Shield interval evacuation platform pre-assembly method based on BIM technology

Abstract

The invention discloses a shield interval evacuation platform pre-assembly method based on a BIM technology. The shield interval evacuation platform pre-assembly method comprises the steps of generating a tunnel model in the evacuation platform construction stage through BIM modeling, generating a three-dimensional line center line based on the tunnel model, generating footpath plates, supports and handrails in the tunnel model along the center line, obtaining a profile at every support placement points, exporting a two-dimensional graph corresponding to the profile, namely a profile graph atthe support placement point, acquiring prefabricated information of the footpath plates and the supports meeting limit requirements based on the profile of the support placement points, and performingcollision inspection on support anchor bolts, handrail anchor bolts, hand holes and other duct piece structures. According to the method, the prefabricated information, meeting the limit requirements, of the footpath plates and the supports can be rapidly obtained, collision inspection of the supports and the handrails versus the hand holes, circular seams and longitudinal seams can be conductedin advance, and the problems that in traditional evacuation platform installation engineering, positioning information is inaccurate, the prefabricated information collection efficiency is low, and collision situation cannot be pre-judged are solved.

Description

technical field [0001] The invention relates to the field of tunnel engineering, in particular to a method for pre-assembling an evacuation platform in a shield section based on BIM technology. Background technique [0002] The evacuation platform is used as a special evacuation channel in the tunnel of the subway section, and its installation and prefabrication process is generally carried out along with the laying of the track. At present, the installation steps of the evacuation platform mainly include determining the starting point, positioning the bracket, retesting the bracket, positioning the handrail, pre-embedding the anchor bolt, installing the bracket, installing the walkway board, and installing the handrail. Inaccurate positioning information, low collection efficiency and other disadvantages; secondly, the installation process of the evacuation platform lags behind the track laying, which further leads to slow acquisition of prefabrication information for brack...

AI Technical Summary

Problems solved by technology

At present, the installation steps of the evacuation platform mainly include determining the starting point, bracket positioning, bracket retesting, handrail positioning, anchor bolt pre-embedding, bracket installation, walkway board installation and handrail installation. First, the positioning information is mainly collected by manual operation machines. Inaccurate positioning information, low collection efficiency and other disadvantages; secondly, the installation process of the evacuation platform lags behind the track laying, which further leads to slow acquisition of prefabrication information for brackets and walkway slabs, which reduces the prefabrication efficiency; finally, during the installation process, frequent There is no way to predict in advance that there are conflicts between bracket anchor bolts, handrail anchor bolts and hand holes, circular seams, and longitudinal seams

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