Tunnel construction environment detection system and method

Abstract

The invention discloses a tunnel construction environment detection system and method, and relates to the technical field of tunnel construction environment detection, and the system comprises a tunnel terrain analysis module, an underground water environment monitoring module, a construction stability evaluation module, and a construction environment optimization module. The tunnel construction environment detection system calculates a comprehensive deformation risk index of each environment detection area by collecting and analyzing stratum deformation information of different areas in a tunnel, further evaluates a potential deformation area, evaluates a water inrush risk by monitoring underground water pressure change, and combines the deformation risk index and a water inrush risk quantized value to obtain a tunnel construction environment detection result. The construction stability index of each area is calculated, finally, according to the construction stability index, the construction environment stability of each potential deformation area is evaluated, optimization urgency is determined, corresponding measures are taken for construction environment optimization, comprehensive detection and dynamic evaluation of the tunnel construction environment are achieved, and construction safety and efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction environment detection, and particularly relates to a tunnel construction environment detection system and method. Background Technique

[0002] In the field of tunnel construction, with the expansion of the construction scale and the increasing complexity of geological conditions, traditional monitoring means are difficult to meet the requirements. In order to accurately evaluate potential deformation areas, effectively respond to water inrush problems, and comprehensively grasp the stability of the construction environment, a tunnel construction environment monitoring and detection system based on detailed calculations and evaluation indicators has emerged.

[0003] The prior art, such as the invention patent application with the publication number CN118966797A, discloses a tunnel construction environment monitoring and early warning method and system, belonging to the field of data monitoring and analysis. The method includes constructing a geological risk database according to exploration data, arranging corresponding sensors in different areas to form sensor monitoring nodes, integrating the nodes to form an environmental monitoring node cluster, sending the data to a data processing center, the data processing center decompresses the received data, performs standardization processing on the decompressed data, constructs an environmental database, and at the same time fits the data to obtain a tunnel risk characterization parameter model, uses it as an input sample, inputs the convolutional network to extract feature data, combines the data in the environmental database, performs real-time risk identification on the construction environment, finally obtains the probability of the occurrence of the risk of the risk characterization parameter model, and issues an early warning according to the probability of the occurrence of the risk.

[0004] For the above solution, there are at least the following technical problems: 1. The above solution lacks a detailed division of the areas inside the tunnel and the collection and analysis of formation deformation information, which will lead to the inability to accurately evaluate each potential deformation area inside the tunnel. In tunnel construction, the assessment of potential deformation risks in different areas is crucial. However, the above solution does not divide the areas inside the tunnel into each environmental detection area, making it difficult to accurately judge which areas are prone to deformation when facing complex geological conditions, thus unable to take effective preventive measures in advance, increasing the safety hazards caused by deformation during the construction process.

[0005] 2. The above solution lacks an assessment of the water inrush risk of the groundwater environment inside the tunnel. The construction party cannot know the water inrush risk in advance. Once water inrush occurs, it will seriously affect the safety of personnel and the progress of the project. In addition, it lacks the calculation of the construction stability index and the assessment of the construction environment stability, making it difficult to comprehensively understand the construction environment stability. The construction party cannot master the stability state and cannot adjust the construction plan targeted, affecting the project progress and quality.

[0006] 3. The above solution lacks detailed calculation processes and standards for various evaluation indicators, which will lead to a lack of operability in practical applications. The above solution only briefly mentions constructing a risk characterization parameter model, conducting risk identification and early warning, lacking specific quantitative indicators and calculation methods, making it difficult for construction workers to accurately judge risks and take corresponding measures when actually applying the tunnel construction environment monitoring method and system. Summary of the Invention

[0007] The purpose of the present invention is to provide a tunnel construction environment detection system and method, which solves the problems existing in the background technology.

[0008] To solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides a tunnel construction environment detection system, including: a tunnel terrain analysis module, which is used to divide the area within a specified tunnel into each environmental monitoring area, collect the formation deformation information of each environmental monitoring area, and then calculate the comprehensive deformation risk index of each environmental monitoring area, so as to evaluate each potential deformation area within the specified tunnel.

[0009] A groundwater environment monitoring module, which is used to evaluate the water inrush risk of the groundwater corresponding to each potential deformation area by monitoring the change in groundwater pressure corresponding to each potential deformation area according to each potential deformation area within the specified tunnel.

[0010] A construction stability evaluation module, which is used to calculate the construction stability index of each potential deformation area according to the comprehensive deformation risk index of each environmental monitoring area and the water inrush risk of the groundwater corresponding to each potential deformation area.

[0011] A construction environment optimization module, which is used to evaluate the stability of the construction environment corresponding to each potential deformation area within the specified tunnel according to the construction stability index of each potential deformation area.

[0012] The present invention provides a tunnel construction environment detection method in the second aspect, including: Step 1. Tunnel terrain analysis: Divide the area within a specified tunnel into each environmental monitoring area, collect the formation deformation information of each environmental monitoring area, and then calculate the comprehensive deformation risk index of each environmental monitoring area, so as to evaluate each potential deformation area within the specified tunnel.

[0013] Step 2. Groundwater environment monitoring: According to each potential deformation area corresponding within the specified tunnel, evaluate the water inrush risk of the groundwater corresponding to each potential deformation area by monitoring the change in groundwater pressure corresponding to each potential deformation area.

[0014] Step 3. Construction stability evaluation: Calculate the construction stability index of each potential deformation area according to the comprehensive deformation risk index of each environmental monitoring area and the water inrush risk of the groundwater corresponding to each potential deformation area.

[0015] Step 4. Optimization of construction environment: Based on the construction stability indices of each potential deformation area, evaluate the stability of the construction environment corresponding to each potential deformation area in the specified tunnel.

[0016] The beneficial effects of the present invention are as follows: 1. A tunnel construction environment detection system and method provided by an embodiment of the present invention, during the tunnel terrain analysis process, by dividing the areas within the specified tunnel into each environment detection area and collecting the formation deformation information of each environment detection area, it is beneficial to accurately evaluate the geological stability of different positions of the tunnel and provide accurate basic data for subsequent construction stability analysis. During the evaluation of the formation deformation of the environment detection area, by detecting the displacement of the tunnel surrounding rock, the stress suffered by the surrounding rock during construction, and the shear stress between the surrounding rock and the support structure, it is beneficial to comprehensively reflect the change of the stress of the surrounding rock during construction, ensure the comprehensive monitoring of deformation risks, and reduce the occurrence probability of sudden geological disasters.

[0017] 2. During the process of processing the formation deformation information in an embodiment of the present invention, by setting sensor device installation points in each environment detection area, using sensors to collect data, and obtaining the formation deformation information of each environment detection area through mean calculation, it is beneficial to reduce the error of single-point monitoring data, improve the accuracy of monitoring data, and make the subsequent calculation of the deformation risk index more valuable for reference. During the calculation of the allowable maximum displacement and the allowable maximum stress, by measuring the elastic modulus of the rock and soil, the stress-bearing cross-sectional area, the maximum anti-shear stress, and the stress-bearing length of the support structure, it is beneficial to accurately evaluate the geological bearing capacity of each area, ensure that the deformation risk analysis of different areas can be quantitatively calculated in combination with the actual geological conditions, and improve the rationality of risk assessment.

[0018] 3. During the calculation of the comprehensive deformation risk index in an embodiment of the present invention, by combining factors such as the displacement of the surrounding rock, the stress of the surrounding rock, and the shear stress, and using a formula to calculate the comprehensive deformation risk index of each environment detection area, it is beneficial to scientifically quantify the deformation risk levels of different areas and provide accurate data support for subsequent construction stability assessment. During the monitoring of the water inrush risk, by using flow sensors and groundwater pressure sensors to real-time monitor the water flow velocity and water pressure of each potential deformation area, and calculating the water pressure volatility and water flow acceleration, it is beneficial to real-time grasp the dynamic change of groundwater, timely warn of possible water inrush risks, and improve construction safety.

[0019] 4. During the calculation of the construction stability index in an embodiment of the present invention, by combining the comprehensive deformation risk index and the water inrush risk quantification value, and introducing the influence factor of construction time, it is beneficial to comprehensively evaluate the construction environment stability of different areas, ensure that the construction stability assessment not only considers the current risks, but also makes dynamic adjustments in combination with the change of construction time, and improve the scientificity of construction safety management.

[0020] 5. In the process of optimizing and evaluating the construction environment in the embodiments of the present invention, by dividing high, medium, and low stability regions and determining the emergency state of construction environment optimization in combination with the risk level, it is beneficial to accurately identify the construction areas that need to be optimized first, making construction management more efficient and accurate, and improving the safety and construction efficiency during the construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of the system structure connection of the present invention.

[0023] Figure 2 It is a schematic diagram of the implementation steps flow of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0025] Please refer to Figure 1 As shown, the present invention provides a tunnel construction environment detection system, which includes: a tunnel terrain analysis module, a groundwater environment monitoring module, a construction stability evaluation module, a construction environment optimization module, and a database.

[0026] The tunnel terrain analysis module is respectively connected to the groundwater environment monitoring module, the construction environment optimization module, and the database. The groundwater environment monitoring module is connected to the construction stability evaluation module, and the construction stability evaluation module is connected to the construction environment optimization module.

[0027] The tunnel terrain analysis module is used to divide the areas within a specified tunnel into various environmental monitoring areas, collect the formation deformation information of each environmental monitoring area, and then calculate the comprehensive deformation risk index of each environmental monitoring area to evaluate each potential deformation area within the specified tunnel.

[0028] In a specific embodiment, the process of collecting the formation deformation information of each environmental monitoring area is as follows: According to the excavation depth in the specified tunnel, the excavation depth in the specified tunnel is evenly divided into equal-depth segments, and each equal-depth segment corresponds to each environmental monitoring area. The formation deformation information includes the displacement of the tunnel surrounding rock, the stress suffered by the surrounding rock during construction, and the shear stress between the surrounding rock and the support structure. Sensor device installation points are set in each environmental monitoring area, and the formation deformation information corresponding to each sensor device installation point in each environmental monitoring area is detected by each sensor device. The formation deformation information corresponding to each environmental monitoring area is obtained through average calculation. The allowable maximum displacement and allowable maximum stress set according to the geological conditions are obtained from the database.

[0029] It should be noted that a sensor device installation point is set every set distance in each environmental monitoring area, such as every 5 meters or 10 meters. At the same time, according to the engineer's experience, the installation point density is increased in local areas with high predicted risks. At least 3 or more installation points are set in each environmental monitoring area. Each sensor device includes, but is not limited to, a displacement sensor, a stress sensor, and a shear stress sensor.

[0030] In a specific embodiment, the process of the allowable maximum displacement and allowable maximum stress set according to the geological conditions is as follows: The rock elastic modulus is measured by a pressure gauge at each sensor device installation point corresponding to each environmental monitoring area. The rock elastic modulus of each sensor device installation point measured is calculated by average value, and then the rock elastic modulus E of each environmental monitoring area is obtained. i According to the cross-sectional area of the tunnel under force corresponding to each sensor device installation point in each environmental monitoring area, the cross-sectional area S of each environmental monitoring area is obtained through average calculation. i Furthermore, through the calculation formula: The allowable maximum displacement of the i-th environmental monitoring area is obtained. represents the maximum shear stress of the rock corresponding to the i-th environmental monitoring area, and L i represents the length of the support structure bearing external forces corresponding to the i-th environmental monitoring area.

[0031] Through the calculation formula: The allowable maximum stress of the i-th environmental monitoring area is obtained. where SF i represents the set safety factor corresponding to the i-th environmental monitoring area.

[0032] It should be noted that the shear strength of the rock is estimated by the Mohr-Coulomb criterion, which will not be elaborated here. The process of obtaining the length of the corresponding support structure bearing external forces in each environmental monitoring area is as follows: The external force distribution of the support structure is closely related to the stress-bearing section of the tunnel. For example, first, measure the stress-bearing section area of the specified tunnel. The stress-bearing section area depends on the geometric shape of the tunnel. For example, the stress-bearing section area of a circular tunnel is calculated by the area formula of a circle. According to the type and design standard of the support structure, estimate the bearing capacity of the support structure. If the unit bearing capacity of the support structure is 0.5 megapascals and the stress-bearing section area is 50.24 square meters, the length of the support structure bearing external forces is calculated by the ratio of the area to the bearing capacity, and the obtained length is 100.48 meters.

[0033] In a specific embodiment, the process of calculating the comprehensive deformation risk index of each environmental monitoring area is as follows: Through the calculation formula: The comprehensive deformation risk index R of the i-th environmental monitoring area is obtained i , where i is the corresponding number of each environmental monitoring area, i = 1, 2,..., n, and n is the total number of corresponding environmental monitoring areas. Among them, X i , Y i , Z i respectively represent the tunnel surrounding rock displacement, the stress suffered by the surrounding rock during construction, and the shear stress between the surrounding rock and the support structure corresponding to the i-th environmental monitoring area in the specified tunnel.

[0034] It should be noted that a large surrounding rock displacement indicates that the surrounding rock is unstable, increasing the deformation risk. Excessive surrounding rock stress leads to rupture or plastic deformation, increasing the risk. A large shear stress will weaken the support structure and increase the possibility of tunnel instability. The larger the values of the three, the higher the comprehensive deformation risk index.

[0035] In a specific embodiment, the process of evaluating each potential deformation area in the specified tunnel is as follows: Divide each environmental monitoring area into each risk level according to the comprehensive deformation risk index of each environmental monitoring area. Each risk area corresponds to each standard comprehensive deformation risk index interval. If the comprehensive deformation risk index of a certain environmental monitoring area belongs to a certain standard comprehensive deformation risk index interval set, it is determined that the environmental monitoring area belongs to the risk level corresponding to the standard comprehensive deformation risk index interval, and the comprehensive deformation risk index of the environmental monitoring area is compared with the set comprehensive deformation risk index threshold. If the comprehensive deformation risk index of the environmental monitoring area is greater than the set comprehensive deformation risk index threshold, it is determined that the environmental monitoring area is a potential deformation area. In this way, each potential deformation area and the corresponding risk level in the specified tunnel are obtained. The risk levels include high risk level, medium risk level, and low risk level.

[0036] The groundwater environment monitoring module is used to evaluate the water inrush risk of the groundwater corresponding to each potential deformation area by monitoring the change of the groundwater pressure corresponding to each potential deformation area in the specified tunnel.

[0037] In a specific embodiment, the process of monitoring the change of the groundwater pressure corresponding to each potential deformation area is as follows: Set each water inrush monitoring time point, and monitor the water flow velocity and water pressure corresponding to each potential deformation area at each water inrush monitoring time point through a flow sensor and a groundwater pressure sensor. Denote the water flow velocity of each potential deformation area at each water inrush monitoring time point as j represents the number of each potential deformation area, and the value of j is a positive integer. t represents the number of each water inrush monitoring time point, t = 1, 2, ……, m, m is a positive integer, and m represents the total number of water inrush monitoring time points. Denote the maximum water flow velocity corresponding to each potential deformation area as Calculate the average water pressure of each potential deformation area by averaging the water pressure of each potential deformation area at each water inrush monitoring time point. Subtract the minimum water pressure from the maximum water pressure of each potential deformation area, and divide by the average water pressure of each potential deformation area. The result obtained is the groundwater pressure volatility P of each potential deformation area j , through the calculation formula: Obtain the average water flow acceleration a corresponding to the jth potential deformation area j , represents the water flow velocity of the jth potential deformation area at the (t - 1)th water inrush monitoring time point, and Δt represents the time interval between the tth moment and the (t - 1)th moment.

[0038] In a specific embodiment, the process of evaluating the water inrush risk of the groundwater corresponding to each potential deformation area is as follows: Through the calculation formula:

[0039] Obtain the water inrush risk quantification value R′ of the groundwater corresponding to the jth potential deformation area j , where α and β respectively represent the first adjustment coefficient and the second adjustment coefficient, and Q j represents the surrounding rock elastic change coefficient corresponding to the jth potential deformation area.

[0040] It should be noted that α is used to adjust the numerical range of the water inrush risk quantification value, and β is used to adjust the influence degree of the water flow velocity on the water inrush risk. In different tunnel projects, factors such as formation characteristics, surrounding rock strength, and groundwater pressure are different. Therefore, there are differences in the order of magnitude of the calculated water inrush risk quantification values. Therefore, α and β are introduced, and regression analysis and machine learning optimization are carried out by specifying on-site data in the tunnel or corresponding historical water inrush case data in the tunnel, and combined with expert opinions for setting, so as to obtain the specific setting values corresponding to the first adjustment coefficient and the second adjustment coefficient. By continuously monitoring the stress and stress change values of the surrounding rock during the construction process in each potential deformation area in the specified tunnel, dividing the stress on the surrounding rock by the stress change value of the surrounding rock, the result obtained is the elastic change coefficient of the surrounding rock.

[0041] In the process of processing formation deformation information in the embodiment of the present invention, by setting sensor device installation points in each environmental detection area, using sensors to collect data, and obtaining the formation deformation information of each environmental detection area through average value calculation, it is beneficial to reduce the error of single-point monitoring data, improve the accuracy of monitoring data, and make the subsequent calculation of the deformation risk index more valuable for reference. In the calculation process of the allowable maximum displacement and the allowable maximum stress, by measuring the elastic modulus of rock and soil, the stress-bearing cross-sectional area, the maximum shear stress resistance, and the stress-bearing length of the support structure, it is beneficial to accurately evaluate the geological bearing capacity of each area, ensure that the deformation risk analysis of different areas can be quantitatively calculated in combination with the actual geological conditions, and improve the rationality of risk assessment.

[0042] The construction stability evaluation module is used to calculate the construction stability index of each potential deformation area according to the comprehensive deformation risk index of each environmental monitoring area and the water inrush risk of the groundwater corresponding to each potential deformation area.

[0043] In a specific embodiment, the specific process of calculating the construction stability index of each potential deformation area is as follows: According to the comprehensive deformation risk index of each environmental monitoring area and the water inrush risk quantification value of the groundwater corresponding to each potential deformation area, the comprehensive deformation risk index corresponding to each potential deformation area is obtained, and the comprehensive deformation risk index corresponding to each potential deformation area is denoted as R j , and thus through the calculation formula: The construction stability index R″ of the jth potential deformation area is obtained j , where λ represents the set construction time influence coefficient, and T represents the construction duration from the start of the specified tunnel to the current moment.

[0044] It should be noted that the construction duration from the start of the specified tunnel to the current moment refers to the cumulative construction time experienced from the official start of the specified tunnel to the time point when the construction stability index of each potential deformation area is calculated currently, including the effective working time during all construction processes of each potential deformation area.

[0045] In the calculation process of the comprehensive deformation risk index in the embodiments of the present invention, by combining factors such as surrounding rock displacement, surrounding rock stress, shear stress, etc., and using formulas to calculate the comprehensive deformation risk index of each environmental detection area, it is beneficial to scientifically quantify the deformation risk levels of different areas and provide accurate data support for subsequent construction stability assessment. During the water inrush risk monitoring process, the water flow velocity and water pressure of each potential deformation area are monitored in real time through flow sensors and groundwater pressure sensors, and the water pressure volatility and water flow acceleration are calculated, which is beneficial to grasping the dynamic changes of groundwater in real time, warning of possible water inrush risks in a timely manner, and improving construction safety.

[0046] The construction environment optimization module is used to evaluate the stability of the construction environment corresponding to each potential deformation area in the specified tunnel according to the construction stability index of each potential deformation area.

[0047] In a specific embodiment, the process of evaluating the stability of the construction environment corresponding to each potential deformation area in the specified tunnel is as follows: Each potential deformation area in the specified tunnel is divided into a high-stability area, a medium-stability area, and a low-stability area. The high-stability area, the medium-stability area, and the low-stability area respectively correspond to a high-standard construction stability index interval, a medium-standard construction stability index interval, and a low-standard construction stability index interval. The construction stability index of each potential deformation area is compared with the high-standard construction stability index interval, the medium-standard construction stability index interval, and the low-standard construction stability index interval respectively. If the construction stability index of a certain potential deformation area belongs to the high-standard construction stability index interval, it indicates that the potential deformation area is a high-stability area. And if the risk level corresponding to the potential deformation area is a high risk level, the urgency of optimizing the construction environment corresponding to the potential deformation area is set to the first emergency state. If the risk level corresponding to the potential deformation area is a medium risk level, the urgency of optimizing the construction environment corresponding to the potential deformation area is set to the second emergency state. If the risk level corresponding to the potential deformation area is a low risk level, the urgency of optimizing the construction environment corresponding to the potential deformation area is set to the third emergency state. In this way, the stability of the construction environment corresponding to each potential deformation area and the urgency of optimizing the construction environment corresponding to each potential deformation area are evaluated.

[0048] It should be noted that if a potential deformation area is a medium-stability area and the risk level is a high-risk level, the urgency of optimizing the construction environment corresponding to the potential deformation area is set to the second emergency state. Otherwise, the urgency of optimizing the construction environment corresponding to the potential deformation area is set to the third emergency state. If a potential deformation area is a low-stability area, the urgency of optimizing the construction environment corresponding to the potential deformation area is set to the third emergency state.

[0049] It should also be noted that a potential deformation area being in the first emergency state indicates that there are serious stratum deformations, water inrush risks, or failure of the support structure in this potential deformation area. If not intervened in a timely manner, it will lead to serious accidents such as local collapse and water inrush of the tunnel. Then, the first emergency optimization strategy measures are carried out to optimize the construction environment of this potential deformation area. The first emergency optimization strategy measures include strengthening the surrounding rock by means such as using high-strength bolts, steel supports, and shotcrete, as well as suspending construction, re-evaluating risks, and adjusting the construction plan. A potential deformation area being in the second emergency state indicates that there is a high possibility of large deformation or water inrush in this potential deformation area, but it will not immediately become unstable within the predicted time period. The second emergency optimization strategy measures include, but are not limited to, increasing monitoring points and adjusting the excavation sequence. A potential deformation area being in the third emergency state indicates that this potential deformation area is relatively stable, and the risks of deformation and water inrush during the construction process are lower compared to the potential deformation areas in the first and second emergency states. The third emergency optimization strategy measures include, but are not limited to, maintaining basic monitoring, such as data updates every hour or every day.

[0050] In the calculation process of the construction stability index in the embodiments of the present invention, by combining the comprehensive deformation risk index and the water inrush risk quantification value and introducing the influence factor of construction time, it is beneficial to comprehensively evaluate the construction environment stability of different regions, ensuring that the construction stability evaluation not only considers the current risks but also makes dynamic adjustments in combination with the changes in construction time, improving the scientific nature of construction safety management.

[0051] In the process of optimizing the evaluation of the construction environment in the embodiments of the present invention, by dividing high, medium, and low stability regions and determining the emergency state of optimizing the construction environment in combination with the risk level, it is beneficial to accurately identify the construction regions that need to be optimized first, making the construction management more efficient and accurate, and improving the safety and construction efficiency of the construction process.

[0052] A database for storing the maximum allowable displacement and the maximum allowable stress set according to the geological conditions for each environmental monitoring region.

[0053] Please refer to Figure 2A tunnel construction environment detection method is shown as follows, including the following steps: Step 1, tunnel terrain analysis: Divide the area within a specified tunnel into each environmental monitoring area, collect the formation deformation information of each environmental monitoring area, and then calculate the comprehensive deformation risk index of each environmental monitoring area, so as to evaluate each potential deformation area within the specified tunnel.

[0054] Step 2, groundwater environment monitoring: According to each potential deformation area corresponding in the specified tunnel, by monitoring the change in groundwater pressure corresponding to each potential deformation area, and then evaluate the water inrush risk of the groundwater corresponding to each potential deformation area.

[0055] Step 3, construction stability evaluation: According to the comprehensive deformation risk index of each environmental monitoring area and the water inrush risk of the groundwater corresponding to each potential deformation area, and then calculate the construction stability index of each potential deformation area.

[0056] Step 4, construction environment optimization: According to the construction stability index of each potential deformation area, evaluate the stability of the construction environment corresponding to each potential deformation area within the specified tunnel.

[0057] For a tunnel construction environment detection system and method provided by an embodiment of the present invention, during the tunnel terrain analysis process, by dividing the area within a specified tunnel into each environmental detection area and collecting the formation deformation information of each environmental detection area, it is beneficial to accurately evaluate the geological stability of different positions of the tunnel and provide accurate basic data for subsequent construction stability analysis. During the formation deformation evaluation of the environmental detection area, by detecting the displacement of the tunnel surrounding rock, the stress suffered by the surrounding rock during construction, and the shear stress between the surrounding rock and the support structure, it is beneficial to comprehensively reflect the stress change situation of the surrounding rock during the construction process, ensure the comprehensive monitoring of the deformation risk, and reduce the occurrence probability of sudden geological disasters.

[0058] The above content is only an example and explanation of the concept of the present invention. Those skilled in the art of this technology make various modifications or supplements to the described specific embodiments or use similar methods to replace them. As long as they do not deviate from the concept of the invention or exceed the scope defined by this specification, they should all belong to the protection scope of the present invention.

Claims

1. A tunnel construction environment detection system, characterized in that: include: The tunnel terrain analysis module is used to divide the area in the designated tunnel into various environmental monitoring areas, collect the stratum deformation information of each environmental monitoring area, and then calculate the comprehensive deformation risk index of each environmental monitoring area to evaluate the potential deformation areas in the designated tunnel; The groundwater environment monitoring module is used to monitor the groundwater pressure changes corresponding to each potential deformation area in the designated tunnel, and then evaluate the groundwater inrush risk corresponding to each potential deformation area; The construction stability assessment module is used to calculate the construction stability index of each potential deformation area based on the comprehensive deformation risk index of each environmental monitoring area and the groundwater inrush risk corresponding to each potential deformation area; The construction environment optimization module is used to evaluate the stability of the construction environment corresponding to each potential deformation area in the specified tunnel based on the construction stability index of each potential deformation area.

2. A tunnel construction environment detection system according to claim 1, characterized in that: The specific process of collecting the stratum deformation information of each environmental monitoring area is as follows: According to the excavation depth in the designated tunnel, the excavation depth in the designated tunnel is evenly divided into various equal-depth sections, and each equal-depth section corresponds to each environmental monitoring area. The stratum deformation information includes the displacement of the tunnel surrounding rock and the stress exerted on the surrounding rock during the construction process, as well as the shear stress between the surrounding rock and the supporting structure. Each sensor equipment installation point is set in each environmental monitoring area, and the stratum deformation information of each environmental monitoring area corresponding to each sensor equipment installation point is obtained through detection by each sensor equipment. The stratum deformation information corresponding to each environmental monitoring area is obtained through mean calculation, and the maximum allowable displacement and maximum allowable stress set for each environmental monitoring area according to geological conditions are obtained from the database.

3. A tunnel construction environment detection system according to claim 2, characterized in that: The specific process of setting the maximum allowable displacement and maximum allowable stress according to geological conditions is as follows: The geotechnical elastic modulus is measured by using a pressure gauge at each sensor device installation point corresponding to each environmental monitoring area. The geotechnical elastic modulus of each sensor device installation point is calculated by the average value, and then the geotechnical elastic modulus Ei of each environmental monitoring area is obtained. According to the tunnel stress cross-sectional area corresponding to the location of each sensor device installation point in each environmental monitoring area, the stress cross-sectional area Si of each environmental monitoring area is obtained by the average value calculation, and then the calculation formula is used: Get the maximum allowable displacement of the i-th environmental monitoring area It is represented by the maximum shear stress of the rock corresponding to the i-th environmental monitoring area, and Li is represented by the length of the corresponding support structure in the i-th environmental monitoring area that withstands external forces; By calculation formula: Get the maximum allowable stress of the i-th environmental monitoring area Where SFi represents the safety factor corresponding to the set i-th environmental monitoring area.

4. A tunnel construction environment detection system according to claim 3, characterized in that: The specific process of calculating the comprehensive deformation risk index of each environmental monitoring area is as follows: By calculation formula: Get the comprehensive deformation risk index Ri of the i-th environmental monitoring area, i is the number corresponding to each environmental monitoring area, i = 1, 2, ..., n, n is the total number of environmental monitoring areas, where X i , Y i , Z i They respectively represent the tunnel surrounding rock displacement corresponding to the i-th environmental monitoring area in the specified tunnel, the stress exerted on the surrounding rock during the construction process, and the shear stress between the surrounding rock and the supporting structure.

5. A tunnel construction environment detection system according to claim 4, characterized in that: The specific process of evaluating the potential deformation areas in the specified tunnel is as follows: According to the comprehensive deformation risk index of each environmental monitoring area, it is divided into various risk levels. Each risk area corresponds to a standard comprehensive deformation risk index interval. If the comprehensive deformation risk index of an environmental monitoring area belongs to a set standard comprehensive deformation risk index interval, then the environmental monitoring area is determined to belong to the risk level corresponding to the standard comprehensive deformation risk index interval, and the comprehensive deformation risk index of the environmental monitoring area is compared with the set comprehensive deformation risk index threshold. If the comprehensive deformation risk index of the environmental monitoring area is greater than the set comprehensive deformation risk index threshold, then the environmental monitoring area is determined to be a potential deformation area, so as to obtain the potential deformation areas in the specified tunnel and the risk levels corresponding to the potential deformation areas. The risk levels include high risk level, medium risk level and low risk level.

6. A tunnel construction environment detection system according to claim 5, characterized in that: The specific process of monitoring the groundwater pressure changes corresponding to each potential deformation area is as follows: Set each water inrush monitoring time point, and obtain the water flow velocity and water pressure corresponding to each potential deformation area at each water inrush monitoring time point through flow sensors and groundwater pressure sensors. The water flow velocity of each potential deformation area at each water inrush monitoring time point is recorded as j represents the number of each potential deformation area, the value of j is a positive integer, t represents the number of each water inrush monitoring time point, t = 1, 2, ..., m, m is a positive integer, m represents the total number of water inrush monitoring time points, and the corresponding maximum water flow velocity in each potential deformation area is recorded as The water pressure of each potential deformation area at each water inrush monitoring time point is calculated by averaging to obtain the average water pressure of each potential deformation area. The maximum water pressure corresponding to each potential deformation area is subtracted from the minimum water pressure, and the result is divided by the average water pressure of each potential deformation area. The result is the groundwater pressure fluctuation rate Pj corresponding to each potential deformation area, which is calculated by the formula: Get the average water flow acceleration aj corresponding to the jth potential deformation area, It is represented as the water velocity of the jth potential deformation area at the t-1th water inrush monitoring time point, and Δt is represented as the time interval between time t and time t-1.

7. A tunnel construction environment detection system according to claim 6, characterized in that: The specific process of assessing the groundwater inrush risk corresponding to each potential deformation area is as follows: By calculation formula: The quantitative value of groundwater inrush risk R′ corresponding to the jth potential deformation area is obtained j , where α and β represent the first adjustment coefficient and the second adjustment coefficient respectively, and Qj represents the elastic variation coefficient of the surrounding rock corresponding to the jth potential deformation area.

8. A tunnel construction environment detection system according to claim 7, characterized in that: The specific process of calculating the construction stability index of each potential deformation area is as follows: According to the comprehensive deformation risk index of each environmental monitoring area and the quantitative value of groundwater inrush risk corresponding to each potential deformation area, the comprehensive deformation risk index corresponding to each potential deformation area is obtained, and the comprehensive deformation risk index corresponding to each potential deformation area is recorded as Rj. The calculation formula is: The construction stability index R′j′ of the jth potential deformation area is obtained, where λ represents the set construction time influence coefficient, and T represents the construction time from the start of the specified tunnel to the current moment.

9. A tunnel construction environment detection system according to claim 8, characterized in that: The specific process of evaluating the stability of each potential deformation area in the designated tunnel corresponding to the construction environment is as follows: The potential deformation areas in the designated tunnel are divided into high stability areas, medium stability areas and low stability areas. The high stability areas, medium stability areas and low stability areas correspond to the high standard construction stability index interval, medium standard construction stability index interval and low standard construction stability index interval respectively. The construction stability index of each potential deformation area is compared with the high standard construction stability index interval, medium standard construction stability index interval and low standard construction stability index interval respectively. If the construction stability index of a potential deformation area belongs to the high standard construction stability index interval, it indicates that the potential deformation area is a high stability area. If the risk level corresponding to the potential deformation area is a high risk level, the urgency of optimizing the construction environment corresponding to the potential deformation area is set to the first emergency state. If the risk level corresponding to the potential deformation area is a medium risk level, the urgency of optimizing the construction environment corresponding to the potential deformation area is set to the second emergency state. If the risk level corresponding to the potential deformation area is a low risk level, the urgency of optimizing the construction environment corresponding to the potential deformation area is set to the third emergency state. In this way, the stability of the construction environment corresponding to each potential deformation area and the urgency of optimizing the construction environment corresponding to each potential deformation area are evaluated.

10. A method for detecting a tunnel construction environment using a tunnel construction environment detection system according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: Tunnel terrain analysis: Divide the designated tunnel area into environmental monitoring areas, collect the stratum deformation information of each environmental monitoring area, and then calculate the comprehensive deformation risk index of each environmental monitoring area to evaluate the potential deformation areas in the designated tunnel; Step 2: Groundwater environment monitoring: According to the corresponding potential deformation areas in the designated tunnel, the groundwater pressure changes corresponding to each potential deformation area are monitored, and then the groundwater inrush risk corresponding to each potential deformation area is evaluated; Step 3: Construction stability assessment: Based on the comprehensive deformation risk index of each environmental monitoring area and the corresponding groundwater inrush risk of each potential deformation area, the construction stability index of each potential deformation area is calculated; Step 4: Construction environment optimization: Based on the construction stability index of each potential deformation area, the stability of the construction environment corresponding to each potential deformation area in the specified tunnel is evaluated.

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