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

Abstract

The invention discloses a large-span eccentric lean-against type steel box tied arch bridge surface towing construction method. A constructed arch bridge is a tied arch bridge erected over a river way, and an upper bridge structure of the arch bridge comprises two upper arch bridge structures symmetrically arranged left and right. The surface towing construction process of the constructed arch bridge includes the steps that firstly, early stage preparation work is conducted, wherein a sliding system used for surface towing construction is constructed, and a movable supporting device used for surface towing construction is machined; secondly, the upper bridge structure is spliced on land, wherein the sliding system is used for splicing the two upper arch bridge structures; and thirdly, surface towing construction of the upper bridge structure is conducted in the following processes that 301, a traction system is constructed, wherein the traction system used for surface towing construction is constructed; and 302, surface towing construction of the upper arch bridge structures is conducted. By the adoption of the method, the steps are simple, design is reasonable, construction is easy and convenient, the construction effect is good, the surface towing construction process of the large-span eccentric lean-against type steel box tied arch bridge can be easily, conveniently and quickly finished, and the construction quality is easy to guarantee.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a floating and dragging construction method of a large-span eccentric leaning type steel box tie rod arch bridge. 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 ...

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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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