Device and method for testing fire behavior of urban underground utility tunnel structure

Abstract

The invention relates to a device and a method for testing a fire behavior of an urban underground utility tunnel structure, and belongs to the field of urban underground utility tunnel structure firebehavior tests. The device comprises a utility tunnel test piece, a counterforce device, a vertical jack, a horizontal jack, a heating connecting device, an electric heating plate and a high-temperature-resistant camera shooting device, wherein the real load environment of the interior of a pipe gallery caused by fire can be simulated, and the vertical jack applies a vertical load to simulate anearth load effect of a top plate; the horizontal jack applies a horizontal load to wallboards on the two sides in order to simulate a soil pressure effect of the wallboards on the two sides of the pipe gallery; the electric heating plate and the heating connecting device transmit a fire load into the pipe gallery in order to simulate a real fire effect; the high-temperature-resistant camera shooting device capable of rotating freely is arranged in the pipe gallery, and the damage phenomenon of the inside concrete under the action of the fire is observed. According to the device and the method,whole-process test research on the fire behavior of the pipe gallery structure can be carried out, the bearing capacity and the fire resistance of the pipe gallery structure can be checked, and deepresearch can be carried out on the structure bearing safety under the fire behavior of the pipe gallery structure.

Description

technical field [0001] The invention belongs to the field of fire behavior test of urban underground comprehensive pipe gallery structure, and in particular relates to a fire behavior test device and test method of urban underground comprehensive pipe gallery structure. Background technique [0002] The urban underground comprehensive pipe gallery is a modern and intensive urban lifeline infrastructure formed by concentrating two or more lifeline projects such as gas, electricity, telecommunications, water supply and drainage in the same artificial space. Its internal wire short circuit, gas leakage, accidental ignition during maintenance, electrothermal effect, etc. will cause fires, increase the temperature of the pipe gallery structure, and reduce the carrying capacity. When the temperature rises to a certain level, the pipe gallery structure will fail and cause great harm. . As my country's pipe gallery construction enters a stage of rapid development, the experimental ...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in view of the problem existing in the current experimental research method that it is impossible to carry out the joint coupling effect test of the pipe gallery structure force and high temperature at the same time, the present invention provides a fire behavior test device for the urban underground comprehensive pipe gallery structure and test method

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