A safety evaluation device and calculation method for tunnel lining based on fire scene

Abstract

The invention discloses a tunnel lining safety evaluation device and calculation method based on a fire scene. The evaluation device includes a tunnel basic data module, a fire scene simulation module, a lining fire characteristic module, a surrounding rock pressure calculation module, and a straight-rigid method program module. , Lining safety calculation module, the calculation steps are as follows: (1) The tunnel basic data module collects relevant data; (2) The fire scene simulation module simulates different fire scenarios; (3) The lining fire characteristic module obtains the mechanical properties of different parts, The surrounding rock pressure module is used to calculate the surrounding rock pressure; (4) the direct stiffness method program module is used to calculate the mechanical properties and internal forces of different parts; (5) the lining safety calculation module is used to calculate the corresponding safety factor. The invention provides a feasible calculation method for the safety analysis of different parts of the tunnel inner lining under different fire scenarios, and provides a theoretical basis for repairing the lining of the tunnel after fire.

Description

A safety evaluation device and calculation method for tunnel lining based on fire scene technical field The invention relates to a lining safety evaluation device and a calculation method under fire, and is particularly suitable for lining safety evaluation of different mileage and different parts of tunnels under different fire scenarios. Background technique At present, the number of tunnels and total mileage built in my country ranks first in the world, and a large number of tunnels are put into operation. The biggest problem of safety management in the operation stage is the safety management under fire. Since the 1990s, due to the rapid development of traffic tunnels, the increase of traffic speed and density, vehicle failures and collisions in tunnels, ignition and spontaneous combustion of goods, terrorism, arson and other reasons, whether it is a road tunnel or arson Several major fire accidents have occurred in railway tunnels, such as the British-French Channel T...

AI Technical Summary

Problems solved by technology

The lining will be damaged to varying degrees under fire. If the damage is too large and the safety is not satisfied, it will collapse. In addition, after the lining is damaged, how to formulate different treatment measures according to the degree of damage is also an urgent problem to be solved

The current research mainly focuses on the mechanical performance of the lining test block under fire, without considering the characteristics of fire propagation in the confined space of the tunnel

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