Type GQF-Z80 bridge expansion device features: low building height, homemade hot rolled profiled steel forming the overall height of only 50mm, has the advantages of simple structure, convenient installation, obvious reliability, comfort and durability. Suitable for pavement thickness is equal to or greater than 80mm and less than or equal to a variety of bridge expansion of 80mm, both for the convenience of the old bridge device replacement, and can be used for the new bridge built in use.
The middle type GQF-C bridge expansion device of rubber sealing strip the technical requirements: the use of chloroprene rubber (CR) sealing expansion device and temperatures for rubber belts for -25 -+60 DEG C area。 The use of natural rubber (NR) sealing telescopic rubber belt joint device applicable to the temperature of -40 DEG -+60 DEG area。
Construction technology and method of bridge expansion joint:
construction technology and methods
In the surface layer of asphalt concrete paving completed, expansion joints are used after the block construction method, construction technology and methods are as follows: in the surface layer of asphalt concrete paving completed, expansion joints are used after the block construction method,
The construction technology and methods are as follows:
marking, cutting, marking, deck and asphalt concrete paving is completed, about cutting machine cutting. The asphalt concrete paving is completed, according to the reserved slot width or notch wide on each side about 5cm for cutting machine cutting.
on the basis of the actual bridge abutment (pier) at the center of the expansion joint line, then anti size to both sides according to the design requirements, from the joint center according to the actual abutment joints (the center line, and then back to the size of both sides according to the design requirements of line to the desired width on both sides of the pop-up construction, should pay attention to changes in line width abutment to both sides the pop-up construction required width (uniform design 60cm), we should pay attention to changes of abutment width; the line should be straight, to pay attention to changes of abutment width; the line should be straight, uniform width. Then use concrete cutting machine by drawing a line on the asphalt pavement joint cutting to ensure cutting; seam position, widthThe degree of consistency. Then use the concrete cutting machine by drawing a line on the asphalt pavement joint cutting; to ensure the cutting position, the painting line on Asphalt Pavement of the slit size accurate, vertical, straight, no defect. Accurate size, vertical, straight, no defect. The step of construction use "the two cut construction method at the cutting edge, the step of construction using the two slit method construction. The first time slot according to the construction requirements of variable line anti 5cm inward edge, the slit extends two times. The construction method of shrinkage after installation for detecting flatness, two slit to the requirement of crack width, to ensure the cutting edge of the order.After the device is installed, it is based on the detection of flatness, and then the two cut to the required seam width, so as to ensure the cutting edge of the cutting edge.