Prefabrication device and prefabrication method of prefabricated beam shoe

Abstract

The invention provides a prefabrication device and prefabrication method of a prefabricated beam shoe. The method is achieved through the device which is characterized in that ball head joint bearing screws welded at the four corners of the bottom surface of a steel template are connected with internal thread sleeves fixed to the bottom of a beam shoe embedding groove of a box beam prefabrication pedestal; and the ball head joint bearings can incline by any angle in all directions, so that when the ball head joint bearing screws at the four corners extend and retract up and down, the steel template and the top surface of the pedestal can be driven to form vertical and horizontal gradients and sizes which meet the requirement of the beam shoe. According to the device, manufacturing and mounting can be carried out at the same time during pedestal construction, the device is applicable to the beam shoes with different vertical and horizontal gradient and size requirements during box beam prefabrication, an adjustment method is convenient to implement, and the size is reliable.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a prefabrication device and a prefabrication method for prefabricated beam boots. Background technique [0002] With the development of my country's economic construction, the number and scale of bridges and other infrastructure projects have grown rapidly. Among them, prefabricated beam technology has been widely used in roads at all levels, Widely used in railway and other projects. [0003] Prefabricated beams are usually designed with a "positive tilting" design. The beam shoe is actually a wedge-shaped block at the bottom of the beam, mainly to ensure that the contact part between the beam body and the support is horizontal. Because the bottom surface of the beam has certain longitudinal and transverse slopes, direct contact with the support will cause the support to bear a large horizontal force and cause excessive shear, so a beam shoe is set above the support a...

AI Technical Summary

Problems solved by technology

[0004] 1. It is inconvenient to adjust the thickness of the sand layer, the adjusted size is not completely accurate, and the size of different beam shoes needs to be adjusted repeatedly;

[0005] 2. The calculation of the thickness of the four corners of the beam shoe is relatively complicated and error-prone, and it is not as intuitive and reliable as the vertical and horizontal slope representation, which is not easy to check and review;

[0006] 3. The original beam shoe is covered by steel plates, steel bars, formwork, etc., which is not easy to check; if there is an error, the steel bars, formwork, etc. need to be removed, which is labor-intensive and time-consuming;

[0007] 4. The environment of the construction site is complex. Concrete slurry, curing water, oil and gas, etc. may cause local or overall subsidence of the sand layer, resulting in uneven bottom surfaces of beam boots or wrong vertical and horizontal slopes and dimensions. After the box girder is erected, the vertical and horizontal slopes do not meet the design requirements;

[0008] 5. The slope of the beam shoe cannot be checked and corrected in time: after the pouring is completed, the beam shoe is covered by the formwork, and the slope cannot be checked. Even if a problem is found, it is only when the beam body is erected, and the slope of the beam shoe cannot be corrected in time. It can stop the beam erection and wait for the processing of the wedge-shaped steel plate, which has a great impact on the construction period

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