Large-span eccentric leaning type steel box tied-arch bridge float-towing erection construction technology

Abstract

The invention discloses a large-span eccentric leaning type steel box tied-arch bridge float-towing erection construction technology. The arch bridge to be constructed is a tied-arch bridge erected on a riverway, and a bridge superstructure comprises bilaterally symmetrically arranged arch bridge superstructures. The float-towing erection construction of the arch bridge to be constructed comprises the steps: 1, making first-phase preparations: sliding system construction and mobile support device processing; 2, bridge superstructure ground splicing: respectively splicing the two arch bridge superstructures by using sliding systems; 3, bridge superstructure float-towing construction, wherein the process is as follows: sliding system construction and arch bridge superstructure float-towing construction; 4, arch rib lower connection structure construction; and 5, bridge deck board paving. The technology is simple in step, and reasonable in design and simple and convenient in construction, the construction effect is good, the large-span eccentric leaning type steel box tied-arch bridge float-towing erection construction process can be completed simply and conveniently and quickly, and the construction quality is easily guaranteed.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a construction process for a floating tow frame 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 ne...

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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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