Multi-application scene tunnel temperature model test system and method

Abstract

The invention provides a multi-application scene tunnel temperature model test system and method, and the 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 the main tunnel structure and the parallel guide structure, a plurality of positioning holes are formed in the model frame structure, the temperature control mechanism is used for controlling internal and external temperatures of the experiment system, and the ventilation mechanism is used for ventilating the parallel guide structure; the device is high in universality, reusable and convenient to mount and dismount, different heating and ventilation modes can be set according to test requirements, and the device can be suitable for various tunnel temperature model test working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel model testing, and in particular to a multi-application scenario tunnel temperature model testing system and method. Background Art

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

[0003] At present, the construction of railway tunnels and highway tunnels has entered a period of rapid development. Due to the complex terrain and special environmental factors, railway lines mostly use long and deep buried tunnels to cross mountainous areas. However, due to the strong plate tectonic activities, complex geological conditions and widespread distribution of underground hot water in these areas, tunnel construction faces a series of engineering and technical difficulties. Affected by the burial depth and active faults, the surrounding rock of the tunnel produces obvious high temperature under the heat transfer of deep heat sources or high-temperature faults. The resulting high geothermal problem is one of the typical technical difficulties. Tunnel temperature model test is an important way to study high geothermal tunnels.

[0004] At present, tunnel temperature model tests are mainly small-scale similar model tests, which mainly simulate the heating process of internal heat sources. The use of internal heat sources to simulate the heating process in the model experiment can better simulate the three-dimensional temperature field of the unexcavated rock mass in the tunnel project, but it does not simulate the change process of the three-dimensional temperature field after the rock mass is excavated. In addition, the small-scale similar model test has a large error. Large-scale similar model tests and model tests simulating heat dissipation after surrounding rock excavation are currently lacking, which is not conducive to the research on the project. Summary of the invention

[0005] In order to address the deficiencies in the prior art, the present invention provides a tunnel temperature model test system and method for multiple application scenarios, which has strong versatility, is reusable, and is easy to install and dismantle. Different heating and ventilation forms can be set according to test requirements, and can be applied to a variety of tunnel temperature model test conditions.

[0006] In order to achieve the above object, 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, comprising: a model frame structure, a temperature control mechanism, a ventilation mechanism and a temperature and water pressure sensor;

[0009] The model frame structure is used to fix the positive hole structure and the flat guide structure. A plurality of positioning holes are opened on the model frame structure. 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 flat guide structure.

[0010] The model frame structure includes: a frame, a fixing frame, temperature measuring holes and an acrylic plate. A heat insulation plate is fixed to each side of the frame. The fixing frame is fixed to the side of the frame. An acrylic plate is fixed inside the fixing frame. The acrylic plate is provided with a plurality of temperature measuring holes connected to the internal space of the frame.

[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, 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 present 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 duct and a wind speed control platform. The blower is fixed at the hole of the flat guide structure. The wind speed control platform is connected to the blower through the power supply duct 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 present invention, the blower is fixed to the hole 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 sensors are 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 comprises: a glass capillary, a rubber hose, a thin-walled steel pipe and a sensor probe, the sensor probe being used to monitor the water pressure at a buried position inside the test system;

[0019] The glass straw is connected to a rubber hose, the rubber hose is sleeved on a thin-walled steel pipe, and a sensor probe is connected to the thin-walled steel pipe. When water flows through, the water pressure passes through the pores of the sensor probe in the form of a liquid column, enters the thin-walled steel pipe and the rubber hose, and finally displays on the glass tube. A temperature sensor is installed in the sensor probe.

[0020] In a second aspect, the present invention provides a tunnel temperature model test method for multiple application scenarios.

[0021] A multi-application scenario tunnel temperature model test method, using the multi-application scenario tunnel temperature model test system according to the first aspect of the present invention, comprises the following process:

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

[0023] According to the test requirements, adjust the number and position of the internal heat sources, and fix the internal heat sources at different positions inside the test system by bolts;

[0024] According to the test requirements, adjust the number and location of temperature and water pressure sensors inside the test system;

[0025] Before heating the model, fill the flat guide structure with heat-insulating material to insulate the flat guide structure from the inside of the model. Connect the temperature sensor to the recorder. At the beginning of the test, turn on the temperature control mechanism. According to the test heating plan, adjust the internal heat source to the preset temperature. The external heat source is adjusted in real time according to the ambient temperature until the internal temperature of the test system reaches stability. This completes the heating process of the model.

[0026] After the internal temperature of the test system reaches stability, remove the insulation material in the flat guide structure, install the ventilation mechanism to the hole of the flat guide structure, connect the blower to the hole 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 the model heat dissipation process.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[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, can provide sufficient strength and meet the different test model sizes, and meet a variety of test requirements.

[0029] 2. The model frame structure of the present invention is provided with a flat guide structure and a main tunnel structure, which can be used to test the proportional restoration of engineering examples. It can be applied to tunnel models of different forms and sizes of highway tunnels and subway tunnels to meet different test needs.

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

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

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

[0033] 6. The water conduit of the temperature control mechanism of the present invention is fixed on 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 sensors of the present invention are fixed inside the model frame structure, which can monitor the changes in both the 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 present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

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

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

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

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

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

[0042] Figure 6 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 capillary, 4-2. Rubber hose, 4-3. Thin-walled steel pipe, 4-4. Sensor probe. DETAILED DESCRIPTION

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

[0045] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0046] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0047] Embodiment 1:

[0048] In this implementation, if 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 flat guide structure, the acrylic plates 1-6 and the ventilation mechanism 3, and at the same time serves as an insulation layer on the outside of the model (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 environmental temperature; the ventilation mechanism 3 is mainly used for ventilating the flat guide structures 1-4 inside the tunnel, and the temperature and water pressure sensor 4 is mainly used for recording the internal temperature of the model frame structure 1 and monitoring the water pressure.

[0049] like Figure 3 As shown, the tunnel frame structure 1 includes a steel structure frame 1-1, a steel structure fixing frame 1-2, a main tunnel structure 1-3, a flat guide structure 1-4, a temperature measuring hole 1-5 and an acrylic plate 1-6. In this implementation, the steel structure frame 1-1 serves as the fixing structure and heat insulation structure of the entire model, and can be replaced by the steel structure 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. Eleven temperature measuring holes 1-5 are provided in the middle of the acrylic plate 1-6. The temperature measuring holes 1-5 can be set at 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-insulating materials 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 guide pipe 2-3, an external heat source 2-4 and an external heat source water guide pipe 2-5; the internal heat source 2-2 is fixed to the bottom of the steel structure frame 1-1 by bolts. Since positioning holes are provided at different positions of the steel structure frame 1-1, 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 fixing frame 1-2. The external heat source 2-4 can be increased or reduced according to the test requirements. The internal heat source water guide pipe 2-3 and the external heat source water guide pipe 2-5 provide water guide 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 hole 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 capillary 4-1, a rubber hose 4-2, a thin-walled steel pipe 4-3, and a sensor probe 4-4. The glass capillary 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 position inside the model. When water flows through, the water pressure will pass through the pores 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 is connected to a paperless recorder to record the temperature of the buried position inside the model.

[0055] Embodiment 2:

[0056] The present implementation provides a method for using a tunnel temperature model test platform, which mainly includes: adjusting the flat guide structure and the main tunnel structure, adjusting the position of the internal heat source, adjusting the position of the temperature and water pressure sensor, heating and monitoring the model, and heat dissipation and monitoring the model; designing the device size according to the test requirements, adjusting the main tunnel structure and the flat guide structure, and reasonably installing the model's frame structure; after the model frame structure is installed, installing the internal heat source and the external heat source at the preset positions inside and outside the model frame structure, and connecting them to the external heat source control platform through a water pipe; after the temperature control mechanism is installed, fixing the temperature and water pressure sensor at the preset position inside the model; the temperature water After the pressure sensor is fixed, fill the inside of the model with soil, and after the filling is completed, the upper part of the model is insulated; after the insulation treatment of the upper part of the model frame is completed, the frame retractable flat guide structure is filled with insulation material, and the inside of the model begins to heat up through the temperature control mechanism; after the temperature inside the model reaches a stable state, the insulation material inside the retractable flat guide structure is removed, the ventilation mechanism is connected, and the retractable flat guide structure begins to be ventilated; after the test is completed, the heating of the internal and external heat sources of the model is stopped, the ventilation mechanism is retracted, the filling inside the model is dug out, and the corresponding temperature heat source sensor is removed to complete a test process, which specifically includes the following five steps:

[0057] Step 1: Adjustment of the flat guide structure and the main tunnel structure. The diameter, length and position of the flat guide structure and the main tunnel structure for different tests are quite different. Before the test begins, the diameter, length and position of the flat 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 in different tests is quite different. Before the test, the number and position of the internal heat source should be adjusted in advance according to the test requirements, and the internal heat source should be fixed at different positions inside the model by 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 in different tests are quite different. 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: Heating and monitoring the model. Before heating the model, fill the flat guide structure 1-4 with insulation material to make the flat guide structure and the inside of the model in an insulation state. Connect the temperature sensor to the paperless recorder. At the beginning of the test, turn on the temperature control mechanism. According to the test heating plan, adjust the internal heat source to the preset temperature. The external heat source is adjusted in real time according to the ambient temperature until the internal temperature of the model reaches stability. The heating process of the model is completed once.

[0061] Step 5: Heat dissipation and monitoring of the model. After the internal temperature of the model reaches stability, remove the insulation materials in the flat guide structures 1-4, install the ventilation mechanism to the hole of the flat guide structure, connect the blower to the hole of the flat guide structure through bolts, turn on the ventilation mechanism, adjust the ventilation mechanism to the preset wind speed according to the experimental ventilation plan, monitor the temperature drop process inside the model until the temperature reaches stability, and complete a model heat dissipation process.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-application scenario tunnel temperature model test system, characterized in that: include: Model frame structure, temperature control mechanism, ventilation mechanism and temperature and water pressure sensors; The model frame structure is used to fix the positive hole structure and the flat guide structure. A plurality of positioning holes are opened on the model frame structure. 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 flat guide structure. The model frame structure includes: a frame, a fixing frame, temperature measuring holes and an acrylic plate. A heat insulation plate is fixed to each side of the frame. The fixing frame is fixed to the side of the frame. An acrylic plate is fixed inside the fixing frame. The acrylic plate is provided with a plurality of temperature measuring holes connected to the internal space of the frame.

2. The multi-application scenario tunnel temperature model test system according to 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 guide pipe, an external heat source and an external heat source water guide 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 guide pipe, and the internal and external heat source control platform is connected to the external heat source through the external heat source water guide pipe.

3. The multi-application scenario tunnel temperature model test system according to claim 2, characterized in that: The internal heat source is bolted to the bottom of the frame.

4. The multi-application scenario tunnel temperature model test system according to claim 1, characterized in that: The flat guide structure is a steel structure, and the interior of the flat guide structure is filled with insulation materials.

5. The multi-application scenario tunnel temperature model test system according to 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 system according to claim 1, characterized in that: The ventilation mechanism includes a blower, a power supply pipeline and a wind speed control platform. The blower is fixed at the hole of the flat guide structure. The wind speed control platform is connected to the blower through the power supply pipeline 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 system according to claim 1, characterized in that: The blower is fixed to the hole of the flat guide structure by bolts.

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

9. The multi-application scenario tunnel temperature model test system according to claim 1, characterized in that: The temperature and water pressure sensor comprises: a glass capillary, 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 buried position inside the test system; The glass straw is connected to a rubber hose, the rubber hose is sleeved on a thin-walled steel pipe, and a sensor probe is connected to the thin-walled steel pipe. When water flows through, the water pressure passes through the pores of the sensor probe in the form of a liquid column, enters the thin-walled steel pipe and the rubber hose, and finally displays on the glass tube. A temperature sensor is installed in the sensor probe.

10. A tunnel temperature model test method for multiple application scenarios, characterized in that: The multi-application scenario tunnel temperature model test system according to any one of claims 1 to 9 comprises the following process: Adjust the diameter, length and position of the flat guide structure and the main tunnel structure according to the test requirements; According to the test requirements, adjust the number and position of the internal heat sources, and fix the internal heat sources at different positions inside the test system by bolts; According to the test requirements, adjust the number and location of temperature and water pressure sensors inside the test system; Before heating the model, fill the flat guide structure with heat-insulating material to insulate the flat guide structure from the inside of the model. Connect the temperature sensor to the recorder. At the beginning of the test, turn on the temperature control mechanism. According to the test heating plan, adjust the internal heat source to the preset temperature. The external heat source is adjusted in real time according to the ambient temperature until the internal temperature of the test system reaches stability. This completes the heating process of the model. After the internal temperature of the test system reaches stability, remove the insulation material in the flat guide structure, install the ventilation mechanism to the hole of the flat guide structure, connect the blower to the hole 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 the model heat dissipation process.

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