Testing device and method for simulating underground hot water seepage tunnel temperature and humidity field evolution

Abstract

The invention relates to a test device and method for simulating underground hot water seepage tunnel temperature and humidity field evolution. The test device comprises a tunnel model, a partition heating device, a hot water seepage simulation device, a temperature and humidity monitoring device and a ventilation device. The partition heating device covers the outer wall of the tunnel model and is used for simulating high-temperature surrounding rock; the hot water seepage simulation device is located on the inner side of the tunnel model, sprays hot water to the inner surface of the tunnel model and is used for simulating lining inner surface hot water seepage. The hot water exudation simulation device is provided with a thermal imager and a laser thermodetector and is used for obtaining the inner wall temperature field distribution of the tunnel model; the temperature and humidity monitoring device is arranged in the tunnel model and is used for measuring a temperature and humidity field in the tunnel model; the ventilation device is located at the top in the tunnel model. According to the invention, a high-temperature groundwater discharge type tunnel and tunnel high temperature and water seepage can be truly simulated, ventilation parameters of the ventilation device can be timely adjusted according to the evolution law of a temperature and humidity field in the tunnel, and the temperature and humidity environment of the tunnel can be accurately regulated and controlled.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel engineering simulation tests, and in particular to a test device and method for simulating the evolution of temperature and humidity fields of underground hot water seepage tunnels. Background Art

[0002] In areas with undulating terrain, complex geological structures, and prominent high ground temperature problems, tunnel projects face severe challenges in high-temperature environments. In areas where high ground temperature sections are widely distributed along the line, there are also many hot springs exposed, and the seepage paths of underground hot water are also complex and changeable. When underground hot water is exposed during tunnel construction, the temperature of the surrounding rock at the seepage location will be affected by the high-temperature hot water and an abnormally high-temperature zone will appear, thereby changing the temperature field distribution in the tunnel. In addition, the high-temperature hot water that infiltrates the tunnel continues to evaporate, further triggering the evolution of the temperature and humidity field in the tunnel. In areas with greater burial depths, the rock temperature of the tunnel body may exceed 50°C, and the highest ground temperature in the advance exploration hole may reach above 80°C.

[0003] However, tunnel construction requires that the ambient temperature does not exceed 28°C and the relative humidity does not exceed 80%. For high geothermal tunnels, the temperature and humidity environment in the tunnel deteriorates sharply after hot water seeps out. How to simulate the abnormally high temperature area of ​​the surrounding rock caused by hot water seepage, explore the evolution and distribution characteristics of the temperature and humidity field in the tunnel at different seepage locations, further optimize the ventilation parameter design, and ensure that the ambient temperature does not exceed 28°C and the relative humidity does not exceed 80% are key issues that need to be urgently solved in high geothermal hot water tunnels. Summary of the invention

[0004] The purpose of the present invention is to provide a test device and method for simulating the evolution of temperature and humidity fields in underground hot water seepage tunnels, so as to simulate the abnormally high temperature zone of surrounding rock caused by hot water seepage, explore the evolution and distribution characteristics of the temperature and humidity fields in the tunnel caused by hot water evaporation at different seepage locations, and propose targeted ventilation parameters for tunnel on-site construction.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A test device for simulating the evolution of temperature and humidity fields in underground hot water seepage tunnels, the test device comprising a tunnel model, a zone heating device, a hot water seepage simulation device, a temperature and humidity monitoring device, and a ventilation device;

[0007] The zoned heating device is covered on the outer wall of the tunnel model to simulate high-temperature surrounding rock;

[0008] The hot water seepage simulation device is located on the inner side of the tunnel model, spraying hot water onto the inner surface of the tunnel model to simulate hot water seepage on the inner surface of the lining; the hot water seepage simulation device has a thermal imager and a laser temperature meter to obtain the temperature field distribution of the inner wall of the tunnel model;

[0009] The temperature and humidity monitoring device is arranged in the tunnel model, and is used to measure the temperature and humidity field in the tunnel model;

[0010] The ventilation device is located at the top of the tunnel model.

[0011] Furthermore, the hot water seepage simulation device comprises a circumferential drive component, a longitudinal drive component and a hot water spray component;

[0012] The annular drive assembly is arched and located on both sides of the tunnel model in the longitudinal direction;

[0013] The longitudinal drive assembly is connected between the tops of the circumferential drive assemblies on both sides;

[0014] The hot water spraying assembly is mounted on the longitudinal driving assembly and can move longitudinally along the longitudinal driving assembly, and the longitudinal driving assembly can translate circumferentially along the circumferential driving assembly.

[0015] Further, the circumferential drive assembly includes a circumferential guide rod, a circumferential slider, a pulling rope, a winch and a longitudinal connecting rod;

[0016] The annular slider is sleeved on the annular guide rod, and is pulled by the pulling rope and the hoist to move annularly along the annular guide rod;

[0017] The two ends of the longitudinal connecting rod are connected to the annular sliders on both sides and move with the annular sliders.

[0018] Further, the longitudinal drive assembly includes a roller, a belt and a connecting piece;

[0019] The belt is sleeved on the outer surface of the roller and moves as the roller rotates;

[0020] The bottom end of the connecting member is connected to the bearing of the roller, and the top end is connected to the lower end of the annular slider, so that the longitudinal drive assembly moves together with the annular slider.

[0021] Further, the hot water spraying assembly includes a longitudinal slider, a spray head, the thermal imager and the laser thermometer;

[0022] The longitudinal slider is provided with a longitudinal through hole, the longitudinal connecting rod passes through the longitudinal through hole of the longitudinal slider, and the bottom of the longitudinal slider is connected to the belt and can move on the longitudinal connecting rod along with the belt;

[0023] The nozzle, the thermal imager and the laser temperature measuring instrument are fixed on the top of the longitudinal sliding block.

[0024] Furthermore, a hot water tank is provided on one longitudinal side of the tunnel model, and a water inlet pipe from the hot water tank is connected to the nozzle.

[0025] Furthermore, longitudinally arranged ditches are provided on both sides of the bottom of the tunnel model, and one end of the ditches is connected to the hot water tank.

[0026] Furthermore, the zoned heating device comprises a plurality of arc-shaped heating units divided longitudinally and circumferentially, and each of the heating units independently controls the heating temperature.

[0027] On the other hand, a test method for simulating the evolution of temperature and humidity field in underground hot water seepage tunnel is provided, the method being implemented based on the test device and comprising:

[0028] S1: Assemble the test device;

[0029] S2: Turn on the zone heating device, adjust each heating unit to the predetermined surrounding rock temperature, turn on the temperature and humidity monitoring device and the ventilation device, and measure the initial temperature and humidity field in the cave through the temperature and humidity monitoring device;

[0030] S3: Use the circumferential drive assembly and the longitudinal drive assembly to move the longitudinal slider along the inner surface of the tunnel lining, use the thermal imager and the laser temperature meter to test the temperature of the inner wall of the lining, and obtain the initial temperature field distribution of the inner surface of the lining;

[0031] S4: changing the heating unit at the predetermined position of the zone heating device to a predetermined hot water temperature value, and then repeating S3 to obtain the evolution characteristics of the temperature field on the inner surface of the lining under the action of high-temperature hot water, and analyzing the distribution range of the abnormal high-temperature area of ​​the lining structure caused by the hot water;

[0032] S5: Use the circumferential drive assembly and the longitudinal drive assembly to move the longitudinal slider to the vicinity of the abnormally high temperature area of ​​the lining structure, open the nozzle, extract the high-temperature hot water in the hot water tank through the water inlet pipe, and spray the hot water onto the inner surface of the lining to simulate hot water seepage;

[0033] S6: At this time, the temperature and humidity monitoring device is used to measure the evolution characteristics of the temperature and humidity field in the tunnel caused by evaporation after hot water seeps into the tunnel.

[0034] Furthermore, the method further comprises:

[0035] S7: Determine whether the ambient temperature in the tunnel exceeds 28°C and whether the relative humidity exceeds 80%. If the ambient temperature and humidity in the tunnel do not meet the requirements, continuously change the ventilation parameters of the ventilation device and repeat S2-S6 until the optimal ventilation parameters are obtained to guide on-site tunnel construction.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The present invention provides a test device and method for simulating the evolution of temperature and humidity field in underground hot water seepage tunnels, which can truly simulate high-temperature underground water discharge tunnels, configure heating components, water spray components, etc. to simulate high temperature and water seepage in tunnels, and the obtained temperature and humidity field evolution law is reliable and accurate. In addition, the present invention can timely adjust the ventilation parameters of the ventilation device according to the evolution law of the temperature and humidity field in the tunnel, effectively solve the problem of deterioration of the temperature and humidity environment in the tunnel caused by hot water seepage, and provide support for tunnel construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0039] Figure 1 It is a schematic diagram of the device of the present invention.

[0040] Figure 2 This is a diagram of the tunnel model structure.

[0041] Figure 3 It is a schematic diagram of the hot water seepage simulation device.

[0042] Figure 4 Schematic diagram of the circular drive assembly.

[0043] Figure 5 It is a schematic diagram of the longitudinal drive assembly.

[0044] Figure 6 It is a schematic diagram of the hot water spray assembly.

[0045] The symbols in the figure are:

[0046] 1- tunnel model, 2- zone heating device, 3- hot water seepage simulation device, 4- temperature and humidity monitoring device, 5- ventilation device, 6- base, 7- hot water tank;

[0047] 11-support structure model, 12-ditch;

[0048] 31-circumferential drive assembly, 32-longitudinal drive assembly, 33-hot water spray assembly, 34-water inlet pipe;

[0049] 311-annular guide rod, 312-annular slider, 313-pulling rope, 314-winding machine, 315-longitudinal connecting rod;

[0050] 321- roller, 322- belt, 323- connecting piece;

[0051] 331-longitudinal slider, 332-sprinkler, 333-thermal imager, 334-laser thermometer. DETAILED DESCRIPTION

[0052] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0053] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "top", "bottom", "inside", "outside", "longitudinal", "lateral", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", "setting" and the like should be understood in a broad sense, for example, it can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] It should also be noted that although the order of steps is mentioned in the method description, in some cases, they may be performed in an order different from that shown here, and this should not be construed as a limitation on the order of the steps.

[0056] In a specific implementation, the length direction of the tunnel model 1 is defined as a longitudinal direction, and the direction perpendicular to the length direction of the tunnel model 1 is defined as a lateral direction.

[0057] The present invention provides a test device for simulating the evolution of temperature and humidity fields in underground hot water seepage tunnels. The device can realistically simulate high-temperature underground water discharge tunnels, their heating environment and water seepage process, and explore the evolution of temperature and humidity fields in the tunnel caused by the evaporation of seeping hot water. In conjunction with the ventilation device, the device can obtain ventilation conditions that control the temperature and humidity of the tunnel environment within the allowable range of the specification, thus providing a reference for tunnel operation.

[0058] like Figure 1 The test device mainly includes a tunnel model 1, a zone heating device 2, a hot water seepage simulation device 3, a temperature and humidity monitoring device 4 and a ventilation device 5.

[0059] Tunnel model 1 is made of similar materials such as cement and sand to simulate the tunnel lining structure. Figure 2 The core part of the tunnel model 1 is a ring-shaped closed support structure model 11, the bottom of which is supported by a base 6. The bottom of the support structure model 11 has a ditch 12, and the ditch 12 is longitudinally symmetrically arranged on both sides of the bottom of the tunnel model 1.

[0060] The zoned heating device 2 is covered on the outer wall of the tunnel model 1, mainly on the top and both sides of the tunnel model 1, and is used to simulate high-temperature surrounding rock. The zoned heating device 2 includes a plurality of arc-shaped heating units divided longitudinally and circumferentially, each of which independently controls the heating temperature. One or more heating units can be designated to start and heat a specific area of ​​the tunnel model 1 at a predetermined temperature.

[0061] The hot water seepage simulation device 3 is located inside the tunnel model 1 and sprays hot water onto the inner surface of the tunnel model 1 to simulate hot water seepage on the inner surface of the lining. The hot water seepage simulation device 3 has a thermal imager 333 and a laser temperature meter 334 to obtain the temperature field distribution of the inner wall of the tunnel model 1.

[0062] Specifically, Figure 3 The hot water seepage simulation device 3 includes a circumferential drive component 31, a longitudinal drive component 32 and a hot water spray component 33. The circumferential drive component 31 is arched and located on both longitudinal sides of the tunnel model 1. The longitudinal drive component 32 is connected between the tops of the circumferential drive components 31 on both sides. The hot water spray component 33 is installed on the longitudinal drive component 32 and can move longitudinally along the longitudinal drive component 32. The longitudinal drive component 32 can translate circumferentially along the circumferential drive component 31.

[0063] Furthermore, if Figure 4 The annular driving assembly 31 includes an annular guide rod 311, an annular slider 312, a pulling rope 313, a hoist 314 and a longitudinal connecting rod 315. The annular slider 312 is sleeved on the annular guide rod 311, and is pulled by the pulling rope 313 and the hoist 314 to move annularly along the annular guide rod 311; the two ends of the longitudinal connecting rod 315 are connected to the annular sliders 312 on both sides, and move with the annular sliders 312.

[0064] Furthermore, if Figure 5 The longitudinal drive assembly 32 includes a roller 321, a belt 322 and a connector 323. The belt 322 is sleeved on the outer surface of the roller 321 and moves with the rotation of the roller 321. The bottom end of the connector 323 is connected to the bearing of the roller 321, and the top end is connected to the lower end of the annular slider 312, so that the longitudinal drive assembly 32 moves together with the annular slider 312.

[0065] Furthermore, if Figure 6The hot water spray assembly 33 includes a longitudinal slider 331, a nozzle 332, a thermal imager 333 and a laser thermometer 334. The longitudinal slider 331 is provided with a longitudinal through hole, and the longitudinal connecting rod 315 passes through the longitudinal through hole of the longitudinal slider 331. The bottom of the longitudinal slider 331 is connected to the belt 322 and can move on the longitudinal connecting rod 315 with the belt 322. The nozzle 332, the thermal imager 333 and the laser thermometer 334 are fixed on the top of the longitudinal slider 331.

[0066] In the above structure, both the winch 314 and the roller 321 are equipped with a driving device. After the winch 314 is started, the winch 314 pulls the pulling rope 313 to drive the circumferential slider 312 to move circumferentially on the circumferential guide rod 311, and the longitudinal connecting rod 315 and the longitudinal driving assembly 32 also move circumferentially. After the roller 321 is started, the roller 321 rotates to drive the belt 322 to drive, thereby driving the longitudinal slider 331 to move longitudinally along the longitudinal connecting rod 315. Based on the above two movements, the nozzle 332 can be moved to any position on the inner wall of the tunnel model 1.

[0067] The temperature and humidity monitoring device 4 is arranged in the tunnel model 1, and is used to measure the temperature and humidity field in the tunnel model 1. The temperature and humidity monitoring device 4 specifically includes a temperature sensor and a humidity sensor.

[0068] The ventilation device 5 is located at the top of the tunnel model 1 and is equipped with a motor to control its ventilation parameters.

[0069] In addition, a hot water tank 7 is provided on one longitudinal side of the tunnel model 1. The water inlet pipe 34 connected to the hot water tank 7 is connected to the nozzle 332. The water in the hot water tank 7 can be sprayed to the inner side of the tunnel lining through the water inlet pipe 34 and the nozzle 332. One end of the ditch 12 in the tunnel model 1 is also connected to the hot water tank 7. The hot water sprayed into the tunnel can be returned to the hot water tank 7 through the ditch 12.

[0070] The present invention also provides a test method for simulating the evolution of temperature and humidity field in an underground hot water seepage tunnel. The method is implemented based on the above test device and specifically includes the following steps:

[0071] S1: Assemble the test device;

[0072] S2: Turn on the zone heating device 2, adjust each heating unit to a predetermined surrounding rock temperature, turn on the temperature and humidity monitoring device 4 and the ventilation device 5, and measure the initial temperature and humidity field in the cave through the temperature and humidity monitoring device 4;

[0073] S3: Using the circumferential drive assembly 31 and the longitudinal drive assembly 32 to move the longitudinal slider 331 along the inner surface of the tunnel lining, the thermal imager 333 and the laser temperature meter 334 test the temperature of the inner wall of the lining, and obtain the initial temperature field distribution of the inner surface of the lining;

[0074] S4: Change the heating unit at the predetermined position of the zone heating device 2 to a predetermined hot water temperature value, and then repeat S3, test the temperature of the inner wall of the lining by means of the thermal imager 333 and the laser thermometer 334, draw a contour map of the temperature field of the inner wall of the lining, and compare it with the initial temperature field of the inner surface of the lining in S3, and then obtain the evolution characteristics of the temperature field of the inner surface of the lining under the action of high-temperature hot water. When the temperature of the inner surface of the lining is higher than the initial value, it is determined that the area is affected by the seepage of hot water, and finally the distribution range of the abnormally high temperature area of ​​the lining structure caused by hot water is obtained;

[0075] S5: Use the circumferential drive assembly 31 and the longitudinal drive assembly 32 to move the longitudinal slider 331 to the vicinity of the abnormally high temperature area of ​​the lining structure, open the nozzle 332, extract the high-temperature hot water in the hot water tank 7 through the water inlet pipe 34, and spray the hot water onto the inner surface of the lining to simulate hot water seepage;

[0076] S6: At this time, the temperature and humidity monitoring device 4 measures the evolution characteristics of the temperature and humidity field in the tunnel caused by evaporation after the hot water penetrates into the tunnel;

[0077] S7: Determine whether the ambient temperature in the tunnel exceeds 28°C and whether the relative humidity exceeds 80%. If the ambient temperature and humidity in the tunnel do not meet the requirements, continuously change the ventilation parameters of the ventilation device 5, and repeat S2-S6 until the optimal ventilation parameters are obtained to guide on-site tunnel construction.

[0078] This test device solves the problem that after the tunnel drainage system fails, hot water seeps into the tunnel environment at the failure location, and the hot water continues to evaporate, causing the tunnel temperature and humidity environment to deteriorate, endangering the tunnel construction environment. The test device can set different hot water temperatures and different water seepage locations to simulate the actual hot water seepage situation on the tunnel site, and then analyze the evolution process of the temperature and humidity field in the tunnel caused by hot water seepage, and determine the optimal ventilation parameters by adjusting the ventilation system in the test device to guide on-site construction.

[0079] The above specific examples are used to illustrate the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art, according to the concept of the present invention, some simple deductions, modifications or substitutions can be made.

Claims

1. The test device for simulating the evolution of temperature and humidity field in underground hot water seepage tunnel is characterized by: The test device comprises a tunnel model (1), a zone heating device (2), a hot water seepage simulation device (3), a temperature and humidity monitoring device (4) and a ventilation device (5); The zoned heating device (2) is covered on the outer wall of the tunnel model (1) and is used to simulate high-temperature surrounding rock; The hot water seepage simulation device (3) is located on the inner side of the tunnel model (1) and sprays hot water onto the inner surface of the tunnel model (1) to simulate hot water seepage on the inner surface of the lining; the hot water seepage simulation device (3) has a thermal imager (333) and a laser temperature measuring device (334) to obtain the temperature field distribution of the inner wall of the tunnel model (1); The temperature and humidity monitoring device (4) is arranged in the tunnel model (1) and is used to measure the temperature and humidity field in the tunnel model (1); The ventilation device (5) is located at the top of the tunnel model (1).

2. The test device for simulating the evolution of temperature and humidity field in underground hot water seepage tunnel according to claim 1, characterized in that: The hot water seepage simulation device (3) comprises a circumferential drive component (31), a longitudinal drive component (32) and a hot water spray component (33); The circumferential driving assembly (31) is arched and located on both sides of the tunnel model (1) in the longitudinal direction; The longitudinal drive assembly (32) is connected between the tops of the circumferential drive assemblies (31) on both sides; The hot water spraying assembly (33) is mounted on the longitudinal driving assembly (32) and can move longitudinally along the longitudinal driving assembly (32), and the longitudinal driving assembly (32) can translate circumferentially along the circumferential driving assembly (31).

3. The test device for simulating the evolution of temperature and humidity field in underground hot water seepage tunnel according to claim 2, characterized in that: The circumferential driving assembly (31) comprises a circumferential guide rod (311), a circumferential slider (312), a pulling rope (313), a winch (314) and a longitudinal connecting rod (315); The circumferential sliding block (312) is sleeved on the circumferential guide rod (311), and is pulled by the pulling rope (313) and the hoist (314), and can move circumferentially along the circumferential guide rod (311); Both ends of the longitudinal connecting rod (315) are connected to the annular sliders (312) on both sides and move with the annular sliders (312).

4. The test device for simulating the evolution of temperature and humidity field in underground hot water seepage tunnel according to claim 3, characterized in that: The longitudinal drive assembly (32) comprises a roller (321), a belt (322) and a connecting piece (323); The belt (322) is sleeved on the outer surface of the roller (321) and moves as the roller (321) rotates; The bottom end of the connecting member (323) is connected to the bearing of the roller (321), and the top end is connected to the lower end of the annular slider (312), so that the longitudinal driving component (32) moves together with the annular slider (312).

5. The test device for simulating the evolution of temperature and humidity field in underground hot water seepage tunnel according to claim 4, characterized in that: The hot water spraying assembly (33) comprises a longitudinal slider (331), a spray head (332), the thermal imager (333) and the laser temperature measuring instrument (334); The longitudinal slider (331) is provided with a longitudinal through hole, the longitudinal connecting rod (315) passes through the longitudinal through hole of the longitudinal slider (331), and the bottom of the longitudinal slider (331) is connected to the belt (322) and can move on the longitudinal connecting rod (315) along with the belt (322); The nozzle (332), the thermal imager (333) and the laser temperature measuring instrument (334) are fixed on the top of the longitudinal sliding block (331).

6. The test device for simulating the evolution of temperature and humidity field in underground hot water seepage tunnel according to claim 5, characterized in that: A hot water tank (7) is provided on one longitudinal side of the tunnel model (1), and a water inlet pipe (34) from the hot water tank (7) is connected to the nozzle (332).

7. The test device for simulating the evolution of temperature and humidity field in underground hot water seepage tunnel according to claim 6, characterized in that: Longitudinally arranged water ditches (12) are provided on both sides of the bottom of the tunnel model (1), and one end of the water ditches (12) is connected to the hot water tank (7).

8. The test device for simulating the evolution of temperature and humidity field in underground hot water seepage tunnel according to claim 7, characterized in that: The zoned heating device (2) comprises a plurality of arc-shaped heating units divided longitudinally and circumferentially, and each of the heating units independently controls the heating temperature.

9. Experimental method for simulating the evolution of temperature and humidity field in underground hot water seepage tunnel, characterized by: The method is implemented based on the test device according to claim 8, comprising: S1: Assemble the test device; S2: turning on the zone heating device (2), adjusting each heating unit to a predetermined surrounding rock temperature, turning on the temperature and humidity monitoring device (4) and the ventilation device (5), and measuring the initial temperature and humidity field in the cave through the temperature and humidity monitoring device (4); S3: using the circumferential drive assembly (31) and the longitudinal drive assembly (32) to move the longitudinal slider (331) along the inner surface of the tunnel lining, using the thermal imager (333) and the laser temperature meter (334) to test the temperature of the inner wall of the lining, and obtaining the initial temperature field distribution of the inner surface of the lining; S4: changing the heating unit at the predetermined position of the zone heating device (2) to a predetermined hot water temperature value, and then repeating S3 to obtain the evolution characteristics of the temperature field on the inner surface of the lining under the action of high-temperature hot water, and analyzing the distribution range of the abnormal high-temperature area of ​​the lining structure caused by the hot water; S5: using the circumferential drive assembly (31) and the longitudinal drive assembly (32) to move the longitudinal slide block (331) to the vicinity of the abnormally high temperature area of ​​the lining structure, opening the spray head (332), extracting high-temperature hot water in the hot water tank (7) through the water inlet pipe (34), and spraying the hot water onto the inner surface of the lining to simulate hot water seepage; S6: At this time, the temperature and humidity monitoring device (4) measures the evolution characteristics of the temperature and humidity field in the tunnel caused by evaporation after the hot water seeps into the tunnel.

10. The test method for simulating the evolution of temperature and humidity field in underground hot water seepage tunnel according to claim 9, characterized in that: The method further comprises: S7: Determine whether the ambient temperature in the tunnel exceeds 28°C and the relative humidity exceeds 80%. If the ambient temperature and humidity in the tunnel do not meet the requirements, the ventilation parameters of the ventilation device (5) are continuously changed, and S2-S6 are repeated until the optimal ventilation parameters are obtained to guide the on-site tunnel construction.

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