A method for monitoring the stability of tunnel construction in a mountainous area with broken surrounding rocks

Abstract

The present invention discloses a method for monitoring the construction stability of a mountain tunnel with broken surrounding rocks. According to the technical solution provided by the present invention, the geological period data of the target tunnel are obtained; the structural data of the target tunnel are extracted from the geological period data of the target tunnel, a simulated three-dimensional model of the target tunnel is established according to the structural data of the target tunnel, and the basic parameters and the simulation method of the model unit are determined, so as to obtain the target three-dimensional model and further establish a three-dimensional numerical model; the construction process is simulated according to the determined excavation method to obtain simulated construction parameters; and the parameters are compared with the actual construction parameters obtained, and the construction stability is determined according to the comparison results. Through the present invention, the excavation and support methods can be scientifically selected by simulation, and various unfavorable geology existing in tunnels with soft and broken surrounding rocks can be effectively dealt with, so as to facilitate the formation of a bearing arch, and the construction stability can be judged by simulation, detection and comparison, which greatly reduces the possibility of accidents and improves construction safety.

Description

Technical Field

[0001] The present invention relates to the field of tunnel construction, and in particular to a method, system, computing device and computer storage medium for monitoring the stability of a broken surrounding rock mountain tunnel construction. Background Art

[0002] Transportation has always been a very important part of all matters related to the national economy and people's livelihood. Whether it is people's daily life, commercial logistics, or even military defense, transportation has an important impact on them. The construction of infrastructure related to transportation is the top priority. Among various transportation infrastructure construction, tunnel construction has always been the most important and difficult one. The difficulty of tunnel construction is that the tunnel construction process has extremely high requirements for safety. Once a safety accident occurs, the consequences are extremely serious. At the same time, the rock mass conditions at the tunnel construction location are complex, especially for soft and broken surrounding rock tunnels, which usually have a variety of unfavorable geology. It is difficult to form a bearing arch after excavation, and accidents such as tunnel collapse and instability of the levee are very likely to occur. Therefore, to ensure the safety of tunnel construction, it is necessary to reasonably select excavation methods and support methods and conduct targeted monitoring.

[0003] At present, there are still few technologies that select excavation methods and support methods according to the tunnel status and conduct monitoring and further comparison. Most of them provide an excavation method or support method for a specific situation. For example, CN106014421A discloses a rock tunnel excavation method with limited blasting vibration, using a down-the-hole drill to drill plum blossom-shaped holes similar to honeycomb coal in the inner circle around the tunnel, and then using a percussion hammer to hit the plum blossom-shaped holes to break the plum blossom-shaped hole wall rock to complete the cyclic excavation of the inner circle of the tunnel rock; and using a pneumatic drill to drill holes in the rock around the tunnel, split and blast to complete the rock tunnel excavation. CN106499398A discloses that for soft rock, based on the mechanical analysis of the anchor rod, the reserved excavation volume of the tunnel is determined and excavated according to it, and then this operation is repeated to gradually complete the tunnel excavation. CN114459539A also only discloses obtaining excavation safety information and analyzing the information to complete the full process monitoring of tunnel excavation. It can be seen that at present, it is not possible to automatically determine the excavation method and support method according to the tunnel conditions and conduct targeted comparison and monitoring to determine the stability of the construction. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a method system for monitoring the construction stability of a broken rock mountain tunnel and corresponding computing equipment and computer storage media.

[0005] According to one aspect of the present invention, a method for monitoring the stability of a mountain tunnel under broken surrounding rock is provided, comprising:

[0006] Acquire geological period data of the target tunnel; extract structural data of the target tunnel from the geological period data of the target tunnel, and establish a simulated three-dimensional model of the target tunnel based on the structural data of the target tunnel;

[0007] Determine the basic parameters in the simulation three-dimensional model and the simulation method of the model unit to obtain the target three-dimensional model; determine the excavation method of the target tunnel based on the target three-dimensional model;

[0008] Establish a three-dimensional numerical model based on the target three-dimensional model, simulate the target tunnel excavation construction process according to the excavation method, and obtain simulation construction parameters;

[0009] The actual construction parameters of the target tunnel are obtained, the actual construction parameters are compared with the simulated construction parameters, and the construction stability is determined based on the comparison results.

[0010] In the above solution, the structural data of the target tunnel at least includes: plane data, cross-section data and drilling data of the target tunnel;

[0011] The step of establishing a simulated three-dimensional model of the target tunnel according to the structural data of the target tunnel further comprises:

[0012] Generate structural parameters of the simulation 3D model based on the plane data, cross-section data and drilling data of the target tunnel;

[0013] According to the structural parameters of the simulated three-dimensional model, a simulated three-dimensional model of the target tunnel is established.

[0014] In the above scheme, determining the basic parameters in the simulation three-dimensional model and the simulation mode of the model unit to obtain the target three-dimensional model; and determining the excavation method of the target tunnel according to the target three-dimensional model further includes:

[0015] Determine the constitutive model used for the rock and soil material in the simulation 3D model, the constitutive model used for the initial support, and the solid unit used for the secondary lining, and complete the selection of basic parameters;

[0016] Determine the simulation method of the stiffness of the primary lining shotcrete; determine the simulation method of the advance small guide tube and anchor rod in the simulation 3D model;

[0017] The target three-dimensional model is obtained by setting the basic parameters and simulation methods in the simulation three-dimensional model;

[0018] According to the target three-dimensional model, the three-bench seven-step excavation invert following method was selected as the excavation method of the target tunnel.

[0019] In the above scheme, the three-dimensional numerical model is established according to the target three-dimensional model, the target tunnel excavation construction process is simulated according to the excavation method, and the simulation construction parameters are obtained, which further includes:

[0020] Using Midas GTS, a 3D numerical model is established based on the target 3D model;

[0021] According to the three-step seven-step excavation and invert following method, the excavation construction process was simulated for the three-dimensional numerical model;

[0022] The simulated construction parameters of the target tunnel excavation construction process are obtained according to the simulation results.

[0023] In the above scheme, comparing the actual construction parameters with the simulated construction parameters and determining the construction stability according to the comparison result further includes:

[0024] Determine the difference thresholds of various construction parameters;

[0025] The actual construction parameters are compared with the simulated construction parameters to obtain the actual difference values ​​of the various construction parameters as the comparison results;

[0026] Determine whether the actual value of the difference in the construction parameters in the comparison result is less than the corresponding difference threshold; if so, determine that the construction stability meets the standard and generate a notification that the stability meets the standard; if not, determine that the construction stability does not meet the standard and generate a warning that the stability does not meet the standard.

[0027] In the above scheme, the step of obtaining geological data of the target tunnel also includes:

[0028] Obtain surrounding rock images at different angles and determine the image acquisition time and location;

[0029] Optimize and correct the distortion of the tunnel surrounding rock image; the specific process of the image optimization step includes: image enhancement and noise reduction processing, image enhancement is to add information or data transformation to the original image; noise reduction processing uses mean filtering or median filtering algorithm to eliminate image noise;

[0030] The registration algorithm is used to accurately match the surrounding rock images at different angles at the same position to obtain the matching results. Then, the fusion algorithm is used to eliminate the color difference and exposure difference between the images. Finally, based on the spherical expansion algorithm, the surrounding rock images at different angles at the same position of the tunnel are spliced ​​according to the matching results to obtain a panoramic view of the tunnel surrounding rock.

[0031] In the above scheme, after obtaining the panoramic view of the tunnel surrounding rock, the method further includes:

[0032] Perform multi-layer wavelet decomposition on the tunnel surrounding rock panorama to obtain the wavelet coefficients of each frequency band;

[0033] Secondly, the wavelet coefficients of each frequency band are compared with the coefficient threshold. If the wavelet coefficient is greater than the coefficient threshold, the wavelet coefficients of the corresponding frequency band are enhanced.

[0034] Finally, the processed wavelet coefficients are reconstructed to obtain the enhanced panoramic view of the tunnel surrounding rock.

[0035] According to another aspect of the present invention, a stability monitoring system for construction of a broken rock mountain tunnel is provided, comprising: a construction module, a determination module, a simulation module and a comparison module; wherein:

[0036] The construction module is used to obtain geological period data of the target tunnel; extract structural data of the target tunnel from the geological period data of the target tunnel, and establish a simulated three-dimensional model of the target tunnel based on the structural data of the target tunnel;

[0037] The determination module is used to determine the basic parameters in the simulation three-dimensional model and the simulation method of the model unit to obtain the target three-dimensional model; and determine the excavation method of the target tunnel according to the target three-dimensional model;

[0038] The simulation module is used to establish a three-dimensional numerical model based on the target three-dimensional model, simulate the target tunnel excavation construction process according to the excavation method, and obtain simulation construction parameters;

[0039] The comparison module is used to obtain actual construction parameters of the target tunnel, compare the actual construction parameters with the simulated construction parameters, and determine the construction stability according to the comparison results.

[0040] According to another aspect of the present invention, there is provided a computing device, comprising: a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other via the communication bus;

[0041] The memory is used to store at least one executable instruction, and the executable instruction enables the processor to perform operations corresponding to the above-mentioned method for monitoring the construction stability of a broken rock mountain tunnel.

[0042] According to another aspect of the present invention, a computer storage medium is provided, wherein at least one executable instruction is stored in the storage medium, and the executable instruction enables a processor to execute operations corresponding to the above-mentioned method for monitoring the construction stability of a broken rock mountain tunnel.

[0043] According to the technical solution provided by the present invention, the geological period data of the target tunnel is obtained; the structural data of the target tunnel is extracted from the geological period data of the target tunnel, and a simulation three-dimensional model of the target tunnel is established according to the structural data of the target tunnel; the basic parameters in the simulation three-dimensional model and the simulation method of the model unit are determined to obtain the target three-dimensional model; the excavation method of the target tunnel is determined according to the target three-dimensional model; a three-dimensional numerical model is established according to the target three-dimensional model, and the excavation construction process of the target tunnel is simulated according to the excavation method to obtain the simulation construction parameters; the actual construction parameters of the target tunnel are obtained, and the actual construction parameters are compared with the simulation construction parameters, and the construction stability is determined according to the comparison results. By obtaining the geological period data of the target tunnel, the simulation three-dimensional model of the target tunnel is constructed using the structural data therein, and the constitutive model of the rock and soil material, the constitutive model of the initial support and the entity unit used in the second lining are further determined, the simulation method of the model unit is determined, the target three-dimensional model is obtained, and the tunnel excavation method is selected. By constructing the target three-dimensional model, the excavation and support methods are scientifically selected to effectively deal with various unfavorable geology existing in the soft and broken surrounding rock tunnel. Then, a three-dimensional numerical model is established based on the target three-dimensional model, so as to simulate and simulate the construction parameters obtained according to the excavation method, and the actual construction parameters detected are obtained at the same time. The simulated construction parameters are compared with the actual construction parameters. The construction stability of the project is accurately judged through simulation, detection and comparison, which greatly reduces the possibility of accidents such as tunnel collapse and instability of the back slope, and improves the safety of the construction process. In addition, before constructing the simulation three-dimensional model, it is also possible to collect surrounding rock images of the target tunnel at different angles, optimize and correct the distortion, and then splice the corresponding relationship to obtain a panoramic view of the tunnel surrounding rock, and then perform wavelet reconstruction and image enhancement on the panoramic view of the tunnel surrounding rock, so as to better obtain the image information and structural information of the target tunnel, so as to make the construction of the simulation three-dimensional model more accurate, so that the subsequent simulation process is more in line with the actual situation, greatly improving the accuracy of judging the construction stability, and helping to further improve the construction safety.

[0044] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0045] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0047] Figure 1 A schematic flow chart of a method for monitoring the construction stability of a mountain tunnel with broken surrounding rocks according to an embodiment of the present invention is shown;

[0048] Figure 2 A schematic diagram showing a flow chart of a method for determining tunnel construction stability according to an embodiment of the present invention is shown;

[0049] Figure 3 A schematic diagram of the process of a tunnel surrounding rock panorama stitching method according to an embodiment of the present invention is shown;

[0050] Figure 4 A schematic flow chart of a tunnel surrounding rock panorama image enhancement method based on wavelet reconstruction according to an embodiment of the present invention is shown;

[0051] Figure 5 It shows a structural block diagram of a stability monitoring system for construction of a broken surrounding rock mountain tunnel according to an embodiment of the present invention;

[0052] Figure 6 A schematic structural diagram of a computing device according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0053] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0054] Figure 1 FIG. 1 is a flow chart showing a method for monitoring the stability of a broken rock mountain tunnel construction according to an embodiment of the present invention. Figure 1 As shown, the method comprises the following steps:

[0055] Step S101, obtaining geological period data of a target tunnel; extracting structural data of the target tunnel from the geological period data of the target tunnel, and establishing a simulated three-dimensional model of the target tunnel according to the structural data of the target tunnel.

[0056] Preferably, the structural data of the target tunnel at least includes: plane data, cross-section data and drilling data of the target tunnel.

[0057] Specifically, the step of establishing a simulated three-dimensional model of the target tunnel according to the structural data of the target tunnel further includes:

[0058] Generate structural parameters of the simulation 3D model based on the plane data, cross-section data and drilling data of the target tunnel;

[0059] According to the structural parameters of the simulated three-dimensional model, a simulated three-dimensional model of the target tunnel is established.

[0060] Step S102, determining basic parameters in the simulation three-dimensional model and simulation methods of model units to obtain a target three-dimensional model; and determining a method for excavating a target tunnel according to the target three-dimensional model.

[0061] Specifically, determine the constitutive model used for the rock and soil material in the simulation three-dimensional model, the constitutive model used for the initial support, and the solid unit used for the secondary lining to complete the selection of basic parameters;

[0062] Determine the simulation method of various model units in the simulation three-dimensional model;

[0063] Determine the simulation method of the stiffness of the primary lining shotcrete; determine the simulation method of the advance small guide tube and anchor rod in the simulation 3D model;

[0064] The target three-dimensional model is obtained based on the basic parameters and simulation methods in the simulation three-dimensional model; the target tunnel excavation method is determined.

[0065] Preferably, the isotropic Mohr-Coulomb constitutive model is used for the rock and soil material, the elastic constitutive model is used for the initial support, and the solid element is used for the secondary lining;

[0066] Shell units that do not occupy space thickness are used to simulate the initial shotcrete of the tunnel, and the equivalent stiffness method is used to convert the stiffness of the steel mesh into the initial lining shotcrete. Beam units are used to simulate steel arch frames, implanted beams are used to simulate advanced large pipe sheds, and implanted trusses are used to simulate advanced small guide tubes and anchors.

[0067] According to the target three-dimensional model, the three-bench seven-step excavation invert arch following method was selected as the excavation method of the target tunnel, in which the invert arch following spacing is less than 10m.

[0068] Step S103, establishing a three-dimensional numerical model according to the target three-dimensional model, simulating the target tunnel excavation construction process according to the excavation method, and obtaining simulation construction parameters.

[0069] Specifically, Midas GTS (Midas finite element analysis software) is used to establish a three-dimensional numerical model based on the target three-dimensional model;

[0070] According to the three-step seven-step excavation and invert following method, the excavation construction process was simulated for the three-dimensional numerical model;

[0071] The simulated construction parameters of the target tunnel excavation construction process are obtained according to the simulation results.

[0072] Step S104, obtaining actual construction parameters of the target tunnel, comparing the actual construction parameters with the simulated construction parameters, and determining the construction stability according to the comparison results.

[0073] According to the method for monitoring the construction stability of a broken rock mountain tunnel provided by this embodiment, the geological period data of the target tunnel is obtained; the structural data of the target tunnel is extracted from the geological period data of the target tunnel, and a simulation three-dimensional model of the target tunnel is established according to the structural data of the target tunnel; the basic parameters in the simulation three-dimensional model and the simulation method of the model unit are determined to obtain the target three-dimensional model; the excavation method of the target tunnel is determined according to the target three-dimensional model; a three-dimensional numerical model is established according to the target three-dimensional model, and the excavation construction process of the target tunnel is simulated according to the excavation method to obtain the simulation construction parameters; the actual construction parameters of the target tunnel are obtained, and the actual construction parameters are compared with the simulation construction parameters, and the construction stability is determined according to the comparison results. By obtaining the geological period data of the target tunnel, the simulation three-dimensional model of the target tunnel is constructed using the structural data therein, and the constitutive model of the rock and soil material, the constitutive model of the initial support and the entity unit used in the second lining are further determined, the simulation method of the model unit is determined, the target three-dimensional model is obtained, and the tunnel excavation method is selected. By constructing the target three-dimensional model, the excavation and support methods are scientifically selected to effectively deal with various unfavorable geology existing in the soft and broken rock tunnel. Subsequently, a three-dimensional numerical model is established based on the target three-dimensional model to carry out simulation according to the excavation method, and the simulated construction parameters are obtained. At the same time, the actual construction parameters detected are obtained, and the simulated construction parameters are compared with the actual construction parameters. The construction stability of the project is accurately judged through simulation, detection and comparison, which greatly reduces the possibility of accidents such as tunnel collapse and slope instability, and improves the safety of the construction process.

[0074] In the above method, the process of determining the construction stability according to the comparison results is as follows: Figure 2 As shown, Figure 2 A schematic flow chart of a method for determining tunnel construction stability according to an embodiment of the present invention is shown. The method comprises the following steps:

[0075] Step S201, determining the difference threshold of each construction parameter.

[0076] Step S202, comparing the actual construction parameters with the simulated construction parameters, and obtaining the actual difference values ​​of the various construction parameters as the comparison results.

[0077] Step S203, determining whether the actual difference value of the construction parameter in the comparison result is less than the corresponding difference threshold.

[0078] Specifically, if yes, that is, the actual difference value is less than the corresponding difference threshold, then execute step S204; if no, that is, the actual difference value is not less than the corresponding difference threshold, then execute step S205.

[0079] Step S204, determining whether the construction stability meets the standards, and generating a notification that the stability meets the standards.

[0080] Step S205, determining that the construction stability does not meet the standards, and generating a warning that the stability does not meet the standards.

[0081] According to the tunnel construction stability determination method provided in this embodiment, by comparing the actual construction parameters with the simulated construction parameters to determine whether the comparison result is less than the preset difference threshold, the difference threshold can be set in a targeted manner to more scientifically and accurately determine whether the construction stability meets the standards, and the determination result can be sent directly to the management personnel so that they can obtain the stability determination result more intuitively and conveniently.

[0082] In the above method, the acquisition of geological data of the target tunnel also includes a method for stitching a panoramic view of the tunnel surrounding rock, such as Figure 3 As shown, Figure 3 A schematic flow chart of a tunnel surrounding rock panorama stitching method according to an embodiment of the present invention is shown, and the method comprises the following steps:

[0083] Step S301, obtaining surrounding rock images at different angles, and determining the image acquisition time and position.

[0084] Step S302, optimizing and correcting the distortion of the tunnel surrounding rock image; wherein the specific process of the image optimization step includes: performing image enhancement and noise reduction processing on the image, image enhancement by adding information or data transformation to the original image; and noise reduction processing by using mean filtering or median filtering algorithm to eliminate image noise.

[0085] In step S303, the surrounding rock images at different angles at the same position are accurately matched through the registration algorithm to obtain the matching results; then the fusion algorithm is used to eliminate the color difference and exposure difference between the images; finally, based on the spherical expansion algorithm, the surrounding rock images at different angles at the same position of the tunnel are spliced ​​according to the matching results to obtain a panoramic view of the tunnel surrounding rock.

[0086] According to the tunnel surrounding rock panoramic image stitching method provided in this embodiment, it is possible to obtain surrounding rock images at different angles, and after optimization and distortion correction, match the images at the same position to complete the stitching, so as to obtain a tunnel surrounding rock panoramic image with uniform color and exposure, and display the image of the tunnel at that position as a whole in one picture, so that the system or staff can obtain the overall image content intuitively and concisely, avoid the need to observe images from multiple angles for subsequent processing, reduce the workload of staff, and improve overall efficiency.

[0087] Furthermore, after obtaining the tunnel surrounding rock panorama, a tunnel surrounding rock panorama image enhancement method based on wavelet reconstruction is also included, such as Figure 4 As shown, Figure 4A schematic flow chart of a tunnel surrounding rock panorama image enhancement method based on wavelet reconstruction according to an embodiment of the present invention is shown. The method comprises the following steps:

[0088] Step S401, performing multi-layer wavelet decomposition on the tunnel surrounding rock panorama to obtain wavelet coefficients of each frequency band.

[0089] Step S402: Compare the wavelet coefficients of each frequency band with the coefficient threshold. If the wavelet coefficients are greater than the coefficient threshold, enhance the wavelet coefficients of the corresponding frequency band.

[0090] Step S403, performing wavelet reconstruction on the processed wavelet coefficients to obtain an enhanced panoramic view of the tunnel surrounding rock.

[0091] Preferably, the wavelet reconstruction is performed using the following algorithm:

[0092]

[0093] In the above formula, S k+1：y，x represents the digital signal of the tunnel surrounding rock panorama after enhancement; k represents the number of sampling points; y represents the number of pixels of the tunnel surrounding rock panorama in the vertical direction; x represents the number of pixels of the tunnel surrounding rock panorama in the horizontal direction; l represents the brightness factor of the tunnel surrounding rock panorama, j represents the two-dimensional discrete index of wavelet decomposition; H and G represent the conjugate filter pulse outputs; S k：y，x A digital signal representing the panoramic view of the tunnel surrounding rock before enhancement; D represents the decomposition factor; the numbers 1, 2, 3 in the upper right corner of the letter D represent the scale of decomposition.

[0094] According to the tunnel surrounding rock panoramic image enhancement method based on wavelet reconstruction provided in this embodiment, the tunnel surrounding rock panoramic image is subjected to wavelet reconstruction and image enhancement is completed on the tunnel surrounding rock panoramic image, so as to better obtain the image information and structural information of the target tunnel, and make the construction of the simulation three-dimensional model more accurate, so that the subsequent simulation process is more in line with the actual situation, which greatly improves the accuracy of judging the construction stability and helps to further improve the construction safety.

[0095] Figure 5 The structural block diagram of a broken rock mountain tunnel construction stability monitoring system according to an embodiment of the present invention is shown, the system comprises: a construction module 501, a determination module 502, a simulation module 503 and a comparison module 504; wherein,

[0096] The construction module 501 is used to obtain geological period data of the target tunnel; extract structural data of the target tunnel from the geological period data of the target tunnel, and establish a simulated three-dimensional model of the target tunnel according to the structural data of the target tunnel.

[0097] Specifically, the structural data of the target tunnel at least includes: plane data, cross-section data and drilling data of the target tunnel; the construction module 501 is further used to:

[0098] The step of establishing a simulated three-dimensional model of the target tunnel according to the structural data of the target tunnel further comprises:

[0099] Generate structural parameters of the simulation 3D model based on the plane data, cross-section data and drilling data of the target tunnel;

[0100] According to the structural parameters of the simulated three-dimensional model, a simulated three-dimensional model of the target tunnel is established.

[0101] Specifically, the construction module 501 is further used for:

[0102] Obtain surrounding rock images at different angles and determine the image acquisition time and location;

[0103] Optimize and correct the distortion of the tunnel surrounding rock image; the specific process of the image optimization step includes: image enhancement and noise reduction processing, image enhancement is to add information or data transformation to the original image; noise reduction processing uses mean filtering or median filtering algorithm to eliminate image noise;

[0104] The registration algorithm is used to accurately match the surrounding rock images at different angles at the same position to obtain the matching results. Then, the fusion algorithm is used to eliminate the color difference and exposure difference between the images. Finally, based on the spherical expansion algorithm, the surrounding rock images at different angles at the same position of the tunnel are spliced ​​according to the matching results to obtain a panoramic view of the tunnel surrounding rock.

[0105] Specifically, the construction module 501 is further used for:

[0106] Perform multi-layer wavelet decomposition on the tunnel surrounding rock panorama to obtain the wavelet coefficients of each frequency band;

[0107] Secondly, the wavelet coefficients of each frequency band are compared with the coefficient threshold. If the wavelet coefficient is greater than the coefficient threshold, the wavelet coefficients of the corresponding frequency band are enhanced.

[0108] Finally, the processed wavelet coefficients are reconstructed to obtain the enhanced panoramic view of the tunnel surrounding rock.

[0109] Preferably, the wavelet reconstruction is performed using the following algorithm:

[0110]

[0111] In the above formula, S k+1：y，xrepresents the digital signal of the tunnel surrounding rock panorama after enhancement; k represents the number of sampling points; y represents the number of pixels of the tunnel surrounding rock panorama in the vertical direction; x represents the number of pixels of the tunnel surrounding rock panorama in the horizontal direction; l represents the brightness factor of the tunnel surrounding rock panorama, j represents the two-dimensional discrete index of wavelet decomposition; H and G represent the conjugate filter pulse outputs; S k：y,x A digital signal representing the panoramic view of the tunnel surrounding rock before enhancement; D represents the decomposition factor; the numbers 1, 2, 3 in the upper right corner of the letter D represent the scale of decomposition.

[0112] The determination module 502 is used to determine the basic parameters in the simulation three-dimensional model and the simulation method of the model unit to obtain the target three-dimensional model; and determine the excavation method of the target tunnel according to the target three-dimensional model.

[0113] Specifically, the determining module 502 is further configured to:

[0114] Determine the constitutive model used for the rock and soil material in the simulation 3D model, the constitutive model used for the initial support, and the solid unit used for the secondary lining, and complete the selection of basic parameters;

[0115] Determine the simulation method of the stiffness of the primary lining shotcrete; determine the simulation method of the advance small guide tube and anchor rod in the simulation 3D model;

[0116] The target three-dimensional model is obtained by setting the basic parameters and simulation methods in the simulation three-dimensional model;

[0117] According to the target three-dimensional model, the three-bench seven-step excavation invert following method was selected as the excavation method of the target tunnel.

[0118] The simulation module 503 is used to establish a three-dimensional numerical model according to the target three-dimensional model, simulate the target tunnel excavation construction process according to the excavation method, and obtain simulation construction parameters.

[0119] Specifically, the simulation module 503 is further used for:

[0120] Using Midas GTS, a 3D numerical model is established based on the target 3D model;

[0121] According to the three-step seven-step excavation and invert following method, the excavation construction process was simulated for the three-dimensional numerical model;

[0122] The simulated construction parameters of the target tunnel excavation construction process are obtained according to the simulation results.

[0123] The comparison module 504 is used to obtain actual construction parameters of the target tunnel, compare the actual construction parameters with the simulated construction parameters, and determine the construction stability according to the comparison results.

[0124] Specifically, the comparison module 504 is further used for:

[0125] Determine the difference thresholds of various construction parameters;

[0126] The actual construction parameters are compared with the simulated construction parameters to obtain the actual difference values ​​of the various construction parameters as the comparison results;

[0127] Determine whether the actual value of the difference in the construction parameters in the comparison result is less than the corresponding difference threshold; if so, determine that the construction stability meets the standard and generate a notification that the stability meets the standard; if not, determine that the construction stability does not meet the standard and generate a warning that the stability does not meet the standard.

[0128] The construction stability monitoring system of a broken rock mountain tunnel provided by this embodiment includes: a construction module, a determination module, a simulation module and a comparison module; wherein the construction module is used to obtain geological period data of the target tunnel; extract the structural data of the target tunnel from the geological period data of the target tunnel, and establish a simulation three-dimensional model of the target tunnel according to the structural data of the target tunnel; the determination module is used to determine the basic parameters in the simulation three-dimensional model and the simulation method of the model unit to obtain the target three-dimensional model; determine the excavation method of the target tunnel according to the target three-dimensional model; the simulation module is used to establish a three-dimensional numerical model according to the target three-dimensional model, simulate the excavation construction process of the target tunnel according to the excavation method, and obtain the simulation construction parameters; the comparison module is used to obtain the actual construction parameters of the target tunnel, compare the actual construction parameters with the simulation construction parameters, and determine the construction stability according to the comparison results. By obtaining the geological period data of the target tunnel, using the structural data therein to construct a simulation three-dimensional model of the target tunnel, and further determining the constitutive model of the rock and soil material, the constitutive model of the initial support and the entity unit used in the second lining, determining the simulation method of the model unit, obtaining the target three-dimensional model, and selecting the tunnel excavation method. By constructing a target three-dimensional model, scientifically selecting excavation and support methods, and effectively dealing with various unfavorable geological conditions in soft and broken surrounding rock tunnels. Subsequently, a three-dimensional numerical model is established based on the target three-dimensional model, so as to simulate and simulate according to the excavation method, obtain the simulated construction parameters, and obtain the actual construction parameters detected at the same time, compare the simulated construction parameters with the actual construction parameters, and accurately judge the construction stability of the project through simulation, detection and comparison, which greatly reduces the possibility of accidents such as tunnel collapse and instability of the back slope, and improves the safety of the construction process. In addition, before constructing the simulation three-dimensional model, it is also possible to collect surrounding rock images of the target tunnel at different angles, optimize and correct distortion, and splice them according to the corresponding relationship to obtain a panoramic view of the tunnel surrounding rock, and then perform wavelet reconstruction and image enhancement on the panoramic view of the tunnel surrounding rock, so as to better obtain the image information and structural information of the target tunnel, so as to make the construction of the simulation three-dimensional model more accurate, so that the subsequent simulation process is more in line with the actual situation, greatly improving the accuracy of judging the construction stability, and helping to further improve the construction safety.

[0129] The present invention also provides a non-volatile computer storage medium, which stores at least one executable instruction, and the executable instruction can execute the method for monitoring the construction stability of a broken surrounding rock mountain tunnel in any of the above method embodiments.

[0130] Figure 6 A schematic diagram of the structure of a computing device according to an embodiment of the present invention is shown. The specific embodiment of the present invention does not limit the specific implementation of the computing device.

[0131] like Figure 6 As shown, the computing device may include: a processor (processor) 602 , a communications interface (Communications Interface) 604 , a memory (memory) 606 , and a communication bus 608 .

[0132] in:

[0133] The processor 602 , the communication interface 604 , and the memory 606 communicate with each other via a communication bus 608 .

[0134] The communication interface 604 is used to communicate with other devices such as clients or other servers.

[0135] The processor 602 is used to execute the program 610, and specifically can execute the relevant steps implemented in the above-mentioned broken rock mountain tunnel construction stability monitoring method system embodiment.

[0136] Specifically, the program 610 may include program codes, and the program codes include computer operation instructions.

[0137] The processor 602 may be a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention. The one or more processors included in the computing device may be processors of the same type, such as one or more CPUs; or may be processors of different types, such as one or more CPUs and one or more ASICs.

[0138] The memory 606 is used to store the program 610. The memory 606 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0139] Program 610 can be specifically used to enable processor 602 to execute the method for monitoring the construction stability of a broken rock mountain tunnel in any of the above-mentioned embodiments. The specific implementation of each step in program 610 can refer to the corresponding descriptions in the corresponding steps and units in the above-mentioned embodiment of the method for monitoring the construction stability of a broken rock mountain tunnel, which will not be repeated here. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the above-mentioned equipment and modules can refer to the corresponding process description in the above-mentioned method embodiment, which will not be repeated here.

[0140] The algorithm and display provided herein are not inherently related to any particular computer, virtual system or other device. Various general purpose systems can also be used together with the teachings based on this. According to the above description, it is obvious that the structure required for constructing such systems. In addition, the present invention is not directed to any specific programming language either. It should be understood that various programming languages ​​can be utilized to realize the content of the present invention described herein, and the description of the above specific languages ​​is for disclosing the best mode of the present invention.

[0141] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0142] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the intention that the claimed invention requires more features than those expressly recited in each claim. Rather, as reflected in the claims, inventive aspects lie in less than all of the features of the individual embodiments previously disclosed. Therefore, the claims that follow the detailed description are hereby expressly incorporated into the detailed description, with each claim itself serving as a separate embodiment of the present invention.

[0143] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and in addition they may be divided into a plurality of submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0144] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0145] The various component embodiments of the present invention can be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It should be understood by those skilled in the art that a microprocessor or digital signal processor (DSP) can be used in practice to implement some or all of the functions of some or all of the components in the embodiments of the present invention. The present invention can also be implemented as a device or apparatus program (e.g., computer program and computer program product) for executing part or all of the methods described herein. Such a program implementing the present invention can be stored on a computer-readable medium, or can have the form of one or more signals. Such a signal can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.

[0146] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for monitoring the stability of a tunnel under broken surrounding rock. include: Obtain geological data of the target tunnel; Extracting the structural data of the target tunnel from the geological data of the target tunnel, and establishing a simulated three-dimensional model of the target tunnel based on the structural data of the target tunnel; generating structural parameters of the simulated three-dimensional model based on the plane data, cross-section data and drilling data of the target tunnel; According to the structural parameters of the simulated three-dimensional model, a simulated three-dimensional model of the target tunnel is established; wherein the structural data of the target tunnel includes at least: plane data, cross-section data and drilling data of the target tunnel; wherein obtaining the geological period data of the target tunnel also includes: obtaining surrounding rock images at different angles, determining the image acquisition time and position; optimizing and correcting the distortion of the tunnel surrounding rock images; wherein the specific process of the image optimization step includes: image enhancement and noise reduction processing of the image, image enhancement by adding information or data transformation to the original image; noise reduction processing using mean filtering or median filtering algorithm to eliminate image noise; accurate matching of surrounding rock images at different angles at the same position by a registration algorithm to obtain matching results; then using a fusion algorithm to eliminate color differences and exposure differences between images; finally, based on the spherical expansion algorithm, the surrounding rock images at different angles at the same position of the tunnel are spliced ​​according to the matching results to obtain a panoramic view of the tunnel surrounding rock; Determine the basic parameters in the simulation three-dimensional model and the simulation method of the model unit to obtain the target three-dimensional model; determine the excavation method of the target tunnel based on the target three-dimensional model; among them, determine the constitutive model used for the rock and soil material, the constitutive model used for the initial support, and the solid unit used for the secondary lining in the simulation three-dimensional model to complete the selection of basic parameters; determine the simulation method of the stiffness of the primary lining shotcrete; determine the simulation method of the advance small guide tube and anchor rod in the simulation three-dimensional model; set based on the basic parameters and simulation method in the simulation three-dimensional model to obtain the target three-dimensional model; for the target three-dimensional model, select the three-step seven-step excavation arch following method as the excavation method of the target tunnel; Establish a three-dimensional numerical model based on the target three-dimensional model, simulate the target tunnel excavation construction process according to the excavation method, and obtain simulation construction parameters; The actual construction parameters of the target tunnel are obtained, and the actual construction parameters are compared with the simulated construction parameters, and the construction stability is determined according to the comparison results; wherein, the difference threshold of each construction parameter is determined; the actual construction parameters are compared with the simulated construction parameters, and the actual difference value of each construction parameter is obtained as the comparison result; it is determined whether the actual difference value of the construction parameter in the comparison result is less than the corresponding difference threshold; if so, it is determined that the construction stability meets the standard, and a notification that the stability meets the standard is generated; if not, it is determined that the construction stability does not meet the standard, and a warning that the stability does not meet the standard is generated.

2. The method according to claim 1, It is characterized in that The method of establishing a three-dimensional numerical model according to the target three-dimensional model, simulating the target tunnel excavation construction process according to the excavation method, and obtaining simulation construction parameters further includes: Using Midas GTS, a 3D numerical model is established based on the target 3D model; According to the three-step seven-step excavation and invert following method, the excavation construction process was simulated for the three-dimensional numerical model; The simulated construction parameters of the target tunnel excavation construction process are obtained according to the simulation results.

3. The method according to claim 1, It is characterized in that After obtaining the panoramic view of the tunnel surrounding rock, the method further includes: Perform multi-layer wavelet decomposition on the tunnel surrounding rock panorama to obtain the wavelet coefficients of each frequency band; Secondly, the wavelet coefficients of each frequency band are compared with the coefficient threshold. If the wavelet coefficient is greater than the coefficient threshold, the wavelet coefficients of the corresponding frequency band are enhanced. Finally, the processed wavelet coefficients are reconstructed to obtain the enhanced panoramic view of the tunnel surrounding rock.

4. A stability monitoring system for tunnel construction in a broken rock mountain area. include: Construction module, determination module, simulation module and comparison module; wherein, The construction module is used to obtain geological period data of the target tunnel; extract structural data of the target tunnel from the geological period data of the target tunnel, and establish a simulated three-dimensional model of the target tunnel according to the structural data of the target tunnel; generate structural parameters of the simulated three-dimensional model based on the plane data, cross-section data and drilling data of the target tunnel; establish a simulated three-dimensional model of the target tunnel according to the structural parameters of the simulated three-dimensional model; wherein the structural data of the target tunnel at least includes: the plane data, cross-section data and drilling data of the target tunnel; wherein obtaining the geological period data of the target tunnel also includes: obtaining surrounding rock images at different angles, determining Image acquisition time and location; optimization and distortion correction of tunnel surrounding rock images; the specific process of the image optimization step includes: image enhancement and noise reduction processing, image enhancement by adding information or data transformation to the original image; noise reduction processing using mean filtering or median filtering algorithm to eliminate image noise; accurate matching of surrounding rock images at different angles at the same position through the registration algorithm to obtain matching results; then using the fusion algorithm to eliminate the color difference and exposure difference between the images; finally, based on the spherical expansion algorithm, the surrounding rock images at different angles at the same position of the tunnel are spliced ​​according to the matching results to obtain a panoramic view of the tunnel surrounding rock; The determination module is used to determine the basic parameters and the simulation mode of the model unit in the simulation three-dimensional model to obtain the target three-dimensional model; determine the excavation method of the target tunnel according to the target three-dimensional model; wherein, the constitutive model used for the rock and soil material, the constitutive model used for the initial support and the solid unit used for the secondary lining in the simulation three-dimensional model are determined to complete the selection of basic parameters; determine the simulation mode of the stiffness of the primary lining shotcrete; determine the simulation mode of the advance small guide tube and the anchor rod in the simulation three-dimensional model; set based on the basic parameters and simulation mode in the simulation three-dimensional model to obtain the target three-dimensional model; for the target three-dimensional model, select the three-step seven-step excavation arch following method as the excavation method of the target tunnel; The simulation module is used to establish a three-dimensional numerical model based on the target three-dimensional model, simulate the target tunnel excavation construction process according to the excavation method, and obtain simulation construction parameters; The comparison module is used to obtain actual construction parameters of the target tunnel, compare the actual construction parameters with the simulated construction parameters, and determine the construction stability according to the comparison result; wherein, the difference threshold of each construction parameter is determined; the actual construction parameters are compared with the simulated construction parameters to obtain the actual value of the difference of each construction parameter as the comparison result; it is determined whether the actual value of the difference of the construction parameter in the comparison result is less than the corresponding difference threshold; if so, it is determined that the construction stability meets the standard and a notification that the stability meets the standard is generated; if not, it is determined that the construction stability does not meet the standard and a warning that the stability does not meet the standard is generated.

5. A computing device, include: A processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other via the communication bus; The memory is used to store at least one executable instruction, and the executable instruction enables the processor to perform operations corresponding to the method for monitoring the construction stability of a broken rock mountain tunnel as described in any one of claims 1-4.

6. A computer storage medium, wherein at least one executable instruction is stored in the storage medium, and wherein the executable instruction enables a processor to execute operations corresponding to the method for monitoring the construction stability of a broken rock mountain tunnel as described in any one of claims 1 to 4.

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