Full face tunnel boring machine tunneling extrusion deformation machine jamming disaster safety control method

Abstract

The invention relates to a full face tunnel boring machine tunneling extrusion deformation machine jamming disaster safety control method. The method includes the steps of evaluating the surrounding rock extrusion deformation levels of a full face tunnel boring machine in the tunneling process; and determining different-combination tunneling and step-by-step joint surrounding rock support strategies according to the different extrusion deformation levels. By means of the method, reasonable calculation of the surrounding rock extrusion deformation levels can be achieved, and construction site operation and calculation are facilitated; reasonable tunneling parameter adjustment and step-by-step joint surrounding rock support control are carried out according to the surrounding rock extrusiondeformation degrees, machine jamming is avoided under the surrounding rock deformation working condition, smooth tunneling is ensured, delay of the construction period due to frequent downtime is avoided, the tunneling efficiency is better improved, material and labor cost increase caused by excessive supporting is avoided, and project construction is more economical and reasonable; and a varietyof support methods are organically combined, the effects of strengthening and supporting surrounding rocks are effectively improved, the restoration and improvement of the stress state of the surrounding rocks are realized, the self-bearing capacity of the surrounding rocks is improved, and the construction safety is greatly improved.

Description

technical field [0001] The invention relates to the field of tunnel boring machine construction, in particular to a safety control method for a full-section tunnel boring machine tunneling, extrusion, deformation, jamming, and disaster. Background technique [0002] Full-section tunnel boring machines have been more and more widely used in tunnel engineering, but their adaptability to weak surrounding rock is poor. Deformation jam disasters lead to downtime and delays in the construction period, seriously restricting the efficiency of excavation. Adjustment of tunneling parameters and stability control of surrounding rock are the main measures to deal with large deformation of soft rock during tunneling, including reservation of deformation of surrounding rock, control of tunneling rate and support control. However, at present, there is no complete safety control method for the extrusion and deformation of weak surrounding rock at home and abroad, and the main problems are ...

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Problems solved by technology

[0006] Based on this, it is necessary to provide a safety control method for full-section tunnel boring machine excavation, extrusion, deformation and jamming disasters in view of the problem that the full-section tunnel boring machine is easy to be squeezed and deformed in the weak surrounding rock, causing jamming disasters, and it is difficult to excavate safely and efficiently.

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