Prediction method for original rock temperatures of high-ground-temperature tunnel under unexcavated condition

Abstract

The invention provides a prediction method for original rock temperatures of a high-ground-temperature tunnel under the unexcavated condition. According to the prediction method, a heating conductingeffect of different elevations and different ground surface temperatures, which are formed by geological evolution, a ground temperature gradient of stratum rocks and a rock temperature difference ofdifferent points is utilized; the original rock temperature of each measured point in a corresponding range of the high-ground-temperature tunnel is relatively accurately calculated under the assistance of two independent development formulas; a problem of inaccurate prediction of a conventional method is solved; by an original rock temperature distribution diagram, heat damage prevention measurescan be taken in advance; the labor hygiene requirement of an operator is met; technical support is provided for heat damage governance and scientific construction of the high-ground-temperature tunnel; and safe and rapid construction of the high-ground-temperature tunnel is ensured.

Description

technical field [0001] The invention belongs to the technical field of tunnel original rock temperature prediction, and in particular relates to a method for predicting the original rock temperature of a high ground temperature tunnel without excavation. Background technique [0002] In the construction of high ground temperature tunnels, the high temperature heat damage in the tunnel not only deteriorates the working environment, reduces labor efficiency, but even endangers the health of workers and causes safety accidents. Therefore, it is necessary to determine the source and temperature of heat damage in the treatment of high-temperature heat damage in the tunnel, so that corresponding cooling measures can be taken during construction to ensure that the ambient temperature in the tunnel meets the operating standards required by the regulations, and lay the foundation for safe and rapid tunnel construction. [0003] The heat dissipation of surrounding rock is one of the m...

AI Technical Summary

Problems solved by technology

Due to the limitation of the number of boreholes and the influence of surface valleys and peaks, the original surrounding rock temperature of the high-temperature tunnel under the condition of no excavation predicted by the direct connection has obvious particularity, and cannot accurately reflect the original surrounding rock temperature within the corresponding range of the tunnel. rock temperature

Especially after the excavation of the tunnel was revealed, the inaccurate prediction of the original rock temperature caused the high temperature heat damage in the tunnel, and it was necessary to stop work and take measures to deal with the heat damage, which affected the construction period of the tunnel