A method for early warning and forecasting of dangerous situations in the process of pipe jacking and passing through existing box culverts

Abstract

The invention relates to a method for early warning and forecasting of dangerous situations in the process of pipe jacking down through an existing box culvert, comprising: 1. collecting various characteristic parameter data of the existing box culvert and its surrounding soil through a monitoring device; 2. collecting the collected data Carry out formatting processing; 3. Use the binary displacement ratio method to invert the soil strength in the disturbed area; 4. Obtain the weight and gray value of various characteristic parameters and the soil strength in the disturbed area affecting the box culvert safety factor through the gray correlation degree method of AHP Relevance; 5. Establish a long-short-term memory cycle neural network model to predict the time of damage to existing box culverts; 6. Use the Kalman filter method to predict the time of damage to existing box culverts; 7. Combine the prediction results of steps 5 and 6 , to carry out early warning and forecasting of dangerous situations before the predicted time of critical damage. Compared with the prior art, the present invention can quantitatively, more reasonably and more realistically carry out the early warning and prediction of the dangerous situation of the pipe jacking and passing through the existing box culvert.

Description

technical field [0001] The invention relates to the technical field of disaster early warning and forecasting for pipe jacking projects, in particular to a method for early warning and forecasting of dangerous situations in the process of pipe jacking and passing through existing box culverts. Background technique [0002] In recent years, with the vigorous development of urban rail transit and the improvement of tunnel excavation technology, the application of pipe jacking method in municipal engineering in soft soil areas such as Shanghai has become more and more extensive, covering double-layer tunnels, pedestrian tunnels crossing streets, and subway stations. In many projects such as the communication channel of import and export, the common ditch of urban underground pipelines, water diversion and drainage pipelines, etc. Although compared with the circular section, the effective use area of ​​the rectangular section is usually more than 20%. Pipe jacking construction ...

AI Technical Summary

Problems solved by technology

Among them, there are rare literature reports on the prediction of the time of catastrophic danger during the construction process of pipe jacking under existing buildings and structures, and the existing research results are difficult to accurately evaluate the construction process of pipe jacking under existing sewage tank culverts. However, it is impossible to fully consider the influencing factors (such as multi-layer stratum conditions, lining forms, construction conditions, etc.) that lead to the failure risk of box culvert underpassing and jacking, and the soil and structures during the construction of underpassing and jacking (roofing pipes, underground pipelines)

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