Segmental prefabrication method of box girder with short-line method based on bim

Abstract

The invention discloses a BIM-based short-line method box girder section prefabrication method, 1, using the Bentley modeling platform to build a BIM design model of the box girder as a whole and a box girder section; 2, building the completed BIM design model for The layout of the prefabrication plant is simulated by the BIM model; 3. The prefabricated steel cage of the box girder segment by the short-line method; 4. When the box girder segment is prefabricated by the short-line method, one of the end forms is fixed, and the bottom form is read by reading the initial box girder The segmental BIM design model is adjusted and fixed with the bottom form trolley; 5. During the prefabrication process of the box girder segment, the spraying maintenance equipment is dynamically controlled and adjusted through the control system; 6. Before the concrete of the cast-in-place box girder segment is solidified , install control points for plane precision control and standard high precision control; 7, use the prefabricated last box girder segment as a floating end form, and obtain the linear compensation value of this box girder segment; 8, repeat step 3‑ 7. Complete the prefabrication of all box girder segments. The invention guarantees the safety, reliability and economy of the project.

Description

technical field [0001] The invention relates to a bidet, in particular to a BIM-based method for prefabricating a box girder section with a short line method. Background technique [0002] There are currently two common methods for the prefabrication of box girder segments in highway engineering: the long-line method and the short-line method. The long-line method requires less equipment, and the segment alignment control is relatively simple during prefabrication, but it is only suitable for bridges with consistent alignment of each span and no horizontal curve, and has the disadvantage of low utilization rate of the bottom membrane. The production period of the short-line legal girder is short, and it is suitable for bridges with various spans, especially multi-span long bridges with a large number of box girder segments and bridges with horizontal curves. However, due to the short-line method, the bottom formwork is short, so the position deviation of the bottom formwork...

AI Technical Summary

Problems solved by technology

The short-line method requires computer-assisted real-time dynamic control of alignment and error, and it is difficult to control the accuracy and error during the prefabrication process of box girder segments

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