Cable support tower steel anchor box mounting gradient adjusting method and steel anchor box with gradient adjusting cushion block

Abstract

The invention discloses an installation gradient adjusting method for cable tower steel anchor cases and steel anchor cases having gradient adjusting blocks. The method comprising following steps: installing the steel anchor cases in batches, detecting installation accuracy of the batch of steel anchor cases, connecting inclination adjusting backing plates on the batch of steel anchor cases, the next batch of steel anchor cases are connected and installed on the gradient adjusting backing plates; detecting the installation accuracy of the next batch of steel anchor case, connecting gradient adjusting backing pads again, and installing the third batch of steel anchor cases; constructing repetitively until the designed height is implemented. The invented method adjusts installation gradient of the steel anchor case by using gradient adjusting backing plates, the operation thereof is simple, and the invented method is provided with practicality, economy, high efficiency and low working intensity. Installation accuracy is improved greatly, and technique of large scale structure installation is improved. At the same time, project period is shortened and cost is lowered. The invented method is suitable for diversified anchor towel steel anchor case installation, especially for anchor towel steel anchor case installation of large scale cable-stayed bridges.

Description

technical field [0001] The invention belongs to the installation and construction technology of a steel anchor box for a cable tower, and in particular relates to a method for adjusting the installation inclination of a steel anchor box for a cable tower. Background technique [0002] The steel anchor box structure is used in the anchorage area of ​​the cable-stayed cable on the cable-stayed tower-type bridge, and the 4th to 34th pair of cable-stayed cables are anchored on the steel anchor box. That is, the accuracy of the steel anchor box will directly affect the alignment control and structural force of the main bridge, so measures must be taken to control and correct the deviation. [0003] The accuracy of the steel anchor box is controlled in the whole process. Although many measures have been taken to control the sections of the steel anchor box before installation, that is: through calculation and analysis to determine the manufacturing size and theoretical installatio...

AI Technical Summary

Problems solved by technology

[0003] The accuracy of the steel anchor box is controlled in the whole process. Although many measures have been taken to control the sections of the steel anchor box before installation, that is: through calculation and analysis to determine the manufacturing size and theoretical installation position of the section, through accurate measurement and pre-assembly control Manufacturing accuracy, and the installation of the first steel anchor box (reference section) has been precisely positioned to achieve high precision, but the error cannot be absolutely eliminated. With the increase of the installation height on site, the cumulative increase of the inclination error (plane The deviation generated by the position is reflected in the inclination error, controlling and adjusting the inclination, which also controls the plane position of the anchor point of the cable stay), and will exceed the allowable value

According to conventional thinking, when these errors occur, the workpiece is usually transported back to the factory, and the installation surface is re-machined to meet the installation requirements. However, the steel anchor box structure is relatively large, and transportation and machining are extremely inconvenient. One week, this will inevitably affect the construction progress and increase the cost

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