A construction method for a multi-directional adjustable cast-in-place box girder support system for oblique-span low-clearance active highways

Abstract

The invention discloses a construction method for a diagonal-span low-clearance road-on-duty multi-azimuth adjustable cast-in-place box beam support system. The method comprises the following steps: arranging foundations and establishing temporary piers on stopways and medium dividers in advance, arranging wide-range high-precision electronic oil jacks on the tops of the temporary piers, arranging a track through fixing feet, using a Bailey beam or a military beam to make a force-bearing truss, after installing suspenders and lower hanging beams on the force-bearing truss, arranging sliding wheels at certain interval on the lower part of the truss, and arranging a driving electric car, the force-bearing truss and the driving electric car being fixed by a connecting end, and arranging template supports on the force-bearing truss and the lower hanging beams, installing a bottom die, side dies, an inner die, and end dies, to complete construction of the cast-in-place box beam support. The method realizes multi-azimuth adjustment of the cast-in-place box beam support, and can control clearance on site in real time, and normal operation of a road is not influenced.

Description

technical field [0001] The invention relates to a construction method of a cast-in-place box girder support, in particular to a construction method of a multi-directional adjustable cast-in-place box girder support system for an oblique-span low-clearance active road. Background technique [0002] In recent years, more and more bridges need to be cast-in-place constructed obliquely or across active roads. Generally, oblique or spanning bridges are required to meet certain clearance standards and span standards. During the construction process, the road cannot be blocked, and the normal operation of the road cannot be affected. Operation, so as not to affect the convenience and safety of highway driving, limited by the above-mentioned many factors, the support erection in the construction of cast-in-place box girder has always been the focus and difficulty in construction. [0003] At present, a cast-in-place box girder construction technology with brackets is often used to d...

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Problems solved by technology

[0003] At present, a cast-in-place box girder construction technology with brackets is often used to deal with the complexity of the current construction. This type of bracket is composed of temporary buttresses, stressed trusses, suspension systems and formwork, and can meet the requirements of driving under the bridge through a reasonable design layout. Clearance and roadway width requirements. In this scheme, the position of the force truss is related to the size of the traffic clearance under the bridge and the width of the roadway. However, the force truss in this scheme is fixed. Once the support construction is completed After that, the vertical and horizontal positions of the stressed trusses cannot be adjusted. Therefore, if special circumstances occur during bridge construction and the angle and orientation need to be adjusted, the position of the fixed stressed trusses may not be able to meet the strain requirements.

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