Shield utilization rate prediction and operation parameter optimization method and system based on SVR and PSO

Abstract

The invention provides a shield utilization rate prediction and operation parameter optimization method and system based on SVR and PSO. The method comprises the following steps of 1, screening load and operation parameters from machine operation data, and preprocessing the screened data; 2, constructing a data set by using the preprocessed data, the geological type and the utilization rate of each ring, and dividing the data set; 3, establishing a shield utilization rate prediction model by using the SVR and the data set; 4, constructing an optimization equation with the maximum construction progress as a target and operation parameter changes, load changes and geological types as constraint conditions; and 5, obtaining optimal operation parameters under a specific geological type by using an equation established by PSO optimization, so that the construction progress is maximum. According to the method, the utilization rate can be accurately predicted, shield operation can be optimized, safe and rapid tunneling can be achieved, and good engineering application value is achieved.

Description

technical field [0001] The present invention relates to the technical field of shield tunnel utilization prediction and operation parameter optimization, in particular to a shield tunnel utilization prediction and operation parameter optimization method and system based on SVR and PSO. Background technique [0002] Tunnel excavation by the shield method has the advantages of fast excavation speed, high construction quality, and little disturbance to the surrounding rock and soil, so it has been more and more used in the development of urban underground space. There are four performance parameters for TBMs, which are net advance speed, utilization rate, construction progress and tool life. Among them, the net excavation speed indicates the advancing speed of the machine when it is in the excavation state, the utilization rate indicates the percentage of shield tunneling time to the total shift time, the construction progress is the product of the net excavation speed and the ...

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Problems solved by technology

However, the existing research either estimates the construction period and cost or selects the equipment by establishing a model or estimating the utilization rate in the tunnel planning stage, or puts forward some constructive suggestions for on-site construction management to improve the utilization rate. However, there is no in-depth study on how to predict the utilization rate in real time and optimize the driver's operation to improve the construction progress of shield tunneling under the existing geological conditions, equipment specifications, construction management level, and muck transportation.

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