Large-span eccentric lean-against type steel box tied arch bridge surface towing erection construction system

Abstract

The invention discloses a large-span eccentric lean-against type steel box tied arch bridge surface towing erection construction system. The system comprises a sliding system for supporting and longitudinal sliding of an upper structure of a bridge, a movable supporting device used for supporting the front side of the upper structure of the bridge and a traction system used for dragging the upper structure of the bridge to horizontally move forwards in the longitudinal bridge direction. The movable supporting device is located right in front of the sliding system. The sliding system comprises a temporary supporting structure, a lower sliding way and an upper sliding device. The movable supporting device is a supporting device which is located on a river way and can move forwards and backwards on the river way and comprises a barge and a temporary supporting frame for supporting the upper structure of the bridge. The traction system comprises a traction anchoring structure, a traction mechanism and a traction counter force seat, and the traction counter force seat is located right in front of the upper structure of the bridge. The large-span eccentric lean-against type steel box tied arch bridge surface towing erection construction system is simple in structure, reasonable in design, easy and convenient to construct, good in use effect and capable of simply, conveniently and quickly finishing the surface towing construction process of the large-span eccentric lean-against type steel box tied arch bridge.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a large-span eccentric leaning type steel box tie rod arch bridge floating tow frame construction system. Background technique [0002] The Sunan Canal is one of the main channels of water transportation in the country. It is the main component of the Beijing-Hangzhou Grand Canal. The main axis of the web. The navigation clearance requirement of the tertiary waterway regulation project of the Wujiang section of the South Jiangsu Canal is 80×7m. The newly-built Yunli Bridge is located at the place where Yunli Road, Wujiang District, Suzhou City crosses the Beijing-Hangzhou Canal for the third-level waterway regulation project of the Wujiang section of the South Jiangsu Canal. 100+3×(3×26)m, of which the main bridge is a leaning tied arch bridge, and the approach bridge is a prestressed concrete continuous box girder. The main bridge of the newly built Yu...

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Problems solved by technology

The main bridge of Yunli Bridge has a single-aperture span of 100m, and an inward-sloping oblique arch is arranged on both sides of the left and right main arch ribs. The angle between the main inclined arch ring and the vertical plane is 19°. The weight is about 2700t. How to use the formulated comprehensive construction technology to safely and reliably complete the onshore assembly and floating tow erection of such a large-span, heavy-weight eccentric leaning arch bridge, the process is complex, difficult, and safety risks are high, and the maximum cantilever reaches 23.2 m, there are high requirements for the foundation and supports on the side of the river. At the same time, the Beijing-Hangzhou Canal has frequent ships, which allow a short sailing time. It is required to complete the floating and towing work within the sailing time. The task is heavy. At present, there is no successful experience for reference. less data

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