High-altitude measuring method for construction of crane beams
A measurement method and technology of crane girders, which are applied in the directions of measuring devices, measuring instruments, surveying and navigation, etc., can solve the problems of long longitudinal distance of crane girders, measurement errors, poor visibility, etc., and achieve high work efficiency and measurement line of sight Good results
Inactive Publication Date: 2014-09-10
WUHAN YIYE STEEL STRUCTURE
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Problems solved by technology
After the crane girder is installed, its position and top surface elevation should be measured and rechecked. Similarly, because the ground measurement line of sight is not good, reference objects should also be set on the crane girder. If there are many observation points, reference objects must be set at each place. Makes the measurement process complicated, not only inefficient but also prone to large errors
In addition, the construction site of this project is 1~2m higher than the steel column foundation, and there are still a large number of soil mounds on the construction site. The situation of the point will also bring measurement errors, causing the elevation and axis of the crane beam to exceed the allowable requirements of the specification
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[0020] Such as figure 1 As shown, vertical and horizontal axes (datum lines in the horizontal plane during ground measurement) are drawn on the steel column foundation 8, and the axis parallel to the crane beam 7 is called the longitudinal axis 11. For example, on the wall of a factory building) there is a ground measurement elevation datum 9. From the steel column foundation 8 upwards are the lower steel column 6, the corbel 1 and the upper steel column 2. Before installing the crane beam 7, the lower steel column 6, the corbel 1 and the upper steel column 2 have been installed in place, the elevation of the upper surface of the corbel 1 meets the installation requirements, and the installation error is only allowed to be negative, so that the crane beam 7 can be adjusted by the shim the top elevation of . Then enter the measurement and installation process of the crane beam 7, that is, the steps involved in the method of the present invention.
[0021] The high-altitude m...
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The invention relates to a high-altitude measuring method for construction of crane beams which are arranged on brackets with more than four in a row. The high-altitude measuring method for construction of crane beams is characterized in that the method comprises the following steps: (1) ground measurement is performed by virtue of a measurement instrument and a datum line which is needed for high-altitude measurement is drawn; (2) the measurement instrument is erected by virtue of a support at a middle bracket; (3) high-altitude measurement is performed and median axis datum lines of crane beams at other brackets are drawn; (4) the support and the measurement instrument are detached and the crane beams are lifted by aiming at the median axis datum lines; (5) step (2) is repeated; measurement is performed again and the top surface elevation and the horizontal position of the crane beams at all other brackets except the bracket which is used for erecting the measurement instrument are rechecked; (6) the support and the measurement instrument are transferred and installed and the crane beam at the bracket which is used for erecting the measurement instrument in step (5) is measured and rechecked. The method is characterized by high-altitude measurement, no restriction by ground condition, high efficiency, good measurement sight line and high working efficiency.
Description
technical field [0001] The invention belongs to the technical field of steel structure construction, and in particular relates to a high-altitude measurement method for crane beam construction. Background technique [0002] Guangxi Nannan Aluminum Processing Hot Rolling Plant Project is the first high-performance ultra-wide aluminum alloy plate processing and production plant in my country, and it is a national key project. The project covers an area of about 120,000 square meters, with a steel consumption of about 18,000 tons. The workshop is 658m long and consists of 6 workshops. There are 30 cranes in the workshop, and the maximum lifting capacity of the cranes is 200t. Whether the installation progress of the crane girder meets the design and specification requirements is one of the key points of this project. [0003] After the corbels and steel columns are installed, the crane girders are measured, set out, hoisted, and position corrected. In the past, ground measur...
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IPC IPC(8): G01C15/00
Inventor 单明严春光施汉华
Owner WUHAN YIYE STEEL STRUCTURE