A construction method for precasting bridge segments by adopting a short-line method

Abstract

The invention relates to a construction method for precasting bridge segments by adopting a short-line method, which includes the trolleys, Hydraulic pedestals and control towers in the prefabricationplant; A plurality of numerical control implantation points are arranged on each prefabricated segment, A base is mounted at each numerically controlled implantation point, A position controller is arranged at the top of each base, and the distance and inclination of the control points are directly converted into the coordinate values under the local coordinate system through the interaction of the position information of each module of the position controller and the control system of the control tower, and then the correction error is calculated through the control system, so as to directlycorrect the deviation of the template system. Compared with surveying and mapping equipment such as the total station, surveying towers and levellers commonly used in the prior art, -The applicationdoes not require tedious measuring equipment, saves the human cost required for surveying and mapping, and only one staff member is required to stand at the control tower in the whole working processand operate the control system, so that the automatic deviation correction of the segments can be realized, and the measuring accuracy is guaranteed, and the production efficiency is effectively improved.

Description

technical field [0001] The invention relates to a construction method in the field of bridges, in particular to a construction method for prefabricating bridge segments using a short-line method. Background technique [0002] Segmental prefabrication and assembly technology is to divide the beam body into several sections in the longitudinal direction, prefabricate in the factory or at the construction site according to the predetermined design plan, erect the sections in place and then stretch the prestressed steel beams to assemble each section into a Complete beam body. There is no ordinary steel bar between the segments, and the shear force between the segments is transmitted through the inlaid shear key and part of the prestressed steel beam. [0003] The currently commonly used segmental prefabrication methods are nothing more than long-line method and short-line method. Compared with the long-line method, the short-line method is developed later, because it has the a...

AI Technical Summary

Problems solved by technology

These errors will affect the matching and manufacturing of subsequent segments. If the deviation is not corrected in time, errors will accumulate, making the geometric alignment of the whole bridge deviate too much from the design alignment, causing potential safety hazards and affecting normal operation of the bridge.

The existing error correction methods are nothing more than direct correction and step-by-step correction. These two correction methods require the use of conventional surveying and mapping equipment such as total stations, measuring towers, and levels. In the process of correcting deviations, a large number of Construction personnel operate the above-mentioned surveying and mapping equipment, and these construction personnel must have a strong professional level. Therefore, the existing surveying and mapping correction method not only wastes a large labor cost, but also has low measurement efficiency.

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