Multi-application scenario tunnel temperature model test system and method

Abstract

The application provides a multi-application-scene tunnel temperature model test system and method, the model test system comprises a model frame structure, a temperature control mechanism, a ventilation mechanism and a temperature and water pressure sensor; the model frame structure is used for fixing a main tunnel structure and a flat guide structure, a plurality of positioning holes are formed in the model frame structure, the temperature control mechanism is used for controlling the temperature inside and outside the test system, and the ventilation mechanism is used for ventilating the flat guide structure; the application has high universality, can be repeatedly used, is convenient to install and remove, can set different heating and ventilation forms according to test requirements, and can be suitable for various tunnel temperature model test working conditions.

Description

Technical Field

[0001] This invention relates to the field of tunnel model testing technology, and in particular to a tunnel temperature model testing system and method for multiple application scenarios. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Currently, railway and highway tunnel construction is experiencing rapid development. Due to complex terrain and unique environmental factors, railway lines often traverse mountainous areas using long, deep-buried tunnels. These areas, characterized by intense tectonic activity, complex geological conditions, and widespread distribution of geothermal water, present a series of engineering and technical challenges for tunnel construction. Influenced by burial depth and active faults, the surrounding rock of tunnels experiences significant high temperatures due to heat transfer from deep heat sources or high-temperature faults. The resulting high ground temperature problem is a typical technical challenge, and tunnel temperature model testing is an important method for studying high-ground-temperature tunnels.

[0004] Currently, tunnel temperature model tests are mainly small-scale similar model tests, primarily simulating the heating process using internal heat sources. While using internal heat sources to simulate the heating process in model tests can effectively simulate the three-dimensional temperature field of unexcavated rock masses in tunnel engineering, it does not adequately simulate the changes in the three-dimensional temperature field after rock mass excavation. Furthermore, small-scale similar model tests have relatively large errors. Large-scale similar model tests and heat dissipation model tests simulating the surrounding rock after excavation are currently lacking, which is detrimental to engineering research. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a multi-application scenario tunnel temperature model test system and method, which is highly versatile, reusable, easy to install and dismantle, and can be configured with different heating and ventilation modes according to test requirements, making it applicable to various tunnel temperature model test conditions.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a tunnel temperature model test system for multiple application scenarios.

[0008] A multi-application scenario tunnel temperature model test system includes: a model frame structure, a temperature control mechanism, a ventilation mechanism, and temperature and water pressure sensors;

[0009] The model frame structure is used to fix the main tunnel structure and the guide structure. The model frame structure has multiple positioning holes. The temperature control mechanism is used to control the internal and external temperature of the experimental system. The ventilation mechanism is used to ventilate the guide structure.

[0010] The model frame structure includes: a frame, a fixing frame, temperature measuring holes, and an acrylic plate. Each side of the frame is fixed with a heat insulation plate. The fixing frame is fixed to the side of the frame. An acrylic plate is fixed inside the fixing frame. Multiple temperature measuring holes communicating with the internal space of the frame are opened on the acrylic plate.

[0011] As a further limitation of the first aspect of the present invention, the temperature control mechanism includes an internal and external heat source control platform, an internal heat source, an internal heat source water pipe, an external heat source, and an external heat source water pipe. The internal heat source is fixed to the bottom of the frame, and the external heat source is placed on one side of the fixed frame. The internal and external heat source control platform is connected to the internal heat source through the internal heat source water pipe, and the internal and external heat source control platform is connected to the external heat source through the external heat source water pipe.

[0012] As a further limitation of the first aspect of the invention, the internal heat source is fixed to the bottom of the frame by bolts.

[0013] As a further limitation of the first aspect of the present invention, the flat guide structure is a steel structure, and the interior of the flat guide structure is filled with heat insulation material.

[0014] As a further limitation of the first aspect of the present invention, the frame is a steel structure frame and the fixing frame is a steel structure fixing frame.

[0015] As a further limitation of the first aspect of the present invention, the ventilation mechanism includes a blower, a power supply pipe and a wind speed control platform. The blower is fixed at the opening of the flat guide structure, and the wind speed control platform is connected to the blower through the power supply pipe and is used to control the wind speed of the blower by adjusting the wind speed adjustment knob.

[0016] As a further limitation of the first aspect of the invention, the blower is fixed to the opening of the flat guide structure by bolts.

[0017] As a further limitation of the first aspect of the present invention, the temperature and water pressure sensor is fixed inside the test system through positioning holes on the model frame structure.

[0018] As a further limitation of the first aspect of the present invention, the temperature and water pressure sensor includes: a glass tube, a rubber hose, a thin-walled steel pipe and a sensor probe, wherein the sensor probe is used to monitor the water pressure at the location buried inside the test system.

[0019] The glass straw is connected to the rubber hose, which is fitted onto the thin-walled steel tube. A sensor probe is connected to the thin-walled steel tube. When water flows through, the water pressure passes through the sensor probe's aperture in the form of a liquid column, enters the thin-walled steel tube and the rubber hose, and is finally displayed on the glass tube. The sensor probe contains a temperature sensor.

[0020] Secondly, the present invention provides a test method for tunnel temperature model in multiple application scenarios.

[0021] A method for testing tunnel temperature models in multiple application scenarios, utilizing the multi-application scenario tunnel temperature model testing system described in the first aspect of this invention, includes the following steps:

[0022] Adjust the diameter, length, and position of the guide structure and the main tunnel structure according to the test requirements;

[0023] According to the test requirements, adjust the number and location of the internal heat sources, and fix the internal heat sources in different locations inside the test system with bolts.

[0024] Adjust the number and location of temperature and water pressure sensors inside the test system according to the test requirements;

[0025] Before heating the model, the interior of the flat guide structure is filled with heat insulation material to ensure that the flat guide structure is in a heat-insulating state with the interior of the model. The temperature sensor is connected to the recorder. At the start of the test, the temperature control mechanism is turned on. According to the test heating plan, the internal heat source is adjusted to the preset temperature, and the external heat source is adjusted in real time according to the ambient temperature until the internal temperature of the test system reaches a stable state, thus completing one heating process of the model.

[0026] After the internal temperature of the test system reaches stability, remove the heat insulation material inside the flat guide structure, install the ventilation mechanism at the opening of the flat guide structure, connect the blower to the opening of the flat guide structure with bolts, turn on the ventilation mechanism, adjust the ventilation mechanism to the preset wind speed according to the test ventilation plan, monitor the temperature drop process inside the model until the temperature reaches stability, and complete one model heat dissipation process.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. The model frame structure of the present invention is a steel structure frame, which can easily adjust the length and height of the model, providing sufficient strength and meeting different test model sizes to satisfy various test requirements.

[0029] 2. The model frame structure of this invention is equipped with a guide structure and a main tunnel structure, which can be used to test the proportional reproduction of engineering examples. It is applicable to tunnel models of different forms and sizes, such as highway tunnels and subway tunnels, to meet different test needs.

[0030] 3. The model frame structure of the present invention is provided with multiple positioning holes, and heat insulation plates at different positions can be installed through different positioning holes to realize tunnel temperature model tests with different heat dissipation methods.

[0031] 4. The temperature control mechanism of the present invention includes two parts, an inner and an outer part. The heat source temperature of the model and the external ambient temperature can be controlled separately through the control platform, which facilitates precise control of the internal temperature and adaptive adjustment of the ambient temperature during the heating process.

[0032] 5. The ventilation mechanism of the present invention can adjust the wind speed by adjusting the voltage. The wind speed measurement sensor is provided at the opening of the flat guide structure to facilitate different test requirements.

[0033] 6. The temperature control mechanism of the present invention has its water pipe fixed to the outside of the model frame structure, which simplifies the complexity of the model test platform structure and improves the stability of the test platform.

[0034] 7. The temperature and water pressure sensor of the present invention is fixed inside the model frame structure, which can monitor the changes in temperature and water pressure inside the model in real time, and can meet the test requirements under different working conditions.

[0035] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0036] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0037] Figure 1 This is a schematic diagram of the overall structure of the test system according to one or more embodiments of the present invention;

[0038] Figure 2 This is an internal structural diagram of the test system according to one or more embodiments of the present invention;

[0039] Figure 3 This is a schematic diagram of the framework structure of one or more embodiments of the present invention;

[0040] Figure 4 This is a schematic diagram of a temperature control mechanism according to one or more embodiments of the present invention;

[0041] Figure 5 This is a schematic diagram of a ventilation mechanism according to one or more embodiments of the present invention;

[0042] Figure 6 This is a schematic diagram of a temperature and water pressure sensor according to one or more embodiments of the present invention;

[0043] Among them, 1. Model frame structure, 1-1. Steel structure frame, 1-2. Steel structure fixing frame, 1-3. Main hole structure, 1-4. Flat guide structure, 1-5. Temperature measuring hole, 1-6. Acrylic plate; 2. Temperature control mechanism, 2-1. Internal and external heat source control platform, 2-2. Internal heat source, 2-3. Internal heat source water pipe, 2-4. External heat source, 2-5. External heat source water pipe; 3. Ventilation mechanism, 3-1. Blower, 3-2. Power supply pipe, 3-3. Wind speed control platform; 4. Temperature and water pressure sensor, 4-1. Glass thin tube, 4-2. Rubber hose, 4-3. Thin-walled steel pipe, 4-4. Sensor probe. Detailed Implementation

[0044] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0045] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0046] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0047] Example 1:

[0048] In this implementation, such as Figure 1 and Figure 2 As shown, a tunnel temperature model test system is proposed, including a model frame structure 1, a temperature control mechanism 2, a ventilation mechanism 3, and a temperature and water pressure sensor 4. The model frame structure 1 is mainly used for fixing the main tunnel structure, the guide tunnel structure, the acrylic plates 1-6, and the ventilation mechanism 3, and also serves as an external heat insulation layer for the model (heat insulation plates are arranged around the model frame structure 1). The temperature control mechanism 2 is mainly used for heating the inside of the model frame structure 1 and controlling the stability of the external ambient temperature. The ventilation mechanism 3 is mainly used for ventilating the guide tunnel structures 1-4 inside the tunnel. The temperature and water pressure sensor 4 is mainly used for recording the internal temperature and monitoring the water pressure of the model frame structure 1.

[0049] like Figure 3 As shown, the tunnel frame structure 1 includes a steel frame 1-1, a steel fixing frame 1-2, a main tunnel structure 1-3, a guide structure 1-4, a temperature measuring hole 1-5, and an acrylic plate 1-6. In this implementation, the steel frame 1-1 serves as the fixing and insulation structure of the model as a whole, and can be replaced by the steel fixing frame 1-2 according to different test requirements.

[0050] In this implementation, the steel structure fixing frame 1-2 is used to fix the inner acrylic plate 1-6. The acrylic plate 1-6 has 11 temperature measuring holes 1-5 in the middle. The temperature measuring holes 1-5 can be set on the upper or lower part of the acrylic plate 1-6 according to different test requirements. The flat guide structure 1-4 is a steel structure, and the interior can be filled with heat insulation material to facilitate the simulation of the heating process and the heat dissipation process under ventilation conditions.

[0051] like Figure 4 As shown, the temperature control mechanism 2 includes an internal and external heat source control platform 2-1, an internal heat source 2-2, an internal heat source water pipe 2-3, an external heat source 2-4, and an external heat source water pipe 2-5. The internal heat source 2-2 is fixed to the bottom of the steel structure frame 1-1 by bolts. Since the steel structure frame 1-1 is provided with positioning holes at different locations, the position of the internal heat source 2-2 can be flexibly adjusted according to the test requirements. The external heat source 2-4 is arranged on one side of the steel structure frame 1-2. The external heat source 2-4 can be added or removed according to the test requirements. The internal heat source water pipe 2-3 and the external heat source water pipe 2-5 provide water circulation for the internal heat source 2-2 and the external heat source 2-4, respectively. The two interfaces of the internal and external heat source control platform 2-1 can control the temperature of the internal heat source 2-2 and the external heat source 2-4, respectively. The control platform interface can display the heat source temperature in real time and provide real-time feedback on the heat source status.

[0052] like Figure 5 As shown, the ventilation mechanism 3 includes a blower 3-1, a power supply pipe 3-2, and a wind speed control platform 3-3. The wind speed control platform 3-3 is connected to the blower 3-1 through the power supply pipe 3-2. The blower 3-1 is fixed to the opening of the flat guide structure 1-4 by bolts. The wind speed control platform 3-3 can control the wind speed by adjusting the wind speed adjustment knob.

[0053] like Figure 6 As shown, the temperature and water pressure sensor 4 includes a glass tube 4-1, a rubber hose 4-2, a thin-walled steel pipe 4-3, and a sensor probe 4-4. The glass tube 4-1 is connected to the rubber hose 4-2, one end of the thin-walled steel pipe 4-3 is connected to the rubber hose 4-2, and one end of the thin-walled steel pipe 4-3 is connected to the sensor probe 4-4. The temperature and water pressure sensor 4 is fixed inside the model through the positioning hole on the tunnel frame structure 1 and can be buried in various parts inside the model as needed.

[0054] In this implementation, the sensor probe 4-4 is used to monitor the water pressure at the buried location inside the model. When water flows through, the water pressure will pass through the aperture of the sensor probe 4-4 in the form of a liquid column, enter the thin-walled steel pipe 4-3, the rubber hose 4-2, and finally be displayed on the glass tube 4-1. The sensor probe 4-4 is equipped with a temperature sensor. When there is a need to detect the temperature, the temperature sensor can be connected to the paperless recorder to record the temperature at the buried location inside the model.

[0055] Example 2:

[0056] This implementation provides a method for using a tunnel temperature model test platform, mainly including: adjusting the guide tunnel structure and the main tunnel structure; adjusting the position of the internal heat source; adjusting the position of the temperature and water pressure sensors; heating and monitoring the model; and cooling and monitoring the model. The device dimensions are designed according to the test requirements, the main tunnel structure and the guide tunnel structure are adjusted, and the model frame structure is installed appropriately. After the model frame structure is installed, internal and external heat sources are installed at preset positions inside and outside the model frame structure, and connected to the external heat source control platform via water pipes. After the temperature control mechanism is installed, temperature and water pressure sensors are fixed at preset positions inside the model. After the pressure sensor is fixed, the inside of the model is filled with soil, and then the upper part of the model is insulated. After the upper part of the model frame is insulated, the retractable flat guide structure of the frame is filled with insulation material, and the inside of the model is heated by the temperature control mechanism. After the temperature inside the model stabilizes, the insulation material inside the retractable flat guide structure is removed, the ventilation mechanism is connected, and ventilation of the retractable flat guide structure is started. After the test is completed, heating of the internal and external heat sources of the model is stopped, the ventilation mechanism is retracted, the soil inside the model is removed, and the corresponding temperature heat source sensors are removed, completing one test process. Specifically, it includes the following five steps:

[0057] Step 1: Adjustment of the guide structure and the main tunnel structure. The diameter, length and position of the guide structure and the main tunnel structure vary greatly for different tests. Before the test begins, the diameter, length and position of the guide structure and the main tunnel structure should be adjusted in advance according to the test requirements.

[0058] Step 2: Adjust the position of the internal heat source. The heating position of the internal heat source varies greatly in different tests. Before the test, the number and position of the internal heat source should be adjusted in advance according to the test requirements. The internal heat source is fixed in different positions inside the model with bolts.

[0059] Step 3: Adjust the position of temperature and water pressure sensors. During the heating and ventilation process of the tunnel temperature model test, the monitoring positions of temperature and water pressure vary greatly for different tests. Before the test, the number and position of temperature and water pressure sensors inside the model should be adjusted in advance according to the test requirements.

[0060] Step 4: Model heating and monitoring. Before heating the model, fill the interior of the flat guide structure 1-4 with heat insulation material to ensure that the flat guide structure is in a heat-insulating state with the interior of the model. Connect the temperature sensor to the paperless recorder. At the start of the test, turn on the temperature control mechanism and adjust the internal heat source to the preset temperature according to the test heating plan. The external heat source is adjusted in real time according to the ambient temperature until the internal temperature of the model reaches a stable state, thus completing one heating process of the model.

[0061] Step 5: Model heat dissipation and monitoring. After the internal temperature of the model has stabilized, remove the heat insulation material inside the guide structure 1-4, install the ventilation mechanism at the opening of the guide structure, connect the blower to the opening of the guide structure with bolts, turn on the ventilation mechanism, adjust the ventilation mechanism to the preset wind speed according to the test ventilation plan, monitor the temperature drop process inside the model until the temperature stabilizes, and complete one model heat dissipation process.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A test method for tunnel temperature model in multiple application scenarios, characterized in that, A multi-application scenario tunnel temperature model test system is used, which includes: a model frame structure, a temperature control mechanism, a ventilation mechanism, and temperature and water pressure sensors; The model frame structure is used to fix the main tunnel structure and the guide structure. The model frame structure has multiple positioning holes. The temperature control mechanism is used to control the internal and external temperature of the experimental system. The ventilation mechanism is used to ventilate the guide structure. The model frame structure includes: a frame, a fixing frame, temperature measuring holes, and an acrylic plate. Each side of the frame is fixed with a heat insulation plate. The fixing frame is fixed to the side of the frame. An acrylic plate is fixed inside the fixing frame. Multiple temperature measuring holes communicating with the internal space of the frame are opened on the acrylic plate. The method includes the following procedures: Adjust the diameter, length, and position of the guide structure and the main tunnel structure according to the test requirements; According to the test requirements, adjust the number and location of the internal heat sources, and fix the internal heat sources in different locations inside the test system with bolts. Adjust the number and location of temperature and water pressure sensors inside the test system according to the test requirements; Before heating the model, the interior of the flat guide structure is filled with heat insulation material to ensure that the flat guide structure is in a heat-insulating state with the interior of the model. The temperature sensor is connected to the recorder. At the start of the test, the temperature control mechanism is turned on. According to the test heating plan, the internal heat source is adjusted to the preset temperature, and the external heat source is adjusted in real time according to the ambient temperature until the internal temperature of the test system reaches a stable state, thus completing one heating process of the model. After the internal temperature of the test system reaches stability, remove the heat insulation material inside the flat guide structure, install the ventilation mechanism at the opening of the flat guide structure, connect the blower to the opening of the flat guide structure with bolts, turn on the ventilation mechanism, adjust the ventilation mechanism to the preset wind speed according to the test ventilation plan, monitor the temperature drop process inside the model until the temperature reaches stability, and complete one model heat dissipation process.

2. The multi-application scenario tunnel temperature model test method as described in claim 1, characterized in that, The temperature control mechanism includes an internal and external heat source control platform, an internal heat source, an internal heat source water pipe, an external heat source, and an external heat source water pipe. The internal heat source is fixed to the bottom of the frame, and the external heat source is placed on one side of the fixed frame. The internal and external heat source control platform is connected to the internal heat source through the internal heat source water pipe, and the internal and external heat source control platform is connected to the external heat source through the external heat source water pipe.

3. The multi-application scenario tunnel temperature model test method as described in claim 2, characterized in that, The internal heat source is fixed to the bottom of the frame with bolts.

4. The multi-application scenario tunnel temperature model test method as described in claim 1, characterized in that, The guide structure is made of steel and filled with thermal insulation material.

5. The multi-application scenario tunnel temperature model test method as described in claim 1, characterized in that, The frame is a steel structure frame, and the fixing frame is a steel structure fixing frame.

6. The multi-application scenario tunnel temperature model test method as described in claim 1, characterized in that, The ventilation mechanism includes a blower, a power supply pipe, and a wind speed control platform. The blower is fixed at the opening of the flat guide structure, and the wind speed control platform is connected to the blower through the power supply pipe and is used to control the wind speed of the blower by adjusting the wind speed adjustment knob.

7. The multi-application scenario tunnel temperature model test method as described in claim 1, characterized in that, The blower is fixed to the opening of the flat guide structure with bolts.

8. The multi-application scenario tunnel temperature model test method as described in claim 1, characterized in that, The temperature and water pressure sensors are fixed inside the test system through positioning holes on the model frame structure.

9. The multi-application scenario tunnel temperature model test method as described in claim 1, characterized in that, The temperature and water pressure sensor includes: a glass tube, a rubber hose, a thin-walled steel tube, and a sensor probe. The sensor probe is used to monitor the water pressure at the location buried inside the test system. The glass straw is connected to the rubber hose, which is fitted onto the thin-walled steel tube. A sensor probe is connected to the thin-walled steel tube. When water flows through, the water pressure passes through the sensor probe's aperture in the form of a liquid column, enters the thin-walled steel tube and the rubber hose, and is finally displayed on the glass tube. The sensor probe contains a temperature sensor.

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