A high ground temperature tunnel environment simulation test device for thermal comfort evaluation

Abstract

The present application provides a high geothermal tunnel environment simulation test device for thermal comfort evaluation, which relates to the field of high geothermal tunnel environment simulation test. A high geothermal tunnel environment simulation test device for thermal comfort evaluation, comprising: a test bench, a tunnel model is fixedly connected to the top of the test bench, the tunnel model adopts a lining structure design, and a fixed frame is fixedly connected to the center of the bottom of the test bench, and gas cylinders are embedded on both the front and rear sides of the fixed frame; a supply component used in conjunction with the gas cylinder is arranged in the fixed frame, and a temperature control field component is arranged on the supply component. The high geothermal tunnel environment simulation test device for thermal comfort evaluation takes the temperature control field, wind field and stress field as the starting point, and combines the extreme environments of extreme heat and extreme cold to achieve a full simulation test effect on the environment of tunnel construction under high geothermal conditions, and obtains comprehensive environmental factor supporting data, which is beneficial to the subsequent thermal comfort evaluation of high geothermal tunnels.

Description

Technical Field

[0001] The present application relates to the technical field of high geothermal tunnel environment simulation test, and in particular to a high geothermal tunnel environment simulation test device for thermal comfort evaluation. Background Art

[0002] Tunnels are engineering structures buried in the ground, and are a form of human use of underground space. Tunnels can be divided into traffic tunnels, hydraulic tunnels, municipal tunnels, mining tunnels, and military tunnels. Due to the vast territory of my country and different climatic conditions, tunnels need to be built in some high geothermal areas according to construction needs. Before the construction of high geothermal tunnels, designers will build tunnel models according to the local high geothermal environment for simulation tests.

[0003] In the prior art (publication number CN104655441B, patent name is a patent application for a tunnel model test bench), the test bench loads the tunnel model through the gas / hydraulic pressure in a confined space, and the pressurized gas / liquid can be replaced at the same time, which can simulate the coupling effect of the tunnel lining structure damage under the tunnel confining pressure and the corrosive environment. In the process of implementing this technical solution, it is found that there are at least the following problems in the prior art.

[0004] When testers conducted tunnel simulation tests based on local high geothermal conditions, they mostly only took the high geothermal environment into consideration. However, there are many environmental factors that affect tunnel construction under high geothermal conditions, including temperature and humidity, ventilation wind force, and the stress on the tunnel. They also did not fully consider the impact of extreme environments. This was too one-sided and lacked evidence for various factors, which was not conducive to the subsequent thermal comfort evaluation work in high geothermal tunnel environments. Summary of the invention

[0005] This application aims to at least solve the technical problem that the existing technology cannot fully simulate the environment of tunnel construction under high geothermal conditions by taking temperature control field, wind field and stress field as the starting point, combining extreme environments of extreme heat and extreme cold, and the obtained environmental factor supporting data is too one-sided, which affects the subsequent thermal comfort evaluation of high geothermal tunnels. To this end, this application proposes a high geothermal tunnel environment simulation test device for thermal comfort evaluation.

[0006] A high ground temperature tunnel environment simulation test device for thermal comfort evaluation according to an embodiment of the present application includes: a test stand, a tunnel model is fixedly connected to the top of the test stand, the tunnel model adopts a lining structure design, and a fixing frame is fixedly connected to the center of the bottom of the test stand, and gas collecting cylinders are embedded on both the front and rear sides of the fixing frame;

[0007] A supply assembly used in conjunction with the gas collecting cylinder is arranged in the fixing frame, and a temperature control field assembly is arranged on the supply assembly;

[0008] Wind field components are arranged on both sides of the fixing frame, inflatable components are arranged around the top of the tunnel model, and stress field components are arranged on the inflatable components.

[0009] Preferably, the supply assembly includes a servo motor, which is fixed at the center of the bottom of the fixed frame, and the output shaft of the servo motor is fixedly connected to a belt pulley, a boss is fixedly connected to one side of the top of the belt pulley, and the surface wall of the boss is slidably connected to a movable frame, push rods are fixedly connected to the centers of both sides of the movable frame, and the other end of the push rod is fixedly connected to a piston that slides with a gas collecting cylinder, the outer sides of the two groups of gas collecting cylinders are connected to an air supply pipe, and the end of the air supply pipe is connected to a gas storage tank that is fixedly matched with the stand.

[0010] Preferably, the temperature control field assembly includes a cavity, which is opened in the inner cavity of the stand near the tunnel model, and a flow-equalizing hole communicating with the cavity is opened at the top of the stand near the tunnel model, a cooling machine is fixedly connected to one side of the bottom of the stand, and a four-way valve is connected to one side of the cooling machine through a delivery pipe, both ends of the four-way valve are connected to straight pipes used in conjunction with a gas storage tank, and the top of the four-way valve is connected to a supply head used in conjunction with the cavity.

[0011] Preferably, the wind farm component includes a wind collecting box, two groups of the wind collecting boxes are fixed on both sides of a fixed frame, and the side of the belt pulley away from the fixed frame is connected to a pulley that cooperates with the wind collecting box for rotation through a belt drive, the inner cavities of the two groups of pulleys are fixedly connected to exhaust blades used in conjunction with the wind collecting box through a rotating shaft, and the outer side of the wind collecting box is connected to a guide pipe, the ends of the two groups of guide pipes are connected to a semicircular frame, and the inner side of the semicircular frame is embedded with a flow equalizing net used in conjunction with a tunnel model.

[0012] Preferably, the inflation component includes angle tubes, two groups of the angle tubes are connected at the rear end of the air tank, and the end of the angle tube away from the air tank is connected to a three-way valve, the top of the three-way valve is connected to a five-way valve, and the four ends of the five-way valve are connected to branch pipes, the ends of the four groups of branch pipes away from the five-way valve are connected to a main pipe, and the end of the main pipe away from the branch pipe is connected to a pressure gauge.

[0013] Preferably, the stress field assembly includes a sealing cylinder, four groups of the sealing cylinders are connected to the bottom end of the main pipe, and the inner cavity of the sealing cylinder is slidably connected to a T-rod, the outer surface of the four groups of T-rods is sleeved with a reset spring fixedly matched with the sealing cylinder, and the bottom of the T-rod is fixedly connected with an extrusion seat, and the center of the bottom of the four groups of extrusion seats is embedded with a pressure probe used in conjunction with the tunnel model.

[0014] Preferably, both sides of the movable frame are fixedly connected with sliding blocks, and both sides of the inner cavity of the fixed frame are provided with sliding rails slidably matched with the sliding blocks.

[0015] Preferably, the inner cavities of the two groups of gas storage tanks are reserved with pressure sensors, and the front ends of the gas storage tanks are connected to exhaust pipes, and the two groups of exhaust pipes are provided with exhaust valves.

[0016] Preferably, a pressure relief pipe is provided at the front end of the five-way valve, and a pressure relief valve is provided on the pressure relief pipe, and the tunnel model adopts a lining structure design.

[0017] Preferably, sealing grooves are provided on both sides of the tunnel model, and electric push rods are arranged near the top of the tunnel model near the sealing grooves, and the piston rods of the two groups of electric push rods are fixedly connected with sealing plates used in conjunction with the sealing grooves.

[0018] The beneficial effect of the present application is that in the tunnel environment simulation test under high ground temperature conditions, the servo motor of the supply component first provides a unified driving source, and the convex head on the belt pulley drives the two groups of push rods on the moving frame to move back and forth, and then the two groups of pistons reciprocate in the two groups of gas collecting cylinders to produce pressurized gas, which is supplied to the two groups of gas storage tanks through the two groups of gas pipes for temporary storage and standby use, and then the cooling integrated machine of the temperature control field component provides a supply of cold and heat sources and supplies them to the four-way valve, and the hot summer is simulated by switching between high temperature and low temperature. The pressurized gas in the two gas storage tanks is supplied to the four-way valve through two sets of straight pipes, and then reaches the tunnel model through the uniform flow holes on the cavity by the supply head, realizing the simulation of the high geothermal environment of the tunnel, and also meeting the simulation requirements of the extreme environments of extreme heat and extreme cold, achieving the test purpose of the tolerance and life of the high geothermal tunnel. At the same time, the two sets of wind gathering boxes of the wind farm assembly provide wind gathering space support, and the two sets of pulleys drive the two sets of exhaust blades to generate wind, simulating the supply of wind source, and then the two sets of guide pipes pass through the two The flow-equalizing net on the semicircular frame is blown into the tunnel model, and the "through-hall wind" and "closed wind" environments are simulated in the tunnel model through the alternating opening and closing of the two sets of electric push rods and the blocking plates, so as to achieve the test purpose of the ventilation of the high geothermal tunnel. Then, the two sets of angle pipes of the inflation assembly supply the pressurized gas in the two sets of gas storage tanks into the five-way valve through the three-way valve, and then supply it into the four sets of main pipes through the four sets of branch pipes. The pressure of the pressurized gas supplied into the four sets of main pipes is detected by the four sets of pressure gauges, and then the pressurized gas supplied into the four sets of main pipes is sent to the The four sets of sealing cylinders of the stress field assembly force four sets of T-bars to press down, and the four sets of pressure probes on the extrusion seats are used to evenly and comprehensively squeeze the tunnel model all around, simulating the extrusion stress environment of the tunnel model caused by external forces. Starting from the temperature control field, wind field and stress field, and combining the extreme environments of extreme heat and extreme cold, the environment of tunnel construction under high geothermal conditions is fully simulated to achieve test effects, and comprehensive environmental factor supporting data are obtained, which is conducive to the subsequent thermal comfort evaluation of high geothermal tunnels.

[0019] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of a high ground temperature tunnel environment simulation test device for thermal comfort evaluation according to an embodiment of the present application;

[0022] Figure 2 It is a bottom view of the three-dimensional structure of a high ground temperature tunnel environment simulation test device for thermal comfort evaluation according to an embodiment of the present application;

[0023] Figure 3 is a three-dimensional structural cross-sectional view of a high ground temperature tunnel environment simulation test device for thermal comfort evaluation according to an embodiment of the present application;

[0024] Figure 4 This is a three-dimensional internal view of a high ground temperature tunnel environment simulation test device for thermal comfort evaluation according to an embodiment of the present application;

[0025] Figure 5 is a side view of the supply assembly and the temperature control field assembly structure according to an embodiment of the present application;

[0026] Figure 6 is a side cross-sectional view of the structure of a fixing frame, a gas collecting cylinder and a supply assembly according to an embodiment of the present application;

[0027] Figure 7 is a side view of the supply assembly structure according to an embodiment of the present application;

[0028] Figure 8 is a partial side cross-sectional view of the structure of the test stand and the temperature control field assembly according to an embodiment of the present application;

[0029] Fig. 9 is a side cross-sectional view of a supply assembly and a wind farm assembly structure according to an embodiment of the present application;

[0030] Fig.10 is a partial bottom view of the supply assembly and wind farm assembly structure according to an embodiment of the present application;

[0031] Fig.11 is a partial rear view of the supply assembly, the inflation assembly and the stress field assembly according to an embodiment of the present application;

[0032] Fig.12 is a bottom-up cross-sectional view of the inflatable component and the stress field component structure according to an embodiment of the present application;

[0033] Fig.13 It is a front view of the tunnel model, monitoring field assembly, electric push rod and blocking plate structure according to an embodiment of the present application;

[0034] Fig.14 is a bottom view of a monitoring field assembly, an electric push rod, and a blocking plate structure according to an embodiment of the present application;

[0035] Fig.15 It is a partial cross-sectional view of the tunnel model structure according to an embodiment of the present application.

[0036] Icons: 1. Stand; 2. Tunnel model; 3. Fixed frame; 4. Gas cylinder; 5. Supply assembly; 51. Servo motor; 52. Belt pulley; 53. Boss; 54. Mobile frame; 55. Push rod; 56. Piston; 57. Gas pipe; 58. Gas storage tank; 6. Temperature control field assembly; 61. Cavity; 62. Flow-equalizing hole; 63. Cooling machine; 64. Four-way valve; 65. Straight pipe; 66. Supply head; 7. Wind field assembly; 71. Wind box; 72. Pulley; 73. Exhaust blade; 74. Guide pipe; 75. Semicircular frame; 76. Flow-equalizing net; 8. Inflatable assembly; 81. Angle pipe; 82. Three-way valve; 83, five-way valve; 84, branch pipe; 85, main pipe; 86, pressure gauge; 9, stress field assembly; 91, sealing tube; 92, T-bar; 93, reset spring; 94, extrusion seat; 95, pressure probe; 10, monitoring field assembly; 101, long plug tube; 102, short plug tube; 103, wiring skeleton; 104, collection box; 105, long temperature probe; 106, long humidity probe; 107, short temperature probe; 108, short humidity probe; 11, slider; 12, slide rail; 13, pressure sensor; 14, exhaust pipe; 15, pressure relief pipe; 16, electric push rod; 17, blocking plate. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0038] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] like Figure 1-Figure 15As shown, a high ground temperature tunnel environment simulation test device for thermal comfort evaluation according to an embodiment of the present application includes: a stand 1, a tunnel model 2 is fixedly connected to the top of the stand 1, and a fixing frame 3 is fixedly connected to the center of the bottom of the stand 1, and gas collecting cylinders 4 are embedded on both the front and rear sides of the fixing frame 3;

[0045] Both sides of the tunnel model 2 are provided with blocking grooves, and electric push rods 16 are provided near the top of the blocking grooves of the tunnel model 2. The piston rods of the two sets of electric push rods 16 are fixedly connected with blocking plates 17 used in conjunction with the blocking grooves. According to the test requirements, the two sides of the tunnel model 2 are opened and closed;

[0046] A supply assembly 5 used in conjunction with the gas collecting cylinder 4 is provided in the fixed frame 3, and is mainly used for pressure supply work. A temperature control field assembly 6 used in conjunction with the bench 1 and the tunnel model 2 is provided on the supply assembly 5 to perform a temperature control field test on the tunnel model 2;

[0047] Wind field components 7 for use with the tunnel model 2 are provided on both sides of the fixed frame 3, and wind field tests are performed on the tunnel model 2. Inflation components 8 for use with the supply components 5 are provided on all four sides of the top of the tunnel model 2, and stress field components 9 for use with the tunnel model 2 are provided on the inflation components 8, and stress field tests are performed on the tunnel model 2.

[0048] like Figures 5 to 12 As shown, when testers conduct tunnel simulation tests according to local high geothermal conditions, most of them only consider the high geothermal environment, and fail to take the temperature control field, wind field and stress field as the starting point, and combine the extreme environment of extreme heat and extreme cold to fully simulate the environment of tunnel construction under high geothermal conditions. The environmental factor supporting data obtained is too one-sided, which affects the subsequent thermal comfort evaluation of high geothermal tunnels. The supply component 5 includes a servo motor 51, which is fixed at the center of the bottom of the fixing frame 3, and the servo motor 51 provides a unified drive source;

[0049] The output shaft of the servo motor 51 is fixedly connected to a belt pulley 52, a convex head 53 is fixedly connected to one side of the top of the belt pulley 52, and a moving frame 54 is slidably connected to the surface wall of the convex head 53, and push rods 55 are fixedly connected to the centers of both sides of the moving frame 54, and the other ends of the push rods 55 are fixedly connected to pistons 56 that slide with the gas collecting cylinder 4. The convex head 53 on the belt pulley 52 drives the two groups of push rods 55 on the moving frame 54 to move back and forth, and then the two groups of pistons 56 reciprocate in the two groups of gas collecting cylinders 4 to generate pressurized gas, and the outer sides of the two groups of gas collecting cylinders 4 are connected to an air delivery pipe 57, and the end of the air delivery pipe 57 is connected to a gas storage tank 58 that is fixedly matched with the stand 1, and the gas is supplied to the two groups of gas storage tanks 58 through the two groups of air delivery pipes 57 for temporary storage and standby use;

[0050] Slide blocks 11 are fixedly connected to both sides of the mobile frame 54, and slide rails 12 that slide with the slide blocks 11 are provided on both sides of the inner cavity of the fixed frame 3. The two sides of the mobile frame 54 are slidably supported to improve the displacement stability of the mobile frame 54 to prevent it from shaking and tilting. Pressure sensors 13 are reserved in the inner cavities of the two groups of gas storage tanks 58 to monitor the pressure of the pressurized gas in the two groups of gas storage tanks 58 in real time, and the front ends of the gas storage tanks 58 are connected to exhaust pipes 14. Exhaust valves are provided on the two groups of exhaust pipes 14 to relieve the pressure on the excess pressurized gas in the two groups of gas storage tanks 58, so that the pressure in the two groups of gas storage tanks 58 is maintained in a safe state.

[0051] The temperature control field assembly 6 includes a cavity 61, which is provided in the inner cavity of the platform 1 near the tunnel model 2, and a flow-equalizing hole 62 communicating with the cavity 61 is provided at the top of the platform 1 near the tunnel model 2. A cooling integrated machine 63 is fixedly connected to one side of the bottom of the platform 1, and a four-way valve 64 is connected to one side of the cooling integrated machine 63 through a delivery pipe. The cooling integrated machine 63 of the temperature control field assembly 6 provides a cold and heat source supply and supplies it into the four-way valve 64, and the extreme environments of extreme heat and extreme cold are simulated by switching between high and low temperatures.

[0052] Both ends of the four-way valve 64 are connected with straight pipes 65 used in conjunction with the gas tank 58, and the top of the four-way valve 64 is connected with a supply head 66 used in conjunction with the cavity 61. The pressurized gas in the two groups of gas tanks 58 is supplied to the four-way valve 64 through the two groups of straight pipes 65, and then reaches the tunnel model 2 through the flow-balancing holes 62 on the cavity 61 by the supply head 66, thereby simulating the high geothermal environment of the tunnel while meeting the simulation requirements of extreme environments of extreme heat and extreme cold, thereby achieving the test purpose of the tolerance and life of the high geothermal tunnel.

[0053] The wind farm component 7 includes a wind collecting box 71, two groups of wind collecting boxes 71 are fixed on both sides of the fixed frame 3, both sides of the two groups of wind collecting boxes 71 are fixedly connected with legs, and one group of legs is fixedly connected with a PLC control panel, the two groups of wind collecting boxes 71 provide wind collecting space support, and the side of the belt pulley 52 away from the fixed frame 3 is connected to a pulley 72 that rotates with the wind collecting box 71 through a belt drive, the inner cavity of the two groups of pulleys 72 is fixedly connected with an exhaust blade 73 used in conjunction with the wind collecting box 71 through a rotating shaft, and the two groups of pulleys 72 drive the two groups of wind collecting boxes 71 to rotate. The exhaust blades 73 generate wind to simulate the supply of wind source, and the outer side of the wind collecting box 71 is connected with a guide pipe 74, and the ends of the two groups of guide pipes 74 are connected with a semicircular frame 75, and the inner side of the semicircular frame 75 is embedded with a flow equalizing net 76 used in conjunction with the tunnel model 2. The two groups of guide pipes 74 are then blown into the tunnel model 2 through the flow equalizing nets 76 on the two groups of semicircular frames 75. Through the alternating opening and closing of the two groups of electric push rods 16 and the blocking plates 17, the "through-the-hallway wind" and "enclosed wind" environments are simulated in the tunnel model 2, thereby achieving the experimental purpose of ventilation of high geothermal tunnels.

[0054] The inflatable assembly 8 includes an angle tube 81, two groups of angle tubes 81 are connected to the rear end of the gas storage tank 58, and one end of the angle tube 81 away from the gas storage tank 58 is connected to a three-way valve 82, the top of the three-way valve 82 is connected to a five-way valve 83, and the four ends of the five-way valve 83 are all connected to branch pipes 84, and one end of the four groups of branch pipes 84 away from the five-way valve 83 is connected to a main pipe 85, and the two groups of angle tubes 81 of the inflatable assembly 8 supply the pressurized gas in the two groups of gas storage tanks 58 through the three-way valve 82 into the five-way valve 83, and supply it into the four groups of main pipes 85 through the four groups of branch pipes 84, and one end of the main pipe 85 away from the branch pipes 84 is connected to a pressure gauge 86, and the four groups of pressure gauges 86 detect the pressure of the pressurized gas supplied into the four groups of main pipes 85;

[0055] The stress field assembly 9 includes a sealing cylinder 91. Four sets of sealing cylinders 91 are connected to the bottom end of the main pipe 85. The inner cavity of the sealing cylinder 91 is slidably connected with a T-shaped rod 92. The pressurized gas supplied from the four sets of main pipes 85 is then delivered to the four sets of sealing cylinders 91 of the stress field assembly 9 to force the four sets of T-shaped rods 92 to press downward. The outer surfaces of the four sets of T-shaped rods 92 are sleeved with a return spring 93 fixedly matched with the sealing cylinder 91, and the bottom of the T-shaped rod 92 is fixedly connected with an extrusion seat 94.

[0056] A pressure probe 95 used in conjunction with the tunnel model 2 is embedded in the center of the bottom of the four groups of extrusion seats 94, and the tunnel model 2 is uniformly and comprehensively extruded around the four groups of pressure probes 95 on the four groups of extrusion seats 94 to simulate the extrusion stress environment of the tunnel model 2 caused by external forces. Taking the temperature control field, wind field and stress field as the starting point, and combining the extreme environments of extreme heat and extreme cold, the environment of tunnel construction under high ground temperature conditions is fully simulated to achieve test results, and comprehensive environmental factor supporting data is obtained, which is conducive to the subsequent thermal comfort evaluation of high ground temperature tunnels;

[0057] A pressure relief pipe 15 is provided at the front end of the five-way valve 83 , and a pressure relief valve is provided on the pressure relief pipe 15 . According to actual needs, the pressure in the upper end space of the four groups of sealing cylinders 91 is relieved and discharged, which is beneficial to the resetting work of the four groups of extrusion seats 94 .

[0058] like Figures 13 to 15As shown, during the simulation test of the high geothermal tunnel by the test personnel, the temperature and humidity environment inside the high geothermal tunnel and in the space cannot be fully and real-time monitored based on multiple factors, which further affects the subsequent thermal comfort evaluation of the high geothermal tunnel. A monitoring field component 10 is provided on the tunnel model 2. The tunnel model 2 includes a long plug 101 and a short plug 102. The long plug 101 and the short plug 102 are interlaced around the tunnel model 2, and the long plug 101 penetrates the inner side of the tunnel model 2, and the short plug 102 penetrates the inner cavity of the tunnel model 2, which facilitates the monitoring of the temperature and humidity inside the tunnel model 2 and in the space, and timely knows the temperature and humidity changes inside the tunnel model 2 and in the space, so as to realize the structural stability simulation test of the tunnel model 2 under the temperature and humidity changes;

[0059] A wiring skeleton 103 is fixedly connected to the outside of the tunnel model 2, and both ends of the wiring skeleton 103 are provided with collection boxes 104 fixedly matched with the stand 1, and the inner wall of the wiring skeleton 103 is staggered with long temperature probes 105 and long humidity probes 106 used in conjunction with the long plug tube 101 and the short plug tube 102, as well as short temperature probes 107 and short humidity probes 108, to carry out comprehensive and real-time monitoring of the temperature and humidity inside the tunnel model 2 and in the space, and the reserved connecting wires in the wiring skeleton 103 transmit the monitored temperature and humidity data inside the tunnel model 2 and in the space to the collection box 104, so as to fully understand the changes in temperature and humidity inside the tunnel model 2 and in the space, and provide data support for the subsequent thermal comfort evaluation work of high geothermal tunnels.

[0060] Specifically, the working principle of the high ground temperature tunnel environment simulation test device for thermal comfort evaluation is as follows: when the test personnel conduct a tunnel environment simulation test under high ground temperature conditions, the PLC control panel first controls the servo motor 51 to start and drive the belt pulley 52 to rotate, and the slider 11 and the slide rail 12 provide sliding support compensation for the moving frame 54, then the convex head 53 on the belt pulley 52 drives the moving frame 54 to move back and forth, and the two groups of push rods 55 in the back and forth moving state drive the two groups of pistons 56 to move between the two groups of gas collecting The two gas collecting cylinders 4 perform alternate reciprocating work, and the pressurized gas generated in the two gas collecting cylinders 4 is supplied to the two gas storage tanks 58 through the two gas delivery pipes 57 for standby use, and the two pressure sensors 13 monitor the pressure of the pressurized gas in the two gas storage tanks 58 in real time. If the pressure in the two gas storage tanks 58 is too high, the exhaust valves on the two exhaust cylinders 14 are controlled to open, and the excess pressurized gas in the two gas storage tanks 58 is discharged by the two exhaust cylinders 14 to ensure that the pressure of the pressurized gas in the two gas storage tanks 58 is always kept within a safe range.

[0061] Then the cooling machine 63 is controlled to start and provide heat source supply, and the four-way valve 64 is controlled to start, so that the heat source generated by the cooling machine 63 is supplied to the four-way valve 64, and at the same time, the pressurized gas in the two groups of gas storage tanks 58 is supplied to the four-way valve 64 through the two groups of straight pipes 65 and merged with the heat source. The pressurized heat source is then supplied to the cavity 61 of the stand 1 by the supply head 66, and then evenly distributed in the space of the tunnel model 2 by the uniform flow holes 62. The temperature of the heat source provided by the cooling machine 63 gradually increases in a step-by-step manner to simulate a high ground temperature environment, and is divided into three test forms:

[0062] The first method is to keep the tunnel model 2 in an unobstructed state and observe the convergence and divergence time of the temperature in the tunnel model 2 when both ends are unobstructed.

[0063] The second method is to randomly open a set of electric push rods 16 and drive the blocking plate 17 to move down to the surface of the stand 1, blocking one end of the tunnel model 2, while keeping the other end unobstructed, and observe the convergence and divergence time of the tunnel model 2 under the condition that the temperature rises step by step at one end is blocked and the other end is unobstructed;

[0064] The third method: the two sets of electric push rods 16 can also be opened and the blocking plates 17 can be driven to move down to the surface of the stand 1 to block both ends of the tunnel model 2, so that the inside of the tunnel model 2 remains in a sealed space, and the gathering and dispersion time of the step-by-step rising temperature in the tunnel model 2 under the condition that both ends are blocked is observed again. When the step-by-step rising temperature reaches the highest temperature, a high temperature field phenomenon is formed in the tunnel model 2 to simulate the hot summer environment and observe;

[0065] Similarly, the cooling integrated machine 63 is controlled to start and provide a cold source supply, and the cold source is gradually reduced in a step-by-step manner in the tunnel model 2. Similarly, three different forms of low-temperature fields are formed in the tunnel model 2. When the temperature that is gradually reduced in a step-by-step manner reaches the lowest temperature, a low-temperature field phenomenon is formed in the tunnel model 2 to simulate an extremely cold environment and observe. When three different forms of temperature control fields are formed in the tunnel model 2, the test work of the step-by-step increase in temperature, the gathering and dispersion time in the tunnel model 2, and the extreme environment is completed.

[0066] The servo motor 51 drives the belt pulley 52 to rotate, and also drives the two sets of pulleys 72 to rotate through the belt. The two sets of pulleys 72 drive the two sets of exhaust blades 73 to rotate in the two sets of wind collecting boxes 71 and generate wind force, simulating the natural wind environment, and there are two test forms:

[0067] The first method is to control the channels of the two groups of guide pipes 74 to be in an open state, so that the wind generated in the two groups of wind collecting boxes 71 is supplied to the two groups of semicircular frames 75 by the two groups of guide pipes 74, and then reaches the tunnel model 2 after being processed by the two groups of equalizing nets 76, and forms a bidirectional wind field in the tunnel model 2, and observes the flow changes of the wind reaching the tunnel model 2 in both directions;

[0068] The second method is to control the channel of any group of guide pipes 74 to be in an open state, so that the wind generated by the group of wind collecting boxes 71 is supplied to the semicircular frame 75 through the guide pipe 74, and then reaches the tunnel model 2 after being processed by the group of equalizing nets 76, and forms a unidirectional wind field in the tunnel model 2, and observes the flow changes of the unidirectional wind reaching the tunnel model 2;

[0069] During the first and second temperature control field tests, the above two wind field changes can also be combined. When the tunnel model 2 is in an unobstructed state, wind flows in bidirectionally to observe the temperature and wind changes in the space of the tunnel model 2. When the tunnel model 2 is in a semi-blocked state, wind flows in unidirectionally into the tunnel model 2 in the unobstructed direction to observe the temperature and wind changes in the space of the tunnel model 2.

[0070] During the temperature control field and wind field simulation, the tunnel model 2 should always be subjected to the extrusion stress transmitted by the external force. First, the three-way valve 82 is controlled to be opened, and the pressurized gas in the two groups of gas storage tanks 58 is supplied to the five-way valve 83 through the two groups of angle pipes 81 through the three-way valve 82, and then supplied to the four groups of main pipes 85 through the four groups of branch pipes 84, and the pressure in the four groups of main pipes 85 is detected and displayed by the four groups of pressure gauges 86;

[0071] At the same time, the pressurized gas in the four groups of main pipes 85 is supplied to the upper end space in the four groups of sealing cylinders 91, and the pressure in the upper end space of the four groups of sealing cylinders 91 is increased. The four groups of T-shaped rods 92 are forced to move downward by the pressure force, and the four groups of return springs 93 are compressed. The four groups of T-shaped rods 92 moving downward synchronously drive the four groups of extrusion seats 94 to press synchronously on the four sides of the tunnel model 2, and the four groups of pressure probes 95 detect the downward pressure, simulating the extrusion stress formed by the external force transmission of the tunnel model 2, and the extrusion stress exists in both the temperature control field and the wind field test. After the test, the pressure relief valve on the pressure relief pipe 15 can be controlled to open, and the pressurized gas supplied to the four groups of sealing cylinders 91 is discharged through the pressure relief pipe 15 on the five-way valve 83 through the original route, and under the elastic extension of the four groups of return springs 93, the four groups of extrusion seats 94 and the pressure probes 95 are driven to separate from the surface of the tunnel model 2 through the four groups of T-shaped rods 92;

[0072] During the separate tests of the temperature control field and the wind field or the interactive tests of the temperature control field and the wind field, the long temperature probes 105 and the long humidity probes 106 which are staggeredly distributed in the long plug tube 101 which penetrates the inner side of the tunnel model 2 monitor and collect the spatial temperature and humidity data of the tunnel model 2 in real time. At the same time, the short temperature probes 107 and the short humidity probes 108 which are staggeredly distributed in the short plug tube 102 which penetrates the middle section of the inner cavity of the tunnel model 2 monitor and collect the internal temperature and humidity data of the tunnel model 2 in real time, and transmit them to the collection box 104 through the reserved connecting wires of the wiring skeleton 103. Finally, all the data of the temperature control field, wind field, stress field and monitoring site are summarized on the PLC control panel for inspection by the test personnel.

[0073] It should be noted that the specific models and specifications of the servo motor 51, the cooling integrated machine 63 and the electric push rod 16 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0074] The power supply and principle of the servo motor 51, the cooling integrated machine 63 and the electric push rod 16 are clear to those skilled in the art and will not be described in detail here.

[0075] The above are only embodiments of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0076] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A high ground temperature tunnel environment simulation test device for thermal comfort evaluation, characterized in that: include: A stand (1), wherein a tunnel model (2) is fixedly connected to the top of the stand (1), and a fixing frame (3) is fixedly connected to the center of the bottom of the stand (1), and gas collecting cylinders (4) are embedded on both the front and rear sides of the fixing frame (3); A supply assembly (5) for use with a gas collecting cylinder (4) is arranged in the fixed frame (3), and the supply assembly (5) comprises a servo motor (51), the servo motor (51) is fixed at the center of the bottom of the fixed frame (3), and the output shaft of the servo motor (51) is fixedly connected to a belt pulley (52), a convex head (53) is fixedly connected to one side of the top of the belt pulley (52), and a movable frame (54) is slidably connected to the surface wall of the convex head (53), push rods (55) are fixedly connected at the center of both sides of the movable frame (54), and the other end of the push rod (55) is fixedly connected to a piston (56) slidably matched with the gas collecting cylinder (4), and the outer sides of the two groups of gas collecting cylinders (4) are connected to gas delivery pipes (57), and the ends of the gas delivery pipes (57) are connected to The stand (1) is fixedly matched with a gas storage tank (58), and a temperature control field component (6) is arranged on the supply component (5), the temperature control field component (6) comprises a cavity (61), the cavity (61) is opened in the inner cavity of the stand (1) close to the tunnel model (2), and a flow-balancing hole (62) connected and matched with the cavity (61) is opened on the top of the stand (1) close to the tunnel model (2), a cooling integrated machine (63) is fixedly connected to one side of the bottom of the stand (1), and one side of the cooling integrated machine (63) is connected to a four-way valve (64) through a delivery pipe, both ends of the four-way valve (64) are connected to a straight pipe (65) used in conjunction with the gas storage tank (58), and the top end of the four-way valve (64) is connected to a supply head (66) used in conjunction with the cavity (61); Wind field components (7) are arranged on both sides of the fixed frame (3), and the wind field components (7) include wind gathering boxes (71). Two groups of wind gathering boxes (71) are fixed on both sides of the fixed frame (3), and a side of the belt pulley (52) away from the fixed frame (3) is connected to a pulley (72) that rotates with the wind gathering box (71) through a belt drive. The inner cavities of the two groups of pulleys (72) are fixedly connected to exhaust blades (73) that are used in conjunction with the wind gathering box (71) through a rotating shaft, and the outer side of the wind gathering box (71) is connected to a guide tube (74), and the ends of the two groups of guide tubes (74) are connected to a semicircular frame (75), and a flow balancing net (76) that is used in conjunction with the tunnel model (2) is embedded on the inner side of the semicircular frame (75). Inflatable components (8) are arranged around the top of the tunnel model (2), and a stress field component (9) is arranged on the inflatable component (8).

2. A high ground temperature tunnel environment simulation test device for thermal comfort evaluation according to claim 1, characterized in that: The inflation assembly (8) comprises an angle tube (81), two groups of the angle tubes (81) are connected to the rear end of the gas storage tank (58), and one end of the angle tube (81) away from the gas storage tank (58) is connected to a three-way valve (82), the top end of the three-way valve (82) is connected to a five-way valve (83), and the four ends of the five-way valve (83) are all connected to branch pipes (84), one end of the four groups of branch pipes (84) away from the five-way valve (83) is connected to a main pipe (85), and one end of the main pipe (85) away from the branch pipes (84) is connected to a pressure gauge (86).

3. The high ground temperature tunnel environment simulation test device for thermal comfort evaluation according to claim 2 is characterized in that: The stress field assembly (9) comprises a sealing cylinder (91), four groups of the sealing cylinders (91) are connected to the bottom end of the main pipe (85), and the inner cavity of the sealing cylinder (91) is slidably connected to a T-shaped rod (92), the outer surface of the four groups of the T-shaped rod (92) is sleeved with a return spring (93) fixedly matched with the sealing cylinder (91), and the bottom of the T-shaped rod (92) is fixedly connected to an extrusion seat (94), and the center of the bottom of the four groups of the extrusion seat (94) is embedded with a pressure probe (95) used in conjunction with the tunnel model (2).

4. The high ground temperature tunnel environment simulation test device for thermal comfort evaluation according to claim 3 is characterized in that: Slide blocks (11) are fixedly connected to both sides of the movable frame (54), and slide rails (12) that slidably cooperate with the slide blocks (11) are provided on both sides of the inner cavity of the fixed frame (3).

5. A high ground temperature tunnel environment simulation test device for thermal comfort evaluation according to claim 4, characterized in that: The inner cavities of the two groups of gas storage tanks (58) are reserved with pressure sensors (13), and the front ends of the gas storage tanks (58) are connected to exhaust pipes (14), and exhaust valves are provided on the two groups of exhaust pipes (14).

6. A high ground temperature tunnel environment simulation test device for thermal comfort evaluation according to claim 5, characterized in that: A pressure relief pipe (15) is provided at the front end of the five-way valve (83), and a pressure relief valve is provided on the pressure relief pipe (15). The tunnel model (2) adopts a lining structure design.

7. A high ground temperature tunnel environment simulation test device for thermal comfort evaluation according to claim 6, characterized in that: Sealing grooves are provided on both sides of the tunnel model (2), and electric push rods (16) are provided near the top of the sealing grooves of the tunnel model (2), and the piston rods of the two groups of electric push rods (16) are fixedly connected to sealing plates (17) used in conjunction with the sealing grooves.

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