchorage, especially a suspension bridge with a weak surrounding rock, poor integrity and a relatively large tonnage. The tunnel anchor chamber is huge

Some suspension bridges are limited by lines and topography. Tunnel anchors often need to be built in IV~V rock masses with low engineering quality. Most of the tunnels pass through the rock mass between the two anchorages. In addition, some railway passenger stations are located in it, and the carriageways and platforms take up a lot of space. The wall is thin, and the interaction between the anchor and the tunnel is large; it is extremely difficult to form a tunnel in an inclined tunnel with a large anchorage, and the excavation and concrete volume will increase significantly, requiring large investment, long construction period and high risk

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