Method and system for determining water pressure behind tunnel based on carbonate crystallization-dissolution equilibrium

Abstract

The application discloses a tunnel back water pressure determination method and system based on a carbonate crystallization-dissolution balance, collects field data, and pre-processes the field data; according to the field data, a rock stratum seepage equation, a drainage pipeline hydraulics equation and a carbonate crystallization-dissolution kinetics equation are constructed; according to the rock stratum seepage equation, the drainage pipeline hydraulics equation and the carbonate crystallization-dissolution kinetics equation, a multi-field coupling model joint equation is constructed; the multi-field coupling model joint equation is solved in a balance state to obtain drainage engineering parameters, and the drainage engineering parameters are corrected; and according to the corrected drainage engineering parameters, a water pressure calculation model is constructed to determine the tunnel back water pressure. Starting from the core mechanism of the crystallization-dissolution balance, a water pressure calculation scheme based on a multi-field coupling theory of the rock stratum seepage, the pipeline hydraulics and the carbonate crystallization kinetics is constructed, the mountain ridge tunnel back water pressure is accurately determined, and the long-term stability of the tunnel back water pressure is realized.

Description

Technical Field

[0001] This invention relates to the field of civil engineering technology, and in particular to a method and system for determining the water pressure behind a tunnel based on carbonate crystallization-dissolution equilibrium. Background Technology

[0002] As a key component of transportation infrastructure, mountain tunnels, especially those traversing water-rich mountainous strata, are significantly affected by water pressure behind the lining. This water pressure is a crucial load controlling the lining structural design and ensuring the long-term safety of the tunnel. For mountain tunnels in high-pressure, water-rich strata, accurate calculation of water pressure directly determines the lining thickness, reinforcement design, and structural stability during operation. Inappropriate water pressure values ​​can easily lead to serious problems such as lining cracking, water leakage, and structural instability, threatening tunnel operational safety and wasting resources.

[0003] Existing technologies mainly calculate the water pressure behind mountain tunnel linings using methods such as the reduction factor method, numerical simulation, and model experiments. Among these, the reduction factor method is widely used, but its values ​​largely rely on experience, resulting in a high degree of subjectivity. However, none of these existing technologies address the core mechanism of crystallization-dissolution equilibrium, making it difficult to obtain accurate and reliable calculation results for the water pressure behind mountain tunnels. Summary of the Invention

[0004] Given that existing methods for determining water pressure behind mountain tunnels do not start from the core mechanism of crystallization-dissolution equilibrium, they cannot fundamentally solve the problems of complex and low accuracy in calculating water pressure behind mountain tunnels.

[0005] In view of the above problems, the present invention provides a method for determining the water pressure behind a tunnel based on carbonate crystallization-dissolution equilibrium, comprising:

[0006] Collect field data and preprocess the field data; based on the field data, construct the rock strata seepage equation, the drainage pipe hydraulic equation, and the carbonate crystallization-dissolution kinetic equation.

[0007] Based on the rock strata seepage equation, the drainage pipe hydraulic equation, and the carbonate crystallization-dissolution kinetics equation, a multi-field coupled model joint equation is constructed.

[0008] The joint equations of the multi-field coupled model are solved in equilibrium to obtain drainage engineering parameters, and the drainage engineering parameters are then corrected.

[0009] Based on the revised drainage engineering parameters, a water pressure calculation model was constructed to determine the water pressure behind the tunnel.

[0010] Optionally, field data is collected and preprocessed; based on the field data, rock strata seepage equations, drainage pipe hydraulic equations, and carbonate crystallization kinetic equations are constructed, including:

[0011] Multimodal field data is collected from the construction site, and the multimodal field data is preprocessed to remove bad data; wherein, the multimodal field data includes the initial water head height of the mountain tunnel, the seepage volume of the cavities, the spatial distribution parameters of the seepage water, the characteristic parameters of the drainage pipes, and the ion concentration in the seepage water;

[0012] Based on the initial water head height of the mountain tunnel, the seepage volume of the burrow, and the spatial distribution parameters of the seepage water, a rock stratum seepage equation is constructed.

[0013] Based on the characteristic parameters of the drainage pipeline, the hydraulic equations of the drainage pipeline are constructed.

[0014] Based on the ion concentration in the leaked water, a carbonate crystallization-dissolution kinetic equation was constructed.

[0015] Optionally, based on the rock strata seepage equation, the drainage pipe hydraulic equation, and the carbonate crystallization-dissolution kinetic equation, a multi-field coupled model joint equation is constructed, including:

[0016] Based on the carbonate crystallization-dissolution kinetic equation, determine the carbonate dynamic crystallization equation and the carbonate dynamic erosion equation;

[0017] By combining the rock strata seepage equation, the drainage pipe hydraulic equation, the carbonate dynamic crystallization equation, and the carbonate dynamic erosion equation, a multi-field coupled model joint equation is constructed.

[0018] Optionally, the joint equations of the multi-field coupled model are solved in equilibrium to obtain drainage engineering parameters, and the drainage engineering parameters are then corrected, including:

[0019] Under the condition that the net carbonate deposition rate is zero, the joint equation of the multi-field coupling model is solved iteratively multiple times to obtain the drainage engineering parameters.

[0020] Based on the presence of foreign objects inside the drainage pipes at the construction site, the deformation state of the drainage pipes, and historical drainage project construction experience, the drainage project parameters are revised.

[0021] Optionally, a water pressure calculation model is constructed based on the corrected drainage engineering parameters to determine the water pressure behind the tunnel, including:

[0022] Based on the revised drainage engineering parameters, the hydraulic equations behind the tunnel were organized, and a water pressure calculation model was constructed.

[0023] The water pressure behind the tunnel is determined based on the water pressure calculation model.

[0024] As one aspect of the present invention, the present invention also provides a system for determining the water pressure behind a tunnel based on carbonate crystallization-dissolution equilibrium, comprising:

[0025] The data acquisition and processing module is used to acquire field data and preprocess the field data;

[0026] The equation construction module is used to construct rock strata seepage equations, drainage pipe hydraulic equations, and carbonate crystallization-dissolution kinetic equations based on the field data.

[0027] The joint construction module is used to construct a joint equation for a multi-field coupled model based on the rock strata seepage equation, the drainage pipe hydraulic equation, and the carbonate crystallization-dissolution kinetic equation.

[0028] The solution module is used to solve the joint equations of the multi-field coupled model in equilibrium to obtain drainage engineering parameters;

[0029] The correction module is used to correct the drainage engineering parameters;

[0030] The water pressure determination module is used to construct a water pressure calculation model based on the corrected drainage engineering parameters, thereby determining the water pressure behind the tunnel.

[0031] Optionally, the data acquisition and processing module is used to acquire field data and preprocess the field data, including:

[0032] Multimodal field data is collected from the construction site, and the multimodal field data is preprocessed to remove bad data; wherein, the multimodal field data includes the initial water head height of the mountain tunnel, the seepage volume of the cavities, the spatial distribution parameters of the seepage water, the characteristic parameters of the drainage pipes, and the ion concentration in the seepage water;

[0033] The equation construction module is used to construct rock strata seepage equations, drainage pipe hydraulic equations, and carbonate crystallization-dissolution kinetic equations based on the field data, including:

[0034] Based on the initial water head height of the mountain tunnel, the seepage volume of the burrow, and the spatial distribution parameters of the seepage water, a rock stratum seepage equation is constructed.

[0035] Based on the characteristic parameters of the drainage pipeline, the hydraulic equations of the drainage pipeline are constructed.

[0036] Based on the ion concentration in the leaked water, a carbonate crystallization-dissolution kinetic equation was constructed.

[0037] Optionally, the joint construction module is used to construct a multi-field coupled model joint equation based on the rock strata seepage equation, the drainage pipe hydraulic equation, and the carbonate crystallization-dissolution kinetic equation, including:

[0038] Based on the carbonate crystallization-dissolution kinetic equation, determine the carbonate dynamic crystallization equation and the carbonate dynamic erosion equation;

[0039] By combining the rock strata seepage equation, the drainage pipe hydraulic equation, the carbonate dynamic crystallization equation, and the carbonate dynamic erosion equation, a multi-field coupled model joint equation is constructed.

[0040] Optionally, the solution module is used to solve the joint equations of the multi-field coupled model in equilibrium to obtain drainage engineering parameters, including:

[0041] Under the condition that the net carbonate deposition rate is zero, the joint equation of the multi-field coupling model is solved iteratively multiple times to obtain the drainage engineering parameters.

[0042] The correction module is used to correct the drainage engineering parameters, including:

[0043] Based on the presence of foreign objects inside the drainage pipes at the construction site, the deformation state of the drainage pipes, and historical drainage project construction experience, the drainage project parameters are revised.

[0044] Optionally, the water pressure determination module is used to construct a water pressure calculation model based on the corrected drainage engineering parameters, thereby determining the water pressure behind the tunnel, including:

[0045] Based on the revised drainage engineering parameters, the hydraulic equations behind the tunnel were organized, and a water pressure calculation model was constructed.

[0046] The water pressure behind the tunnel is determined based on the water pressure calculation model.

[0047] The beneficial effects of the above-mentioned technical solutions provided in the embodiments of the present invention include at least the following:

[0048] This invention provides a method and system for determining the water pressure behind a tunnel based on carbonate crystallization-dissolution equilibrium. The method involves collecting field data and preprocessing it. Based on the field data, it constructs equations for rock seepage, drainage pipe hydraulics, and carbonate crystallization-dissolution kinetics. A multi-field coupled model joint equation is then constructed based on these equations. The joint equation is solved in equilibrium to obtain drainage engineering parameters, which are then corrected. Based on the corrected drainage engineering parameters, a water pressure calculation model is constructed to determine the water pressure behind the tunnel. Starting from the core mechanism of crystallization-dissolution equilibrium, a water pressure calculation scheme based on the multi-field coupled theory of rock seepage, pipe hydraulics, and carbonate crystallization kinetics is constructed to accurately determine the water pressure behind mountain tunnels and achieve long-term stability of the water pressure behind the tunnel.

[0049] The method and system for determining the water pressure behind a tunnel based on carbonate crystallization-dissolution equilibrium of the present invention have the following advantages:

[0050] First, based on the carbonate crystallization-dissolution equilibrium theory, this invention establishes a water pressure calculation scheme under multi-field coupling conditions, which solves the static assumption defects of traditional calculation schemes, accurately calculates the water pressure behind mountain tunnels, and achieves long-term stability of water pressure behind tunnels.

[0051] Secondly, this invention provides a more accurate and realistic load basis for lining structure design, avoiding the safety hazards caused by underestimating water pressure in traditional design, and also avoiding the waste of construction costs caused by overly conservative design, thus achieving a balance between safety and economy in lining design.

[0052] Third, this invention deeply integrates the crystallization-dissolution equilibrium theory in the field of crystallization chemistry with the water pressure calculation technology in the field of tunnel engineering, filling the gap in the existing technology that does not consider the impact of crystallization blockage on water pressure, providing a new approach for water pressure calculation in mountain tunnels, and breaking through the bottleneck of traditional water pressure calculation.

[0053] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0054] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0055] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0056] Figure 1 This is a schematic flowchart of the method for determining the water pressure behind a tunnel based on carbonate crystallization-dissolution equilibrium provided in this embodiment of the invention.

[0057] Figure 2 This is a schematic diagram of the structure of the tunnel backwater pressure determination system based on carbonate crystallization-dissolution equilibrium provided in an embodiment of the present invention.

[0058] Figure 3 It is the entire process of the hydraulic path of a mountain tunnel. Detailed Implementation

[0059] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0060] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "far," "near," "front," and "rear," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0061] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0062] Please see Figure 1 As shown, an embodiment of this application provides a method for determining the water pressure behind a tunnel based on carbonate crystallization-dissolution equilibrium. This method includes:

[0063] Collect field data and preprocess the field data; based on the field data, construct the rock strata seepage equation, the drainage pipe hydraulic equation, and the carbonate crystallization-dissolution kinetic equation.

[0064] Based on the rock strata seepage equation, the drainage pipe hydraulic equation, and the carbonate crystallization-dissolution kinetic equation, a multi-field coupled model joint equation is constructed.

[0065] The joint equations of the multi-field coupled model are solved in equilibrium to obtain the drainage engineering parameters, and the drainage engineering parameters are then corrected.

[0066] Based on the revised drainage engineering parameters, a water pressure calculation model was constructed to determine the water pressure behind the tunnel.

[0067] The beneficial effects of the above embodiments are that the method for determining the water pressure behind a tunnel based on the carbonate crystallization-dissolution equilibrium starts from the core mechanism of crystallization-dissolution equilibrium, constructs a water pressure calculation scheme based on the multi-field coupling theory of rock seepage, pipeline hydraulics and carbonate crystallization dynamics, accurately determines the water pressure behind a mountain tunnel, and achieves long-term stability of the water pressure behind the tunnel.

[0068] In another embodiment, on-site data is collected and preprocessed; based on the on-site data, rock strata seepage equations, drainage pipe hydraulic equations, and carbonate crystallization kinetic equations are constructed, including:

[0069] Multimodal field data was collected from the construction site, and the data was preprocessed to remove bad data. The multimodal field data included the initial water head height of the mountain tunnel, the seepage volume of the cavities, the spatial distribution parameters of the seepage water, the characteristic parameters of the drainage pipes, and the ion concentration in the seepage water.

[0070] Based on the initial water head height of the mountain tunnel, the seepage volume of the small hole, and the spatial distribution parameters of the seepage water, a rock stratum seepage equation is constructed.

[0071] Based on the characteristic parameters of the drainage pipeline, construct the hydraulic equations for the drainage pipeline;

[0072] Based on the ion concentration in the seepage water, a carbonate crystallization-dissolution kinetic equation was constructed.

[0073] For the beneficial effects of the above embodiments, please refer to [link / reference needed]. Figure 3 A mountain tunnel consists of, in sequence, the tunnel lining structure, the back water pressure surface, and the tunnel initial support structure. Rainwater received from the mountain surface seeps into the mountain rock and soil layer, and then seeps into the tunnel outer wall through the cracks in the mountain rock and soil layer, thus forming the back water pressure of the tunnel.

[0074] During the actual excavation of the mountain tunnel, the following data were collected at the construction site: initial water head height, seepage volume of the cavities, spatial distribution parameters of the seepage water (such as seepage volume, seepage distance, and seepage area considering drainage works), characteristic parameters of the drainage pipes (such as the length and inner diameter of the drainage pipes), and ion concentration in the seepage water.

[0075] Based on the initial water head height of the mountain tunnel, the seepage volume of the cavities, and the spatial distribution parameters of the seepage water, the following equations are constructed:

[0076]

[0077]

[0078]

[0079] In the above formula, This indicates the amount of seepage considering drainage works. Indicates the permeability coefficient of the rock strata. Indicates the area of ​​seepage. Indicates the seepage distance. Indicates the initial water head height of the mountain tunnel. This indicates the water pressure at the inlet of the drainage pipe. This indicates the density of water. Represents gravitational acceleration. Indicates the amount of water seeping from the hole. This indicates the difference in water head.

[0080] Integrating the above equations, we obtain the following rock strata seepage equation:

[0081] .

[0082] Based on the characteristic parameters of the drainage pipe, the following equations are constructed:

[0083]

[0084]

[0085]

[0086]

[0087] In the above formula, This indicates the water pressure at the inlet of the drainage pipe. This indicates the density of water. Represents gravitational acceleration. This indicates the potential energy level at the inlet of the drainage pipe. This indicates the water pressure at the outlet of the drainage pipe. This indicates the potential energy height at the outlet of the drainage pipe. Indicates the water flow velocity inside the drainage pipe. Indicates hydraulic loss. Indicates losses along the route. Indicates localized loss. Indicates the friction coefficient. Indicates the length of the drainage pipe. Indicates the inner diameter of the drainage pipe. This represents the local drag coefficient.

[0088] Integrating the above equations, we obtain the following hydraulic equations for drainage pipes:

[0089] .

[0090] Based on the ion concentration in the leaked water, the following chemical equilibrium equations were constructed:

[0091]

[0092]

[0093]

[0094]

[0095] In the above formula, Indicates supersaturation. This represents the coefficient of influence of ion activity. This indicates the concentration of calcium ions in the liquid. This indicates the concentration of carbonate ions in the liquid. This indicates the concentration of bicarbonate ions in the liquid. This represents the solubility product of calcium carbonate. Represents the first-order ionization constant. Represents the second-order ionization constant. Represents Henry's constant, express partial pressure, Indicates hydrogen ion concentration. Indicates dissolution and concentration, Indicates that it is dissolved in an aqueous solvent concentration.

[0096] Integrating the above equations, we obtain the following carbonate crystallization-dissolution kinetic equation:

[0097] .

[0098] In another embodiment, based on the rock strata seepage equation, the drainage pipe hydraulic equation, and the carbonate crystallization-dissolution kinetic equation, a multi-field coupled model joint equation is constructed, including:

[0099] Based on the carbonate crystallization-dissolution kinetics equation, determine the carbonate dynamic crystallization equation and the carbonate dynamic erosion equation;

[0100] By combining the seepage equations of rock strata, the hydraulic equations of drainage pipes, the dynamic crystallization equation of carbonates, and the dynamic erosion equation of carbonates, a multi-field coupled model joint equation is constructed.

[0101] The beneficial effects of the above embodiments are demonstrated in practical operation by constructing the following carbonate kinetic crystallization equation based on the aforementioned carbonate crystallization-dissolution kinetic equation:

[0102]

[0103]

[0104] In the above formula, express Crystallization deposition rate Represents the convective mass transfer coefficient. Represents the surface reaction rate constant. Indicates the driving force of crystallization concentration;

[0105] And the following carbonate dynamic erosion equation is constructed:

[0106]

[0107] In the above formula, express Crystal erosion rate Indicates the density of the scale layer. Indicates the water flow velocity inside the drainage pipe. This represents the coefficient of linear expansion of the scale material. This indicates the thermodynamic temperature of the pipe wall in the drainage pipe. Indicates the thermodynamic temperature of the main fluid. Indicates the grain size of the scale layer. This indicates the density of water. Represents the fluid dynamic viscosity coefficient. It represents the acceleration due to gravity.

[0108] By combining the rock strata seepage equation, the drainage pipe hydraulic equation, the carbonate dynamic crystallization equation, and the carbonate dynamic erosion equation, the following multi-field coupled model joint equation is constructed:

[0109]

[0110]

[0111]

[0112]

[0113] .

[0114] In another embodiment, the joint equations of the multi-field coupled model are solved in equilibrium to obtain drainage engineering parameters, and the drainage engineering parameters are then corrected, including:

[0115] Under the condition that the net carbonate deposition rate is zero, the joint equation of the multi-field coupled model is solved iteratively multiple times to obtain the drainage engineering parameters.

[0116] Based on the presence of foreign objects inside the drainage pipes at the construction site, the deformation of the drainage pipes, and historical experience in drainage engineering construction, the drainage engineering parameters are adjusted.

[0117] The beneficial effects of the above embodiments, in actual operation, are achieved by iteratively solving the joint equations of the multi-field coupled model under the premise of a zero net carbonate deposition rate, to obtain drainage engineering parameters. These drainage engineering parameters can be, but are not limited to, parameters such as the length and inner diameter of the drainage pipe. Considering that during actual construction, foreign objects such as sand and gravel debris may exist within the drainage pipe, and that the drainage pipe may be locally compressed and deformed, causing it to be unable to maintain its normal drainage function, the design parameters of the self-cleaning drainage project are modified based on the presence and deformation of foreign objects and historical drainage project construction experience (such as the operational experience parameters of drainage pipe burial in historical drainage projects).

[0118] In another embodiment, a water pressure calculation model is constructed based on the modified drainage engineering parameters to determine the water pressure behind the tunnel, including:

[0119] Based on the revised drainage engineering parameters, the hydraulic equations behind the tunnel were organized, and a water pressure calculation model was constructed.

[0120] The water pressure behind the tunnel is determined based on the water pressure calculation model.

[0121] The beneficial effects of the above embodiments are as follows: based on the modified drainage engineering parameters, the hydraulic equation behind the tunnel formed based on Bernoulli's equation is enveloped and rearranged to obtain a water pressure calculation model; then, the water pressure calculation model is solved to determine the value of the water pressure behind the tunnel. The envelope rearrangement and the solution of the water pressure calculation model are conventional techniques in this field and will not be described in detail here.

[0122] Please see Figure 2 As shown, an embodiment of this application provides a system for determining the water pressure behind a tunnel based on carbonate crystallization-dissolution equilibrium. This system includes:

[0123] The data acquisition and processing module is used to collect field data and preprocess the field data.

[0124] The equation construction module is used to construct rock strata seepage equations, drainage pipe hydraulic equations, and carbonate crystallization-dissolution kinetic equations based on field data.

[0125] The joint construction module is used to construct joint equations for multi-field coupled models based on rock strata seepage equations, drainage pipe hydraulic equations, and carbonate crystallization-dissolution kinetic equations.

[0126] The solver module is used to solve the joint equations of the multi-field coupled model in equilibrium to obtain the drainage engineering parameters;

[0127] The correction module is used to correct drainage engineering parameters;

[0128] The water pressure determination module is used to construct a water pressure calculation model based on the corrected drainage engineering parameters, thereby determining the water pressure behind the tunnel.

[0129] The beneficial effects of the above embodiments are that the tunnel backwater pressure determination system based on carbonate crystallization-dissolution equilibrium starts from the core mechanism of crystallization-dissolution equilibrium, constructs a water pressure calculation scheme based on the multi-field coupling theory of rock seepage, pipeline hydraulics and carbonate crystallization dynamics, accurately determines the backwater pressure of mountain tunnels, and achieves long-term stability of backwater pressure.

[0130] In another embodiment, the data acquisition and processing module is used to acquire field data and preprocess the field data, including:

[0131] Multimodal field data was collected from the construction site, and the data was preprocessed to remove bad data. The multimodal field data included the initial water head height of the mountain tunnel, the seepage volume of the cavities, the spatial distribution parameters of the seepage water, the characteristic parameters of the drainage pipes, and the ion concentration in the seepage water.

[0132] The equation construction module is used to construct rock strata seepage equations, drainage pipe hydraulic equations, and carbonate crystallization-dissolution kinetic equations based on field data, including:

[0133] Based on the initial water head height of the mountain tunnel, the seepage volume of the small hole, and the spatial distribution parameters of the seepage water, a rock stratum seepage equation is constructed.

[0134] Based on the characteristic parameters of the drainage pipeline, construct the hydraulic equations for the drainage pipeline;

[0135] Based on the ion concentration in the seepage water, a carbonate crystallization-dissolution kinetic equation was constructed.

[0136] In another embodiment, the joint construction module is used to construct a joint equation for a multi-field coupled model based on the rock strata seepage equation, the drainage pipe hydraulic equation, and the carbonate crystallization-dissolution kinetic equation, including:

[0137] Based on the carbonate crystallization-dissolution kinetics equation, determine the carbonate dynamic crystallization equation and the carbonate dynamic erosion equation;

[0138] By combining the seepage equations of rock strata, the hydraulic equations of drainage pipes, the dynamic crystallization equation of carbonates, and the dynamic erosion equation of carbonates, a multi-field coupled model joint equation is constructed.

[0139] In another embodiment, the solver module is used to perform equilibrium solution of the joint equations of the multi-field coupled model to obtain drainage engineering parameters, including:

[0140] Under the condition that the net carbonate deposition rate is zero, the joint equation of the multi-field coupled model is solved iteratively multiple times to obtain the drainage engineering parameters.

[0141] The correction module is used to correct drainage engineering parameters, including:

[0142] Based on the presence of foreign objects inside the drainage pipes at the construction site, the deformation of the drainage pipes, and historical experience in drainage engineering construction, the drainage engineering parameters are adjusted.

[0143] In another embodiment, the water pressure determination module is used to construct a water pressure calculation model based on the corrected drainage engineering parameters, thereby determining the water pressure behind the tunnel, including:

[0144] Based on the revised drainage engineering parameters, the hydraulic equations behind the tunnel were organized, and a water pressure calculation model was constructed.

[0145] The water pressure behind the tunnel is determined based on the water pressure calculation model.

[0146] The tunnel backwater pressure determination system based on carbonate crystallization-dissolution equilibrium of the present invention has the same operation and effect as the above-mentioned tunnel backwater pressure determination method based on carbonate crystallization-dissolution equilibrium. Therefore, the tunnel backwater pressure determination system based on carbonate crystallization-dissolution equilibrium will not be described again here.

[0147] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. This disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims. Thus, if these modifications and variations of the invention fall within the scope of the claims of the invention and their equivalents, the invention is also intended to include these modifications and variations.

Claims

1. A method for determining the water pressure behind a tunnel based on carbonate crystallization-dissolution equilibrium, characterized in that, include: Collect on-site data and preprocess the on-site data; Based on the field data, rock strata seepage equations, drainage pipe hydraulic equations, and carbonate crystallization-dissolution kinetic equations were constructed. Based on the rock strata seepage equation, the drainage pipe hydraulic equation, and the carbonate crystallization-dissolution kinetics equation, a multi-field coupled model joint equation is constructed. The joint equations of the multi-field coupling model are solved in equilibrium to obtain drainage engineering parameters, and the drainage engineering parameters are then corrected. Based on the revised drainage engineering parameters, a water pressure calculation model was constructed to determine the water pressure behind the tunnel.

2. The method for determining the water pressure behind a tunnel based on carbonate crystallization-dissolution equilibrium as described in claim 1, characterized in that: Collect on-site data and preprocess the on-site data; Based on the aforementioned field data, the rock strata seepage equation, drainage pipe hydraulic equation, and carbonate crystallization kinetic equation were constructed, including: Multimodal field data is collected from the construction site, and the multimodal field data is preprocessed to remove bad data; wherein, the multimodal field data includes the initial water head height of the mountain tunnel, the seepage volume of the cavities, the spatial distribution parameters of the seepage water, the characteristic parameters of the drainage pipes, and the ion concentration in the seepage water; Based on the initial water head height of the mountain tunnel, the seepage volume of the burrow, and the spatial distribution parameters of the seepage water, a rock stratum seepage equation is constructed. Based on the characteristic parameters of the drainage pipeline, the hydraulic equations of the drainage pipeline are constructed. Based on the ion concentration in the leaked water, a carbonate crystallization-dissolution kinetic equation was constructed.

3. The method for determining the water pressure behind a tunnel based on carbonate crystallization-dissolution equilibrium as described in claim 1, characterized in that: Based on the rock strata seepage equation, the drainage pipe hydraulic equation, and the carbonate crystallization-dissolution kinetic equation, a multi-field coupled model joint equation is constructed, including: Based on the carbonate crystallization-dissolution kinetic equation, determine the carbonate dynamic crystallization equation and the carbonate dynamic erosion equation; By combining the rock strata seepage equation, the drainage pipe hydraulic equation, the carbonate dynamic crystallization equation, and the carbonate dynamic erosion equation, a multi-field coupled model joint equation is constructed.

4. The method for determining the water pressure behind a tunnel based on carbonate crystallization-dissolution equilibrium as described in claim 1, characterized in that: The joint equations of the multi-field coupled model are solved in equilibrium to obtain drainage engineering parameters, and these parameters are then corrected, including: Under the condition that the net carbonate deposition rate is zero, the joint equation of the multi-field coupling model is solved iteratively multiple times to obtain the drainage engineering parameters. Based on the presence of foreign objects inside the drainage pipes at the construction site, the deformation state of the drainage pipes, and historical drainage project construction experience, the drainage project parameters are revised.

5. The method for determining the water pressure behind a tunnel based on carbonate crystallization-dissolution equilibrium as described in claim 1, characterized in that: Based on the revised drainage engineering parameters, a water pressure calculation model is constructed to determine the water pressure behind the tunnel, including: Based on the revised drainage engineering parameters, the hydraulic equations behind the tunnel were organized, and a water pressure calculation model was constructed. The water pressure behind the tunnel is determined based on the water pressure calculation model.

6. A system for determining water pressure behind a tunnel based on carbonate crystallization-dissolution equilibrium, characterized in that, include: The data acquisition and processing module is used to acquire field data and preprocess the field data; The equation construction module is used to construct rock strata seepage equations, drainage pipe hydraulic equations, and carbonate crystallization-dissolution kinetic equations based on the field data. The joint construction module is used to construct a joint equation for a multi-field coupled model based on the rock strata seepage equation, the drainage pipe hydraulic equation, and the carbonate crystallization-dissolution kinetic equation. The solution module is used to solve the joint equations of the multi-field coupled model in equilibrium to obtain drainage engineering parameters; The correction module is used to correct the drainage engineering parameters; The water pressure determination module is used to construct a water pressure calculation model based on the corrected drainage engineering parameters, thereby determining the water pressure behind the tunnel.

7. The tunnel backwater pressure determination system based on carbonate crystallization-dissolution equilibrium as described in claim 6, characterized in that: The data acquisition and processing module is used to acquire field data and preprocess the field data, including: Multimodal field data is collected from the construction site, and the multimodal field data is preprocessed to remove bad data; wherein, the multimodal field data includes the initial water head height of the mountain tunnel, the seepage volume of the cavities, the spatial distribution parameters of the seepage water, the characteristic parameters of the drainage pipes, and the ion concentration in the seepage water; The equation construction module is used to construct rock strata seepage equations, drainage pipe hydraulic equations, and carbonate crystallization-dissolution kinetic equations based on the field data, including: Based on the initial water head height of the mountain tunnel, the seepage volume of the burrow, and the spatial distribution parameters of the seepage water, a rock stratum seepage equation is constructed. Based on the characteristic parameters of the drainage pipeline, the hydraulic equations of the drainage pipeline are constructed. Based on the ion concentration in the leaked water, a carbonate crystallization-dissolution kinetic equation was constructed.

8. The tunnel backwater pressure determination system based on carbonate crystallization-dissolution equilibrium as described in claim 6, characterized in that: The joint construction module is used to construct a multi-field coupled model joint equation based on the rock strata seepage equation, the drainage pipe hydraulic equation, and the carbonate crystallization-dissolution kinetic equation, including: Based on the carbonate crystallization-dissolution kinetic equation, determine the carbonate dynamic crystallization equation and the carbonate dynamic erosion equation; By combining the rock strata seepage equation, the drainage pipe hydraulic equation, the carbonate dynamic crystallization equation, and the carbonate dynamic erosion equation, a multi-field coupled model joint equation is constructed.

9. The tunnel backwater pressure determination system based on carbonate crystallization-dissolution equilibrium as described in claim 6, characterized in that: The solution module is used to solve the joint equations of the multi-field coupled model in equilibrium to obtain drainage engineering parameters, including: Under the condition that the net carbonate deposition rate is zero, the joint equation of the multi-field coupling model is solved iteratively multiple times to obtain the drainage engineering parameters. The correction module is used to correct the drainage engineering parameters, including: Based on the presence of foreign objects inside the drainage pipes at the construction site, the deformation state of the drainage pipes, and historical drainage project construction experience, the drainage project parameters are revised.

10. The tunnel backwater pressure determination system based on carbonate crystallization-dissolution equilibrium as described in claim 6, characterized in that: The water pressure determination module is used to construct a water pressure calculation model based on the corrected drainage engineering parameters, thereby determining the water pressure behind the tunnel, including: Based on the revised drainage engineering parameters, the hydraulic equations behind the tunnel were organized, and a water pressure calculation model was constructed. The water pressure behind the tunnel is determined based on the water pressure calculation model.

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