A method of installing a π-shaped rigid frame on an arch
An installation method and rigid frame technology, applied in the direction of erecting/assembling bridges, buildings, bridge construction, etc., to achieve low cost, high construction efficiency, and improve construction efficiency
Active Publication Date: 2020-10-09
CHINA RAILWAY NO 5 ENG GRP MECHANICAL ENG
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the existing prefabricated hoisting methods, and provide a construction method that is simple and cost-effective, and does not require complex prefabricated tire frames to be erected in the prefabricated field, nor does it need to erect temporary supports at high altitudes at the bridge site. Prefabricated hoisting method of π-shaped rigid frame on arch
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0029] line in further detail. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0030] refer to figure 2 , in order to speed up the construction progress and reduce safety risks, the π-shaped rigid frame on the arch can be constructed by prefabricated hoisting. The π-shaped rigid frame 12 is divided into two parts: prefabricated part concrete 5 and wet joint concrete 9. It is poured in the prefabricated yard, hoisted to the bridge position and taken temporary support measures, and then cast wet joint concrete 9 at the height of the bridge position. Such as Figure 8 As shown, since the height of the web plate of the π-shaped rigid frame 12 of the vault changes along the shape of the arch rib elevation, if the upright prefabrication is used, more prefabricated tire frames are required, and a large number of web plates need to be provided in the formwork at the bottom of ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to the field of bridge engineering construction, and in particular, discloses a mounting method of a pi type steel frame on an arch. The mounting method comprises the following steps: 1) an inverted prefabricated table base is arranged in a prefabrication field to finish prefabrication of the pi type steel frame; profile steel support legs are embedded; and concrete filling holes are reserved; 2) a cable crane is used for continuous twice overturning by 90 degrees in a lifting area; and the pi type steel frame is overturned from an inverted state to an upright state; 3) after the cable crane is used for lifting the pi type steel frame to a bridge position, the pi type steel frame is temporarily fixed by using the embedded profile steel support legs, and the connection between a stress skeleton and a main arch rib of the pi type steel frame is finished; and 4) a wet joint template and a protecting foot steel plate are mounted; and wet joint concrete is filled in the reserved concrete filling holes to finish installation of the pi type steel frame. The mounting method performs the prefabrication of the pi type steel frame by adopting the inversion mode to achieve convenience to construct, low cost and high construction efficiency, and uses the embedded steel support legs as temporary support piers in the bridge position to improve the lifting construction efficiency.
Description
technical field [0001] The invention belongs to the field of bridge engineering construction, and in particular relates to a method for installing a π-shaped rigid frame on an arch. Background technique [0002] In the railway overhang concrete-filled steel tube arch bridge, in order to strengthen the lateral connection between the left and right main arch ribs, increase the lateral stiffness of the bridge, and improve the overall stability of the structure, a π-shaped rigid frame is often installed at the arch top. The π-shaped rigid frame is a thin-walled special-shaped concrete structure, its web plate is parallel to the plane of the main arch rib, and the height of the web plate varies along the shape of the arch rib facade. In order to control the temperature stress, the π-shaped rigid frame is generally arranged in a joint of about 4.0m, and expansion joints are set between the joints. [0003] At present, the construction of π-shaped rigid frame mainly includes two m...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): E01D21/00E01D101/26
CPCE01D21/00E01D2101/26
Inventor 曹广银朱耘龙黄平雷建华苏桂杰
Owner CHINA RAILWAY NO 5 ENG GRP MECHANICAL ENG