CN112613193A - Method and device for simulating ventilation effect of deep-buried ultra-long tunnel - Google Patents
Method and device for simulating ventilation effect of deep-buried ultra-long tunnel Download PDFInfo
- Publication number
- CN112613193A CN112613193A CN202110002188.3A CN202110002188A CN112613193A CN 112613193 A CN112613193 A CN 112613193A CN 202110002188 A CN202110002188 A CN 202110002188A CN 112613193 A CN112613193 A CN 112613193A
- Authority
- CN
- China
- Prior art keywords
- tunnel
- temperature
- research
- model
- research area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
- G06T17/05—Geographic models
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/08—Fluids
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/08—Thermal analysis or thermal optimisation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Theoretical Computer Science (AREA)
- Software Systems (AREA)
- General Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Computer Graphics (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Ventilation (AREA)
Abstract
The invention discloses a method and a device for simulating the ventilation effect of a deeply buried ultra-long tunnel, wherein the method comprises the steps of obtaining background information of a research area; establishing a three-dimensional geological model of a research area according to background data; determining initial conditions of seepage and temperature of the three-dimensional geological model according to the water level and geothermal field distribution of the research area; determining seepage and temperature boundary conditions of the three-dimensional geological model according to the flow characteristics and supply and drainage conditions of geothermal fluid in a research area; simplifying the tunnel into a linear geometric model, and adding the linear geometric model of the tunnel into a three-dimensional geological model of a research area to form a research model for simulating the ventilation effect of the tunnel; setting a temperature boundary condition and an air inflow and outflow boundary condition for a tunnel vent in the research model; constructing a temperature periodic function for describing the change of the inlet temperature along with time for the tunnel inlet in the research model; and predicting the temperature change of the tunnel and surrounding rocks around the tunnel and optimizing the ventilation frequency and speed by utilizing the research model based on the initial condition, the boundary condition and the temperature periodic function.
Description
Technical Field
The invention relates to the field of tunnel ventilation simulation analysis and simulation, in particular to a method and a device for simulating the ventilation effect of a deeply-buried ultra-long tunnel, a storage medium and electronic equipment.
Background
Temperature is an important environmental factor affecting tunnel design, construction and maintenance, particularly in high or cold regions. For example: the diversion tunnel of the Sinkiang Qihothe Tal hydropower station has a temperature as high as 98 ℃ in the construction period, while the Ganlongla tunnel in Tibet suffers from a freezing period of about 8 months every year, and the lowest temperature is-28 ℃. Since the change of the environmental temperature causes the temperature change of the tunnel lining and surrounding rocks, high temperature or freezing not only reduces the service life of the tunnel decoration material and lining in the extreme temperature region, but also has adverse effects on the physiology and psychology of constructors, passengers and maintenance personnel. Therefore, the understanding of the temperature distribution in the tunnel and the surrounding rock is of great significance to the design of the insulating layer and the mechanical ventilation scheme.
Currently, numerical simulation is widely used to understand and predict temperature field changes in tunnels and surrounding rocks. However, the difference between the tunnel diameter (about ten meters) and the tunnel length (several kilometers to several tens of kilometers) brings great difficulty to grid division and calculation, so that the current research is to simulate a two-dimensional model of the whole tunnel or a three-dimensional model of a small section of tunnel, which is difficult to meet the requirements of actual engineering.
Because the ultra-long deep-buried tunnel often passes through different geological units and faults in the axial direction, how to build a three-dimensional model including the whole tunnel to predict the temperature change in the tunnel and surrounding rocks and optimize the ventilation frequency and speed is a technical problem to be solved urgently at present.
Disclosure of Invention
In view of the above problems, in order to overcome the shortcomings of the above schemes, the present invention provides a method and an apparatus for simulating the ventilation effect of a deeply buried ultra-long tunnel, a storage medium and an electronic device.
According to one embodiment of the invention, the simulation method of the ventilation effect of the deep-buried ultra-long tunnel comprises the following steps:
acquiring background data of a research area;
establishing a three-dimensional geological model of the research area according to background data of the research area;
determining initial conditions of seepage and temperature of the three-dimensional geological model according to the water level and geothermal field distribution of the research area;
determining seepage and temperature boundary conditions of the three-dimensional geological model according to the flow characteristics and supply and drainage conditions of geothermal fluid in a research area;
simplifying the tunnel into a linear geometric model according to the trend of the tunnel in the research area, and adding the linear geometric model of the tunnel into a three-dimensional geological model of the research area to form a research model for simulating the ventilation effect of the tunnel;
setting a temperature boundary condition and an air inflow and outflow boundary condition for a tunnel vent in the research model according to the temperature distribution and the air flow condition of the tunnel vent in the research area;
according to the temperature distribution condition of the tunnel entrance in the research area, constructing a temperature periodic function for describing the change of the entrance temperature along with time for the tunnel entrance in the research model;
and predicting the temperature change of the tunnel and surrounding rocks around the tunnel and optimizing the ventilation frequency and speed by utilizing the research model based on the initial condition, the boundary condition and the temperature periodic function.
According to an embodiment of the present invention, the background data of the research area includes geological background data, geothermy geological background data and hydrogeological background data.
According to an embodiment of the present invention, the creating a three-dimensional geological model of the research area according to the background information of the research area includes:
determining the lithology, thickness, distribution and fault distribution of each stratum of the research area by analyzing geological background data of the research area;
determining the depth of a constant temperature zone, the geothermal gradient of a heat storage cover layer, the temperature of heat storage and the range of a geothermal abnormal area of the research area by analyzing the geothermal geological background data of the research area;
determining the correlation between geothermal fluid and atmospheric precipitation, normal-temperature underground water and geothermal fluid among different heat storages by analyzing hydrogeological background data of a research area, and analyzing the source, storage, transportation and excretion conditions of the geothermal fluid;
a parametric surface of interfaces of layers of the study area is constructed based on results determined by analyzing background data of the study area, thereby establishing a three-dimensional geological model of the study area.
According to an embodiment of the present invention, the linear geometric model is a one-dimensional linear geometric model.
According to an embodiment of the present invention, the setting of the temperature boundary condition and the air inflow and outflow boundary condition for the tunnel vent in the research model according to the temperature distribution and the air flow condition of the tunnel vent in the research area comprises: and adopting an equivalent heat exchange coefficient to represent the heat exchange process of air in the tunnel, a secondary lining, a heat insulation layer, a primary lining and surrounding rocks of the tunnel.
According to an embodiment of the present invention, the constructing a temperature periodic function for describing the variation of the entrance temperature with time for the tunnel entrance in the research model according to the temperature distribution of the tunnel entrance in the research area includes:
and constructing a temperature periodic function for describing the change of the inlet temperature along with time for the tunnel inlet in the research model by combining the change of the average air temperature at the location of the research area.
According to an embodiment of the invention, the change in average air temperature at the location of the aforementioned study area is a change in monthly average air temperature at the location of the study area.
In addition, the invention also provides a simulation device for the ventilation effect of the deep-buried ultra-long tunnel, which comprises:
the background information acquisition module is used for acquiring background information of the research area;
the geological model building module is used for building a three-dimensional geological model of the research area according to background data of the research area;
the initial condition analysis module is used for determining the initial conditions of seepage and temperature of the three-dimensional geological model according to the water level and geothermal field distribution of the research area;
the boundary condition analysis module is used for determining seepage and temperature boundary conditions of the three-dimensional geological model according to the flow characteristics of geothermal fluid in the research area and the supply and drainage conditions;
the ventilation model establishing module is used for simplifying the tunnel into a linear geometric model according to the trend of the tunnel in the research area, and adding the linear geometric model of the tunnel into a three-dimensional geological model of the research area to form a research model for simulating the ventilation effect of the tunnel;
the ventilation condition analysis module is used for setting a temperature boundary condition and an air inflow and outflow boundary condition for a tunnel vent in the research model according to the temperature distribution and the air flow condition of the tunnel vent in the research area;
the entrance temperature analysis module is used for constructing a temperature periodic function for describing the change of entrance temperature along with time for the tunnel entrance in the research model according to the temperature distribution condition of the tunnel entrance in the research area;
and the tunnel ventilation simulation module is used for predicting the temperature change of the tunnel and the surrounding rocks around the tunnel and optimizing the ventilation frequency and speed by utilizing the research model based on the initial condition, the boundary condition and the temperature periodic function.
In addition, the present invention also provides a storage medium having a computer program stored thereon, wherein the storage medium stores a computer program, and the computer program can be executed by one or more processors to implement the simulation method for the ventilation effect of the deeply buried ultra-long tunnel as described above.
In addition, the present invention also provides an electronic device, which includes a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the method for simulating the ventilation effect of the deeply buried ultra-long tunnel is implemented.
Compared with the prior art, one or more embodiments of the above scheme of the invention can have the following advantages or beneficial effects:
according to one aspect of the invention, a method for simulating the ventilation effect of a deep-buried ultra-long tunnel is provided, which comprises the following steps: acquiring background data of a research area, wherein the background data comprises geological background, geothermy geological background and hydrogeological background data, and establishing a three-dimensional geological model of the research area according to the background data; analyzing and determining initial conditions of seepage and temperature of the three-dimensional geological model according to a water level and geothermal field distribution diagram of a research area; analyzing and determining seepage and temperature boundary conditions of the three-dimensional geological model according to the flow characteristics and supply and drainage conditions of geothermal fluid in a research area; simplifying the tunnel into a one-dimensional linear geometry according to the tunnel trend, and adding the one-dimensional linear geometry of the tunnel into the three-dimensional geological model; setting temperature and inflow and outflow boundary conditions of air for a ventilation opening of the tunnel respectively, wherein the heat exchange process of the air in the tunnel with the secondary lining, the heat insulation layer, the primary lining and the surrounding rock adopts equivalent heat exchange coefficient consideration; the tunnel entrance is provided with a periodic function of temperature variation over time, wherein the periodic function can take into account the variation of the average temperature of the local month. Therefore, a three-dimensional model including the whole tunnel is established to predict the temperature change of the tunnel and the surrounding rocks and optimize the ventilation frequency and speed.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1(a) - (c) show tunnel structure diagrams of embodiments of the present invention;
FIG. 2 shows a scaled tunnel model schematic of the tunnel of FIG. 1;
FIG. 3 shows a schematic of the model initial temperature of FIG. 2;
FIG. 4 shows the tunnel inlet air temperature of FIG. 1 over time;
FIGS. 5(a) - (b) show the fitted curves of the surrounding rock temperatures of different sections of the tunnel in FIG. 1;
FIG. 6 shows the fitted curve of air temperature within the tunnel of FIG. 1;
fig. 7 shows a fitted curve of the internal air temperature of the tunnel of fig. 1 over different time periods.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following will describe in detail an implementation method of the present invention with reference to the accompanying drawings and embodiments, so that how to apply technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented.
It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Certain embodiments of the invention now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. Indeed, various embodiments of the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements.
In this specification, the various embodiments described below which are meant to illustrate the principles of this invention are illustrative only and should not be construed in any way to limit the scope of the invention. The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention as defined by the claims and their equivalents. The following description includes various specific details to aid understanding, but such details are to be regarded as illustrative only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Moreover, descriptions of well-known functions and constructions are omitted for clarity and conciseness. Moreover, throughout the drawings, the same reference numerals are used for similar functions and operations.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
Example one
The invention discloses a simulation method of the ventilation effect of a deep-buried ultra-long tunnel, which specifically comprises the following steps:
step S1: background data of the research area, including geological background data, geothermy geological background data and hydrogeological background data, are obtained, and a three-dimensional geological model of the research area is established according to the background data.
Step S1 specifically includes:
step S101: background data of a research area, including geological background, geothermy geological background and hydrogeological background data, are obtained.
Specifically, the geological background, the geothermy geological background and the hydrogeological background can be acquired through geological exploration or data collection and the like.
Step S102: and establishing a three-dimensional geological model of the research area according to the background data.
Specifically, lithology, thickness, distribution of each stratum in the research area, distribution of faults thereof and the like can be determined by analyzing geological background data; the depth of a constant temperature zone, the geothermal gradient of a heat storage cover layer, the temperature of heat storage and the range of a geothermal abnormal area can be determined by analyzing geothermal geological background data; the interrelation of the geothermal fluid and atmospheric precipitation, normal-temperature underground water and geothermal fluid among different thermal reservoirs can be determined by analyzing hydrogeological background data, and the source, reservoir, migration and discharge conditions of the geothermal fluid are analyzed. Comprehensively analyzing background data, determining the range of a research area, constructing a parameterized surface of each interface by importing interpolation data of a stratum interface and a fault in COMSOL Multiphysics software, and establishing a three-dimensional geological model of the research area through a series of geometric operations such as mutual cutting and deletion among the stratum interface, the fault and a model entity.
Step S2: analyzing and determining initial conditions of seepage and temperature of the three-dimensional geological model according to a water level and geothermal field distribution diagram of the research area.
Specifically, the contour distribution map of the water level and the ground temperature field is subjected to gridding processing, the obtained interpolation data is extracted, and then the interpolation data is introduced into COMSOL Multiphysics software in the form of an interpolation function to be called.
Step S3: and analyzing and determining seepage and temperature boundary conditions of the three-dimensional geological model according to the flow characteristics of geothermal fluid in the research area and the supply and drainage conditions.
Step S4: and simplifying the tunnel in the research area into a linear geometric model, and adding the linear geometric model of the tunnel into the three-dimensional geological model to form a research model for simulating the ventilation effect of the tunnel.
Specifically, in this step, fig. 1 is a schematic diagram of a tunnel structure, where fig. 1(a) is a schematic diagram of an entire tunnel structure, fig. 1(a) is a schematic diagram of a cross section of the tunnel structure, and fig. 1(a) is a schematic diagram of a longitudinal section of the tunnel structure. Fig. 2 is a schematic diagram of a reduced-scale tunnel model, in which the tunnel is simplified to a one-dimensional linear geometry according to the tunnel trend.
Step S5: and respectively setting temperature and inflow and outflow boundary conditions of air for the ventilation opening of the tunnel, wherein the heat exchange process of the air in the tunnel with the secondary lining, the heat preservation layer, the primary lining and the surrounding rock can be described by utilizing an equivalent heat exchange coefficient.
For example: factors such as the shape, the sectional area, the thicknesses of the secondary lining, the heat insulation layer and the primary lining material, the thermal conductivity, the thermodynamic property of air, the wind speed, the contact surface property with surrounding rock and the like of the tunnel are included in the equivalent heat exchange coefficient.
Step S6: a temperature periodic function describing the inlet temperature over time is constructed for the tunnel inlet, which may take into account, for example, the change in the local monthly average air temperature.
Step S7: the study model is used to predict the temperature changes of the tunnel and its surrounding rock, optimizing ventilation frequency and speed based on the previously determined initial conditions, boundary conditions and temperature periodic functions.
Further, on the basis of the above embodiment, the equivalent heat exchange coefficient heqIs calculated by a first formula, wherein the first formula is as follows:
wherein r is0Is the radius of a circular tunnel, r1Is the outside diameter of the second liner, r2Is the outer diameter of the heat-insulating layer r3Is the outer diameter of the primary lining, ksIs the thermal conductivity, k, of the two-liner materialiIs the thermal conductivity coefficient, k, of the material of the insulating layerpIs the thermal conductivity of the primary lining material, wsIs a thickness of two liners, wiIs the thickness of the heat-insulating layer, wpIs the thickness of the primary lining, Z0Is the tunnel perimeter, Z1Outer perimeter of secondary liner, Z2The outer perimeter of the insulating layer, Z3Is the outer perimeter of the primary lining, hintThermal film resistance h generated for air flow in tunnelintIs calculated by a second formula, wherein the second formula is as follows:
wherein Nu is Nussel number, kaIs the thermal conductivity of air, dhHydraulic diameter of the tunnel, dhIs calculated by a third formula, wherein the third formula is as follows:
wherein A is the cross-sectional area of the tunnel.
Further, in this embodiment, the air temperature in the tunnel may be calculated, and the calculation method of the air temperature in the tunnel includes:
the energy equation of the linear geometry of the incompressible gas through the one-dimensional tunnel is:
where ρ isaIs the density of air, Cp,aIs the specific heat capacity of air, u is the ventilation speed along the axial direction of the tunnel, TaIs the air temperature, t is the time, fDFor Darcy friction factor, the Haaland (Harrand) equation can be expressed as:
where e is the surface roughness and Re is the reynolds number, which can be expressed as:
wherein, muaIs the kinetic viscosity of air.
QwallThe heat exchange between the air in the tunnel and the surrounding rock through the secondary lining, the heat preservation layer and the primary lining can be expressed as follows:
Qwall＝heq(Tr-Ta)
wherein, TrIs the surrounding rock temperature.
Further, in this embodiment, the temperature change in the surrounding rock can be calculated, and when there is groundwater flow in the surrounding rock, the mass balance equation can be expressed as:
where φ is the rock porosity, ρwIs the density of water, QmAs a source of mass, u is the darcy velocity field, which can be expressed as:
wherein, k is rock permeability, muwIs the dynamic viscosity of water, P is the water pressure, g is the gravitational acceleration, and z is the vertical coordinate (positive upward).
Conservation of energy in the surrounding rock can be expressed as:
wherein, Cp,wIs the specific heat capacity of water, Q is the heat source, (rho C)p)effFor effective volumetric heat capacity, it can be expressed as:
(ρCp)eff＝(1-φ)ρrCp,r+φρwCp,w
where ρ isrIs rock density, Cp,rIs the specific heat capacity of the rock.
keffFor effective thermal conductivity, it can be expressed as:
keff＝(1-φ)kr+φkw
further, in this embodiment, the fluid flow and heat transfer process in the fault can be calculated, including:
the fluid flow process in a fault is expressed by Darcy's law in the form of tangency:
wherein q isfrVolume flow in fault, κfrIs the permeability of the fault, dfrIn order to be the opening degree of the fault,
is a gradient operator on the fault section.
The continuity equation in a fault is expressed as:
the conservation of energy in a fault can be expressed as:
the rationality and accuracy of the simplified model obtained by simplifying the tunnel into a one-dimensional linear geometry according to the present embodiment are verified below. The tunnel model is simplified based on an indoor scale test, and the size of the model is 800cm multiplied by 300cm multiplied by 150 cm. The tunnel radius is 104mm, and the tunnel wall thickness is 20 mm. And 9 measuring points for monitoring the temperature change of the air in the tunnel are arranged every 100cm along the axial direction of the tunnel. And 8 groups of measuring points for monitoring the temperature change of the surrounding rock are arranged at intervals of 100cm along the longitudinal direction of the tunnel, and each group comprises 18 measuring points. The distance is 15cm, and the particles are uniformly distributed in the surrounding rock, as shown in figure 2. The tunnel model is made of a mixture of gypsum and fabric, and the surrounding rock is backfilled by sand gravel. In addition, a temperature sensor was installed at a distance of 90cm from the tunnel lining, and surrounding rocks were heated using a heat pipe, and the initial temperature field distribution was as shown in fig. 3. The inlet wind speed is 0.365m/s, and the change curve of the wind temperature along with the time is shown in figure 4. The left and right boundaries of the model are set at a constant temperature of 70 ℃, the bottom boundary is thermal insulation, the rest boundaries are heat fluxes, the simulation time is 1450min, and the model parameters are shown in table 1 below.
TABLE 1
As can be seen from fig. 5 to 7, fig. 5(a) and 5(b) show two different section wall rock temperature fitting curves of the tunnel of fig. 1. When the radial distance is more than about 30cm, the temperature of the surrounding rock tends to be stable. The temperature in the tunnel is rapidly reduced when the ventilation is started, and gradually approaches the inlet air temperature along with the ventilation time exceeding 30min, and the example result shows that the numerical calculation result and the test result have the same change rule, and the numerical result and the test result are well matched. Therefore, the simulation method provided by the invention can effectively simulate the ventilation effect of the ultra-long tunnel in the extreme temperature area.
Example two
In addition, the invention also provides a simulation device for the ventilation effect of the deep-buried ultra-long tunnel, which comprises:
the geological model building module is used for obtaining background data of the research area and building a three-dimensional geological model of the research area according to the background data of the research area;
the initial condition analysis module is used for determining the initial conditions of seepage and temperature of the three-dimensional geological model according to the water level and geothermal field distribution of the research area;
the boundary condition analysis module is used for determining seepage and temperature boundary conditions of the three-dimensional geological model according to the flow characteristics of geothermal fluid in the research area and the supply and drainage conditions;
the ventilation model establishing module is used for simplifying the tunnel into a linear geometric model according to the trend of the tunnel in the research area, and adding the linear geometric model of the tunnel into a three-dimensional geological model of the research area to form a research model for simulating the ventilation effect of the tunnel;
the ventilation condition analysis module is used for setting a temperature boundary condition and an air inflow and outflow boundary condition for a tunnel vent in the research model according to the temperature distribution and the air flow condition of the tunnel vent in the research area;
the entrance temperature analysis module is used for constructing a temperature periodic function for describing the change of entrance temperature along with time for the tunnel entrance in the research model according to the temperature distribution condition of the tunnel entrance in the research area;
and the tunnel ventilation simulation module is used for predicting the temperature change of the tunnel and the surrounding rocks around the tunnel and optimizing the ventilation frequency and speed by utilizing the research model based on the initial condition, the boundary condition and the temperature periodic function.
EXAMPLE III
Furthermore, the present embodiment also provides a computer-readable storage medium, such as a flash memory, a hard disk, a multimedia card, a card-type memory (e.g., SD or DX memory, etc.), a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, an optical disk, a server, an App application store, etc., on which a computer program is stored, which when executed by a processor, can implement the simulation method of the deep-buried ultra-long tunnel ventilation effect as described above.
The specific implementation process of the steps of the simulation method for the ventilation effect of the deeply buried ultra-long tunnel may be referred to in embodiment one, and will not be repeated herein.
Example four
The embodiment provides an electronic device, which includes a memory, a processor, and a program development stored in the memory and capable of running on the processor, wherein when the program development is executed by the processor, the steps of the simulation method for the ventilation effect of the deeply buried ultra-long tunnel described above are implemented.
The method implemented when the computer program of the intelligent hardware anti-collision method running on the processor is executed may refer to the specific embodiment of the intelligent hardware anti-collision method disclosed herein, and is not described herein again.
The processor may be an integrated circuit chip having information processing capabilities. The Processor may be a general-purpose Processor including a Central Processing Unit (CPU), a Network Processor (NP), and the like.
It should be understood that the disclosed methods and apparatus may be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of development that comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A simulation method for the ventilation effect of a deeply-buried ultra-long tunnel is characterized by comprising the following steps:
acquiring background data of a research area, and establishing a three-dimensional geological model of the research area according to the background data of the research area;
determining initial conditions of seepage and temperature of the three-dimensional geological model according to the water level and geothermal field distribution of the research area;
determining seepage and temperature boundary conditions of the three-dimensional geological model according to the flow characteristics and supply and drainage conditions of geothermal fluid in a research area;
simplifying the tunnel into a linear geometric model according to the trend of the tunnel in the research area, and adding the linear geometric model of the tunnel into a three-dimensional geological model of the research area to form a research model for simulating the ventilation effect of the tunnel;
setting a temperature boundary condition and an air inflow and outflow boundary condition for a tunnel vent in the research model according to the temperature distribution and the air flow condition of the tunnel vent in the research area;
according to the temperature distribution condition of the tunnel entrance in the research area, constructing a temperature periodic function for describing the change of the entrance temperature along with time for the tunnel entrance in the research model;
and predicting the temperature change of the tunnel and surrounding rocks around the tunnel and optimizing the ventilation frequency and speed by utilizing the research model based on the initial condition, the boundary condition and the temperature periodic function.
2. The simulation method of the ventilation effect of the deeply buried ultra-long tunnel according to claim 1, wherein: the background data of the research area comprises geological background data, geothermy geological background data and hydrogeological background data.
3. The method for simulating the ventilation effect of the deeply buried ultra-long tunnel according to claim 2, wherein the establishing of the three-dimensional geological model of the research area according to the background data of the research area comprises:
determining the lithology, thickness, distribution and fault distribution of each stratum of the research area by analyzing geological background data of the research area;
determining the depth of a constant temperature zone, the geothermal gradient of a heat storage cover layer, the temperature of heat storage and the range of a geothermal abnormal area of the research area by analyzing the geothermal geological background data of the research area;
determining the correlation between geothermal fluid and atmospheric precipitation, normal-temperature underground water and geothermal fluid among different heat storages by analyzing hydrogeological background data of a research area, and analyzing the source, storage, transportation and excretion conditions of the geothermal fluid;
a parametric surface of interfaces of layers of the study area is constructed based on results determined by analyzing background data of the study area, thereby establishing a three-dimensional geological model of the study area.
4. The simulation method of the ventilation effect of the deeply buried ultra-long tunnel according to claim 1, wherein: the linear geometric model is a one-dimensional linear geometric model.
5. The method for simulating the ventilation effect of the deeply buried ultra-long tunnel according to claim 1, wherein the setting of the temperature boundary condition and the air inflow and outflow boundary condition for the tunnel ventilation opening in the research model according to the temperature distribution and the air flow condition of the tunnel ventilation opening in the research area comprises: and adopting an equivalent heat exchange coefficient to represent the heat exchange process of air in the tunnel, a secondary lining, a heat insulation layer, a primary lining and surrounding rocks of the tunnel.
6. The method for simulating the ventilation effect of the deeply buried ultra-long tunnel according to claim 1, wherein the step of constructing a temperature periodic function for describing the temperature variation of the tunnel entrance in the research model with time according to the temperature distribution of the tunnel entrance in the research area comprises the following steps:
and constructing a temperature periodic function for describing the change of the inlet temperature along with time for the tunnel inlet in the research model by combining the change of the average air temperature at the location of the research area.
7. The method for simulating the ventilation effect of a deeply buried ultra-long tunnel according to claim 6,
the change in average air temperature at the location of the study area is a change in monthly average air temperature at the location of the study area.
8. The utility model provides a bury analogue means of overlength tunnel ventilation effect deeply which characterized in that includes:
the geological model building module is used for obtaining background data of the research area and building a three-dimensional geological model of the research area according to the background data of the research area;
the initial condition analysis module is used for determining the initial conditions of seepage and temperature of the three-dimensional geological model according to the water level and geothermal field distribution of the research area;
the boundary condition analysis module is used for determining seepage and temperature boundary conditions of the three-dimensional geological model according to the flow characteristics of geothermal fluid in the research area and the supply and drainage conditions;
the ventilation model establishing module is used for simplifying the tunnel into a linear geometric model according to the trend of the tunnel in the research area, and adding the linear geometric model of the tunnel into a three-dimensional geological model of the research area to form a research model for simulating the ventilation effect of the tunnel;
the ventilation condition analysis module is used for setting a temperature boundary condition and an air inflow and outflow boundary condition for a tunnel vent in the research model according to the temperature distribution and the air flow condition of the tunnel vent in the research area;
the entrance temperature analysis module is used for constructing a temperature periodic function for describing the change of entrance temperature along with time for the tunnel entrance in the research model according to the temperature distribution condition of the tunnel entrance in the research area;
and the tunnel ventilation simulation module is used for predicting the temperature change of the tunnel and the surrounding rocks around the tunnel and optimizing the ventilation frequency and speed by utilizing the research model based on the initial condition, the boundary condition and the temperature periodic function.
9. A storage medium having a computer program stored thereon, wherein the storage medium stores the computer program, and the computer program can be executed by one or more processors to implement the simulation method of the ventilation effect of the deeply buried ultra-long tunnel according to any one of claims 1 to 7.
10. An electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the computer program is executed by the processor to realize the simulation method of the ventilation effect of the deeply buried ultra-long tunnel according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110002188.3A CN112613193B (en) | 2021-01-04 | 2021-01-04 | Method and device for simulating ventilation effect of deep-buried ultra-long tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110002188.3A CN112613193B (en) | 2021-01-04 | 2021-01-04 | Method and device for simulating ventilation effect of deep-buried ultra-long tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112613193A true CN112613193A (en) | 2021-04-06 |
| CN112613193B CN112613193B (en) | 2022-12-23 |
Family
ID=75253345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110002188.3A Active CN112613193B (en) | 2021-01-04 | 2021-01-04 | Method and device for simulating ventilation effect of deep-buried ultra-long tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112613193B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113515803A (en) * | 2021-09-14 | 2021-10-19 | 中国矿业大学(北京) | Method and system for evaluating heat transfer and storage of surrounding rocks of subway under action of periodic surface temperature and wind temperature |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108846245A (en) * | 2018-07-09 | 2018-11-20 | 清华大学 | City-scale geothermal field multi-boreholes efficient numerical analogy method and device |
-
2021
- 2021-01-04 CN CN202110002188.3A patent/CN112613193B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108846245A (en) * | 2018-07-09 | 2018-11-20 | 清华大学 | City-scale geothermal field multi-boreholes efficient numerical analogy method and device |
Non-Patent Citations (2)
| Title |
|---|
| GUILINGWANG 等: "A robust numerical method for modeling multiple wells in city-scale geothermal field based on simplified one-dimensional well model", 《RENEWABLE ENERGY》, vol. 139, 31 August 2019 (2019-08-31), pages 873 - 894, XP085655559, DOI: 10.1016/j.renene.2019.02.131 * |
| YANHUAZENG 等: "Temperature reduction for extra-long railway tunnel with high geotemperature by longitudinal ventilation", 《TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY》, vol. 99, 31 May 2020 (2020-05-31), pages 1 - 16 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113515803A (en) * | 2021-09-14 | 2021-10-19 | 中国矿业大学(北京) | Method and system for evaluating heat transfer and storage of surrounding rocks of subway under action of periodic surface temperature and wind temperature |
| CN113515803B (en) * | 2021-09-14 | 2021-12-03 | 中国矿业大学(北京) | Method and system for evaluating heat transfer and storage of surrounding rocks of subway under action of periodic surface temperature and wind temperature |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112613193B (en) | 2022-12-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Signorelli et al. | Numerical evaluation of thermal response tests | |
| CN108846245B (en) | High-efficiency numerical simulation method and device for urban scale geothermal field group well system | |
| Shi et al. | Functional efficiency assessment of the water curtain system in an underground water-sealed oil storage cavern based on time-series monitoring data | |
| Florides et al. | Modeling and assessment of the efficiency of horizontal and vertical ground heat exchangers | |
| Renz et al. | Numerical modeling of geothermal use of mine water: challenges and examples | |
| Wang et al. | Hydraulic barrier function of the underground continuous concrete wall in the pit of subway station and its optimization | |
| Gao et al. | Numerical simulation of the thermal interaction between pumping and injecting well groups | |
| Zhao et al. | Assessing impacts of groundwater on geothermal heat exchangers: A review of methodology and modeling | |
| Zhao et al. | A robust numerical method for modeling ventilation through long tunnels in high temperature regions based on 1D pipe model | |
| Yu et al. | Determining soil thermal conductivity through numerical simulation of a heating test on a heat exchanger pile | |
| Tang et al. | Groundwater engineering | |
| Dornberger et al. | Heat exchange potential of energy tunnels for different internal airflow characteristics | |
| Suzuki et al. | Development of a spiral type heat exchanger for ground source heat pump system | |
| CN112784454A (en) | Monte Carlo method-based geothermal resource amount calculation method, system, medium and terminal | |
| Cazorla-Marín et al. | A novel TRNSYS type of a coaxial borehole heat exchanger for both short and mid term simulations: B2G model | |
| CN112613193B (en) | Method and device for simulating ventilation effect of deep-buried ultra-long tunnel | |
| Scheidler et al. | Tools to simulate changes in hydraulic flow systems in complex geologic settings affected by tunnel excavation | |
| Wang et al. | Three-dimensional flood routing of a dam break based on a high-precision digital model of a dense urban area | |
| Gholizadeh et al. | Assessment of groundwater ingress to a partially pressurized water-conveyance tunnel using a conduit-flow process model: a case study in Iran | |
| Zhang et al. | Characteristics of ground thermal properties in Harbin, China | |
| Liu et al. | Numerical analysis of surrounding rock stability in super-large section tunnel based on hydro-mechanical coupling model | |
| Tolooiyan et al. | A preliminary study of the effect of groundwater flow on the thermal front created by borehole heat exchangers | |
| Yang et al. | Analytical method for estimating leakage of reservoir basins for pumped storage power stations | |
| Forson et al. | Geothermal play-fairway analysis of Washington State prospects | |
| Szűcs et al. | Innovation in assessment of the geothermal energy potential of abandoned hydrocarbon wells in the southern and southeastern foreground of the Bükk Mountains, northeast Hungary |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |