A construction method of steel pipes with double limbs for main arch
A construction method and technology of steel pipes, applied in the erection/assembly of bridges, bridges, buildings, etc., can solve the problems of difficult construction quality assurance, complex operation schemes, large timber and wooden wedges, etc., to save materials and manpower, and the erection method is simple Easy to operate and save labor costs
Inactive Publication Date: 2017-07-04
ZHENGPING ROAD & BRIDGE CONSTR CO LTD +1
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AI Technical Summary
Problems solved by technology
The prior art full hall support cannot satisfactorily solve the above-mentioned technical problems of the main arch bottom formwork
The construction quality is difficult to guarantee, the operation plan is complicated, and a large amount of wood and wooden wedges are consumed, and the construction period of the whole hall support is long
high construction cost
Method used
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Embodiment 1
[0041] The preferred scheme of the construction method of the double-leg steel pipe of the main arch and arc of the present invention
[0042] Basic layout of the bracket system
[0043] 1. The cast-in-place supports of the main arch all adopt full-height floor supports, and the overall structure and detailed structure of the supports are set according to the principle of geometrically invariant system. The support system adopts a Φ48mm×3.5mm bowl buckle single steel pipe support, and the lower end of the pole is provided with a fixed base pad to support the foundation concrete. The upper (top) end of the bowl-button steel pipe support pole is equipped with an adjustable steel U-shaped jacking bracket. Place it in the U-groove of the top bracket and fix it. Set the Φ48mm×3.5mm double-leg steel pipe in the direction of the vertical bridge on the outer corrugation to form an arch arc. Wooden ribs are used as formwork to set across the bridge. The main arch concrete bottom for...
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The invention provides a construction method for double-component steel tubes of main arch arcs. The construction method is characterized in that a full frame is erected based on the bendability of the steel tubes, the top radian of an arch frame is adjusted to be identical with the bottom radian of a main arch ring according to the structure mode of an arch bridge bottom mold in the full frame, and therefore the bottom radian of the arch ring can be smooth and attractive, the curve of the arch bridge bottom mold can effectively meet the radian requirement of the design, fold line type arcs are avoided, and erection and formation of the full frame can be completed. The technological process comprises the steps of carrying out construction preparation; surveying and setting out; adjusting the elevation of each piece of horizontal square timber; fixing the double-component steel tubes at the arch camber part; bending the steel tubes to be fixed to the edge of the square timber of each row through external force. The erecting method is simple and easy to operate and does not need manpower or assist from other mechanical equipment, and therefore a lot of materials such as square timber, wooden wedges and pull rods needed by adjusting the main arch ring of a bridge are saved. Compared with other construction methods, the construction method has the advantages that the bottom radian of the main arch of the arch bridge can be guaranteed better, the labor cost is greatly saved compared with the mode of adjusting the radian through the wooden wedges, and the time for the pre-pressing work of arch frame forming preparation is shortened.
Description
technical field [0001] The invention relates to the construction technology of an arch bridge, in particular to a construction method of steel pipes with two limbs of a main arch arch arc. Background technique [0002] Before the construction of the main arch ring of the arch bridge, it is necessary to set up the whole hall support, and adjust the arc of the top of the arch frame to the same curve as the bottom arc of the main arch ring in a certain structural way, so that the bottom arc of the arch ring is smooth and beautiful. The prior art full hall support cannot satisfactorily solve the above-mentioned technical problems of the main arch bottom mold. The construction quality is difficult to guarantee, the operation plan is complicated, a large amount of wood and wooden wedges are consumed, and the construction period of the whole hall bracket is long. Construction costs are high. Contents of the invention [0003] In order to overcome the deficiencies of the above-m...
Claims
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IPC IPC(8): E01D21/00
Inventor 李元庆宋方华徐安花李万林刘磊聂亚潮史贵章张楠朱磊王宏韩进财
Owner ZHENGPING ROAD & BRIDGE CONSTR CO LTD