A kind of precast construction technology of concrete crane beam
A construction process and concrete technology, which is applied in the field of industrial construction, can solve the problems of unsightly appearance of concrete crane beams, uneven embedded parts, and no embedded parts of concrete crane beams, so as to achieve beautiful appearance, convenient construction and operation, The effect of reducing construction costs
Active Publication Date: 2014-10-29
SINOHYDRO BUREAU 14 CO LTD
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Problems solved by technology
[0002] At present, most of the crane girders in thermal power plants and other industrial plants use prefabricated concrete crane girders. Conventional concrete crane girders are prefabricated using combined steel formwork, steel pipe frame support and tension screw rods to fix the combined steel formwork. The prefabricated concrete crane The appearance of the beam is not beautiful, the embedded parts on the concrete crane beam are not smooth, or the embedded parts cannot be found after the concrete crane beam is demoulded
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[0016] Choose a flat area not less than 600m2 2 The site (and the site has convenient transportation to the workshop where the concrete crane beam is installed). The concrete crane beam is prefabricated and hardened by pouring concrete on site, and the thickness of concrete pouring is 20cm. Pour a number of concrete pedestals 1 on the hardened site. The layout of the concrete pedestals (that is, the bottom mold of the concrete crane beam) is shown in Figure 3. The center distance between the pedestals is 4m. The height of the lowest point is not less than 30cm, and the top surface of the pedestal is constructed into an arch along the length direction (the arch height is 3‰ of the length of the pedestal). After the hardened concrete on the prefabricated site and the pedestal concrete reach 28 days of age, use a stone pen to mark the position of the stressed steel bars and stirrups at the bottom of the crane beam on the pedestal, and place the reinforced protective layer cushio...
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Abstract
The invention relates to a construction technology for prefabricating a concrete crane beam. The construction technology comprises reinforced bar manufacturing and installing, embedded part installing, molding board installing, concrete casting and concrete curing. A bottom die for prefabricating the concrete crane beam is a concrete pedestal, and machined crane beam reinforced bars are arranged on the pedestal. Embedded parts on the bottom side of the crane beam are placed and fixed on the concrete pedestal before the reinforced bars are installed; the embedded parts on the side faces of the crane beam are firstly fixed at the corresponding positions of a side die by using screws and then are installed in place together with the side die; the side die is a bamboo plywood board; and the side die is fixed by using a screw rod jack and a steel pipe support rack. The concrete is fed in a bin by using a concrete pump truck and is vibrated by a small-diameter plug-type vibrator. After the demolding of the crane beam, the concrete is cured through watering. The construction technology is convenient to construct and operate, the springing of the crane beam can be accurately controlled, the embedded parts are embedded accurately in position, and the prefabricated concrete crane beam is attractive in appearance.
Description
technical field [0001] The invention belongs to the field of industrial buildings, and in particular relates to a prefabricated construction technology of concrete crane beams. Background technique [0002] At present, most of the crane girders in thermal power plants and other industrial plants use prefabricated concrete crane girders. Conventional concrete crane girders are prefabricated using combined steel formwork, steel pipe frame support and tension screw rods to fix the combined steel formwork. The prefabricated concrete crane The appearance of the beam is not beautiful, the embedded parts on the concrete crane beam are not smooth, or the embedded parts cannot be found after the concrete crane beam is demoulded. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the current conventional prefabricated concrete crane beam technology, and provide a concrete crane beam prefabricated construction technology with lo...
Claims
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IPC IPC(8): B28B23/12B28B23/06
Inventor 刘六艺范开平王来所张宝忠缪买和郭振华马岚杨立峰王晓莉马社堂赵国庆陈香荣赵胜荣郑顺生赵青朱丽杨睿王康王涛许元
Owner SINOHYDRO BUREAU 14 CO LTD