CN114783265A - Underground structure secondary fire simulation test device based on vibrating table simulation earthquake load - Google Patents
Underground structure secondary fire simulation test device based on vibrating table simulation earthquake load Download PDFInfo
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Abstract
The invention discloses a vibrating table-based simulation test device for simulating secondary fire of an underground structure under an earthquake load, which comprises a vibrating table and a model box, wherein the model box is arranged above the vibrating table, the underground structure is simulated in the model box, the underground structure comprises an underground building area and an underground pipe gallery area, the underground pipe gallery area comprises a soil layer and a tunnel model embedded in the soil layer, a plurality of groups of first fire simulation assemblies are embedded in the tunnel model, a plurality of groups of second fire simulation assemblies are embedded in the soil layer, the underground building area is provided with a plurality of third fire simulation fire sources, at least one controller is embedded in the underground pipe gallery area, the controller is connected with an external power supply, and the first fire simulation assemblies, the second fire simulation assemblies and the third fire simulation fire sources are respectively connected with controller leads. The test device simulates the influence of earthquake through the vibrating table, and simulates the states of secondary fire and fire spreading under the influence of earthquake.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to a simulation test device for simulating secondary fire of an underground structure under earthquake load based on a vibrating table.
Background
The 21 st century is recognized as a century of underground space, which has been developed and utilized on a large scale. Underground structures become important components of urban disaster prevention and reduction. Therefore, the safety of the underground structure itself during service is of concern. At present, relatively more researches are carried out on the safety of underground structures under the action of single factors (such as earthquake, fire, flood and the like), but relatively less attention is paid to the safety under the action of multi-factor coupling. The damage or destruction of an underground structure caused by a strong earthquake easily causes pipeline breakage and the like, thereby causing secondary disasters such as fire disasters and the like, and the damage caused by the secondary disaster of the earthquake is far more serious than the damage caused by the earthquake per se through the earthquake damage investigation of the past major earthquake. Therefore, it is necessary to pay attention to the impact of the secondary disaster caused by the earthquake.
Disclosure of Invention
In view of the defects in the prior art, the technical problem to be solved by the invention is to provide a simulation test device for simulating the secondary fire of an underground structure under the earthquake load based on a vibrating table, which realizes the coupling effect with the earthquake load.
The invention is completed by adopting the following technical scheme: the utility model provides a secondary fire analogue test device of underground structure under load based on shaking table simulation earthquake, includes shaking table and mold box, the shaking table top is arranged in to the mold box, the inside simulation underground structure of mold box, underground structure includes underground structure region and underground pipe gallery region, underground pipe gallery region includes the soil layer and buries underground soil intraformational tunnel model, the first conflagration analog component of multiunit is buried underground to the tunnel model, bury multiunit second conflagration analog component underground in the soil layer, underground structure region is provided with a plurality of third conflagration simulation sources of fire, bury at least one controller underground in the underground pipe gallery region, the controller is connected with external power supply, first conflagration analog component, second conflagration analog component and third simulation sources of fire are connected with the controller wire respectively.
Furthermore, the first fire simulation component is a first simulated fire source, the second fire simulation component is a second simulated fire source, and each simulated fire source is connected with the controller respectively.
Further, according to the implementation method of the simulation test device for simulating the secondary fire of the underground structure under the earthquake load based on the vibrating table, the earthquake load is simulated through the vibrating table, the earthquake sensor is arranged in the controller, when the vibrating table starts to work, the earthquake sensor in the controller receives a signal, the controller starts to work to control the start of the simulated fire source, and the step of starting the simulated fire source to simulate the secondary fire by the controller is as follows:
1) the controller controls a first simulated fire source in one of the first fire simulation components to start to work, and the first started simulated fire source is taken as a fire ignition point;
2) the controller sequentially sends instructions to the adjacent first simulated fire sources according to a certain time interval, the adjacent first simulated fire sources are sequentially started until the first simulated fire sources of all the first fire simulation assemblies are started, and the condition that the fire point is used as a starting point to spread to the adjacent first simulated fire sources on two sides is simulated.
3) After the first simulated fire sources of all the first fire simulation assemblies are started, the controller sends instructions to the second simulated fire source and the third simulated fire source of the second fire simulation assembly respectively, and the second simulated fire source and the third simulated fire source which are closest to the first simulated fire source are started at last.
4) The controller sends instructions to the adjacent second simulated fire sources in sequence by taking the first started second simulated fire source as a starting point at a certain time interval until all the second simulated fire sources are started, and simultaneously the controller sends instructions to the adjacent third simulated fire sources in sequence by taking the first started third simulated fire source as a starting point at a certain time interval until all the third simulated fire sources are started.
Furthermore, each group of first fire simulation assemblies comprises a first simulation fire source, a pipeline fracture signal collector, a first temperature sensing device and a first smoke generation device, wherein the first simulation fire source, the pipeline fracture signal collector, the first temperature sensing device and the first smoke generation device are arranged in a one-to-one correspondence manner, the pipeline fracture signal collector is distributed on the pipe wall of the pipeline, and the first simulation fire source, the pipeline fracture signal collector, the first temperature sensing device and the first smoke generation device are respectively electrically connected with the controller.
Furthermore, the second fire disaster assembly comprises a second simulated fire disaster, a second temperature sensing device and a second smoke generating device, the second simulated fire disaster, the second temperature sensing device and the second smoke generating device are respectively connected with the controller, after the first temperature sensing device in the first fire disaster assembly closest to the second fire disaster assembly reaches the specified temperature, an instruction is issued to the second fire disaster assembly through the controller, and the second simulated fire disaster in the second fire disaster assembly starts to work.
Furthermore, the underground building area is a simulated subway station and comprises a simulated platform, a wall surface and a track area, the second fire disaster assembly is located below the track area, a plurality of third simulated fire sources are distributed on the wall surface and the simulated platform, and the third simulated fire sources are respectively connected with the controller.
Further, the first simulated fire source and the second simulated fire source are ignition sources, the ignition sources are realized by adopting heaters, the third simulated fire source is an ignition source or a surface fire source, and the surface fire source adopts a heating net piece.
Furthermore, a plurality of LED prompting lamps are arranged on the inner wall of the model box, and the LED prompting lamps are respectively connected with the first simulated fire source, the second simulated fire source and the third simulated fire source through leads and are in one-to-one correspondence.
The implementation method of the underground structure secondary fire simulation test device based on the vibrating table to simulate the seismic load comprises the following steps of simulating the seismic load through the vibrating table, controlling the simulated fire source to start by the controller, controlling the simulated fire source to start and simulating the secondary fire by the controller,
1) the pipeline fracture signal collector at the pipeline fracture position caused by the earthquake collects pipeline fracture signals and transmits the signals to the controller;
2) the controller sends an instruction to a first simulated fire source corresponding to the pipeline fracture after receiving the signal, and starts a corresponding first simulated fire source which simulates a first fire ignition point;
3) the corresponding first temperature sensing device monitors the temperature of the first simulated fire source, and when the first temperature sensing device monitors that the temperature reaches a specified temperature, a temperature signal is transmitted to the controller;
4) the controller sends an instruction to the first smoke generating device, starts the corresponding first smoke generating device and simulates the smoke condition of a secondary fire;
5) the controller sends an instruction to the corresponding first smoke generating device, and simultaneously sends an instruction to the first simulated fire sources of the adjacent first fire assemblies on two sides, and the first simulated fire sources on two adjacent sides are started to simulate the outward spreading condition of the fire points of the first fire;
6) the controller sequentially controls the first simulated fire sources to start, when the corresponding first temperature sensing devices monitor the specified temperature, the controller sends instructions to the corresponding smoke generators and the adjacent first simulated fire sources, starts the corresponding smoke generators and the adjacent first simulated fire sources to work, and repeats the steps until all the first simulated fire sources start;
7) when a first simulated fire source closest to a second simulated fire source is started, a corresponding first temperature sensing device monitors that the temperature reaches a specified temperature, signals are transmitted to a controller, the controller sends an instruction to a corresponding first smoke generator and starts the corresponding first smoke generator, and simultaneously sends an instruction to the first simulated fire sources on two adjacent sides and a second simulated fire source closest to the first simulated fire sources on the two adjacent sides, the first simulated fire sources on the two adjacent sides and the second simulated fire source closest to the first simulated fire sources are started, and the condition that fire spreads to a second fire component is simulated;
after the first second simulated fire source is started and the corresponding second temperature sensing device monitors the specified temperature, the controller sends out an instruction to the corresponding second smoke generator and the adjacent second simulated fire source, the corresponding second smoke generator and the adjacent second simulated fire source are started, and the steps are repeated until all the second simulated fire sources are started;
8) when the first simulated fire source closest to the third simulated fire source is started and reaches the specified temperature, the controller sends an instruction to the adjacent first simulated fire source, and simultaneously sends an instruction to the third simulated fire source closest to the third simulated fire source and starts the third simulated fire source until all the first simulated fire source, the second simulated fire source and the third simulated fire source are started.
Further, the temperature sensing means includes a temperature sensor or a thermocouple probe.
In the invention, secondary disasters such as fire disasters and the like are caused by pipeline breakage and the like due to damage or destruction of an underground structure caused by a strong earthquake, the earthquake is simulated through the vibrating table, the fire source is simulated to simulate a secondary fire disaster, the controller controls different ignition parts and ignition time, and the real coupling effect of the earthquake and the fire disasters is achieved. The environment of secondary fire of underground structures under the action of earthquake is simulated, and the environment of fire spreading under earthquake load is reflected.
Drawings
The invention has the following drawings:
FIG. 1 is an external structure schematic diagram of a simulation test device for simulating secondary fire of an underground structure under earthquake load based on a vibrating table;
FIG. 2 is a schematic diagram of the internal structure of a simulation test device for simulating secondary fire of an underground structure under earthquake load based on a vibrating table in the first embodiment;
FIG. 3 is a schematic flow chart of a simulation test device for simulating secondary fire of an underground structure under earthquake load based on a vibrating table according to a first embodiment;
FIG. 4 is a schematic diagram of the internal structure of a simulation test device for simulating secondary fire of an underground structure under earthquake load based on a vibrating table according to a second embodiment;
FIG. 5 is a schematic flow chart of a simulation test device for simulating secondary fire of an underground structure under earthquake load based on a vibrating table according to a second embodiment;
FIG. 6 is another schematic flow chart of a simulation test device for simulating secondary fire of an underground structure under earthquake load based on a vibrating table according to the second embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments in the patent of the invention without any inventive work belong to the protection scope of the patent of the invention.
Referring to fig. 1-3, a first embodiment of the invention provides a simulation test device for simulating an underground structure secondary fire under an earthquake load based on a vibrating table, which comprises a vibrating table 1 and a model box 2, wherein the model box 2 is made of fireproof glass. The model box 2 is arranged above the vibration table, and earthquake load is simulated through the vibration table 1. Inside underground structure that sets up of model box 2, underground structure includes underground building region 3 and underground pipe gallery region 4, underground pipe gallery region 4 includes soil body layer 5 and buries underground soil body intraformational tunnel model 6. Tunnel model 6 buries multiunit first conflagration simulation subassembly underground, and first conflagration simulation subassembly can locate tunnel model inside or outer wall department, bury multiunit second conflagration simulation subassembly underground in the soil horizon 6, underground building region is provided with a plurality of third conflagration simulation sources of a fire. At least one controller 7 is buried in the soil body, the controller 7 is connected with an external power supply, and the first fire simulation assembly, the second fire simulation assembly and the third fire simulation fire source are respectively connected with the controller 7 through leads. The optimal scheme is that the number of the controllers is the same as that of the tunnel models, namely one controller is configured for one tunnel model, and two controllers are configured for two tunnel models.
The first fire simulation component is a first simulated fire source 8, the second fire simulation component is a second simulated fire source 9, and each simulated fire source is connected with the controller 7. The first simulated fire source 8 and the second simulated fire source 9 are ignition sources, and the ignition sources can be realized by adopting heaters.
The underground building area 3 is a simulated subway station and comprises a simulated platform 10, a wall surface 11 and a track area 12, the second fire disaster assembly is located below the track area 12, a plurality of third simulated fire sources 13 are distributed on the wall surface 11 and the simulated platform, and the third simulated fire sources 13 are respectively connected with the controller 7. The third simulated fire source 13 is an ignition source or a surface fire source, and the surface fire source adopts a heating net sheet.
In the invention, the shaking table is used for simulating earthquake load, the underground structure pipeline is broken due to earthquake, and the like, so as to cause secondary fire, the earthquake sensor 20 is arranged in the controller, when the shaking table starts to work, the earthquake sensor in the controller receives signals, and the controller starts to work to control the simulated fire source to start.
The steps of the controller controlling the simulated fire source to start the simulated secondary fire in the first embodiment are as follows:
1) the controller controls a first simulated fire source in one of the first fire simulation components to start to work;
2) and taking the first simulated fire source started first as a starting point, the controller sequentially sends instructions to the adjacent first simulated fire sources according to a certain time interval, and the adjacent first simulated fire sources are sequentially started until the first simulated fire sources of all the first fire simulation assemblies are started. And simulating the situation that one fire point is taken as a starting point and the fire source spreads to the adjacent first simulated fire sources at two sides.
3) After the first simulated fire sources of all the first fire simulation assemblies are started, the controller respectively sends out instructions to the second simulated fire source and the third simulated fire source of the second fire simulation assembly, and the second simulated fire source and the third simulated fire source which are closest to the first simulated fire source are started.
4) And the controller sequentially sends instructions to the adjacent second simulated fire sources by taking the first started second simulated fire source as a starting point at a certain time interval until all the second simulated fire sources are started. And meanwhile, the controller sequentially sends instructions to the adjacent third simulated fire sources by taking the first started third simulated fire source as a starting point at a certain time interval until all the third simulated fire sources are started.
A plurality of LED prompting lamps 14 are arranged on the inner wall of the model box, and the LED prompting lamps 14 are respectively connected with the first simulated fire source 8, the second simulated fire source 9 and the third simulated fire source 13 through leads and are in one-to-one correspondence. When the controller 7 starts the corresponding simulated fire source, the LED prompting lamp 14 corresponding to the simulated fire source is turned on, and the speed of the underground pipeline simulating the fire source spreading is known through the lighting condition of the LED prompting lamp 14.
The test device simulates earthquake through the vibrating table, simulates the secondary fire situation after the earthquake by a fire source, and the controller controls the ignition time and the ignition spreading speed so as to realize the simulation of the coupling effect of the secondary fire and the earthquake load.
Referring to fig. 1, 4, 5 and 6, a second embodiment of the invention provides a simulation test device for simulating an underground structure secondary fire under an earthquake load based on a vibrating table, which is different from the first embodiment in that:
a plurality of groups of first fire simulation assemblies are buried in the tunnel model, the first fire simulation assemblies can be arranged in the tunnel model 6 or on the outer wall of the tunnel model, and the plurality of groups of first fire simulation assemblies are respectively connected with the controller 7. Each group of first fire simulation assemblies comprises a first simulated fire source 8, a pipeline fracture signal collector 15, a first temperature sensing device 16 and a first smoke generating device 17, wherein the first simulated fire source 8, the pipeline fracture signal collector 15, the first temperature sensing device 16 and the first smoke generating device 17 are uniformly and correspondingly arranged. The pipeline fracture signal collector 15 is distributed on the outer wall or the inner wall of the pipe wall of the tunnel model. The first simulated fire source 8, the pipeline breakage signal collector 15, the first temperature sensing device 16 and the first smoke generating device 17 are respectively electrically connected with the controller 7. The first simulated fire source 8, the pipeline breakage signal collector 15, the first temperature sensing device 16 and the first smoke generating device 17 can be connected with the controller through wires or wireless signals.
The second fire component comprises a second simulated fire source 9, a second temperature sensing device 18 and a second smoke generating device 19, and the second simulated fire source 9, the second temperature sensing device 18 and the second smoke generating device 19 are respectively connected with the controller 7. When the first simulated fire source closest to the second fire component is started, and the first temperature sensing device corresponding to the first simulated fire source reaches the specified temperature, the controller issues an instruction to the adjacent first fire component and also issues an instruction to the second fire component closest to the second fire component, the second simulated fire source in the second fire component starts to work, and the second simulated fire source starts to work in sequence until all the second simulated fire sources start to work.
When the first simulated fire source closest to the third simulated fire source is started and reaches the specified temperature, the controller sends an instruction to the adjacent first simulated fire source, and simultaneously sends an instruction to the third simulated fire source closest to the third simulated fire source and starts the third simulated fire source until all the first simulated fire source, the second simulated fire source and the third simulated fire source are started.
The first temperature sensing device 16 or the second temperature sensing device 17 is a temperature sensor or a thermocouple probe.
In a second embodiment, under the earthquake load of the vibrating table, the controller controls the simulated fire source to start the simulated secondary fire according to the following steps:
1) a pipeline fracture signal collector at a pipeline fracture position caused by an earthquake collects a pipeline fracture signal on a tunnel model and transmits the signal to a controller;
2) the controller receives the signal and sends an instruction to a first simulated fire source corresponding to the pipeline fracture position, and the corresponding first simulated fire source is started to be simulated as a first fire ignition point;
3) the corresponding first temperature sensing device monitors the temperature of the first simulated fire source and transmits a temperature signal to the controller;
4) when the first temperature sensing device monitors that the temperature reaches the designated temperature, the controller sends an instruction to the first smoke generating device, starts the corresponding first smoke generating device, and starts the corresponding first smoke generating device to simulate the secondary fire smoke condition;
5) when the controller sends an instruction to the corresponding first smoke generating device, the controller also sends an instruction to the first simulated fire sources of the adjacent first fire components on two sides, and the first simulated fire sources on the two adjacent sides are started to simulate the outward spreading condition of the fire point of the first fire;
6) the controller sequentially controls the first simulated fire sources to start, when the corresponding first temperature sensing devices monitor the specified temperature, the controller sends instructions to the corresponding smoke generators and the adjacent first simulated fire sources, starts the corresponding smoke generators and the adjacent first simulated fire sources to work, and repeats the steps until all the first simulated fire sources start;
7) when a first simulated fire source closest to a second simulated fire source is started, a corresponding first temperature sensing device monitors that the temperature reaches a specified temperature, and then signals are transmitted to a controller, the controller sends an instruction to a corresponding first smoke generator and starts the corresponding first smoke generator, and simultaneously sends an instruction to the first simulated fire sources on two adjacent sides and a second simulated fire source closest to the first simulated fire sources, the first simulated fire sources on two adjacent sides and the second simulated fire source closest to the first simulated fire sources are started, so that the condition that the fire spreads to a second fire component is simulated;
after the first second simulated fire source is started and the corresponding second temperature sensing device monitors the specified temperature, the controller sends an instruction to the corresponding second smoke generator and the adjacent second simulated fire source, the corresponding second smoke generator and the adjacent second simulated fire source are started, and the steps are repeated until all the second simulated fire sources are started;
8) when the first simulated fire source closest to the third simulated fire source is started and reaches the specified temperature, the controller sends an instruction to the adjacent first simulated fire source, and simultaneously sends an instruction to the third simulated fire source closest to the third simulated fire source and starts the third simulated fire source until all the first simulated fire source, the second simulated fire source and the third simulated fire source are started.
The third simulated fire source 13 can be selected as an ignition source or a surface fire source, the surface fire source adopts a heating net piece, and the ignition source can be realized by a heater.
When the third simulated fire source is an ignition source, the third simulated fire source is composed of a plurality of simulated fire sources, each simulated fire source is provided with a third temperature sensing device and a third smoke generator, when the corresponding third temperature sensing device reaches a specified temperature, an instruction is sent to the adjacent third simulated fire source and the corresponding third smoke generator, and the third simulated fire sources are sequentially started until all the third simulated fire sources are started to work.
The earthquake load is simulated through the vibrating table, the pipeline breakage signal collector monitors the position of pipeline breakage caused by the earthquake, and the pipeline breakage position is the first firing point of the secondary fire. The temperature sensing device is used for monitoring the temperature of the simulated fire source, and when a certain temperature is monitored, the adjacent simulated fire source is started, so that the part on fire in a real fire, the spreading time of the fire source and the spreading mode are simulated. The real coupling effect of earthquake and fire can be clearly understood from the test device. The earthquake-induced secondary fire disaster detector can be used as a teaching model of a secondary fire disaster caused by an earthquake, and can also provide a test basis for scientific research on the secondary fire disaster caused by the earthquake.
Referring to fig. 1-2, a third embodiment of the present invention provides a simulation test device for simulating an underground structure secondary fire under a seismic load based on a vibrating table, which is different from the second embodiment in that: and two end parts of the tunnel model are provided with air exhaust devices. During the test, one side of the air exhaust device is started, and the direction of the first simulated fire source spreading is consistent with the direction of the wind blown out by the air exhaust device. Therefore, the fire spreading direction under the condition of wind is researched, and the speed for simulating the fire source spreading is set according to the wind power of the exhaust device.
Meanwhile, a smoke alarm and an automatic fire extinguishing device are arranged in the underground building area 3, the smoke alarm is connected with the automatic fire extinguishing device, the smoke alarm senses smoke, and the smoke is extinguished in time through the fire extinguishing device.
Claims (10)
1. The utility model provides a secondary fire analogue test device of underground structure under based on shaking table simulation earthquake load, characterized by: including shaking table and mold box, the shaking table top is arranged in to the mold box, the inside simulation underground structure of mold box, underground structure includes underground building region and underground pipe gallery region, underground pipe gallery region includes the soil layer and buries the intraformational tunnel model of soil body underground, the first conflagration simulation subassembly of multiunit is buried underground to the tunnel model, bury multiunit second conflagration simulation subassembly underground in the soil layer, underground building region is provided with a plurality of third conflagration simulation fire sources, bury at least one controller underground in the underground pipe gallery region, the controller is connected with external power supply, first conflagration simulation subassembly, second conflagration simulation subassembly and third simulation fire source are connected with the controller wire respectively.
2. The underground structure secondary fire simulation test device based on the vibrating table for simulating the earthquake load as claimed in claim 1, wherein the underground structure secondary fire simulation test device is characterized in that: the first fire simulation assembly is a first simulated fire source, the second fire simulation assembly is a second simulated fire source, and each simulated fire source is connected with the controller respectively.
3. The implementation method of the underground structure secondary fire simulation test device based on the vibrating table to simulate the earthquake load is characterized in that: simulating earthquake load through the shaking table, the inside earthquake inductor that sets up of controller, when the shaking table begins work, the earthquake inductor received signal in the controller, and the controller begins work control simulation fire source and starts, the step that the controller starts simulation fire source simulation secondary fire is as follows:
1) the controller controls a first simulated fire source in one of the first fire simulation components to start and work, and the first started simulated fire source is used as a fire ignition point;
2) the controller sequentially sends instructions to the adjacent first simulated fire sources according to a certain time interval, and the adjacent first simulated fire sources are sequentially started until the first simulated fire sources of all the first fire simulation assemblies are started, so that the condition that the fire point is used as a starting point to spread to the adjacent first simulated fire sources on two sides is simulated.
3) After the first simulated fire sources of all the first fire simulation assemblies are started, the controller sends instructions to the second simulated fire source and the third simulated fire source of the second fire simulation assembly respectively, and the second simulated fire source and the third simulated fire source which are closest to the first simulated fire source are started at last.
4) The controller sends instructions to the adjacent second simulated fire sources in sequence by taking the first started second simulated fire source as a starting point at a certain time interval until all the second simulated fire sources are started, and simultaneously the controller sends instructions to the adjacent third simulated fire sources in sequence by taking the first started third simulated fire source as a starting point at a certain time interval until all the third simulated fire sources are started.
4. The underground structure secondary fire simulation test device based on the vibrating table under the simulated earthquake load is characterized in that: each group of first fire simulation assemblies comprises a first simulated fire source, a pipeline fracture signal collector, a first temperature sensing device and a first smoke generation device, wherein the first simulated fire source, the pipeline fracture signal collector, the first temperature sensing device and the first smoke generation device are arranged in a one-to-one correspondence manner, the pipeline fracture signal collector is distributed on the pipe wall of the tunnel model, and the first simulated fire source, the pipeline fracture signal collector, the first temperature sensing device and the first smoke generation device are respectively electrically connected with the controller.
5. The underground structure secondary fire simulation test device based on the vibrating table for simulating the earthquake load is characterized in that: the second fire disaster assembly comprises a second simulation fire disaster, a second temperature sensing device and a second smoke generating device, the second simulation fire disaster, the second temperature sensing device and the second smoke generating device are respectively connected with the controller, after the first temperature sensing device in the first fire disaster assembly closest to the second fire disaster assembly reaches the specified temperature, an instruction is issued to the second fire disaster assembly through the controller, and the second simulation fire disaster in the second fire disaster assembly starts to work.
6. The simulation test device for simulating the secondary fire of the underground structure under the earthquake load based on the vibrating table as claimed in claim 1, 2, 3, 4 or 5, wherein: the underground building area is a simulated subway station and comprises a simulated platform, a wall surface and a track area, the second fire disaster assembly is located below the track area, a plurality of third simulated fire sources are distributed on the wall surface and the simulated platform, and the third simulated fire sources are respectively connected with the controller.
7. The simulation test device for simulating the secondary fire of the underground structure under the earthquake load based on the vibrating table as claimed in claim 6, wherein: the first simulated fire source and the second simulated fire source are ignition sources, the ignition sources are realized by adopting heaters, the third simulated fire source is an ignition source or a surface fire source, and the surface fire source adopts a heating net piece.
8. The underground structure secondary fire simulation test device based on the vibrating table for simulating the earthquake load is characterized in that: and a plurality of LED prompting lamps are arranged on the inner wall of the model box, and are respectively connected with the first simulated fire source, the second simulated fire source and the third simulated fire source through leads and are in one-to-one correspondence.
9. The implementation method of the simulation test device for simulating the secondary fire of the underground structure under the earthquake load based on the vibrating table as claimed in claim 1 is characterized in that: simulating earthquake load through a vibrating table, controlling the simulated fire source to start by a controller, controlling the simulated fire source to start to simulate secondary fire by the controller,
1) the pipeline fracture signal collector at the pipeline fracture part caused by the earthquake collects pipeline fracture signals and transmits the signals to the controller;
2) the controller receives the signal and sends an instruction to a first simulated fire source corresponding to the pipeline fracture position, and starts a corresponding first simulated fire source which simulates a fire ignition point;
3) the corresponding first temperature sensing device monitors the temperature of the first simulated fire source, and when the first temperature sensing device monitors that the temperature reaches a specified temperature, a temperature signal is transmitted to the controller;
4) the controller sends an instruction to the corresponding first smoke generating device, starts the corresponding first smoke generating device and simulates the smoke condition of the secondary fire;
5) the controller sends an instruction to the corresponding first smoke generating device, and simultaneously sends an instruction to the first simulated fire sources of the adjacent first fire components on two sides, and the first simulated fire sources on the two adjacent sides are started to simulate the outward spreading condition of the fire point of the first fire;
6) when a first simulated fire source closest to a second simulated fire source is started, a corresponding first temperature sensing device monitors that the temperature reaches a specified temperature, signals are transmitted to a controller, the controller sends an instruction to a corresponding first smoke generator and starts the corresponding first smoke generator, and simultaneously sends an instruction to the first simulated fire sources on two adjacent sides and a second simulated fire source closest to the first simulated fire sources on the two adjacent sides, the first simulated fire sources on the two adjacent sides and the second simulated fire source closest to the first simulated fire sources are started, and the condition that fire spreads to a second fire component is simulated;
7) the controller sequentially controls the first simulated fire sources to start, when the corresponding first temperature sensing devices monitor the specified temperature, the controller sends instructions to the corresponding smoke generators and the adjacent first simulated fire sources, starts the corresponding smoke generators and the adjacent first simulated fire sources to work, and repeats the steps until all the first simulated fire sources start;
after the first second simulated fire source is started and the corresponding second temperature sensing device monitors the specified temperature, the controller sends out an instruction to the corresponding second smoke generator and the adjacent second simulated fire source, the corresponding second smoke generator and the adjacent second simulated fire source are started, and the steps are repeated until all the second simulated fire sources are started;
8) when the first simulated fire source closest to the third simulated fire source is started and reaches the designated temperature, the controller sends an instruction to the adjacent first simulated fire source, and simultaneously sends an instruction to the third simulated fire source closest to the third simulated fire source and starts the third simulated fire source until all the first simulated fire sources, the second simulated fire sources and the third simulated fire sources are started.
10. The simulation test device for simulating the secondary fire of the underground structure under the earthquake load based on the vibrating table as claimed in claim 6, 7 or 8, wherein: the temperature sensing means comprises a temperature sensor or a thermocouple probe.
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