Stress-strain digital data processing method for reinforcing tunnel face of broken and weak surrounding rock

Abstract

The invention provides a stress-strain digital data processing method for a reinforcing tunnel face of a broken and weak surrounding rock, which comprises the following steps: S100, establishing a three-dimensional model of a broken weak surrounding rock tunnel face according to project design, and carrying out virtual finite element segmentation to form a three-dimensional finite element model of the tunnel face; S200, in the section excavation process, detecting and storing basic data of the surrounding rock tunnel face; S300, performing stress-strain analysis on the tunnel face in combination with the basic data and the three-dimensional finite element model, and predicting the bonding repair demand strength of the surrounding rock tunnel face by adopting a preset algorithm; and S400, selecting a surrounding rock tunnel face reinforcement measure according to the bonding and repairing demand strength, and introducing the reinforcement measure into the three-dimensional finite element model for effectiveness analysis. The method can improve the analysis efficiency and effectiveness of the broken weak surrounding rock tunnel face reinforcement stress-strain data, improves the analysis precision, is used for guiding surrounding rock reinforcement, can guarantee the reinforcement effect, avoids the reinforcement failure, and controls the surrounding rock reinforcement cost.

Description

technical field [0001] The invention relates to the technical field of surrounding rock reinforcement stress data processing, in particular to a digital data processing method for stress and strain reinforcement of broken and weak surrounding rock faces. Background technique [0002] In the tunnel construction under the geological condition of broken and weak surrounding rock, one of the most prominent problems in the construction process of the tunnel with weak surrounding rock is the stability of the tunnel face. In order to maintain the stability of the tunnel face, it is often necessary to strengthen the tunnel face. However, if the reinforcement measures are not in place, it will not only endanger the construction safety, but even affect the operation safety. The reinforcement method can adopt advanced pre-reinforcement technology, use pipe shed and / or anchor rods, improve the strength of broken and weak strata and the stability of surrounding rock, and ensure safety. ...

AI Technical Summary

Problems solved by technology

[0003] However, the reinforcement effect of the face of the surrounding rock requires data support. At present, the analysis of the stress-strain data of the face of the surrounding rock is often done manually and judged, which is time-consuming and laborious, and it is difficult to guarantee the correctness of the calculation results. The accuracy of the stress-strain analysis of surrounding rock reinforcement will cause adverse consequences of reducing the reinforcement effect and affecting the stability of the face

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