Truss integral lifting type bridge high pier creeping formwork device and construction method

An integral lifting and truss technology is applied in the field of pouring bridge piers to achieve the effects of good economic benefits, fast lifting speed and cost saving

CN111749140APending Publication Date: 2020-10-09陕西普惠钢构有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2020-10-09

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Abstract

The invention discloses a truss integral lifting type bridge high pier creeping formwork device and a construction method. Climbing rails are arranged on four embedded climbing rail fixing pieces at the rectangular corners of a bridge abutment; a top truss operating platform is arranged at the upper end of each climbing rail, and climbing rail anchor bolts are arranged at the lower end; an outer formwork is arranged between every two adjacent climbing rails in the circumferential direction; an inner formwork is arranged on the inner side of the outer formwork; an outer mold truss operating platform is arranged on the outer side of each climbing rail; a hydraulic jacking mechanism is arranged between the outer mold truss operating platform and the climbing rails; the outer mold truss operating platform is connected with the top truss operating platform through a first hydraulic lifting mechanism; an inner mold truss operating platform is arranged on the inner side of the inner formwork,and the inner mold truss operating platform is connected with the top truss operating platform through a second hydraulic lifting mechanism; the construction method comprises the steps that the climbing rails and the top truss operating platform are installed; the outer formwork and the outer mold truss operating platform are lifted, and pier body solid transition section concrete is poured; theclimbing rails are jacked; the inner formwork and an inner mold truss operating platform are installed; standard sections of the bridge pier body are constructed; and the whole structure is dismantled.
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Description

technical field

[0001] The invention belongs to the technical field of pouring bridge piers, and in particular relates to a climbing formwork system and a construction method for a truss integral lifting type high pier. Background technique

[0002] At present, the main line of the national expressway network has been completed, and the expressway branch lines and connection lines in better areas have also been constructed. It has gradually extended to mountainous areas, where the terrain is steep, and the terrain is mostly deep ditches and steep slopes. Due to its own advantages, continuous rigid frame bridges with high piers and large spans are widely used in the construction of mountainous roads. In the future construction of expressway projects At that time, the construction of high piers will be a subject that we will often face in the future.

[0003] Conventional high pier construction methods include overturning formwork, sliding formwork, and climbing formwork. Th...

Examples

Embodiment Construction

[0050] The present invention will be described in further detail below with reference to the drawings and examples, but the present invention is not limited to the following embodiments.

[0051] exist Figure 1-8 Among them, four climbing rails 4 are fixedly installed on the bridge abutment 7 of the bridge pier climbing formwork device of the truss overall lifting type bridge high pier climbing formwork device in this embodiment, which is located on the four corners of the rectangle. It is a steel box girder structure with strong crosswind resistance and good bearing capacity, which can prevent sudden gusts at high altitudes from threatening the structural system. The length of the climbing rail 4 is greater than the construction length of the high pier section of the 3-section bridge. The upper end of the climbing rail 4 is threaded. The fastening connector is fixedly installed with the top truss operation platform 1, and the climbing rail anchor bolt 5 is installed at the l...