Method for designing seismic well of high-speed railway seismic monitoring and early warning system

Abstract

The invention provides a design method of a seismic well of a high-speed railway seismic monitoring and early warning system, which relates to the technical field of railway seismic monitoring and comprises the following steps: acquiring a Boltzmann curve expression; deriving the Boltzmann curve expression to obtain a slope expression of the Boltzmann curve; solving the slope expression of the Boltzmann curve based on a preset anti-trigonometric function to obtain a dip angle critical position expression under the fault action; solving is carried out according to the dip angle critical position expression under the fault action and a preset fault disc tilt angle, and the influence distance under the fault action is obtained; and setting the position of the seismic well according to the influence distance under the fault action. According to the invention, the problem of inaccurate monitoring data of the seismograph caused by dislocation of the tunnel and movement or inclination of the seismograph due to long-term movement of the earth crust and tiny change of the tunnel structure is solved, and the operation safety of the railway is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of railway earthquake monitoring, and in particular to a method for designing a seismic well of a high-speed railway earthquake monitoring and early warning system. Background Art

[0002] In railway monitoring and early warning technology, seismometers are generally set up along the railway to monitor and warn of seismic waves through seismometers. However, due to long-term crustal movement and slight changes in tunnel structure, the tunnel is displaced, and the seismometer moves or tilts accordingly, resulting in inaccurate seismometer monitoring data information. Therefore, a method for designing seismic wells for high-speed railway earthquake monitoring and early warning system is urgently needed to solve the problem that due to long-term crustal movement and slight changes in tunnel structure, the tunnel is displaced, and the seismometer moves or tilts accordingly, resulting in inaccurate seismometer monitoring data information, thereby ensuring the safety of railway operation. Summary of the invention

[0003] The purpose of the present invention is to provide a method for designing a seismic well for a high-speed railway seismic monitoring and early warning system to improve the above-mentioned problem. In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows:

[0004] In a first aspect, the present application provides a method for designing a seismic well for a high-speed railway earthquake monitoring and early warning system, comprising:

[0005] Obtain the distance between the end face and the tunnel entrance and the extreme value of tunnel displacement during fault movement;

[0006] The Boltzmann curve expression is obtained by constructing the distance between the end face and the tunnel opening, the tunnel displacement extreme value during the fault dislocation process, and the midpoint of the preset monitoring area;

[0007] Derivative the Boltzmann curve expression to obtain a slope expression of the Boltzmann curve;

[0008] Solving the slope expression of the Boltzmann curve based on a preset inverse trigonometric function to obtain an expression for the critical position of the dip angle under the action of fault dislocation;

[0009] The influence distance under the fault dislocation is obtained by solving the critical position expression of the dip angle under the fault dislocation and the preset fault disk tilt angle;

[0010] The position of the seismic well is set according to the influence distance under the effect of the fault dislocation.

[0011] The beneficial effects of the present invention are:

[0012] The present invention introduces the slope expression of the Boltzmann curve, calculates the tunnel displacement information through the slope expression of the Boltzmann curve and the inverse trigonometric function, obtains the critical position expression of the inclination angle under the action of fault dislocation, obtains the influence distance under the action of fault dislocation according to the critical position expression of the inclination angle under the action of fault dislocation and the inclination angle of the fault disk, and sets the monitoring and early warning system according to the influence distance under the action of fault dislocation, thereby solving the problem of inaccurate monitoring data of the seismograph caused by the displacement of the tunnel due to long-term crustal movement and slight changes in the tunnel structure, and the subsequent movement or tilt of the seismograph.

[0013] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by implementing the embodiments of the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a schematic diagram of the flow of the seismic well design method of the high-speed railway earthquake monitoring and early warning system described in an embodiment of the present invention. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0018] Embodiment 1:

[0019] This embodiment provides a method for designing seismic wells for a high-speed railway earthquake monitoring and early warning system.

[0020] See also Figure 1 , the figure shows that the method includes steps S1 to S6, including:

[0021] S1: Obtain the distance between the end face and the tunnel entrance and the extreme value of tunnel displacement during fault movement;

[0022] S2: constructing a Boltzmann curve expression based on the distance between the end face and the tunnel entrance, the tunnel displacement extreme value during the fault dislocation process, and the midpoint of the preset monitoring area;

[0023] In this step, the Boltzmann curve expression is:

[0024]

[0025] In the above formula: y represents the expression of the Boltzmann curve, A1 represents the minimum displacement of the tunnel during the fault slip, A2 represents the maximum displacement of the tunnel during the fault slip, e represents the natural constant, x represents the distance between the end face and the tunnel entrance, x0 represents the midpoint of the monitoring area, and t represents the slope control constant of the curve.

[0026] S3: Deriving the Boltzmann curve expression to obtain a slope expression of the Boltzmann curve;

[0027] In this step, the slope of the Boltzmann curve is expressed as:

[0028]

[0029] In the above formula (2): ′ represents the slope of the Boltzmann curve, A1 represents the minimum displacement of the tunnel during the fault slip, A2 represents the maximum displacement of the tunnel during the fault slip, e represents the natural constant, x represents the distance between the end face and the tunnel entrance, x0 represents the midpoint of the monitoring area, and t represents the slope control constant of the curve.

[0030] S4: solving the slope expression of the Boltzmann curve based on a preset inverse trigonometric function to obtain an expression for a critical position of the dip angle under the action of fault dislocation;

[0031] In order to clarify the specific method of obtaining the critical position expression of the dip angle under the action of fault dislocation, step S4 includes S41 to S46, which are specifically:

[0032] S41: converting the slope of the Boltzmann curve to obtain a calculation formula for the tilt angle of the lining;

[0033] In this step, the calculation formula for the tilt angle of the lining is:

[0034]

[0035] In the above formula (3): Indicates the tilt angle of the lining, y ′ represents the slope of the Boltzmann curve, Represents the coefficient for converting radians to degrees, and arctan represents the inverse tangent function.

[0036] S42: constructing a limit state equation under the constraint of the tilt angle based on the preset optimal position and the tilt angle calculation formula of the lining;

[0037] In order to clarify the specific method of obtaining the limit state equation under the tilt angle constraint, step S42 includes S421 to S425, which are:

[0038] S421: Acquire multiple strong seismometers;

[0039] S422: Arranging a plurality of strong motion sensors equidistantly within the monitoring area;

[0040] S423: monitoring the angle of each strong motion seismometer during the action of the dislocation fault to obtain the tilt angle of each strong motion seismometer;

[0041] S424: judging the tilt angle of each strong motion seismograph according to a preset tilt threshold, and obtaining a judgment result, wherein: if the tilt angle of the strong motion seismograph is greater than the tilt threshold, it is an area disturbed by fault movement; if the tilt angle of the strong motion seismograph is less than or equal to the tilt threshold, it is a stable area;

[0042] Preferably, the tilt threshold is 0.5°.

[0043] S425: Setting a preset seismic well in the stable area to obtain an optimal position of the seismic well.

[0044] S43: constructing a limit state equation under the tilt angle constraint and the slope of the Boltzmann curve to obtain a slope expression of the curve under the limit state;

[0045] In this step, the slope expression of the curve under the limit state is:

[0046]

[0047] In the above formula (4): Represents the slope of the curve at the limit state, y ′ represents the slope of the Boltzmann curve, It represents the coefficient for converting radians into angles, arctan represents the inverse tangent function, and 0.5° represents the tilt threshold.

[0048] S44: constructing a Boltzmann function equation according to a preset first-order derivative function equation and a slope expression of the curve under the limit state;

[0049] In this step, the Boltzmann function equation is:

[0050]

[0051] In the above formula (5), A1 represents the minimum displacement of the tunnel during the fault slip, A2 represents the maximum displacement of the tunnel during the fault slip, e represents a natural constant, x represents the distance between the end face and the tunnel entrance, x0 represents the midpoint of the monitoring area, t represents the slope control constant of the curve, and 0.0087 represents the slope value of the Boltzmann curve.

[0052] S45: Solving the Boltzmann function equation based on a preset substitution method to obtain a substitution optimization formula;

[0053] In order to clarify the specific method of obtaining the substitution optimization formula, step S45 includes S451 to S453, which are:

[0054] S451: constructing the Boltzmann function equation based on a preset substitution method to obtain a substitution equation;

[0055] In this step, the substitution equation is:

[0056]

[0057] In the above formula (6), 0.0087 represents the slope value of the Boltzmann curve, A1 represents the minimum displacement of the tunnel during the fault slip, A2 represents the maximum displacement of the tunnel during the fault slip, u represents the substitution solution, and t represents the slope control constant of the curve.

[0058] S452: Solving the substitution equation based on a preset root-finding formula for a quadratic equation to obtain a substitution solution expression;

[0059] In this step, the substitution solution expression is:

[0060]

[0061] In the above formula (7), u represents a substitution solution, and a, b and c all represent constants.

[0062] S453: Solving the substitution solution expression based on a preset substitution method to obtain a substitution optimization formula;

[0063] In this step, the substitution optimization formula is:

[0064]

[0065] In the above formula (8), x represents the distance between the end face and the tunnel entrance, x0 represents the midpoint of the monitoring area, t represents the slope control constant of the curve, ln represents the natural logarithm, and u represents the substitution solution.

[0066] S46: Solving the substitution optimization formula based on a preset substitution method to obtain an expression for the critical position of the dip angle under the action of fault dislocation.

[0067] In this step, the critical position expression of the dip angle under the action of the fault dislocation is:

[0068] x ′ =x0+tlnu (9)

[0069] In the above formula (9): x ′ represents the critical position of the dip angle under the action of fault dislocation, x0 represents the midpoint of the monitoring area, t represents the slope control constant of the curve, ln represents the natural logarithm, and u represents the substitution solution.

[0070] S5: solving the critical position expression of the dip angle under the fault dislocation and the preset fault disk tilt angle to obtain the influence distance under the fault dislocation;

[0071] In order to clarify the specific method of obtaining the influence distance under the action of fault dislocation, step S5 includes S51 to S53, which are specifically:

[0072] S51: solving the tilt angle of the upper plate of the fault according to the critical position expression of the tilt angle under the action of the fault dislocation, and obtaining the first fault zone distance;

[0073] In this step, the first fault zone distance is S1. Preferably, the tilt angle of the upper plate of the fault is 0.5°.

[0074] S52: solving the tilt angle of the fault footwall according to the critical position expression of the tilt angle under the action of the fault dislocation to obtain the distance of the second fault zone;

[0075] In this step, the second fault zone distance is S2. Preferably, the tilt angle of the fault footwall is 0.5°.

[0076] S53: constructing according to the first fault zone distance and the second fault zone distance to obtain the influence distance under the action of fault dislocation.

[0077] In this step, the influence distance under the fault dislocation action represents the distance from the first fault zone distance S1 to the second fault zone distance S2.

[0078] S6: Setting the position of the seismic well according to the influence distance under the fault dislocation effect.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0080] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for designing seismic wells for a high-speed railway earthquake monitoring and early warning system, characterized in that: include: Obtain the distance between the end face and the tunnel entrance and the extreme value of tunnel displacement during fault movement; The Boltzmann curve expression is obtained by constructing the distance between the end face and the tunnel opening, the tunnel displacement extreme value during the fault dislocation process, and the midpoint of the preset monitoring area; Derivative the Boltzmann curve expression to obtain a slope expression of the Boltzmann curve; Solving the slope expression of the Boltzmann curve based on a preset inverse trigonometric function to obtain an expression for the critical position of the dip angle under the action of fault dislocation; The influence distance under the fault dislocation is obtained by solving the critical position expression of the dip angle under the fault dislocation and the preset fault disk tilt angle; The position of the seismic well is set according to the influence distance under the effect of the fault dislocation.

2. The method for designing seismic wells for a high-speed railway earthquake monitoring and early warning system according to claim 1, characterized in that the slope of the Boltzmann curve is expressed as: In the above formula: y ′ represents the slope of the Boltzmann curve, A1 represents the minimum displacement of the tunnel during the fault slip, A2 represents the maximum displacement of the tunnel during the fault slip, e represents the natural constant, x represents the distance between the end face and the tunnel entrance, x0 represents the midpoint of the monitoring area, and t represents the slope control constant of the curve.

3. The method for designing seismic wells for a high-speed railway earthquake monitoring and early warning system according to claim 1, characterized in that the critical position expression of the dip angle under the action of fault dislocation is: x ′ =x0+tlnu In the above formula: x ′ represents the critical position of the dip angle under the action of fault dislocation, x0 represents the midpoint of the monitoring area, t represents the slope control constant of the curve, ln represents the natural logarithm, and u represents the substitution solution.

4. The method for designing seismic wells for a high-speed railway earthquake monitoring and early warning system according to claim 1 is characterized in that the slope expression of the Boltzmann curve is solved based on a preset inverse trigonometric function to obtain an expression for the critical position of the dip angle under the action of fault dislocation, including: The slope of the Boltzmann curve is converted to obtain a calculation formula for the tilt angle of the lining; Based on the preset optimal position and the calculation formula of the tilt angle of the lining, a limit state equation under the tilt angle constraint is obtained; Based on the limit state equation under the tilt angle constraint and the slope of the Boltzmann curve, an expression for the slope of the curve under the limit state is obtained; The Boltzmann function equation is obtained by constructing the equation according to the preset first-order derivative function equation and the slope expression of the curve under the limit state; Solving the Boltzmann function equation based on a preset substitution method to obtain a substitution optimization formula; The substitution optimization formula is solved based on the preset substitution method to obtain the critical position expression of the dip angle under the action of fault dislocation.

5. The method for designing seismic wells for a high-speed railway earthquake monitoring and early warning system according to claim 4, characterized in that the preset optimal position includes: Acquire multiple strong motion sensors; Arrange a plurality of strong motion sensors at equal intervals within the monitoring area; Based on monitoring the angle of each strong motion seismometer during the action of the dislocation fault, the tilt angle of each strong motion seismometer is obtained; The tilt angle of each strong motion seismometer is judged according to a preset tilt threshold value to obtain a judgment result, wherein: if the tilt angle of the strong motion seismometer is greater than the tilt threshold value, it is an area disturbed by fault movement; if the tilt angle of the strong motion seismometer is less than or equal to the tilt threshold value, it is a stable area; The preset seismic well is set in the stable area to obtain the optimal position of the seismic well.

6. The method for designing seismic wells for a high-speed railway earthquake monitoring and early warning system according to claim 4, characterized in that the Boltzmann function equation is solved based on a preset substitution method to obtain a substitution optimization formula; The Boltzmann function equation is constructed based on a preset substitution method to obtain a substitution equation; Solving the substitution equation based on a preset root-finding formula for a quadratic equation to obtain a substitution solution expression; The substitution solution expression is solved based on a preset substitution method to obtain a substitution optimization formula.

7. The method for designing seismic wells for a high-speed railway earthquake monitoring and early warning system according to claim 6, characterized in that the substitution solution expression is: In the above formula: u represents a substitution solution, and a, b and c are all constants.

8. The method for designing seismic wells for a high-speed railway earthquake monitoring and early warning system according to claim 4, characterized in that the calculation formula for the tilt angle of the lining is: In the above formula: Indicates the tilt angle of the lining, y ′ represents the slope of the Boltzmann curve, Represents the coefficient for converting radians to degrees, and arctan represents the inverse tangent function.

9. The method for designing seismic wells for a high-speed railway earthquake monitoring and early warning system according to claim 4, characterized in that the Boltzmann function equation is: In the above formula: A1 represents the minimum displacement of the tunnel during the fault slip, A2 represents the maximum displacement of the tunnel during the fault slip, e represents the natural constant, x represents the distance between the end face and the tunnel entrance, x0 represents the midpoint of the monitoring area, t represents the slope control constant of the curve, and 0.0087 represents the slope value of the Boltzmann curve.

10. The method for designing seismic wells for a high-speed railway earthquake monitoring and early warning system according to claim 1 is characterized in that the fault plate tilt angle includes the fault upper plate tilt angle and the fault lower plate tilt angle, and the influence distance under the fault dislocation is obtained by solving the critical position expression of the tilt angle under the action of the fault dislocation and the preset fault plate tilt angle, including: The tilt angle of the upper plate of the fault is solved according to the critical position expression of the tilt angle under the action of the fault dislocation to obtain the distance of the first fault zone; The tilt angle of the footwall of the fault is solved according to the critical position expression of the tilt angle under the action of the fault dislocation to obtain the distance of the second fault zone; The influence distance under the action of fault dislocation is obtained by constructing the first fault zone distance and the second fault zone distance.

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