Method and device for predicting water inflow during tunnel construction period

Abstract

The invention provides a method and device for predicting the water inflow during the tunnel construction period, and relates to the technical field of tunnel construction drainage safeguard.The method comprises the steps that tunnel construction data are obtained; tunnel design parameters are obtained from the tunnel construction data, area equivalent processing is conducted on the section of a tunnel, circles with the same area are obtained in an equivalent mode, and equivalent tunnel radius parameters are determined based on the equivalent circles; according to geological parameters and tunnel design parameters in a tunnel construction project, determining a water head height, a surrounding rock permeability coefficient and a primary support permeability coefficient; according to the tunnel radius parameter, the water head height, the surrounding rock permeability coefficient and the primary support permeability coefficient, the predicted water inflow of the tunnel face and the tunnel body section in the tunnel construction period is determined.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction drainage guarantee, and in particular to a method and device for predicting water inflow during tunnel construction. Background Art

[0002] This section is intended to provide a background or context for embodiments of the present invention. No description herein is admitted to be prior art by virtue of its inclusion in this section.

[0003] Tunnel water inflow can have a serious impact on tunnel construction and operation. Therefore, accurate prediction of tunnel water inflow can help formulate preventive measures in advance and reduce construction risks. At the same time, tunnel water inflow prediction is an important basis for tunnel design, safe construction and operation management. In the tunnel design stage, water inflow prediction can help engineers more accurately determine the structure, size and drainage facilities of the tunnel to ensure the stability and safety of the tunnel. In the construction stage, water inflow prediction can help the construction team formulate a reasonable construction plan, optimize the construction sequence, and avoid water inflow problems during construction. In the operation stage, water inflow prediction helps operation managers formulate effective maintenance and management measures to ensure the long-term stable operation of the tunnel.

[0004] The commonly used water inflow prediction methods (rainfall infiltration method, runoff modulus method) reflect the relationship between the water content characteristics of the stratum and the water inflow of the tunnel, and can macroscopically evaluate the tunnel water inflow of the region. However, its limitation is that it cannot evaluate the water blocking effect of the support measures (spraying, grouting, etc.) for the water-rich areas during the tunnel construction process.

[0005] In summary, there is an urgent need for a technical solution that can overcome the above-mentioned defects, effectively predict the amount of water inflow, and provide effective data support for tunnels. Summary of the invention

[0006] In order to solve the problems existing in the prior art, the present invention proposes a method and device for predicting water inflow during tunnel construction. By establishing multiple concentric cylinder models and short cylinder models, combined with the water blocking effect of the support for water-rich areas during tunnel construction, the water inflow of the tunnel face and the tunnel body during tunnel construction is predicted and calculated, so as to avoid the catastrophic consequences for personnel and machinery in the construction process caused by insufficient prediction of water inflow during tunnel construction and mismatched drainage capacity. The overall solution can accurately predict the water inflow during tunnel construction and provide data support for evaluating the water blocking effect of support measures.

[0007] In a first aspect of an embodiment of the present invention, a method for predicting water inflow during tunnel construction is proposed, comprising:

[0008] Obtain tunnel construction data;

[0009] Acquire tunnel design parameters from the tunnel construction data, perform area equivalence processing on the tunnel cross section to obtain a circle with the same area, and determine the radius parameter of the equivalent tunnel based on the equivalent circle;

[0010] Determine the water head height, surrounding rock permeability coefficient and initial support permeability coefficient based on the geological parameters and tunnel design parameters in the tunnel construction project;

[0011] The predicted water inflow at the tunnel face and the tunnel body during the tunnel construction period is determined based on the tunnel radius parameters, water head height, surrounding rock permeability coefficient and initial support permeability coefficient.

[0012] In a second aspect of an embodiment of the present invention, a method for predicting water inflow during tunnel construction is proposed, comprising:

[0013] Data acquisition module, used to acquire tunnel construction data;

[0014] A tunnel section equivalent processing module is used to obtain tunnel design parameters from the tunnel construction data, perform area equivalent processing on the tunnel section, obtain a circle with the same area, and determine the radius parameter of the equivalent tunnel based on the equivalent circle;

[0015] The parameter determination module is used to determine the water head height, surrounding rock permeability coefficient and initial support permeability coefficient according to the geological parameters and tunnel design parameters in the tunnel construction project;

[0016] The water inflow prediction module is used to determine the predicted water inflow of the tunnel face and the tunnel body during the tunnel construction period according to the tunnel radius parameters, head height, surrounding rock permeability coefficient and initial support permeability coefficient.

[0017] In a third aspect of an embodiment of the present invention, a computer device is proposed, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements a method for predicting water inflow during tunnel construction when executing the computer program.

[0018] In a fourth aspect of an embodiment of the present invention, a computer-readable storage medium is proposed, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, a method for predicting water inflow during tunnel construction is implemented.

[0019] In a fifth aspect of an embodiment of the present invention, a computer program product is proposed. The computer program product includes a computer program. When the computer program is executed by a processor, a method for predicting water inflow during tunnel construction is implemented.

[0020] The method and device for predicting water inflow during tunnel construction period proposed by the present invention obtain tunnel construction data, obtain tunnel design parameters from the tunnel construction data, perform area equivalence processing on the tunnel cross section, equivalently obtain a circle with the same area, and determine the equivalent tunnel radius parameter based on the equivalent circle; determine the water head height, surrounding rock permeability coefficient and initial support permeability coefficient according to the geological parameters and tunnel design parameters in the tunnel construction project; determine the predicted water inflow of the tunnel face and the tunnel body during the tunnel construction period according to the tunnel radius parameters, water head height, surrounding rock permeability coefficient and initial support permeability coefficient. The overall scheme can accurately predict the water inflow of the tunnel face and the tunnel body during the tunnel construction period, provide data support for evaluating the water blocking effect of the tunnel body support measures, and has strong promotion and economic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic flow chart of a method for predicting water inflow during tunnel construction period according to an embodiment of the present invention.

[0023] Figure 2 Schematic diagram of a multiple concentric circle isomorphic model according to an embodiment of the present invention.

[0024] Figure 3 Schematic diagram of a short cylinder model according to an embodiment of the present invention.

[0025] Figure 4 It is a schematic diagram of a flow chart of calculating water inflow according to a specific embodiment of the present invention.

[0026] Figure 5 It is a schematic diagram of the architecture of a device for predicting water inflow during tunnel construction period according to an embodiment of the present invention.

[0027] Figure 6 It is a schematic diagram of the structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The principles and spirit of the present invention will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are provided only to enable those skilled in the art to better understand and implement the present invention, and are not intended to limit the scope of the present invention in any way. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0029] Those skilled in the art will appreciate that the embodiments of the present invention may be implemented as a system, device, apparatus, method or computer program product. Therefore, the present disclosure may be specifically implemented in the following forms, namely: complete hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

[0030] According to an embodiment of the present invention, a method and device for predicting water inflow during tunnel construction is proposed, which relates to the technical field of tunnel construction drainage guarantee. The present invention is based on groundwater dynamics. The groundwater dynamics method mainly comprehensively considers the influence of the conductivity coefficient (permeability coefficient) of hydraulic conductive media such as regional water level height, surrounding rock and support structure, and calculates the water inflow during tunnel excavation construction based on Darcy's law.

[0031] During tunnel excavation, water gushing occurs mainly at the tunnel face and tunnel body. The tunnel body is usually supported, such as spraying or grouting to block water. Therefore, the water gushing at the tunnel face and tunnel body is calculated separately based on the principle of hydrodynamics.

[0032] The present invention proposes a method for predicting water inflow during tunnel construction, which can accurately predict the water inflow at the tunnel face and the tunnel body during the tunnel construction period, and can also evaluate the water blocking effect of supporting measures for the tunnel body section, and has strong promotion and economic value.

[0033] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0034] Figure 1 FIG. 1 is a flow chart of a method for predicting water inflow during tunnel construction according to an embodiment of the present invention. Figure 1 As shown, the method includes:

[0035] S101, obtaining tunnel construction data;

[0036] S102, obtaining tunnel design parameters from the tunnel construction data, performing area equivalence processing on the tunnel cross section to obtain a circle with the same area, and determining the radius parameter of the equivalent tunnel based on the equivalent circle;

[0037] S103, determining the water head height, surrounding rock permeability coefficient and initial support permeability coefficient according to geological parameters in the tunnel construction project and tunnel design parameters;

[0038] S104, determining the predicted water inflow of the tunnel face and the tunnel body during the tunnel construction period according to the tunnel radius parameter, water head height, surrounding rock permeability coefficient and initial support permeability coefficient.

[0039] The invention establishes a multiple concentric cylinder model and a short cylinder model based on the groundwater dynamics theory, and calculates the water inflow during the tunnel excavation construction process based on Darcy's law.

[0040] By establishing multiple concentric cylinder models and short cylinder models, combined with the water-blocking effect of the support treatment in water-rich areas during tunnel construction, the water inflow at the tunnel face and tunnel body during tunnel construction is predicted and calculated to avoid catastrophic consequences for personnel and machinery in the construction process due to insufficient prediction of water inflow during tunnel construction and mismatched drainage capacity.

[0041] The overall scheme can accurately predict the amount of water gushing from the tunnel face and tunnel body during tunnel construction, and provide data support for evaluating the water blocking effect of support measures in the tunnel body section. It has strong promotion and economic value.

[0042] In order to explain the above-mentioned method for predicting water inflow during tunnel construction more clearly, each step will be described in detail below.

[0043] In one embodiment, for S102, the cross-sectional area of ​​the tunnel is calculated in combination with the tunnel parameters of the actual project, and this area is used as the area of ​​an equivalent circle, and the formula S=πr is solved using the area of ​​the circle. 2 , we can get the radius r of the equivalent circle at this time.

[0044] In one embodiment, for S103, the water head height, surrounding rock permeability coefficient and initial support permeability coefficient are determined according to geological parameters and tunnel design parameters in the tunnel construction project, including:

[0045] For tunnel construction projects, geological exploration work is carried out before the start of tunnel construction, and geological parameters and tunnel design parameters are determined through geological exploration data and tunnel construction information;

[0046] According to the geological parameters and tunnel design parameters, the water head height, surrounding rock permeability coefficient and initial support permeability coefficient are determined.

[0047] In actual application scenarios, when the water head height at the top of the tunnel is more than 8 times the diameter of the tunnel, the influence of the gravity of the water around the tunnel is ignored, and the water pressure around the tunnel is constant.

[0048] In one embodiment, S104, the predicted water inflow of the tunnel face and the tunnel body during the tunnel construction period is determined according to the tunnel radius parameter, the water head height, the surrounding rock permeability coefficient and the initial support permeability coefficient.

[0049] For the predicted water inflow of the tunnel body, the tunnel body is equivalent to multiple concentric cylinders; refer to Figure 2 , is a schematic diagram of a multiple concentric circle isomorphic model according to an embodiment of the present invention, such as Figure 2 As shown in the figure, the water inflow of the tunnel body section is determined according to the water head height, surrounding rock permeability coefficient, calculated length of the tunnel body, outer radius and inner radius of the initial support lining and the initial support permeability coefficient; r gis the outer radius of the grouting circle, r1 and r2 are the outer radius and inner radius of the initial support lining; among them, the length of the cylinder is consistent with the length of the tunnel section.

[0050] The calculation method for the predicted water inflow in the tunnel body is:

[0051]

[0052] In the formula, Q s1 is the predicted water inflow of the tunnel body; H is the water head height at the center of the circle; k m is the surrounding rock permeability coefficient; L is the calculated length of the tunnel; r1 is the outer radius of the initial support lining; r2 is the inner radius; k1 is the initial support permeability coefficient;

[0053] Among them, when grouting reinforcement is not used, the grouting circle parameters are assigned to the outer radius of the initial support lining and the initial support permeability coefficient.

[0054] For the predicted water inflow at the tunnel face during the construction period, the tunnel face is equivalent to a cylinder of a set length and the surrounding rock permeability coefficient is determined; Figure 3 , is a schematic diagram of a short cylinder model according to an embodiment of the present invention, such as Figure 3 As shown, the tunnel face is equivalent to a short cylinder of 1 m.

[0055] The calculation method for the predicted water inflow at the tunnel face during the construction period is:

[0056]

[0057] In the formula, Q s2 is the predicted water inflow at the tunnel face during the construction period; H is the water head height at the center of the circle; k m is the surrounding rock permeability coefficient; r1 is the outer radius of the initial support lining.

[0058] The double cylinder method takes into account the "water retaining" of the initial support, and its calculation of water inflow is close to the calculation result of the rainfall infiltration method, and is not much different from the results of field verification. It can be found from the calculation formula of the multiple concentric cylinder model that the larger the initial support permeability coefficient k1, the higher the k m The smaller the value of / k1, the smaller the denominator of the formula, and the calculated Q s1 The larger the value, the better the support and water blocking effect. The smaller the predicted water consumption calculated by the formula is, which is in line with the actual situation. Therefore, it is believed that the calculation model and calculation formula establish a mathematical calculation relationship between the support and water blocking effect and the water inflow. This formula can be used to evaluate the support and water blocking effect and predict the tunnel water inflow.

[0059] The present invention takes into account both the water inflow in the tunnel body and the water inflow in the face during tunnel construction, and analyzes the water blocking effect of the support measures for water-rich areas during tunnel construction through a multiple concentric cylinder model. The present invention can accurately predict the water inflow during tunnel construction and evaluate the water blocking effect of the support measures.

[0060] The overall plan can be referred to Figure 4 As shown, the method is:

[0061] S401, conduct experimental investigation based on actual engineering to determine the formation permeability coefficient.

[0062] S402, conduct tunnel design and determine the initial branch permeability coefficient;

[0063] S403, the designed tunnel is area equivalent, the inner radius and outer radius of the primary branch are determined, and the penetration height is determined.

[0064] Specifically, the area of ​​the tunnel section is equivalent to a circle with the same area, combined with the tunnel design parameters in the actual project. Combined with the geological parameters in the actual project and the tunnel design parameters, all calculation parameters such as the required head height, surrounding rock permeability coefficient, and initial support permeability coefficient in the formula are determined.

[0065] S404: Substitute the calculation parameters into the formula for calculation as needed.

[0066] Specifically, by substituting the calculation parameters into the corresponding formula, the predicted water inflow from the tunnel face and tunnel body during the tunnel construction period can be calculated.

[0067] S405, calculating the water inflow in the tunnel body;

[0068]

[0069] For each parameter in the formula, the acquisition method is:

[0070] The water head height H at the center of the circle is the distance from the groundwater level to the center of the circle after the tunnel cross section is equivalent to a circle of the same area.

[0071] k m is the permeability coefficient of surrounding rock, which is obtained through investigation based on actual projects.

[0072] L is the calculated length of the tunnel body. The length of the tunnel body section that needs to be calculated can be obtained based on the design data.

[0073] r1 is the outer radius of the initial support lining. The radius of the equivalent circle is obtained by equivalentizing the area within the outer contour of the initial support.

[0074] r2 is the inner radius, which is the radius of the equivalent circle obtained by performing area equivalent on the area within the inner contour of the initial support.

[0075] k1 is the initial support permeability coefficient, which can be obtained based on the tunnel design data.

[0076] S406, calculate the water inflow at the face.

[0077]

[0078] For each parameter in the formula, the acquisition method is:

[0079] H is the water head height at the center of the circle, which is the distance from the groundwater level to the center of the circle after the tunnel cross section is equivalent to a circle of the same area.

[0080] k m is the permeability coefficient of surrounding rock, which is obtained through investigation based on actual projects.

[0081] r1 is the outer radius of the initial support lining. The radius of the equivalent circle is obtained by equivalentizing the area within the outer contour of the initial support.

[0082] The method for predicting water inflow during tunnel construction proposed by the present invention can accurately predict the water inflow at the tunnel face and the tunnel body during the tunnel construction period, and can also evaluate the water blocking effect of the supporting measures for the tunnel body section, which has strong promotion and economic value.

[0083] It should be noted that, although the operations of the method of the present invention are described in a specific order in the above embodiments and the accompanying drawings, this does not require or imply that the operations must be performed in the specific order, or that all the operations shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps.

[0084] After introducing the method of the exemplary embodiment of the present invention, next, refer to Figure 5 A device for predicting water inflow during tunnel construction according to an exemplary embodiment of the present invention is introduced.

[0085] The implementation of the device for predicting water inflow during tunnel construction period can refer to the implementation of the above method, and the repeated parts will not be repeated. The term "module" or "unit" used below can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware is also possible and conceived.

[0086] Based on the same inventive concept, the present invention also proposes a device for predicting water inflow during tunnel construction. Figure 5 As shown, the device comprises:

[0087] A data acquisition module 510 is used to acquire tunnel construction data;

[0088] The tunnel cross-section equivalent processing module 520 is used to obtain tunnel design parameters from the tunnel construction data, perform area equivalent processing on the tunnel cross-section to obtain a circle with the same area, and determine the radius parameter of the equivalent tunnel based on the equivalent circle;

[0089] The parameter determination module 530 is used to determine the water head height, the surrounding rock permeability coefficient and the initial support permeability coefficient according to the geological parameters and tunnel design parameters in the tunnel construction project;

[0090] The water inflow prediction module 540 is used to determine the predicted water inflow of the tunnel face and the tunnel body during the tunnel construction period according to the tunnel radius parameters, water head height, surrounding rock permeability coefficient and initial support permeability coefficient.

[0091] In one embodiment, the parameter determination module 530 is specifically used to:

[0092] For tunnel construction projects, geological exploration work is carried out before the start of tunnel construction, and geological parameters and tunnel design parameters are determined through geological exploration data and tunnel construction information;

[0093] According to the geological parameters and tunnel design parameters, the water head height, surrounding rock permeability coefficient and initial support permeability coefficient are determined.

[0094] When the water head height at the top of the tunnel is more than 8 times the diameter of the tunnel, ignoring the influence of the gravity of the water around the tunnel, the water pressure around the tunnel is constant.

[0095] In one embodiment, the water inflow prediction module 540 is specifically used to:

[0096] For the predicted water inflow of the tunnel body section, the tunnel body section is equivalent to multiple concentric cylinders, and the water inflow of the tunnel body section is determined based on the head height, surrounding rock permeability coefficient, calculated tunnel body length, initial support lining outer radius, inner radius and initial support permeability coefficient; among which, the length of the cylinder is consistent with the length of the tunnel body section.

[0097] The calculation method for the predicted water inflow in the tunnel body is:

[0098]

[0099] In the formula, Q s1 is the predicted water inflow of the tunnel body; H is the water head height at the center of the circle; k m is the permeability coefficient of surrounding rock; L is the calculated length of the tunnel; r1 is the outer radius of the initial support lining; r2 is the inner radius; k1 is the permeability coefficient of the initial support; among them, when grouting reinforcement is not adopted, the grouting circle parameters are assigned to the outer radius of the initial support lining and the permeability coefficient of the initial support.

[0100] In one embodiment, the water inflow prediction module 540 is specifically used to:

[0101] For the predicted water inflow at the tunnel face during the tunnel construction period, the tunnel face is equivalent to a cylinder of a set length and the surrounding rock permeability coefficient is determined;

[0102] The calculation method for the predicted water inflow at the tunnel face during the construction period is:

[0103]

[0104] In the formula, Q s2 is the predicted water inflow at the tunnel face during the construction period; H is the water head height at the center of the circle; k m is the surrounding rock permeability coefficient; r1 is the outer radius of the initial support lining.

[0105] It should be noted that, although several modules of the device for predicting water inflow during tunnel construction are mentioned in the above detailed description, such division is merely exemplary and not mandatory. In fact, according to an embodiment of the present invention, the features and functions of two or more modules described above may be embodied in one module. Conversely, the features and functions of one module described above may be further divided into multiple modules for embodiment.

[0106] Based on the above invention concept, Figure 6 As shown, the present invention also proposes a computer device 600, including a memory 610, a processor 620, and a computer program 630 stored in the memory 610 and executable on the processor 620, wherein the processor 620 implements the aforementioned method for predicting water inflow during tunnel construction when executing the computer program 630.

[0107] Based on the aforementioned inventive concept, the present invention proposes a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the aforementioned method for predicting water inflow during tunnel construction is implemented.

[0108] Based on the aforementioned inventive concept, the present invention proposes a computer program product, which includes a computer program. When the computer program is executed by a processor, a method for predicting water inflow during tunnel construction is implemented.

[0109] The present invention comprehensively considers the water inflow of the tunnel body and the face, and provides a more comprehensive prediction of water inflow. A multiple concentric cylinder model is established, which takes into account the water blocking effect of support measures (such as spray mixing, grouting, etc.) for water-rich areas during tunnel construction, which helps to more accurately predict the water inflow. For the prediction of the water inflow of the face, the method adopts a short cylinder model to predict the seepage volume by determining the permeability coefficient of the surrounding rock. This method simplifies the calculation process and provides a more accurate prediction result. A mathematical calculation relationship between the support water blocking effect and the water inflow is established. The support water blocking effect can be evaluated by a formula, and the tunnel water inflow can be predicted. This method improves the scientificity and accuracy of the prediction. By accurately predicting the water inflow and evaluating the water blocking effect of the support measures, the method helps to formulate preventive measures in advance, reduce construction risks, optimize the construction plan, and reduce the catastrophic consequences caused by insufficient prediction of water inflow, which has practical promotion and economic value. The overall calculation is based on the theory of groundwater dynamics and Darcy's law to ensure the scientificity of the prediction. At the same time, the calculation results of this method are not much different from the results of field verification, which shows its effectiveness in practical applications.

[0110] The method and device for predicting water inflow during tunnel construction period proposed by the present invention obtain tunnel construction data, obtain tunnel design parameters from the tunnel construction data, perform area equivalence processing on the tunnel cross section, equivalently obtain a circle with the same area, and determine the equivalent tunnel radius parameter based on the equivalent circle; determine the water head height, surrounding rock permeability coefficient and initial support permeability coefficient according to the geological parameters and tunnel design parameters in the tunnel construction project; determine the predicted water inflow of the tunnel face and the tunnel body during the tunnel construction period according to the tunnel radius parameters, water head height, surrounding rock permeability coefficient and initial support permeability coefficient. The overall scheme can accurately predict the water inflow of the tunnel face and the tunnel body during the tunnel construction period, provide data support for evaluating the water blocking effect of the tunnel body support measures, and has strong promotion and economic value.

[0111] The acquisition, storage, use, and processing of data in the technical solution of this application comply with the relevant provisions of laws and regulations.

[0112] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, devices, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0113] The present invention is described with reference to flowcharts and / or block diagrams of methods and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0114] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0115] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0116] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for predicting water inflow during tunnel construction, characterized in that: include: Obtain tunnel construction data; Acquire tunnel design parameters from the tunnel construction data, perform area equivalence processing on the tunnel cross section to obtain a circle with the same area, and determine the radius parameter of the equivalent tunnel based on the equivalent circle; Determine the water head height, surrounding rock permeability coefficient and initial support permeability coefficient based on the geological parameters and tunnel design parameters in the tunnel construction project; The predicted water inflow at the tunnel face and the tunnel body during the tunnel construction period is determined based on the tunnel radius parameters, water head height, surrounding rock permeability coefficient and initial support permeability coefficient.

2. The method for predicting water inflow during tunnel construction period according to claim 1, characterized in that: According to the geological parameters and tunnel design parameters in the tunnel construction project, the water head height, surrounding rock permeability coefficient and initial support permeability coefficient are determined, including: For tunnel construction projects, geological exploration work is carried out before the start of tunnel construction, and geological parameters and tunnel design parameters are determined through geological exploration data and tunnel construction information; According to the geological parameters and tunnel design parameters, the water head height, surrounding rock permeability coefficient and initial support permeability coefficient are determined.

3. The method for predicting water inflow during tunnel construction period according to claim 1, characterized in that: The method includes: When the water head height at the top of the tunnel is more than 8 times the diameter of the tunnel, ignoring the influence of the gravity of the water around the tunnel, the water pressure around the tunnel is constant.

4. The method for predicting water inflow during tunnel construction period according to claim 1, characterized in that: According to the tunnel radius parameters, water head height, surrounding rock permeability coefficient and initial support permeability coefficient, the predicted water inflow at the tunnel face and tunnel body during the tunnel construction period is determined, including: For the predicted water inflow of the tunnel body section, the tunnel body section is equivalent to multiple concentric cylinders, and the water inflow of the tunnel body section is determined based on the head height, surrounding rock permeability coefficient, calculated tunnel body length, initial support lining outer radius, inner radius and initial support permeability coefficient; among which, the length of the cylinder is consistent with the length of the tunnel body section.

5. The method for predicting water inflow during tunnel construction period according to claim 4, characterized in that: The calculation method for the predicted water inflow in the tunnel body is: In the formula, Q s1 is the predicted water inflow of the tunnel body; H is the water head height at the center of the circle; k m is the permeability coefficient of surrounding rock; L is the calculated length of the tunnel; r1 is the outer radius of the initial support lining; r2 is the inner radius; k1 is the permeability coefficient of the initial support; among them, when grouting reinforcement is not adopted, the grouting circle parameters are assigned to the outer radius of the initial support lining and the permeability coefficient of the initial support.

6. The method for predicting water inflow during tunnel construction period according to claim 1, characterized in that: According to the tunnel radius parameters, water head height, surrounding rock permeability coefficient and initial support permeability coefficient, the predicted water inflow at the tunnel face and tunnel body during the tunnel construction period is determined, including: For the predicted water inflow at the tunnel face during the tunnel construction period, the tunnel face is equivalent to a cylinder of a set length and the surrounding rock permeability coefficient is determined; The calculation method for the predicted water inflow at the tunnel face during the construction period is: In the formula, Q s2 is the predicted water inflow at the tunnel face during the construction period; H is the water head height at the center of the circle; k m is the surrounding rock permeability coefficient; r1 is the outer radius of the initial support lining.

7. A device for predicting water inflow during tunnel construction, characterized in that: include: Data acquisition module, used to acquire tunnel construction data; A tunnel section equivalent processing module is used to obtain tunnel design parameters from the tunnel construction data, perform area equivalent processing on the tunnel section, obtain a circle with the same area, and determine the radius parameter of the equivalent tunnel based on the equivalent circle; The parameter determination module is used to determine the water head height, surrounding rock permeability coefficient and initial support permeability coefficient according to the geological parameters and tunnel design parameters in the tunnel construction project; The water inflow prediction module is used to determine the predicted water inflow of the tunnel face and the tunnel body during the tunnel construction period according to the tunnel radius parameters, head height, surrounding rock permeability coefficient and initial support permeability coefficient.

8. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 6 is implemented.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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