Method and device for predicting existing tunnel deformation caused by over-crossing tunnel excavation

Abstract

The invention provides a method and a device for predicting existing tunnel deformation caused by over-crossing tunnel excavation, which can be applied to the technical field of tunnel engineering. The prediction method comprises the steps that newly-built tunnel information, soil mass information corresponding to a newly-built tunnel, existing tunnel information and tunnel relation information are obtained, and the tunnel relation information comprises angle information, distance relation information and conversion information between the newly-built tunnel and the existing tunnel; constructing a stress model based on the soil body information, the existing tunnel information, the new tunnel information and the tunnel relation information, and determining unloading pressure information generated by excavation of the new tunnel on the existing tunnel; and based on the unloading pressure information, the entity information of the equivalent entity, the existing tunnel information and the deformation prediction model, determining vertical deformation results corresponding to the plurality of point locations in the existing tunnel. Through the method, the maintenance cost can be reduced, the vertical deformation result of the tunnel can be predicted in real time, and the deformation coping capacity is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel engineering, and in particular to a method and device for predicting deformation of an existing tunnel caused by excavation of an overlying tunnel. Background Art

[0002] The construction of a new tunnel will inevitably disturb the surrounding soil, causing stress redistribution in the surrounding strata, resulting in uneven settlement or uplift of the existing tunnel. Existing tunnels will be deformed and subjected to additional stress due to the construction of new tunnels. If the additional stress is too large and exceeds the original design standard, it will affect the safety of the existing tunnel structure and easily cause safety hazards. In related technologies, real-time monitoring and prediction of the vertical displacement of the tunnel are achieved by integrating sensors, data collectors and data analysis technologies in the monitoring system.

[0003] However, in existing projects, overpass tunnels are relatively rare, which makes it easy to ignore the impact of overpass tunnels on the vertical deformation of the existing tunnel below during the excavation process; traditional monitoring methods are too dependent on monitoring equipment, which has high equipment costs, and the limited point monitoring information obtained by the monitoring equipment is difficult to fully reflect the deformation state of the entire tunnel; traditional model predictions tend to ignore relevant important information, resulting in low accuracy of prediction results. Summary of the invention

[0004] In view of the above problems, the present invention provides a method, device, equipment, medium and program product for predicting deformation of an existing tunnel caused by excavation of an overpass tunnel.

[0005] According to a first aspect of the present invention, there is provided a method for predicting deformation of an existing tunnel caused by excavation of an overpass tunnel, comprising: obtaining new tunnel information, soil information corresponding to the new tunnel, existing tunnel information and tunnel relationship information, wherein the tunnel relationship information comprises angle information, distance relationship information and conversion information between the new tunnel and the existing tunnel; constructing a stress model based on soil information, existing tunnel information, new tunnel information and tunnel relationship information, and using the stress model to determine unloading pressure information generated by excavation of the new tunnel on the existing tunnel; determining vertical deformation results corresponding to multiple points in the existing tunnel based on the unloading pressure information, entity information of the equivalent entity, the existing tunnel information and the deformation prediction model, wherein the equivalent entity represents an entity constructed according to the existing tunnel and the soil corresponding to the existing tunnel.

[0006] The second aspect of the present invention provides a prediction device for deformation of an existing tunnel caused by excavation of an overpass tunnel, including an information acquisition module for acquiring new tunnel information, soil information corresponding to the new tunnel, existing tunnel information and tunnel relationship information, wherein the tunnel relationship information includes angle information, distance relationship information and conversion information between the new tunnel and the existing tunnel; a stress model construction module for constructing a stress model based on soil information, existing tunnel information, new tunnel information and tunnel relationship information, and using the stress model to determine the unloading pressure information generated by the excavation of the new tunnel on the existing tunnel; a vertical deformation result determination module for determining the vertical deformation results corresponding to multiple points in the existing tunnel based on the unloading pressure information, entity information of the equivalent entity, the existing tunnel information and the deformation prediction model, wherein the equivalent entity represents an entity constructed based on the existing tunnel and the soil corresponding to the existing tunnel.

[0007] A third aspect of the present invention provides an electronic device, comprising: one or more processors; a memory for storing one or more computer programs, wherein the one or more processors execute the one or more computer programs to implement the steps of the above method.

[0008] The fourth aspect of the present invention further provides a computer-readable storage medium having a computer program or instructions stored thereon, which implements the steps of the above method when the computer program or instructions are executed by a processor.

[0009] The fifth aspect of the present invention also provides a computer program product, including a computer program or instructions, which implement the steps of the above method when executed by a processor.

[0010] According to the prediction method, device, equipment, medium and program product based on the deformation of the existing tunnel caused by the excavation of the upper tunnel provided by the embodiment of the present invention, a stress model is constructed by integrating the new tunnel information, the existing tunnel information, the surrounding soil information and the relationship information between the existing tunnel and the new tunnel. The various information complement each other, which helps to avoid the monitoring errors caused by the traditional monitoring method that only relies on limited point information. Since the stress model takes into account the unloading pressure generated by the excavation of the upper new tunnel on the existing tunnel below, the defect of ignoring the unloading pressure in the prediction of the traditional model is avoided, and the prediction accuracy of the longitudinal deformation of the existing tunnel is improved; by using the prediction model to predict deformation, the long-term dependence on monitoring equipment can be reduced, the equipment maintenance cost can be reduced, and the economy of the prediction method can be improved. Based on the real-time predicted vertical deformation results, predictive intervention can be made in the tunnel excavation, further improving the ability of the existing tunnel to cope with deformation during the excavation of the new tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The above contents and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0012] Figure 1 An application scenario diagram of a method, device, equipment, medium and program product for predicting deformation of an existing tunnel caused by over-tunnel excavation according to an embodiment of the present invention is shown.

[0013] Figure 2 A flow chart of a method for predicting deformation of an existing tunnel caused by excavation of an overlying tunnel according to an embodiment of the present invention is shown.

[0014] Figure 3 A schematic cross-sectional view of the arrangement of monitoring points in an existing tunnel according to an embodiment of the present invention is shown.

[0015] Figure 4 A schematic plan view showing the relationship between a newly-built tunnel and an existing tunnel according to an embodiment of the present invention is shown.

[0016] Figure 5 A schematic diagram showing a vertical deformation result of an existing tunnel predicted based on a deformation prediction model according to an embodiment of the present invention is shown.

[0017] Figure 6 A structural block diagram of a device for predicting deformation of an existing tunnel caused by excavation of an overlying tunnel according to an embodiment of the present invention is shown.

[0018] Figure 7 A block diagram of an electronic device suitable for implementing a method for predicting deformation of an existing tunnel caused by excavation of an overlying tunnel according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0019] Below, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of embodiments of the present invention. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of concepts of the present invention.

[0020] The terms used herein are only for describing specific embodiments and are not intended to limit the present invention. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0021] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0022] When using expressions such as "at least one of A, B, and C, etc.", they should generally be interpreted according to the meaning of the expression commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0023] In existing projects, overpass tunnels are relatively rare, which makes it easy to ignore the impact of overpass tunnels on the vertical deformation of the existing tunnel below during the excavation process; traditional monitoring methods are too dependent on monitoring equipment, which has high equipment costs, and the limited point monitoring information obtained by the monitoring equipment is difficult to fully reflect the deformation state of the entire tunnel; traditional model predictions tend to ignore relevant important information, resulting in low accuracy of prediction results.

[0024] In view of this, the present invention constructs a stress model by integrating the newly built tunnel information, the existing tunnel information, the surrounding soil information and the relationship information between the existing tunnel and the newly built tunnel. The various information complement each other, which helps to avoid the monitoring errors caused by relying solely on limited point information in the traditional monitoring method. Since the stress model takes into account the unloading pressure generated by the excavation of the upper newly built tunnel on the existing tunnel below, it avoids the defect of ignoring the unloading pressure in the traditional model prediction, and improves the prediction accuracy of the longitudinal deformation of the existing tunnel; by using the prediction model to predict deformation, it can reduce long-term dependence on monitoring equipment, reduce equipment maintenance costs, and improve the economy of the prediction method. Based on the real-time predicted vertical deformation results, predictive intervention can be made in tunnel excavation, further improving the ability of the existing tunnel to cope with deformation during the excavation of the new tunnel.

[0025] The embodiments of the present invention provide a prediction method, device, equipment, medium and program product based on the deformation of an existing tunnel caused by the excavation of an over-cross tunnel. The prediction method includes: obtaining new tunnel information, soil information corresponding to the new tunnel, existing tunnel information and tunnel relationship information, wherein the tunnel relationship information includes angle information, distance relationship information and conversion information between the new tunnel and the existing tunnel; constructing a stress model based on soil information, existing tunnel information, new tunnel information and tunnel relationship information to determine the unloading pressure information generated by the excavation of the new tunnel on the existing tunnel; determining the vertical deformation results corresponding to multiple points in the existing tunnel based on the unloading pressure information, entity information of the equivalent entity, existing tunnel information and the deformation prediction model, wherein the equivalent entity represents an entity constructed according to the existing tunnel and the soil corresponding to the existing tunnel.

[0026] Figure 1 An application scenario diagram of a method, device, equipment, medium and program product for predicting deformation of an existing tunnel caused by over-tunnel excavation according to an embodiment of the present invention is shown.

[0027] like Figure 1 As shown, the application scenario according to this embodiment may include a first terminal device 101, a second terminal device 102, a third terminal device 103, a network 104, a server 105, and a data acquisition device 106. The network 104 is used to provide a medium for a communication link between the first terminal device 101, the second terminal device 102, the third terminal device 103, and the server 105. The network 104 may include various connection types, such as wired, wireless communication links, or optical fiber cables, etc.

[0028] The data acquisition device 106 may include various types of sensing devices (e.g., displacement meters) and soil information acquisition devices (e.g., soil consolidation instruments, drilling equipment). The sensing devices may be used to detect deformation information and displacement information during the excavation of a new tunnel, and the soil information acquisition devices may be used to acquire soil information corresponding to the soil surrounding the new tunnel and the existing tunnel. It is understood that the data acquisition device may also include data acquisition devices that read or identify existing tunnels from drawings, for example, automated equipment that uses computer programming technology to parse and process tunnel drawings. The data acquisition device 106 may be connected to the server 105 through the network 104 to communicate with the server 105 to transmit the acquired data to the server 105 for processing.

[0029] The user can use the first terminal device 101, the second terminal device 102, and the third terminal device 103 to interact with the server 105 through the network 104 to receive or send messages, etc. Various communication client applications can be installed on the first terminal device 101, the second terminal device 102, and the third terminal device 103, such as shopping applications, web browser applications, search applications, instant messaging tools, email clients, social platform software, etc. (only for example).

[0030] The first terminal device 101, the second terminal device 102, and the third terminal device 103 may be various electronic devices having display screens and supporting web browsing, including but not limited to smart phones, tablet computers, laptop computers, desktop computers, and the like.

[0031] The server 105 may be a server that provides various services, such as a background management server (only as an example) that provides support for websites browsed by users using the first terminal device 101, the second terminal device 102, and the third terminal device 103. The background management server may analyze and process the received data such as user requests, and feed back the processing results (such as web pages, information, or data obtained or generated according to user requests) to the terminal device.

[0032] It should be noted that the prediction method based on the deformation of the existing tunnel caused by the excavation of the upper tunnel provided in the embodiment of the present invention can generally be executed by the server 105. Accordingly, the prediction device based on the deformation of the existing tunnel caused by the excavation of the upper tunnel provided in the embodiment of the present invention can generally be set in the server 105. The prediction method based on the deformation of the existing tunnel caused by the excavation of the upper tunnel provided in the embodiment of the present invention can also be executed by a server or server cluster that is different from the server 105 and can communicate with the first terminal device 101, the second terminal device 102, the third terminal device 103 and / or the server 105. Accordingly, the prediction device based on the deformation of the existing tunnel caused by the excavation of the upper tunnel provided in the embodiment of the present invention can also be set in a server or server cluster that is different from the server 105 and can communicate with the first terminal device 101, the second terminal device 102, the third terminal device 103 and / or the server 105.

[0033] It should be understood that Figure 1 The number of terminal devices, networks, data collection devices and servers in the embodiment is only for illustration. Any number of terminal devices, networks, data collection devices and servers may be provided according to the implementation requirements.

[0034] The following will be based on Figure 1 The scene described by Figure 2~Figure 5 A method for predicting deformation of an existing tunnel caused by excavation of an overpass tunnel according to an embodiment of the present invention is described in detail.

[0035] Figure 2 A flow chart of a method for predicting deformation of an existing tunnel caused by excavation of an overlying tunnel according to an embodiment of the present invention is shown.

[0036] like Figure 2 As shown, the prediction method of the existing tunnel deformation caused by the excavation of the overpass tunnel in this embodiment includes operations S210 to S230.

[0037] In operation S210, newly built tunnel information, soil information corresponding to the newly built tunnel, existing tunnel information and tunnel relationship information are obtained, wherein the tunnel relationship information includes angle information, distance relationship information and conversion information between the newly built tunnel and the existing tunnel.

[0038] In an embodiment of the present invention, the newly built tunnel is an excavated tunnel located above the existing tunnel. The newly built tunnel information, soil information and existing tunnel information can be obtained through data acquisition equipment. The newly built tunnel information may include tunnel segment information of the newly built tunnel, equipment information of the tunnel excavation equipment and geometric information of the newly built tunnel. The existing tunnel information may include geometric information of the existing tunnel. The soil information may represent the soil information around the newly built tunnel and the existing tunnel.

[0039] In operation S220, a stress model is constructed based on soil information, existing tunnel information, new tunnel information, and tunnel relationship information, and the stress model is used to determine unloading pressure information generated by excavation of the new tunnel on the existing tunnel.

[0040] In an embodiment of the present invention, the stress model can be used to predict the additional vertical unloading pressure (i.e., unloading pressure information) generated by the excavation of a new upper tunnel on an existing tunnel. It can be understood that the unloading pressure information can be comprehensively determined based on the unloading pressure values ​​of multiple different monitoring points.

[0041] In operation S230, vertical deformation results corresponding to multiple points in the existing tunnel are determined based on the unloading pressure information, entity information of the equivalent entity, existing tunnel information and a deformation prediction model, wherein the equivalent entity represents an entity constructed according to the existing tunnel and the soil corresponding to the existing tunnel.

[0042] In an embodiment of the present invention, the equivalent entity information can be obtained by considering the existing tunnel located at the lower layer and the soil within a preset range around the existing tunnel as an integral equivalent beam. The deformation prediction model can be used to predict the vertical deformation result of any point in the existing tunnel under the action of continuous unloading pressure during or after the excavation of a new tunnel.

[0043] According to an embodiment of the present invention, a stress model is constructed by integrating the newly built tunnel information, the existing tunnel information, the surrounding soil information and the relationship information between the existing tunnel and the newly built tunnel. The various information complement each other, which helps to avoid the monitoring errors caused by relying solely on limited point information in the traditional monitoring method. Since the stress model takes into account the unloading pressure generated by the excavation of the upper newly built tunnel on the existing tunnel below, the defect of ignoring the unloading pressure in the traditional model prediction is avoided, and the prediction accuracy of the longitudinal deformation of the existing tunnel is improved; by using the prediction model to predict deformation, the long-term dependence on monitoring equipment can be reduced, the equipment maintenance cost can be reduced, and the economy of the prediction method can be improved. Based on the real-time predicted vertical deformation results, predictive intervention can be made in tunnel excavation, further improving the ability of the existing tunnel to cope with deformation during the excavation of the new tunnel.

[0044] According to an embodiment of the present invention, the newly-built tunnel information includes segment geometry information, segment weight information, equipment information and second distance information, the soil information includes soil weight information and strain information, the existing tunnel information includes first distance information, and the distance relationship information represents the shortest distance information between multiple target points in the newly-built tunnel and the intersection of the existing tunnel and the newly-built tunnel; a stress model is constructed based on the soil information, the existing tunnel information, the newly-built tunnel information and the tunnel relationship information to determine the unloading pressure information generated by the excavation of the newly-built tunnel on the existing tunnel, including: using the soil weight information, equipment information, segment geometry information, segment weight information and update parameters to determine the release load information, the release load information represents the difference between the unit excavation soil weight corresponding to the newly-built tunnel and the weight of the newly-built tunnel segment; a stress model is constructed based on the release load information, strain information, the first distance information, the second distance information, angle information, distance relationship information and conversion information; and the unloading pressure information is determined using the stress model.

[0045] In an embodiment of the present invention, the pipe segment may represent a concrete pipe segment of a newly constructed tunnel. The pipe segment geometric information may include the outer diameter of the pipe segment and the inner diameter of the pipe segment, which may be respectively denoted as R o and R i The equipment information can represent the shield machine information of the newly built tunnel, such as the outer diameter of the shield machine, which can be recorded as R. The segment weight information can represent the weight of the concrete segment, which can be recorded as γ t The release load information can characterize the release load after the excavation of the new tunnel, which is determined by the difference between the weight of the excavated soil per unit length of the new tunnel and the weight of the tunnel lining, which can be recorded as q. The second distance information can characterize the buried depth of the axis of the new tunnel.

[0046] Figure 3 A schematic cross-sectional view of the arrangement of monitoring points in an existing tunnel according to an embodiment of the present invention is shown.

[0047] like Figure 3As shown, the newly built tunnel 301 can be a shield tunnel above the existing tunnel 302. The construction of the newly built tunnel 301 disturbs the surrounding soil, which can cause stress redistribution in the strata within the surrounding relevant range, resulting in uneven settlement or uplift of the existing tunnel 302, which is the release load information q of the existing tunnel 302. The vertical displacement information of the existing tunnel can be collected in real time by the monitoring device 303 set at a preset distance above the existing tunnel. The distance from the surface to the axis 304 of the existing tunnel, that is, the first distance information, can be recorded as z0, the buried depth of the axis of the newly built tunnel (the distance from the surface to the axis 305 of the newly built tunnel) can be recorded as h, the outer diameter of the shield machine of the newly built tunnel can be recorded as R, and the outer diameter of the existing tunnel can be recorded as D. Through the deformation prediction model, the tunnel deformation results corresponding to multiple points in the existing tunnel can be determined in real time, and the tunnel deformation results can be characterized by a curve 306 composed of vertical deformation results of multiple monitoring points.

[0048] In the embodiment of the present invention, the soil weight information can represent the weight of the excavated soil, which can be recorded as γ s , the strain information of the soil can represent the Poisson's ratio of the soil, which can be recorded as μ. The first distance information can represent the distance from the surface to the axis of the existing tunnel, which can be recorded as z0. The multiple target points include a first point and a second point; the shortest distance information between the multiple target points and the intersection of the existing tunnel and the newly built tunnel can include a first distance value between the first point and the intersection of the existing tunnel and the newly built tunnel, and a second distance value between the second point and the intersection of the existing tunnel and the newly built tunnel.

[0049] In an embodiment of the present invention, the update parameter may represent an update coefficient corresponding to the initial release load information. The calculated release load information may be made more accurate by updating the parameter. The update parameter may be denoted as ρ, and the initial release load information may be denoted as q.

[0050] In an embodiment of the present invention, the angle information can represent the angle between the horizontal projection of the newly built tunnel and the existing tunnel, which can be denoted as α, and the value range of α can be 0° to 90°. The distance relationship information can include first distance relationship information and second distance relationship information. The first distance relationship information can represent the advancement distance information between the shield starting surface and the intersection of the existing tunnel and the newly built tunnel, which is denoted as L1. The second distance relationship information can represent the advancement distance information between the excavation surface of the tunnel and the intersection of the existing tunnel and the newly built tunnel, which is denoted as L2. The conversion information can be used to represent the conversion coefficient between the coordinate information of the existing tunnel and the coordinate information of the newly built tunnel. The conversion information may include a first conversion coefficient, and the first conversion coefficient includes multiple conversion sub-coefficients, which are denoted as R1 and R2 respectively.

[0051] For example, the stress model can be constructed using the following formula (1):

[0052] (1);

[0053] Among them, σ z (x') can represent the unloading pressure information generated by the excavation of the new tunnel on the existing tunnel, μ can represent the Poisson's ratio of the soil, ρ can represent the update parameter, z0 can represent the distance from the surface to the axis of the existing tunnel, q can represent the initial release load information after the excavation of the new tunnel, which can be determined by the difference between the weight of the excavated soil per unit length and the weight of the tunnel segment, h can represent the buried depth of the axis of the new tunnel, R o It can represent the outer diameter of the newly built tunnel segment, L1 can represent the advancement distance information from the shield starting surface to the intersection, L2 can represent the advancement distance information from the excavation surface to the intersection, dλ can represent the result obtained by differential calculation of λ, and dη can represent the result obtained by differential calculation of η.

[0054] According to the embodiment of the present invention, considering that the traditional technology tends to ignore the influence of the upper tunnel on the vertical deformation of the existing tunnel below during the excavation process, in order to solve this problem, the present invention can comprehensively consider the redistribution of soil stress during the excavation of the upper new tunnel, and the influence of this stress change on the stress of the surrounding rock of the existing tunnel below, so as to more accurately simulate the actual stress environment of the existing tunnel. The stress model can effectively improve the accuracy of the deformation prediction of the existing tunnel through stress coupling analysis, and avoid the prediction deviation of the deformation of the existing tunnel caused by ignoring the stress interaction.

[0055] It can be understood that an example of how to determine the unloading pressure information has been described above, and an example of how to determine the release load information will be described below.

[0056] According to an embodiment of the present invention, release load information is determined using soil mass information, equipment information, segment geometry information, segment weight information and update parameters, including: determining initial release load information corresponding to the excavation of a new tunnel based on soil mass information, equipment information, segment geometry information and segment weight information; and updating the initial release load information using update parameters to obtain release load information, wherein the update parameters are determined based on existing tunnel information.

[0057] In an embodiment of the present invention, the calculation method of the initial release load information q can be shown in the following formula (2):

[0058] (2);

[0059] Among them, γ s can represent the weight of the excavated soil, R can represent the outer diameter of the shield machine for the newly built tunnel, and γ t It can characterize the weight of the concrete segment, Ri It can characterize the inner diameter of the segment of the new tunnel, R o The outer diameter of the segments of a newly built tunnel can be characterized.

[0060] After the initial release load information q is determined, the initial release load information may be updated using the update parameter ρ to obtain the release load information, namely ρ.q.

[0061] According to an embodiment of the present invention, the existing tunnel information further includes existing tunnel geometry information, and the method further includes: determining a ratio between the first distance information and the existing tunnel geometry information; and determining an update parameter based on a difference between the ratio and a preset ratio threshold.

[0062] In an embodiment of the present invention, the existing tunnel geometry information may include the outer diameter of the existing tunnel, denoted as D. The preset ratio threshold may be determined according to actual conditions or relevant specifications, for example, 0.5. The update parameter may be determined according to the difference between the ratio and the preset ratio threshold. When the difference between the ratio and the preset ratio threshold is greater than 0, the first update parameter is used as the update parameter; when the difference between the ratio and the preset ratio threshold is less than or 0, the second update parameter is used as the update parameter. The determination of the update parameter ρ is shown in the following formula (3):

[0063] (3);

[0064] Among them, z0 can represent the distance from the ground surface to the axis of the existing tunnel, that is, the first distance information.

[0065] According to an embodiment of the present invention, taking into account that after the excavation of a new tunnel, the released load will change with the progress of the construction, the present invention flexibly determines different update parameters according to the actual engineering conditions by utilizing the difference between the ratio of the first distance information and the existing tunnel geometry information and a preset ratio threshold, thereby utilizing the update parameters to update the initial released load information. Through different update coefficients, the size and distribution of the released load can be dynamically adjusted, thereby more accurately reflecting the actual load changes on the existing tunnel.

[0066] According to an embodiment of the present invention, the conversion information includes a coordinate conversion relationship and a first conversion coefficient; the method also includes: determining the coordinate conversion relationship based on the angle between the horizontal projection of the existing tunnel and the horizontal projection of the newly built tunnel; and determining the first conversion coefficient using the angle, the coordinate conversion relationship, the first distance information and the second distance information.

[0067] Figure 4 A schematic plan view showing the relationship between a newly-built tunnel and an existing tunnel according to an embodiment of the present invention is shown.

[0068] like Figure 4As shown, (λ, η) can be the coordinate information corresponding to the newly built tunnel 301, and (x, y) can be the coordinate information corresponding to the existing tunnel 302. L1 can represent the advancement distance information from the shield starting surface to the intersection point, and L2 can represent the advancement distance information from the excavation surface to the intersection point. o can represent the outer diameter of the newly built tunnel 301, and α can represent the angle between the horizontal projections of the existing tunnel and the newly built tunnel.

[0069] In an embodiment of the present invention, the coordinate transformation relationship can represent the transformation relationship between the coordinate information of the newly built tunnel and the coordinate information of the existing tunnel, and can include a first transformation relationship and a second transformation relationship. The first coordinate transformation relationship, λ=x'sinα, η can represent the second coordinate transformation relationship, η= x'cosα. The first transformation coefficient can include multiple sub-transformation coefficients based on the relationship between the second distance information and the first distance information, which can be recorded as R1 and R2. The determination method of R1 and R2 is shown in the following formulas (4)-(5):

[0070] (4);

[0071] (5);

[0072] Among them, z0 can represent the first distance information, and h can represent the second distance information.

[0073] According to an embodiment of the present invention, by simplifying the transformation of the relationship between multiple independent variables (such as the first transformation relationship and the second transformation relationship, the first distance information and the second distance information) through multiple sub-transformation coefficients, challenges related to data distribution and intrinsic characteristics can be addressed, such as solving problems such as skewness, outliers and variable scalability, thereby improving model performance and computational efficiency.

[0074] According to an embodiment of the present invention, using a stress model to determine unloading pressure information includes: determining a reference point corresponding to the point, the reference point being a plurality of associated points corresponding to the point; and using the stress model to determine reference unloading pressure information of the reference point.

[0075] In an embodiment of the present invention, the reference point can represent the related points associated with the point, which is a position parameter in the integral change process, and can be used to represent a certain position on the existing tunnel, denoted as ξ. The unloading effect of the reference point ξ can affect the displacement of the point x', denoted as dw(x'), and to calculate w(x'), the contribution information of all ξ within the length of the existing tunnel can be accumulated through integration to obtain the total displacement w(x') at the desired point x'. Referring to the stress model in the above formula (1), the reference unloading pressure information corresponding to the reference point can be obtained, denoted as σ z (ξ).

[0076] According to an embodiment of the present invention, entity information includes entity elastic modulus and section inertia moment; based on reference unloading pressure information, entity information of equivalent entity, existing tunnel information and deformation prediction model, vertical deformation results corresponding to multiple points in the existing tunnel are obtained, including: constructing a deformation prediction model based on reference point information, reference unloading pressure information and existing tunnel information; using entity elastic modulus and section inertia moment to determine bending stiffness information corresponding to the equivalent entity; inputting bending stiffness information, second conversion coefficient and foundation information into the deformation prediction model to obtain vertical deformation results, wherein the foundation information represents the foundation bed coefficient of the existing tunnel.

[0077] In an embodiment of the present invention, after determining the reference unloading pressure information, based on the reference point information ξ and the reference unloading pressure information σ z (ξ), the outer diameter D of the existing tunnel, the second conversion coefficient β and the point information x', a deformation prediction model is constructed. The deformation prediction model is described in the following formula (6):

[0078] (6);

[0079] Among them, w(x') can represent the vertical displacement of any point in the existing tunnel under the action of continuous unloading pressure, σ z (ξ) can represent the reference unloading pressure information, E can represent the elastic modulus of the equivalent beam (equivalent entity), and I is the section inertia moment of the equivalent beam. (EI) eq It can characterize the bending stiffness information of the equivalent entity, (EI) eq =0.85EI.

[0080] According to an embodiment of the present invention, the soil information includes soil elastic modulus, and the foundation information is determined by the following operation: the foundation information is determined using bending stiffness information, soil elastic modulus, strain information and existing tunnel geometry information.

[0081] In an embodiment of the present invention, the bending stiffness information can be calculated based on the product of the elastic modulus of the equivalent beam (equivalent entity) and the section inertia moment of the equivalent beam, that is, EI. After the bending stiffness information is determined, the foundation bed coefficient of the existing tunnel can be determined according to the bending stiffness information, the outer diameter of the existing tunnel, the Young's modulus of the soil, and the Poisson's ratio of the soil. The foundation bed coefficient K is calculated as shown in the following formula (7):

[0082] (7);

[0083] in, It can characterize the elastic modulus of the soil (Young's modulus of the soil), D can characterize the outer diameter of the existing tunnel, and μ can characterize the Poisson's ratio of the soil.

[0084] According to an embodiment of the present invention, the soil information also includes shear stiffness information, and the second conversion coefficient can be determined by the following operation: determining the second conversion coefficient using the shear stiffness information, foundation information, existing tunnel geometry information and bending stiffness information.

[0085] The second conversion coefficient β can be expressed as follows:

[0086] (8);

[0087] Among them, K can represent the foundation coefficient of the existing tunnel, and G can represent the shear stiffness of the soil.

[0088] After the deformation prediction model is determined, the vertical displacement information (vertical deformation result) of the existing tunnel during the next excavation across the existing tunnel can be predicted based on the new tunnel information, soil information and existing tunnel information collected in real time by the data acquisition equipment.

[0089] Figure 5 A schematic diagram showing a vertical deformation result of an existing tunnel predicted based on a deformation prediction model according to an embodiment of the present invention is shown.

[0090] like Figure 5 As shown in the figure, in order to improve the prediction accuracy of the deformation prediction model, the relevant engineering information in Case 1 (new tunnel information, soil information and existing tunnel information) can be used for verification. The vertical displacement information of the existing tunnel at the actual monitoring point obtained by the monitoring equipment in Case 1 is verified with the displacement curve of the vertical deformation result predicted by the deformation prediction model.

[0091] Substituting the unloading pressure information calculated based on the stress model into the deformation prediction model can predict the vertical deformation result of the existing tunnel when the next excavation is carried out across the existing tunnel. When the vertical deformation result is greater than the preset deformation threshold, an alarm can be issued to relevant personnel through the alarm unit of the deformation monitoring platform. Table 1 shows the relevant engineering information of Case 1 according to an embodiment of the present invention.

[0092] Table 1

[0093]

[0094] The maximum vertical displacement of the existing tunnel calculated based on the above engineering information The comparison results between the actual monitoring of Case 1 are shown in Table 2 below. Table 2 shows the prediction accuracy of the deformation prediction model according to an embodiment of the present invention.

[0095] Table 2

[0096]

[0097] As can be seen from Table 2, the vertical deformation results predicted by the deformation prediction model of the present invention are highly accurate.

[0098] Based on the above-mentioned prediction method for deformation of existing tunnels caused by overpass tunnel excavation, the present invention also provides a prediction device for deformation of existing tunnels caused by overpass tunnel excavation. Figure 6 The device is described in detail.

[0099] Figure 6 A structural block diagram of a device for predicting deformation of an existing tunnel caused by excavation of an overlying tunnel according to an embodiment of the present invention is shown.

[0100] like Figure 6 As shown, the prediction device for deformation of an existing tunnel caused by excavation of an overpass tunnel in this embodiment includes an information acquisition module 610 , a stress model construction module 620 and a vertical deformation result determination module 630 .

[0101] The information acquisition module 610 is used to acquire the newly built tunnel information, the soil information corresponding to the newly built tunnel, the existing tunnel information and the tunnel relationship information, wherein the tunnel relationship information includes the angle information, the distance relationship information and the conversion information between the newly built tunnel and the existing tunnel. In one embodiment, the information acquisition module 610 can be used to perform the operation S210 described above, which will not be repeated here.

[0102] The stress model building module 620 is used to build a stress model based on soil information, existing tunnel information, new tunnel information and tunnel relationship information to determine the unloading pressure information generated by the excavation of the new tunnel on the existing tunnel. In one embodiment, the stress model building module 620 can be used to perform the operation S220 described above, which will not be repeated here.

[0103] The vertical deformation result determination module 630 is used to determine the vertical deformation results corresponding to multiple points in the existing tunnel based on the unloading pressure information, the entity information of the equivalent entity, the existing tunnel information and the deformation prediction model, wherein the equivalent entity represents an entity constructed according to the existing tunnel and the soil corresponding to the existing tunnel. In one embodiment, the vertical deformation result determination module 630 can be used to perform the operation S230 described above, which will not be repeated here.

[0104] According to an embodiment of the present invention, through the information acquisition module 610, the stress model construction module 620 and the vertical deformation result determination module 630 in the prediction device based on the deformation of the existing tunnel caused by the excavation of the upper tunnel, the stress model is constructed by integrating the new tunnel information, the existing tunnel information, the surrounding soil information and the relationship information between the existing tunnel and the new tunnel. Various information complement each other, which helps to avoid the monitoring errors caused by relying only on limited point information in the traditional monitoring method. Since the stress model takes into account the unloading pressure generated by the excavation of the upper new tunnel on the existing tunnel below, the defect of ignoring the unloading pressure in the traditional model prediction is avoided, and the prediction accuracy of the longitudinal deformation of the existing tunnel is improved; by using the prediction model to predict deformation, the long-term dependence on monitoring equipment can be reduced, the equipment maintenance cost can be reduced, and the economy of the prediction method can be improved. Based on the real-time predicted vertical deformation results, predictive intervention can be made in tunnel excavation, further improving the ability of the existing tunnel to cope with deformation during the excavation of the new tunnel.

[0105] According to an embodiment of the present invention, the newly built tunnel information includes segment geometry information, segment weight information, equipment information and second distance information, the soil information includes soil weight information and strain information, the existing tunnel information includes first distance information, and the distance relationship information represents the shortest distance information between multiple target points in the newly built tunnel and the intersection of the existing tunnel and the newly built tunnel; the stress model construction module 620 includes: a release load information determination submodule, a stress model construction submodule and an unloading pressure information determination submodule. The release load information determination submodule is used to determine the release load information using soil weight information, equipment information, segment geometry information, segment weight information and update parameters, and the release load information represents the difference between the unit excavation soil weight corresponding to the newly built tunnel and the weight of the newly built tunnel segment; the stress model construction submodule is used to construct a stress model based on the release load information, strain information, first distance information, second distance information, angle information, distance relationship information and conversion information; the unloading pressure information determination submodule is used to determine the unloading pressure information using the stress model.

[0106] According to an embodiment of the present invention, the release load information determination submodule includes: an initial release load information determination unit and an initial release load information update unit. The initial release load information determination unit is used to determine the initial release load information corresponding to the excavation of the new tunnel based on soil weight information, equipment information, segment geometry information and segment weight information; the initial release load information update unit is used to update the initial release load information using update parameters to obtain release load information, wherein the update parameters are determined based on the existing tunnel information.

[0107] According to an embodiment of the present invention, the existing tunnel information further includes existing tunnel geometry information, and the device further includes: a ratio determination module and an update parameter determination module. The ratio determination module is used to determine the ratio between the first distance information and the existing tunnel geometry information; and the update parameter determination module is used to determine the update parameter based on the difference between the ratio and a preset ratio threshold.

[0108] According to an embodiment of the present invention, the conversion information includes a coordinate conversion relationship and a first conversion coefficient; the device further includes: a coordinate conversion relationship determination module and a first conversion coefficient determination module. The coordinate conversion relationship determination module is used to determine the coordinate conversion relationship according to the angle between the horizontal projection of the existing tunnel and the horizontal projection of the newly built tunnel; the first conversion coefficient determination module is used to determine the first conversion coefficient using the angle, the coordinate conversion relationship, the first distance information and the second distance information.

[0109] According to an embodiment of the present invention, the unloading pressure information determination submodule includes: a reference point determination unit and an unloading pressure information determination unit. The reference point determination unit is used to determine a reference point corresponding to the point, and the reference point is a plurality of associated points corresponding to the point; the unloading pressure information determination unit is used to determine the reference unloading pressure information of the reference point using a stress model.

[0110] According to an embodiment of the present invention, the entity information includes entity elastic modulus and section inertia moment; the vertical deformation result determination module 630 includes: a prediction model construction submodule, a bending stiffness information determination submodule and an information input submodule. The prediction model construction submodule is used to construct a deformation prediction model based on reference point information, reference unloading pressure information and existing tunnel information; the bending stiffness information determination submodule is used to determine the bending stiffness information corresponding to the equivalent entity using the entity elastic modulus and section inertia moment; the information input submodule is used to input the bending stiffness information, the second conversion coefficient and the foundation information into the deformation prediction model to obtain the vertical deformation result, wherein the foundation information represents the foundation bed coefficient of the existing tunnel.

[0111] According to an embodiment of the present invention, the soil information includes soil elastic modulus, and the foundation information is determined by the following operation: the foundation information is determined using bending stiffness information, soil elastic modulus, strain information and existing tunnel geometry information.

[0112] According to an embodiment of the present invention, the soil information also includes shear stiffness information, and the second conversion coefficient can be determined by the following operation: determining the second conversion coefficient using the shear stiffness information, foundation information, existing tunnel geometry information and bending stiffness information.

[0113] According to an embodiment of the present invention, any multiple modules of the information acquisition module 610, the stress model construction module 620 and the vertical deformation result determination module 630 can be combined into one module for implementation, or any one of the modules can be split into multiple modules. Alternatively, at least part of the functions of one or more of these modules can be combined with at least part of the functions of other modules and implemented in one module. According to an embodiment of the present invention, at least one of the information acquisition module 610, the stress model construction module 620 and the vertical deformation result determination module 630 can be at least partially implemented as a hardware circuit, such as a field programmable gate array (FPGA), a programmable logic array (PLA), a system on a chip, a system on a substrate, a system on a package, an application specific integrated circuit (ASIC), or can be implemented by hardware or firmware such as any other reasonable way of integrating or packaging the circuit, or implemented in any one of the three implementation methods of software, hardware and firmware or in any appropriate combination of any of them. Alternatively, at least one of the information acquisition module 610, the stress model construction module 620 and the vertical deformation result determination module 630 can be at least partially implemented as a computer program module, and when the computer program module is run, the corresponding function can be executed.

[0114] Figure 7 A block diagram of an electronic device suitable for implementing a method for predicting deformation of an existing tunnel caused by excavation of an overlying tunnel according to an embodiment of the present invention is shown.

[0115] like Figure 7 As shown, the electronic device according to an embodiment of the present invention includes a processor 701, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 702 or a program loaded from a storage part 708 to a random access memory (RAM) 703. The processor 701 may include, for example, a general-purpose microprocessor (e.g., a CPU), an instruction set processor and / or a related chipset and / or a special-purpose microprocessor (e.g., an application-specific integrated circuit (ASIC)), etc. The processor 701 may also include an onboard memory for caching purposes. The processor 701 may include a single processing unit or multiple processing units for performing different actions of the method flow according to an embodiment of the present invention.

[0116] In RAM 703, various programs and data required for the operation of the electronic device are stored. The processor 701, ROM 702 and RAM 703 are connected to each other via a bus 704. The processor 701 performs various operations of the method flow according to the embodiment of the present invention by executing the programs in ROM 702 and / or RAM 703. It should be noted that the program can also be stored in one or more memories other than ROM 702 and RAM 703. The processor 701 can also perform various operations of the method flow according to the embodiment of the present invention by executing the programs stored in the one or more memories.

[0117] According to an embodiment of the present invention, the electronic device may further include an input / output (I / O) interface 705, which is also connected to the bus 704. The electronic device may further include one or more of the following components connected to the input / output (I / O) interface 705: an input portion 706 including a keyboard, a mouse, etc.; an output portion 707 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage portion 708 including a hard disk, etc.; and a communication portion 709 including a network interface card such as a LAN card, a modem, etc. The communication portion 709 performs communication processing via a network such as the Internet. A drive 710 is also connected to the input / output (I / O) interface 705 as needed. A removable medium 711, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 710 as needed, so that a computer program read therefrom is installed into the storage portion 708 as needed.

[0118] The present invention also provides a computer-readable storage medium, which may be included in the device / apparatus / system described in the above embodiment; or may exist independently without being assembled into the device / apparatus / system. The above computer-readable storage medium carries one or more programs, and when the above one or more programs are executed, the method according to the embodiment of the present invention is implemented.

[0119] According to an embodiment of the present invention, the computer-readable storage medium may be a non-volatile computer-readable storage medium, for example, it may include but is not limited to: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present invention, the computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, an apparatus or a device. For example, according to an embodiment of the present invention, the computer-readable storage medium may include the ROM 702 and / or RAM 703 described above and / or one or more memories other than ROM 702 and RAM 703.

[0120] The embodiment of the present invention also includes a computer program product, which includes a computer program, and the computer program contains program code for executing the method shown in the flowchart. When the computer program product is run in a computer system, the program code is used to enable the computer system to implement the prediction method for deformation of an existing tunnel caused by over-crossing tunnel excavation provided by the embodiment of the present invention.

[0121] The computer program executes the above functions defined in the system / device of the embodiment of the present invention when it is executed by the processor 701. According to the embodiment of the present invention, the system, device, module, unit, etc. described above can be implemented by a computer program module.

[0122] In one embodiment, the computer program may rely on tangible storage media such as optical storage devices, magnetic storage devices, etc. In another embodiment, the computer program may also be transmitted and distributed in the form of signals on a network medium, and downloaded and installed through the communication part 709, and / or installed from the removable medium 711. The program code contained in the computer program may be transmitted using any appropriate network medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0123] In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 709, and / or installed from the removable medium 711. When the computer program is executed by the processor 701, the above functions defined in the system of the embodiment of the present invention are performed. According to the embodiment of the present invention, the system, device, means, module, unit, etc. described above can be implemented by a computer program module.

[0124] According to an embodiment of the present invention, the program code for executing the computer program provided by the embodiment of the present invention can be written in any combination of one or more programming languages. Specifically, these computing programs can be implemented using high-level process and / or object-oriented programming languages, and / or assembly / machine languages. Programming languages ​​include, but are not limited to, Java, C++, python, "C" language or similar programming languages. The program code can be executed entirely on the user computing device, partially on the user device, partially on the remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device can be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computing device (e.g., using an Internet service provider to connect through the Internet).

[0125] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present invention. In this regard, each box in the flow chart or block diagram can represent a module, a program segment, or a part of a code, and the above-mentioned module, program segment, or a part of a code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flow chart, and the combination of the boxes in the block diagram or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0126] It will be appreciated by those skilled in the art that the features described in the various embodiments of the present invention may be combined and / or combined in various ways, even if such combinations or combinations are not explicitly described in the present invention. In particular, without departing from the spirit and teachings of the present invention, the features described in the various embodiments of the present invention may be combined and / or combined in various ways. All of these combinations and / or combinations fall within the scope of the present invention.

[0127] The embodiments of the present invention are described above. However, these embodiments are only for the purpose of illustration, and are not intended to limit the scope of the present invention. Although each embodiment is described above, it does not mean that the measures in each embodiment cannot be used in combination advantageously. Without departing from the scope of the present invention, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present invention.

Claims

1. A method for predicting deformation of an existing tunnel caused by overpass tunnel excavation, characterized in that: The method comprises: Acquire new tunnel information, soil information corresponding to the new tunnel, existing tunnel information and tunnel relationship information, wherein the tunnel relationship information includes angle information, distance relationship information and conversion information between the new tunnel and the existing tunnel; Building a stress model based on the soil information, the existing tunnel information, the newly built tunnel information and the tunnel relationship information, and using the stress model to determine the unloading pressure information generated by the excavation of the newly built tunnel on the existing tunnel; Based on the unloading pressure information, the entity information of the equivalent entity, the existing tunnel information and the deformation prediction model, the vertical deformation results corresponding to multiple points in the existing tunnel are determined, wherein the equivalent entity represents an entity constructed according to the existing tunnel and the soil corresponding to the existing tunnel.

2. The method according to claim 1, characterized in that The newly built tunnel information includes segment geometry information, segment weight information, equipment information and second distance information; the soil information includes soil weight information and strain information; the existing tunnel information includes first distance information; the distance relationship information represents the shortest distance information between multiple target points in the newly built tunnel and the intersection of the existing tunnel and the newly built tunnel; Building a stress model based on the soil information, the existing tunnel information, the newly built tunnel information and the tunnel relationship information to determine the unloading pressure information generated by the excavation of the newly built tunnel on the existing tunnel includes: Determine release load information by using the soil weight information, the equipment information, the segment geometry information, the segment weight information and the update parameter, wherein the release load information represents the difference between the unit excavation soil weight corresponding to the newly built tunnel and the weight of the newly built tunnel segment; constructing the stress model based on the released load information, the strain information, the first distance information, the second distance information, the angle information, the distance relationship information and the conversion information; The unloading pressure information is determined using the stress model.

3. The method according to claim 2, characterized in that Determining the release load information by using the soil weight information, the equipment information, the segment geometry information, the segment weight information and the update parameter includes: Determining initial release load information corresponding to excavation of the new tunnel based on the soil weight information, the equipment information, the segment geometry information and the segment weight information; The initial released load information is updated by using the updated parameter to obtain the released load information, wherein the updated parameter is determined based on the existing tunnel information.

4. The method according to claim 3, characterized in that The existing tunnel information also includes existing tunnel geometry information, and the method further includes: Determining a ratio between the first distance information and the existing tunnel geometry information; The update parameter is determined based on a difference between the ratio and a preset ratio threshold.

5. The method according to claim 2, characterized in that: The conversion information includes a coordinate conversion relationship and a first conversion coefficient; The method further comprises: Determining the coordinate transformation relationship according to the angle between the horizontal projection of the existing tunnel and the horizontal projection of the newly built tunnel; The first conversion coefficient is determined by using the angle, the coordinate conversion relationship, the first distance information, and the second distance information.

6. The method according to claim 2, characterized in that Determining the unloading pressure information using the stress model includes: Determine a reference point corresponding to the point, wherein the reference point is a plurality of associated points corresponding to the point; The stress model is used to determine the reference unloading pressure information of the reference point.

7. The method according to claim 2, characterized in that The entity information includes entity elastic modulus and section inertia moment; Based on the reference unloading pressure information, the entity information of the equivalent entity, the existing tunnel information and the deformation prediction model, vertical deformation results corresponding to multiple points in the existing tunnel are determined, including: Constructing the deformation prediction model based on the reference point information, the reference unloading pressure information and the existing tunnel information; Determining bending stiffness information corresponding to the equivalent entity using the entity elastic modulus and the section inertia moment; The bending stiffness information, the second conversion coefficient and the foundation information are input into the deformation prediction model to obtain the vertical deformation result, wherein the foundation information represents the foundation bed coefficient of the existing tunnel.

8. The method according to claim 7, characterized in that The soil information includes the soil elastic modulus, and the foundation information is determined by the following operations: The foundation information is determined using the flexural stiffness information, the soil elastic modulus, the strain information and the existing tunnel geometry information.

9. The method according to claim 8, characterized in that The soil information also includes shear stiffness information. The second conversion coefficient can be determined by the following operation: The second conversion coefficient is determined using the shear stiffness information, the foundation information, the existing tunnel geometry information and the bending stiffness information.

10. A prediction device for deformation of an existing tunnel caused by overpass tunnel excavation, characterized in that: The device comprises: An information acquisition module, used to acquire new tunnel information, soil information corresponding to the new tunnel, existing tunnel information and tunnel relationship information, wherein the tunnel relationship information includes angle information, distance relationship information and conversion information between the new tunnel and the existing tunnel; A stress model building module, used to build a stress model based on the soil information, the existing tunnel information, the new tunnel information and the tunnel relationship information, and use the stress model to determine the unloading pressure information generated by the excavation of the new tunnel on the existing tunnel; A vertical deformation result determination module is used to determine the vertical deformation results corresponding to multiple points in the existing tunnel based on the unloading pressure information, the entity information of the equivalent entity, the existing tunnel information and the deformation prediction model, wherein the equivalent entity represents an entity constructed according to the existing tunnel and the soil corresponding to the existing tunnel.

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