Rapid modeling risk pre-assessment method for shield to pass through dense building group

Abstract

The invention belongs to the technical field of subway shields, and particularly relates to a rapid modeling risk pre-assessment method for a shield to pass through a dense building group. According to the evaluation method, based on limited element analysis software ABAQUS and three-dimensional modeling software GIS, the influence of tunnel excavation of an earth pressure balance shield tunneling machine on a surface building is simulated, and a shield tunneling construction scheme and a building reinforcement scheme are formulated by judging a risk level through a preset evaluation standard. According to the invention, the metrology and the three-dimensional modeling technology are combined, so that in the model building process, the earth surface structure meeting the precision requirement is rapidly built, and the time spent on safety calculation of a traditional building is greatly shortened. According to the invention, detailed risk level judgment standards are provided, preliminary construction scheme optimization ideas such as shield parameter adjustment or foundation reinforcement are provided for designers for different risk levels, and the designers are assisted in formulating and optimizing the construction scheme.

Description

technical field [0001] The invention belongs to the technical field of subway shield tunneling, and in particular relates to a risk pre-assessment method for shield tunneling through dense building groups that can be quickly modeled. Background technique [0002] Shield construction technology is often used in subway construction, but due to problems such as improper control of construction parameters and changes in site engineering geology, hydrogeology and geological conditions, shield construction is likely to cause excessive disturbance to the surrounding soil, causing deformation of the soil and deformation of the surface buildings or destroy. In order to solve this problem, when formulating a construction plan, it is usually necessary to carry out independent calculations for each building and take into account the influencing factors of surrounding buildings. For complex geological conditions, surrounding environment, and dense building groups, the calculation proces...

AI Technical Summary

Problems solved by technology

For complex geological conditions and surrounding environments, and dense building groups, the calculation process of this method is very cumbersome.

If the finite element method is used, although manual calculations can be reduced, it is difficult to break through the complex limitations of the modeling process for complex working conditions, so it is difficult to apply finite element analysis to engineering design

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