Positioning method of prefabricated box beam embedded steel plates

Abstract

The invention discloses a positioning method of prefabricated box beam embedded steel plates, and relates to the technical field of box beam prefabrication. According to the positioning method of theprefabricated box beam embedded steel plates, the steel plates can be reliably positioned, and moving of the steel plates is not limited absolutely. The positioning method comprises the following steps: A, a box beam prefabricated pedestal and positioning rods are prepared, two sandpits are formed in the box beam prefabricated pedestal, the length and width of the sandpits are both larger than thelength and width of the embedded steel plates, and the sandpits are fully filled with fine sand; B, one of the embedded steel plates is placed into the middle of the corresponding sandpit, the embedded steel plate is struck to enable the lower part of the embedded steel plate to be embedded into the fine sand, and thus the inclination angle of the upper surface of the embedded steel plate meets the requirement; C, the corresponding positioning rods are inserted into the fine sand and the bottom of the sandpit, the tops of the positioning rods are lower than the surface of the box beam prefabricated pedestal and are subjected to point welding together with the embedded steel plate, and the two sides of the end of the embedded steel plate are each provided with the corresponding positioningrod; D, the sandpit is leveled; and E, the step B, the step C and the step D are repeated, and the corresponding embedded steel plate, positioning rods and fine sand are arranged in the other sandpit.

Description

technical field [0001] The invention relates to the technical field of box girder prefabrication, in particular to a method for positioning prefabricated box girder pre-embedded steel plates. Background technique [0002] Prefabricated box girders are widely used in bridge construction. Specifically, the two ends of the prefabricated box girder are mounted on the supports at the top of the bridge column, and multiple prefabricated box girders constitute the main body of the bridge. [0003] Such as Figure 6 As shown, there are two embedded steel plates on the bottom surface of the prefabricated box girder, and the embedded steel plates are used to contact the support at the top of the column of the load-carrying bridge. Prefabricated box girders are often not installed horizontally, and need to have a certain inclination angle, which is often achieved by inclining the embedded steel plate. The angle of inclination of the embedded steel plate needs to be set precisely to en...

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Problems solved by technology

[0006] However, this method has the following disadvantages: (1) The size of the groove is the same as that of the embedded steel plate. Although it is beneficial to ensure the position accuracy of the embedded steel plate, the embedded steel plate cannot be moved when the box girder is stretched due to the contact between the embedded steel plate and the wall of the groove. , it is easy to cause the steel strands used for tension to break, and the end of the box girder to be squeezed and broken.

(2) When adjusting the angle of the pre-embedded steel plate, multiple bolts need to be tightened repeatedly, and the adjustment process is cumbersome

(3) Some adjustment parts, such as embedded sleeves, are poured into the box girder and cannot be reused, resulting in a certain amount of waste

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