Dynamic response holographic sensing method and system for railway tunnel passing through active fault zone

Abstract

The invention provides a dynamic response holographic sensing method and system for a railway tunnel crossing an active fault zone, and relates to the technical field of tunnel safety. The monitoring data of the multiple dimensions comprises first dimension data obtained through monitoring based on a touch sensor, second dimension data obtained through monitoring based on a visual sensor, and third dimension data obtained through monitoring based on an auditory sensor; determining limit thresholds of tunnel damage level intervals to which the first dimension data, the second dimension data and the third dimension data belong respectively; corresponding weights are given to the determined multiple limit thresholds respectively, summation calculation is carried out on the multiple limit thresholds based on the weights, and a safety state index of the tunnel is obtained; and determining whether the tunnel is in a safe state based on the safe state index of the tunnel. The problem that the accuracy is not high when the tunnel safety state is determined is solved.

Description

Technical Field

[0001] The present application relates to the field of tunnel safety technology, and in particular to a method and system for holographic perception of dynamic response of a railway tunnel passing through an active fault zone. Background Art

[0002] As an important part of the rapid rail transit system, tunnels have relatively good earthquake resistance due to the constraints of the surrounding soil. However, under strong earthquakes, tunnel structures may still suffer serious damage, especially when they cross faults. Therefore, real-time monitoring of the safety status of tunnel structures is very necessary.

[0003] The traditional method mainly obtains the stress-strain data of the tunnel surrounding rock, judges the deformation degree of the tunnel based on the stress-strain data of the tunnel surrounding rock, and then determines whether the tunnel is in a safe state based on the deformation degree.

[0004] However, the information obtained by traditional monitoring methods is relatively single, and the safety status of the tunnel cannot be accurately determined based solely on the stress-strain data of the tunnel surrounding rock. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a method and system for holographic perception of the dynamic response of a railway tunnel passing through an active fault zone.

[0006] In a first aspect, the present application provides a method for holographic perception of dynamic response of a railway tunnel passing through an active fault zone, comprising:

[0007] Acquire monitoring data of multiple dimensions of the tunnel, wherein the monitoring data of the multiple dimensions include: first dimensional data obtained based on monitoring by a tactile sensor, second dimensional data obtained based on monitoring by a visual sensor, and third dimensional data obtained based on monitoring by an auditory sensor, wherein the first dimensional data is used to characterize the stress condition and deformation of the tunnel structure, the second dimensional data is used to characterize the surface deformation of the tunnel, and the third dimensional data is used to characterize the internal damage of the tunnel;

[0008] Determine the limit thresholds of the tunnel damage level intervals to which the first dimensional data, the second dimensional data, and the third dimensional data respectively belong;

[0009] Assigning corresponding weights to the determined multiple limit thresholds respectively, and summing and calculating the multiple limit thresholds based on the weights to obtain a safety status index of the tunnel;

[0010] It is determined whether the tunnel is in a safe state based on the safety state index of the tunnel.

[0011] In some embodiments, before acquiring the monitoring data of multiple dimensions of the tunnel, the method further includes:

[0012] Performing numerical simulation on the tunnel to obtain a tunnel model corresponding to the tunnel;

[0013] Based on the tunnel model, the longitudinal deformation law of the tunnel structure of the tunnel under different seismic accelerations is obtained, and based on the longitudinal deformation law of the tunnel structure, the optimal layout positions corresponding to each sensor are determined.

[0014] In some embodiments, the performing numerical simulation on the tunnel to obtain a tunnel model corresponding to the tunnel includes:

[0015] Acquiring design documents of the tunnel, actual engineering geological data of the tunnel, actual hydrogeological data of the tunnel, and mechanical parameters of surrounding rocks of the tunnel;

[0016] A numerical simulation is performed based on the design document, the actual engineering geological data, the actual hydrogeological data, and the surrounding rock mechanical parameters to obtain a tunnel model corresponding to the tunnel.

[0017] In some embodiments, the obtaining of monitoring data of multiple dimensions of the tunnel includes:

[0018] By reading the sensor data deployed at each of the optimal layout positions, the force data of the tunnel, the tunnel structure deformation data, the surface deformation of the tunnel, and the internal damage data of the tunnel are obtained as monitoring data of multiple dimensions of the tunnel.

[0019] In some embodiments, the tactile sensor includes: a soil pressure gauge, a steel bar gauge, an embedded strain gauge, a static level, a vibration sensor, a laser displacement meter, a WSS flexible monitoring unit, and a laser range sensing fulcrum; the visual sensor includes: a speckle image strain measurement system and / or an infrared thermal imager; the auditory sensor includes: an acoustic emission system;

[0020] The first dimensional data includes: multiple data of the tunnel stress data, tunnel bottom deformation and vibration data, deformation joint displacement data, dislocation deformation data of the tunnel structure, and structural deformation data of the tunnel lining; the second dimensional data includes: tunnel surface deformation data and / or tunnel internal damage data; the third dimensional data includes: tunnel internal damage data.

[0021] In some embodiments, before assigning corresponding weights to the determined multiple limit thresholds respectively and summing the multiple limit thresholds based on the weights to obtain the security status index of the tunnel, the method further includes:

[0022] determining whether the third dimensional data includes a lining damage waveform;

[0023] If so, it is determined that the tunnel is in the highest level of unsafe state.

[0024] In some embodiments, the method further comprises:

[0025] When it is determined that no earthquake has occurred, controlling the tactile sensor, the visual sensor, and the auditory sensor to collect data at a first frequency;

[0026] When it is determined that an earthquake occurs, the tactile sensor, the visual sensor, and the auditory sensor are controlled to collect data at a second frequency, where the second frequency is greater than the first frequency.

[0027] In some embodiments, the safety status of the tunnel includes: a healthy status, a slightly damaged status, a moderately damaged status, a severely damaged status, and a destroyed status;

[0028] After determining the security status of the tunnel, determining corresponding prompt information according to the security status of the tunnel;

[0029] The prompt information is sent to the mobile device.

[0030] In a second aspect, an embodiment of the present application provides a dynamic response holographic perception system for a railway tunnel passing through an active fault zone, including: a processing module; the processing module includes:

[0031] an acquisition unit, configured to acquire monitoring data of multiple dimensions of the tunnel, wherein the monitoring data of the multiple dimensions include: first dimensional data obtained based on monitoring by a tactile sensor, second dimensional data obtained based on monitoring by a visual sensor, and third dimensional data obtained based on monitoring by an auditory sensor, wherein the first dimensional data is used to characterize the stress condition of the tunnel and the deformation of the tunnel structure, the second dimensional data is used to characterize the surface deformation of the tunnel, and the third dimensional data is used to characterize the internal damage of the tunnel;

[0032] A determination unit, used to determine the limit thresholds of the tunnel damage level intervals to which the first dimensional data, the second dimensional data, and the third dimensional data respectively belong;

[0033] A calculation unit, configured to assign corresponding weights to the determined multiple limit thresholds respectively, and sum the multiple limit thresholds based on the weights to obtain a safety status index of the tunnel;

[0034] A judging unit is used to determine whether the tunnel is in a safe state based on the safety state index of the tunnel.

[0035] In some embodiments, the processing module further includes:

[0036] A numerical simulation unit, used for performing numerical simulation on the tunnel to obtain a tunnel model corresponding to the tunnel;

[0037] Based on the tunnel model, the longitudinal deformation law of the tunnel structure of the tunnel under different seismic accelerations is obtained, and based on the longitudinal deformation law of the tunnel structure, the optimal layout positions corresponding to each sensor are determined.

[0038] In some embodiments, the numerical simulation module is specifically used to obtain the design documents of the tunnel, the actual engineering geological data of the tunnel, the actual hydrogeological data of the tunnel, and the surrounding rock mechanical parameters of the tunnel;

[0039] A numerical simulation is performed based on the design document, the actual engineering geological data, the actual hydrogeological data, and the surrounding rock mechanical parameters to obtain a tunnel model corresponding to the tunnel.

[0040] In some embodiments, the acquisition unit is specifically used to obtain the force data of the tunnel, the tunnel structure deformation data, the surface deformation of the tunnel, and the internal damage data of the tunnel by reading the sensor data deployed at each of the optimal layout positions, as monitoring data of multiple dimensions of the tunnel.

[0041] In some embodiments, the tactile sensor includes: a soil pressure gauge, a steel bar gauge, an embedded strain gauge, a static level, a vibration sensor, a laser displacement meter, a WSS flexible monitoring unit, and a laser range sensing fulcrum; the visual sensor includes: a speckle image strain measurement system and / or an infrared thermal imager; the auditory sensor includes: an acoustic emission system;

[0042] The first dimensional data includes: multiple data of the tunnel stress data, tunnel bottom deformation and vibration data, deformation joint displacement data, dislocation deformation data of the tunnel structure, and structural deformation data of the tunnel lining; the second dimensional data includes: tunnel surface deformation data and / or tunnel internal damage data; the third dimensional data includes: tunnel internal damage data.

[0043] In some embodiments, the judgment unit is further used to judge whether the third dimensional data includes a lining damage waveform;

[0044] If so, it is determined that the tunnel is in the highest level of unsafe state.

[0045] In some embodiments, the processing module further includes:

[0046] A control unit module, for controlling the tactile sensor, the visual sensor, and the auditory sensor to collect data at a first frequency when it is determined that no earthquake has occurred;

[0047] When it is determined that an earthquake occurs, the tactile sensor, the visual sensor, and the auditory sensor are controlled to collect data at a second frequency, where the second frequency is greater than the first frequency.

[0048] In some embodiments, the safety status of the tunnel includes: a healthy status, a slightly damaged status, a moderately damaged status, a severely damaged status, and a destroyed status;

[0049] The system further comprises: a management module, which is used to send the prompt information to a mobile terminal device.

[0050] In a third aspect, an embodiment of the present application provides an electronic device comprising: a memory and a processor, wherein the memory is used to store a computer program, and the processor is used to execute the holographic perception method of the dynamic response of a railway tunnel passing through an active fault zone described in the first aspect or any optional implementation manner of the first aspect when calling the computer program.

[0051] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for holographic perception of the dynamic response of a railway tunnel passing through an active fault zone as described in the first aspect or any optional implementation manner of the first aspect.

[0052] Compared with the prior art, the technical solution provided by the embodiments of the present application has the following advantages:

[0053] The embodiment of the present application provides a holographic perception method for the dynamic response of a railway tunnel crossing an active fault zone. By monitoring the tunnel using sensors of multiple dimensions such as tactile sensors, visual sensors, and auditory sensors, monitoring data of multiple dimensions are obtained. The monitoring data of multiple dimensions can reflect the actual situation of the tunnel from multiple angles. Therefore, combining the monitoring data of multiple dimensions can accurately determine whether the tunnel is in a safe state. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0055] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0056] Figure 1A A schematic diagram of a tunnel crossing a fault zone provided in one embodiment of the present application;

[0057] Figure 1B A schematic diagram of a tunnel cross section provided for an embodiment of the present application;

[0058] Figure 2 This is a flowchart of the steps of a holographic perception method for dynamic response of a railway tunnel passing through an active fault zone provided by an embodiment of the present application;

[0059] Figure 3 This is a schematic diagram of a tunnel model provided by an embodiment of the present application;

[0060] Figure 4A is a schematic diagram of the installation positions of multiple sensors provided by an embodiment of the present application;

[0061] Figure 4B is a schematic diagram of the installation positions of multiple sensors provided by an embodiment of the present application;

[0062] Figure 4C is a schematic diagram of the installation position of a sensor provided in one embodiment of the present application;

[0063] Figure 5 This is a structural block diagram of a dynamic response holographic perception system for a railway tunnel passing through an active fault zone provided by an embodiment of the present application;

[0064] Figure 6 A structural block diagram of an electronic device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0065] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0066] Based on the exemplary embodiments described in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the claims attached to this application. In addition, although the disclosure in this application is introduced according to one or several exemplary examples, it should be understood that each aspect of these disclosures can also constitute a complete implementation method separately. It should be noted that the brief description of the terms in this application is only for the convenience of understanding the implementation methods described below, and is not intended to limit the implementation methods of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0067] As an important part of the rapid rail transit system, the tunnel has shown relatively excellent seismic resistance due to the constraints of the surrounding soil. However, under the action of strong earthquakes, the tunnel structure may still be damaged, especially when the tunnel passes through a fault. Therefore, it is necessary to monitor the safety status of the tunnel structure in order to evaluate the safety status of the tunnel structure. In the related technology, perception monitoring means are used to obtain real and effective monitoring data. However, the monitoring means used in the related technology independently perceive a single structural indicator, and it is impossible to quickly and accurately couple the analysis and comprehensive judgment of various types of information to accurately judge the safety status of the tunnel.

[0068] Based on the above situation, an embodiment of the present application provides a holographic perception method for the dynamic response of a railway tunnel passing through an active fault zone. The tunnel is monitored by using sensors in multiple dimensions of touch, vision, and hearing to obtain monitoring data in multiple dimensions. The monitoring data in multiple dimensions can reflect the actual situation of the tunnel from multiple angles. Therefore, the combination of monitoring data in multiple dimensions can accurately determine whether the tunnel is in a safe state.

[0069] The holographic perception method of the dynamic response of a railway tunnel passing through an active fault zone provided in the embodiment of the present application can be applied to the scenario of safety assessment of railway tunnels. For example, the holographic perception method of the dynamic response of a railway tunnel passing through an active fault zone provided in the embodiment of the present application can be applied to Figure 1A The safety status of the tunnel shown is monitored. Figure 1A As shown, Figure 1A This is a schematic diagram of a tunnel crossing a fault zone. When a tunnel crosses a fault zone, the following will occur: Figure 1B As shown in the multiple sections, in the embodiment of the present application, the safety status of the tunnel is determined by monitoring the multiple sections.

[0070] The method can be performed by a dynamic response holographic perception system of a railway tunnel passing through an active fault zone, or by a module constituting the system, which can be implemented by software and / or hardware, and which can be integrated in an electronic device with a data processing function. The electronic device can include, but is not limited to, a laptop, a tablet PC, a desktop computer, a server, an edge computing platform, or a server cluster.

[0071] Figure 2 The following is a schematic diagram of a process flow of a holographic sensing method for dynamic response of a railway tunnel passing through an active fault zone provided by an embodiment of the present application. Figure 2 As shown, the holographic perception method of the dynamic response of a railway tunnel crossing an active fault zone may include the following steps:

[0072] S21. Acquire monitoring data of multiple dimensions of the tunnel, where the monitoring data of multiple dimensions include: first dimensional data obtained based on monitoring by a tactile sensor, second dimensional data obtained based on monitoring by a visual sensor, and third dimensional data obtained based on monitoring by an auditory sensor.

[0073] The first dimension data is used to characterize the stress condition of the tunnel and the deformation of the tunnel structure, the second dimension data is used to characterize the surface deformation of the tunnel, and the third dimension data is used to characterize the internal damage of the tunnel. The monitoring data of multiple dimensions include the holographic perception data of each section, that is, the holographic perception data of each section includes: the first dimension data obtained by monitoring based on the tactile sensor, the second dimension data obtained by monitoring based on the visual sensor, and the third dimension data obtained by monitoring based on the auditory sensor. The tunnel can be a railway tunnel that passes through an active fault zone.

[0074] Exemplarily, the tactile sensor may include: soil pressure gauge, steel bar gauge, embedded strain gauge, static level, vibration sensor, laser displacement meter, WSS flexible monitoring unit, and laser ranging sensing fulcrum; the visual sensor includes: speckle image strain measurement system and / or infrared thermal imager; the auditory sensor includes: acoustic emission system. Among them, the soil pressure gauge can be a vibrating wire soil pressure gauge, the embedded strain gauge can be a vibrating wire embedded strain gauge, and the laser ranging sensing fulcrum can be an omnidirectional tilt laser ranging sensing fulcrum. Sensors in various dimensions form a holographic perception sensor.

[0075] Correspondingly, the first dimension data obtained based on the monitoring of the tactile sensor may include: tunnel force data, tunnel bottom deformation and vibration data, deformation joint displacement data, tunnel structure dislocation deformation data, tunnel lining structural deformation data; the second dimension data includes: tunnel surface deformation data and / or tunnel internal damage data; the third dimension data includes: tunnel internal damage data. That is, the holographic perception data is obtained based on the monitoring of the holographic perception sensor.

[0076] Exemplarily, the stress data of the tunnel may include at least one of the secondary lining stress LF measured by the earth pressure gauge, the steel bar stress CF measured by the steel bar meter, and the secondary lining strain SD measured by the embedded strain gauge. The tunnel bottom deformation and vibration data include: the longitudinal settlement data LS1 measured by the static level, and multiple of the vibration acceleration VA and vibration mode VM measured by the vibration sensor. The deformation joint displacement data may include: the three-dimensional displacement TD of the tunnel deformation joint measured by the laser displacement meter. The dislocation deformation data of the tunnel structure may include: the longitudinal dislocation deformation (longitudinal settlement) LS2 of the tunnel structure measured by the wall shear stress WSS flexible monitoring unit, the lateral dislocation deformation TS measured by the laser ranging sensor support, and the tunnel vault settlement VS. The structural deformation data of the tunnel lining include: the lateral structural deformation HC of the tunnel lining measured by the laser ranging sensor support, etc. The tunnel surface deformation data may include: the tunnel surface strain SS measured by the speckle image strain measurement system DIC. The tunnel internal damage data includes at least one of the infrared radiation energy RE measured by the infrared thermal imager, the acoustic emission energy AE measured by the acoustic emission system, and the acoustic emission waveform AW measured by the acoustic emission system. The second dimension data includes the tunnel internal damage data When the tunnel internal damage data, the internal damage data may include the infrared radiation energy RE measured by the infrared thermal imager.

[0077] In some embodiments, before acquiring monitoring data of multiple dimensions of the tunnel, the optimal deployment position of each sensor may be determined first, and each sensor may be deployed at the corresponding optimal deployment position for monitoring, and the monitoring data may be recorded.

[0078] For example, the optimal placement position of each sensor can be determined in the following manner: numerical simulation of the tunnel is performed to obtain a tunnel model corresponding to the tunnel; based on the tunnel model, the longitudinal deformation law of the tunnel structure under different earthquake accelerations is obtained, and based on the longitudinal deformation law of the tunnel structure, the optimal placement position corresponding to each sensor is determined. Furthermore, each tactile sensor, visual sensor, and auditory sensor can be placed at the corresponding optimal placement position, so that the tunnel can be monitored using the optimal placement position as a monitoring point.

[0079] Among them, numerical simulation is a way to establish a tunnel model corresponding to the tunnel, and the tunnel model is a model established to simulate the actual situation of the tunnel. Figure 3 As shown, Figure 3 A schematic diagram of a tunnel model provided for an embodiment of the present application.

[0080] Specifically, relevant data required for establishing the tunnel model are obtained, such as field survey data, tunnel literature data, etc. The relevant data can be processed based on simulation software in related technologies to obtain the tunnel model corresponding to the tunnel. Based on the tunnel model, the deformation of the tunnel structure under different earthquake accelerations is analyzed to obtain the longitudinal deformation law of the tunnel structure, and the optimal layout position of each sensor is determined based on information entropy theory and cost-effectiveness.

[0081] In some embodiments, by reading the sensor data deployed at each of the optimal layout positions, the force data of the tunnel, the tunnel structure deformation data, the surface deformation of the tunnel, and the internal damage data of the tunnel are obtained as monitoring data of multiple dimensions of the tunnel.

[0082] Specifically, the secondary lining force LF measured by the earth pressure gauge, the steel bar force CF measured by the steel bar meter, the secondary lining strain SD measured by the embedded strain gauge, the longitudinal settlement data LS1 measured by the static level, the vibration acceleration VA and vibration mode VM measured by the vibration sensor, the three-dimensional displacement TD of the tunnel deformation joint measured by the laser displacement meter, the longitudinal dislocation deformation (longitudinal settlement) LS2 of the tunnel structure measured by the WSS flexible monitoring unit, the lateral dislocation deformation TS measured by the laser ranging sensor support, the lateral structure deformation HC of the tunnel lining measured by the laser ranging sensor support, the tunnel surface strain SS measured by the speckle image strain measurement system DIC, the infrared radiation energy RE measured by the infrared thermal imager, the acoustic emission energy AE measured by the acoustic emission system, the acoustic emission waveform AW measured by the acoustic emission system, etc. are used as monitoring data of multiple dimensions of the tunnel.

[0083] Exemplarily, refer to the following Table 1 for the optimal placement of each sensor.

[0084] Table 1

[0085]

[0086] In the embodiment of the present application, an inertial laser sensing system is used to monitor the deformation of the tunnel caused by fault creep, sudden dislocation and vibration. The sensing system can not only accurately measure the distance, but also measure the posture of the system itself. Arranged at the waist position of the tunnel section, it can monitor tunnel deformations such as tunnel convergence, arch settlement, and tunnel tilt, and realize the monitoring of lateral structural deformation and dislocation of the lining. By setting monitoring points at the optimal layout position, the stress state changes of the lining structure caused by possible fault creep, sudden dislocation and earthquake vibration are monitored, the internal force state of the lining structure in the active fracture and near-field area can be mastered, and the safety performance of the lining structure can be evaluated. The stress monitoring items of the active fracture tunnel lining mainly include the contact pressure between the primary support and the secondary lining, the stress of the secondary lining steel bars, and the strain of the secondary lining concrete; the earth pressure box is arranged and the embedded strain gauge is arranged between the primary lining and the secondary lining of the tunnel, and the steel bar gauge is arranged in the steel bars of the secondary lining of the tunnel, realizing the stress monitoring of the active fracture tunnel lining. Deformation monitoring uses a differential pressure static level. The hydraulic static level is an important bottom monitoring sensor in the engineering settlement monitoring system. The static leveling system measures the relative liquid level change of the liquid level settlement between two or more points to monitor the vibration state of the tunnel bottom, analyze and evaluate the deformation and stress state of the bottom structure caused by the fault fracture zone, and objectively evaluate whether the structure is damaged or the degree and hazard of the bottom deformation, obtain the impact of the earthquake on the structure, and ensure the safety of structural operation. The vibration monitoring team must use only vibration sensors. By installing laser rangefinders and laser displacement meters at the tunnel deformation joint position, through the three-dimensional deformation monitoring of the combined deformation joint caused by possible fault creep, sudden dislocation and vibration, the anti-shock absorption effect of the large-rigidity lining ring combined deformation joint that crosses the active fracture is verified, and the three-dimensional displacement monitoring of the deformation joint is realized. The installation positions of the above sensors in the tunnel can be combined with Figure 4A shown.

[0087] The infrared thermal imager and speckle image strain measurement system DIC are installed at the tunnel waist to measure the damage status of the tunnel structure in real time. The acoustic emission probe (the probe of the acoustic emission system) is installed at the waist of the tunnel on both sides to monitor the tunnel lining damage signal in real time. Figure 4B shown.

[0088] The inertial measurement WSS measurement system is installed at the tunnel waist to observe the settlement areas on both sides of the tunnel and obtain the longitudinal dislocation deformation of the tunnel structure. Figure 4C shown.

[0089] By installing each sensor at the optimal layout position, the corresponding monitoring data can be accurately obtained.

[0090] In some embodiments, numerical simulation is used to obtain a tunnel model corresponding to the tunnel, which can be specifically implemented through the following process: obtaining the design documents of the tunnel, the actual engineering geological data of the tunnel, the actual hydrogeological data of the tunnel, and the surrounding rock mechanical parameters of the tunnel; performing numerical simulation based on the design documents, the actual engineering geological data, the actual hydrogeological data, and the surrounding rock mechanical parameters to obtain the tunnel model corresponding to the tunnel.

[0091] Specifically, by extracting data required for numerical simulation from design documents, actual engineering geological data, actual hydrogeological data, and surrounding rock mechanical parameters, the extracted data is processed based on modeling methods, software, platforms, etc. in related technologies to achieve refined numerical simulation of engineering geological conditions, actual hydrogeological conditions, and actual surrounding rock mechanical parameters, and obtain a tunnel model. The embodiments of the present application do not limit the method for obtaining design documents, actual engineering geological data, actual hydrogeological data, and surrounding rock mechanical parameters.

[0092] After monitoring and obtaining monitoring data of multiple dimensions, the monitoring data of multiple dimensions obtained by each sensor can be sent to the processing module through the transmission module, wherein the transmission module is mainly composed of wired and wireless networks, specifically including optical fiber, 4G, 5G, WIFI, Mesh ad hoc network, Lora ad hoc network, etc. A 4G wireless gateway is arranged outside the tunnel entrance, and an edge computing gateway is arranged inside the tunnel. The edge computing gateway is connected to the 4G wireless gateway at the entrance through optical fiber, and the edge computing gateway is connected to each sensor through optical fiber or ad hoc network. For example, vibrating string earth pressure gauge, steel bar meter, vibrating string embedded strain gauge, static level, acoustic emission remote unattended monitoring system, speckle image strain measurement system DIC, infrared thermal imager are connected to the edge computing gateway in the tunnel through optical fiber, and laser displacement meter, WSS flexible monitoring unit, omnidirectional inclination laser ranging sensor fulcrum, and intelligent vibration sensor are connected to the edge computing gateway in the tunnel through Mesh ad hoc network. Therefore, each sensor can send the monitoring data obtained by monitoring to the edge computing gateway, which is then sent to the 4G wireless gateway through the edge computing gateway, and then transmitted to the processing module for processing. The processing module is mainly composed of an edge calculator.

[0093] S22. Determine the limit thresholds of the tunnel damage level intervals to which the first dimensional data, the second dimensional data, and the third dimensional data respectively belong.

[0094] Among them, the tunnel damage level interval is an interval divided to represent different degrees of tunnel damage. In the embodiment of the present application, the limit threshold of each tunnel damage level interval is represented by the ratio of the interval threshold of the tunnel damage level interval to the corresponding maximum damage value, and the maximum damage value is the data value that causes tunnel damage. For example, the tunnel damage level interval can be divided into five tunnel damage level intervals, namely D1, D2, D3, D4, and D5, wherein D1 represents health, D2 represents slight damage, D3 represents moderate damage, D4 ​​represents severe damage, and D5 represents damage. In this case, the maximum value of the D5 interval is the maximum damage value. For the limit threshold of interval D1, taking the stress data and dislocation deformation data of the tunnel included in the first dimension data as an example, the maximum value of the stress data corresponding to the D1 interval is M, and the maximum value (maximum damage value) of the stress data corresponding to the D5 interval is N, then the limit threshold of the stress data of the interval D1 is M / N; the maximum value of the dislocation deformation data corresponding to the D1 interval is O, and the maximum value (maximum damage value) of the dislocation deformation data corresponding to the D5 interval is P, then the limit threshold of the interval D1 is O / P. Exemplarily, for each monitoring data in three dimensions, the corresponding tunnel damage level interval and the limit threshold of the tunnel damage level interval can be referred to as shown in Table 2 below.

[0095] Table 2

[0096]

[0097] The limit threshold of tunnel damage level interval D1 is 0.2, the limit threshold of tunnel damage level interval D2 is 0.4, the limit threshold of tunnel damage level interval D3 is 0.6, the limit threshold of tunnel damage level interval D4 is 0.9, and the limit threshold of tunnel damage level interval D5 is 1. The threshold of each tunnel damage level interval can be obtained through refined simulation or indoor test.

[0098] Specifically, the ratio of each monitoring data to the corresponding maximum damage value is calculated, the tunnel damage level interval to which the ratio belongs is determined, and the maximum value of the tunnel damage level interval is determined as the limit threshold of the tunnel damage level interval to which the monitoring data belongs. For example, for the tunnel surface deformation data of the second dimension monitoring data, the tunnel surface strain SS measured by the speckle image strain measurement system DIC is read, and the ratio of the tunnel surface strain SS to the tunnel surface strain that causes tunnel damage is calculated to determine the tunnel damage level interval to which the ratio belongs. If the tunnel damage level interval to which the ratio belongs is D1, the limit threshold of the tunnel damage level interval to which it belongs is 0.2; if the tunnel damage level interval to which the ratio belongs is D3, the limit threshold of the tunnel damage level interval to which it belongs is 0.6. Examples are not given one by one here.

[0099] In the embodiments of the present application, a detailed numerical simulation of the actual tunnel structure is performed, and the stress characteristics and deformation laws of the tunnel under different earthquake accelerations are obtained by experimental means to obtain the relevant threshold value of the tunnel structure failure.

[0100] S23, assigning corresponding weights to the determined multiple limit thresholds respectively, and summing the multiple limit thresholds based on the weights to obtain a safety status index of the tunnel.

[0101] For example, a weight is assigned to the limit threshold corresponding to the measured second lining stress LF, b weight is assigned to the limit threshold corresponding to the steel bar stress CF, c weight is assigned to the limit threshold corresponding to the second lining strain SD, d weight is assigned to the limit threshold corresponding to the longitudinal settlement data LS1, e weight is assigned to the limit threshold corresponding to the vibration acceleration VA, f weight is assigned to the limit threshold corresponding to the vibration mode VM, g weight is assigned to the limit threshold corresponding to the three-dimensional displacement TD of the tunnel deformation joint, h weight is assigned to the limit threshold corresponding to the longitudinal dislocation deformation (longitudinal settlement) LS2 of the tunnel structure, i weight is assigned to the limit threshold corresponding to the transverse dislocation deformation TS, j weight is assigned to the limit threshold corresponding to the transverse structure deformation HC of the tunnel lining, k weight is assigned to the limit threshold corresponding to the vault settlement VS, l weight is assigned to the limit threshold corresponding to the acoustic emission count AC, m weight is assigned to the limit threshold corresponding to the acoustic emission energy AE, o weight is assigned to the limit threshold corresponding to the tunnel surface strain SS, and p weight is assigned to the limit threshold corresponding to the infrared radiation energy RE. The weight value is also an importance coefficient, which can be determined according to standards, specifications and simulation results, and the sum is 1. The safety status index of the tunnel can be calculated by the following formula.

[0102] H=(aLF+bCF+cSD+dLS1+eVA+fVM+gTD+hLS2

[0103] +iTS+jHC+kVS+lAC+mAE+oSS+pRE)×100

[0104] In some embodiments, before calculating the safety status index based on the above formula, it also includes: determining whether the third dimensional data contains a lining damage waveform; if so, determining that the tunnel is in the highest level of unsafe state, which is a damaged state; if not, calculating the safety status index of the tunnel based on the above formula.

[0105] S24: Determine whether the tunnel is in a safe state based on the safety state index of the tunnel.

[0106] The safety status of the tunnel includes: healthy status, slightly damaged status, moderately damaged status, severely damaged status, and destroyed status.

[0107] Specifically, a state score interval in which the security state index is located is determined, and the security state of the tunnel is determined according to the state score interval in which the security state index is located.

[0108] Exemplarily, if the safety status index is less than or equal to 20, the safety status of the tunnel is determined to be destroyed; if the safety status index is greater than 20 and less than or equal to 40, the safety status of the tunnel is determined to be a severely damaged state; if the safety status index is greater than 40 and less than or equal to 60, the safety status of the tunnel is determined to be a moderately damaged state; if the safety status index is greater than 60 and less than or equal to 90, the safety status of the tunnel is determined to be a slightly damaged state; if the safety status index is greater than 90, the safety status of the tunnel is determined to be a healthy state.

[0109] The embodiment of the present application provides a holographic perception method for the dynamic response of a railway tunnel passing through an active fault zone. By using holographic perception sensors such as tactile sensors, visual sensors, and auditory sensors to monitor the tunnel from multiple dimensions, multi-dimensional holographic perception monitoring data is obtained. The multi-dimensional holographic perception monitoring data can reflect the actual situation of the tunnel from multiple angles. Therefore, combining the monitoring data of multiple dimensions can accurately determine whether the tunnel is in a safe state.

[0110] Based on any of the above embodiments, it also includes a process of adjusting the monitoring frequency of each sensor.

[0111] Exemplarily, when it is determined that no earthquake has occurred, the tactile sensor, the visual sensor, and the auditory sensor are controlled to collect data at a first frequency; when it is determined that an earthquake has occurred, the tactile sensor, the visual sensor, and the auditory sensor are controlled to collect data at a second frequency, and the second frequency is greater than the first frequency.

[0112] Specifically, the monitoring data of the vibration sensor is used to determine whether an earthquake has occurred. When it is determined that no earthquake has occurred, the collection frequency of the vibrating-wire earth pressure gauge, steel bar meter, vibrating-wire embedded strain gauge, static level, laser displacement meter, WSS flexible monitoring unit, and omnidirectional tilt laser ranging sensor support is 1 time / h. The intelligent vibration sensor, acoustic emission remote unattended monitoring system, speckle image strain measurement system DIC, and infrared thermal imager always maintain real-time monitoring status. The collection frequency of the intelligent vibration sensor is 20Hz, the monitoring frequency of the acoustic emission remote unattended monitoring system is 2MHz, and the speckle image strain measurement system DIC and infrared thermal imager are 20FPS. When it is determined that an earthquake has occurred, the vibration sensor transmits a signal to the edge computer, and the edge computer immediately sends a signal to activate, so that the vibrating-wire earth pressure gauge, steel bar meter, vibrating-wire embedded strain gauge, static level, laser displacement meter, WSS flexible monitoring unit, and omnidirectional tilt laser ranging sensor support collect data. At this time, the collection frequency becomes 2 times / min. This ensures the accuracy of determining the safety status of the tunnel.

[0113] In the embodiment of the present application, each section of the tunnel is monitored by using the above method to determine the safety status of the tunnel. After determining the safety status of the tunnel, corresponding prompt information can be determined according to the safety status of the tunnel; the prompt information is sent to the mobile terminal device, so that the user can understand the safety status of the tunnel in time and make emergency plans.

[0114] Based on the same inventive concept, as an implementation of the above method, the embodiment of the present application also provides a dynamic response holographic perception system for a railway tunnel crossing an active fault zone provided by the above embodiment. The system embodiment corresponds to the above method embodiment. For ease of reading, the system embodiment will no longer repeat the details of the above method embodiment one by one, but it should be clear that the dynamic response holographic perception system for a railway tunnel crossing an active fault zone in this embodiment can correspond to all the contents of the above method embodiment.

[0115] For example, Figure 5 The schematic diagram of the structure of the dynamic response holographic perception system of the railway tunnel passing through the active fault zone provided in the embodiment of the present application is as follows: Figure 5 As shown, the dynamic response holographic perception system for a railway tunnel crossing an active fault zone provided in this embodiment may include: a perception module, a transmission module, a processing module, and a management module. Among them, the perception module is composed of a holographic perception sensor and is used to monitor data. The transmission module transmits the monitoring data to the processing module for processing. The management module is used to manage the tunnel health status information, including viewing, changing, and deleting previous monitoring data. The active tunnel structure can also push alarm information to the reported mobile terminal device when slight damage or above occurs; push alarm information to the reported mobile terminal device when slight damage or above occurs.

[0116] The processing module in the dynamic response holographic perception system of a railway tunnel crossing an active fault zone includes: an acquisition unit, which is used to acquire monitoring data of multiple dimensions of the tunnel, wherein the monitoring data of the multiple dimensions include: first dimensional data obtained based on monitoring by a tactile sensor, second dimensional data obtained based on monitoring by a visual sensor, and third dimensional data obtained based on monitoring by an auditory sensor, wherein the first dimensional data is used to characterize the stress condition of the tunnel and the deformation of the tunnel structure, the second dimensional data is used to characterize the surface deformation of the tunnel, and the third dimensional data is used to characterize the internal damage of the tunnel;

[0117] A determination unit, used to determine the limit thresholds of the tunnel damage level intervals to which the first dimensional data, the second dimensional data, and the third dimensional data respectively belong;

[0118] A calculation unit, configured to assign corresponding weights to the determined multiple limit thresholds respectively, and sum the multiple limit thresholds based on the weights to obtain a safety status index of the tunnel;

[0119] A judging unit is used to determine whether the tunnel is in a safe state based on the safety state index of the tunnel.

[0120] In some embodiments, the processing module further includes:

[0121] A numerical simulation unit is used to perform numerical simulation on the tunnel to obtain a tunnel model corresponding to the tunnel; based on the tunnel model, the longitudinal deformation law of the tunnel structure of the tunnel under different seismic accelerations is obtained, and based on the longitudinal deformation law of the tunnel structure, the optimal layout positions corresponding to each sensor are determined.

[0122] In some embodiments, the numerical simulation unit is specifically used to obtain the design documents of the tunnel, the actual engineering geological data of the tunnel, the actual hydrogeological data of the tunnel, and the surrounding rock mechanical parameters of the tunnel; and perform numerical simulation based on the design documents, the actual engineering geological data, the actual hydrogeological data, and the surrounding rock mechanical parameters to obtain a tunnel model corresponding to the tunnel.

[0123] In some embodiments, the acquisition unit is specifically used to obtain the force data of the tunnel, the tunnel structure deformation data, the surface deformation of the tunnel, and the internal damage data of the tunnel by reading the sensor data deployed at each of the optimal layout positions, as monitoring data of multiple dimensions of the tunnel.

[0124] In some embodiments, the tactile sensor includes: an earth pressure gauge, a steel bar gauge, an embedded strain gauge, a static level, a vibration sensor, a laser displacement meter, a WSS flexible monitoring unit, and a plurality of laser ranging sensor fulcrums; the visual sensor includes: a speckle image strain measurement system and / or an infrared thermal imager; the auditory sensor includes: an acoustic emission system; the first dimensional data includes: a plurality of data including: the force data of the tunnel, the deformation and vibration data of the tunnel bottom, the displacement data of the deformation joint, the dislocation deformation data of the tunnel structure, and the structural deformation data of the tunnel lining; the second dimensional data includes: tunnel surface deformation data and / or tunnel internal damage data; the third dimensional data includes: tunnel internal damage data.

[0125] In some embodiments, the judgment unit is further used to judge whether the third dimensional data contains a lining damage waveform; if so, it is determined that the tunnel is in the highest level of unsafe state.

[0126] In some embodiments, the processing module further includes:

[0127] A control unit is used to control the tactile sensor, the visual sensor, and the auditory sensor to collect data at a first frequency when it is determined that no earthquake has occurred; and to control the tactile sensor, the visual sensor, and the auditory sensor to collect data at a second frequency when it is determined that an earthquake has occurred, wherein the second frequency is greater than the first frequency.

[0128] In some embodiments, the safety status of the tunnel includes: healthy status, slightly damaged status, moderately damaged status, severely damaged status, and destroyed status; the management module is used to send the prompt information to the mobile terminal device.

[0129] The dynamic response holographic perception system for a railway tunnel crossing an active fault zone provided in this embodiment can execute the dynamic response holographic perception method for a railway tunnel crossing an active fault zone provided in the above method embodiment. Its implementation principle and technical effect are similar and will not be repeated here. Each module in the above-mentioned dynamic response holographic perception system for a railway tunnel crossing an active fault zone can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0130] In one embodiment, an electronic device is provided, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of any one of the methods for holographic perception of dynamic response of a railway tunnel passing through an active fault zone described in the above method embodiments are implemented.

[0131] For example, Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 6 As shown, the electronic device provided in this embodiment includes: a memory 61 and a processor 62, the memory 61 is used to store computer programs; the processor 62 is used to execute the steps of the holographic perception method of the dynamic response of a railway tunnel crossing an active fault zone provided in the above method embodiment when calling the computer program, and its implementation principle and technical effect are similar, which will not be repeated here. Those skilled in the art can understand that Figure 6 The structure shown in the figure is merely a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the electronic device to which the scheme of the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0132] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of any one of the methods for holographic perception of dynamic response of a railway tunnel passing through an active fault zone described in the above method embodiments are implemented.

[0133] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in various forms, such as static random access memory (SRAM) and dynamic random access memory (DRAM).

[0134] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0135] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A holographic perception method for dynamic response of a railway tunnel passing through an active fault zone, characterized in that: include: Acquire monitoring data of multiple dimensions of the tunnel, wherein the monitoring data of the multiple dimensions include: first dimensional data obtained based on monitoring by a tactile sensor, second dimensional data obtained based on monitoring by a visual sensor, and third dimensional data obtained based on monitoring by an auditory sensor, wherein the first dimensional data is used to characterize the stress condition and deformation of the tunnel structure, the second dimensional data is used to characterize the surface deformation of the tunnel, and the third dimensional data is used to characterize the internal damage of the tunnel; Determine the limit thresholds of the tunnel damage level intervals to which the first dimensional data, the second dimensional data, and the third dimensional data respectively belong; Assigning corresponding weights to the determined multiple limit thresholds respectively, and summing and calculating the multiple limit thresholds based on the weights to obtain a safety status index of the tunnel; It is determined whether the tunnel is in a safe state based on the safety state index of the tunnel.

2. The method according to claim 1, characterized in that Before acquiring the monitoring data of multiple dimensions of the tunnel, the method further includes: Performing numerical simulation on the tunnel to obtain a tunnel model corresponding to the tunnel; Based on the tunnel model, the longitudinal deformation law of the tunnel structure of the tunnel under different seismic accelerations is obtained, and based on the longitudinal deformation law of the tunnel structure, the optimal layout positions corresponding to each sensor are determined.

3. The method according to claim 2, characterized in that The performing numerical simulation on the tunnel to obtain a tunnel model corresponding to the tunnel includes: Acquiring design documents of the tunnel, actual engineering geological data of the tunnel, actual hydrogeological data of the tunnel, and mechanical parameters of surrounding rocks of the tunnel; A numerical simulation is performed based on the design document, the actual engineering geological data, the actual hydrogeological data, and the surrounding rock mechanical parameters to obtain a tunnel model corresponding to the tunnel.

4. The method according to claim 2, characterized in that: The obtaining of monitoring data of multiple dimensions of the tunnel includes: By reading the sensor data deployed at each of the optimal layout positions, the force data of the tunnel, the tunnel structure deformation data, the surface deformation of the tunnel, and the internal damage data of the tunnel are obtained as monitoring data of multiple dimensions of the tunnel.

5. The method according to claim 1, characterized in that The tactile sensor includes: soil pressure gauge, steel bar gauge, embedded strain gauge, static level, vibration sensor, laser displacement meter, WSS flexible monitoring unit, and multiple laser range sensing fulcrums; the visual sensor includes: speckle image strain measurement system and / or infrared thermal imager; the auditory sensor includes: acoustic emission system; The first dimensional data includes: multiple data of the tunnel stress data, tunnel bottom deformation and vibration data, deformation joint displacement data, dislocation deformation data of the tunnel structure, and structural deformation data of the tunnel lining; the second dimensional data includes: tunnel surface deformation data and / or tunnel internal damage data; the third dimensional data includes: tunnel internal damage data.

6. The method according to claim 1, characterized in that Before respectively assigning corresponding weights to the determined multiple limit thresholds and summing the multiple limit thresholds based on the weights to obtain the safety status index of the tunnel, the method further includes: determining whether the third dimensional data includes a lining damage waveform; If so, it is determined that the tunnel is in the highest level of unsafe state.

7. The method according to any one of claims 1 to 6, characterized in that: The method further comprises: When it is determined that no earthquake has occurred, controlling the tactile sensor, the visual sensor, and the auditory sensor to collect data at a first frequency; When it is determined that an earthquake occurs, the tactile sensor, the visual sensor, and the auditory sensor are controlled to collect data at a second frequency, where the second frequency is greater than the first frequency.

8. The method according to any one of claims 1 to 6, characterized in that: The safety status of the tunnel includes: healthy status, slightly damaged status, moderately damaged status, severely damaged status, and destroyed status; After determining the security status of the tunnel, determining corresponding prompt information according to the security status of the tunnel; The prompt information is sent to the mobile device.

9. A dynamic response holographic perception system for a railway tunnel passing through an active fault zone, characterized in that: include: Processing module; The processing module comprises: an acquisition unit, configured to acquire monitoring data of multiple dimensions of the tunnel, wherein the monitoring data of the multiple dimensions include: first dimensional data obtained based on monitoring by a tactile sensor, second dimensional data obtained based on monitoring by a visual sensor, and third dimensional data obtained based on monitoring by an auditory sensor, wherein the first dimensional data is used to characterize the stress condition of the tunnel and the deformation of the tunnel structure, the second dimensional data is used to characterize the surface deformation of the tunnel, and the third dimensional data is used to characterize the internal damage of the tunnel; A determination unit, used to determine the limit thresholds of the tunnel damage level intervals to which the first dimensional data, the second dimensional data, and the third dimensional data respectively belong; A calculation unit, configured to assign corresponding weights to the determined multiple limit thresholds respectively, and sum the multiple limit thresholds based on the weights to obtain a safety status index of the tunnel; A judging unit is used to determine whether the tunnel is in a safe state based on the safety state index of the tunnel.

10. An electronic device, characterized in that: include: processor; A memory for storing executable instructions; Wherein, the processor is used to read the executable instructions from the memory and execute the executable instructions to implement the dynamic response holographic perception method of a railway tunnel passing through an active fault zone as described in any one of claims 1 to 8.

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