Construction method for controlling overexcavation and underexcavation of slate tunnel based on BIM5D technology

Abstract

The invention discloses a construction method for controlling overexcavation and underexcavation of a slate tunnel based on the BIM5D technology. According to the method, a tunnel BIM5D information model is adopted for pre-controlling the workload of the slate tunnel, a 3D laser scanner is utilized for conducting non-contact quick scanning on an actual tunnel, scanning data is transmitted to a tunnel BIM5D platform in real time through the Internet for comparison, through the condition comparison result of current cyclical footage, blasting hole spacing and other construction parameters of next cyclical footage are adjusted, so that the contour line of each cycle is close to the set value of the tunnel BIM5D information model, and thus the purpose of controlling the overexcavation and underexcavation of the slate tunnel is achieved. Therefore, the construction method has the advantages that real data of the tunnel is accurately restored, and is transmitted in real time, the differencecomparison between the project quantity and progress is precise, and each cyclical footage is convenient to control. The construction method furthermore has the advantages that the construction methodis safe, reliable, simple in technology, high in on-spot using efficiency, and low in labor intensity, and floor occupation does not occur.

Description

technical field [0001] The invention relates to a construction method for over- and under-excavation control of a slate tunnel based on BIM5D technology, and belongs to the technical field of tunnel construction. Background technique [0002] Slate refers to a rock with a plate structure and no recrystallization. It is a metamorphic rock. The original rock is argillaceous, silty or neutral tuff, which can be peeled into thin slices along the direction of the plate. During tunnel construction, it is very easy to cause over-excavation and under-excavation. In Qiandongnan Miao and Dong Autonomous Prefecture of Guizhou Province, Tongren and other places, due to the characteristics of karst geology and geomorphology, there are many tunnels in Class IV and V slate surrounding rocks. Due to its flaky joint structure, slate is prone to landslides during construction, swelling and weathering when exposed to water, and difficult pre-grouting reinforcement, especially has a significan...

AI Technical Summary

Problems solved by technology

The main manifestations are: before drilling and blasting, it is difficult to control the blasthole spacing; after drilling and blasting, the vertical slate surrounding rock joints are prone to under-excavation, while the parallel slate surrounding rock joints are prone to serious over-excavation; The oversquare amount is about 52% (including springback), accounting for about 10% of the total tunnel cost; the rework caused by under-excavation and the increased workload of over-excavation have a direct impact on the progress

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