A quick design method of debris flow check dam based on motion energy analysis

Abstract

The present application relates to a kind of mudslide dam based on the quick design method of motion energy analysis, comprising the following steps: step S1: according to the situation of geological exploration, preliminary selection n dam arrangement position, corresponding n kinds of working conditions, subsequent analysis is carried out according to each working condition;Step S2: the motion process of mudslide is simulated using SPH method, flexible disaster mitigation measures are applied, and the retarding effect of dam on mudslide is simulated using virtual wall particle;Step S3: calculate the impact characteristic parameter of mudslide, including the impact time Δ t Of leading head, impact average speed, the length L Of leading head, the volume Vol head Of leading head, impact load size Load impact ;Step S4: calculate the design characteristic parameter of dam, obtain the cross section design characteristic parameter of dam under different downstream slope, including dam height H , dam top length L T , dam top width W T , dam bottom length L B And dam bottom width W B This method can realize the quick design of dam characteristic size.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of geological disaster analysis simulation, and particularly relates to a rapid design method of a debris flow blocking dam based on motion energy analysis. BACKGROUND

[0002] In the construction of a debris flow defense engineering system, a blocking system combining flexible disaster mitigation technology and a blocking dam is considered as an effective disaster mitigation means. Reasonable optimization arrangement of different disaster mitigation technologies has a significant influence on disaster mitigation effect and engineering investment. However, in the design of the blocking system combining the flexible disaster mitigation technology and the blocking dam, the existing analysis means cannot efficiently determine the structure size of the blocking dam according to the blocking effect of the flexible disaster mitigation measures, which affects the optimization design and performance improvement of the disaster blocking system. SUMMARY

[0003] The present application aims to provide a rapid design method of a debris flow blocking dam based on motion energy analysis, which can realize rapid design of the characteristic size of the blocking dam.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: a rapid design method of a debris flow blocking dam based on motion energy analysis, comprising the following steps:

[0005] Step S1: according to the geological exploration condition, initially selecting n blocking dam arrangement positions, corresponding to n working conditions, and then analyzing each working condition;

[0006] Step S2: applying the SPH method to simulate the motion process of the debris flow, exerting the action of the flexible disaster mitigation measures, and using virtual wall particles to simulate the blocking effect of the blocking dam on the debris flow;

[0007] Step S3: calculating the impact characteristic parameters of the debris flow, including the impact action time Δ t of the head, the impact average speed , the head length L , the head volume Vol head , and the impact load size Load impact ;

[0008] Step S4: calculating the design characteristic parameters of the blocking dam to obtain the cross-section design characteristic parameters of the blocking dam under different downstream slopes, including the dam height H , the dam top length L T , the dam top width W T , the dam bottom length L B , and the dam bottom width W B .

[0009] Further, the step S2 specifically comprises the following steps:

[0010] S201, assuming that the number of SPH particles is i , the number of virtual particles is j , the distance between the debris flow SPH particles and the virtual particles is calculated:

[0011] (1)

[0012] wherein, dis ( i , j ) is the distance between the particle i and the particle j ; X_p (:,:, i ) is the coordinate of the SPH particle i ; X_vp (:,:, j ) is the coordinate of the virtual particle j ;

[0013] S202, according to the distance between the SPH particles and the virtual particles, it is judged whether the debris flow particles need to be treated by the blocking effect:

[0014] (2)

[0015] wherein, f_vn ( i ) is a characterization variable of whether the debris flow particles are treated by the blocking effect, and the value of 1 is treated, and the value of 0 is not treated; fact is the amplification coefficient of the influence radius of the virtual particle; IFlenth is the influence radius of the virtual particle;

[0016] S203, the debris flow SPH particles with the blocking effect treatment characterization variable of 1 are subjected to the blocking effect, assuming that the i number of particles needs to be subjected to the blocking effect, then:

[0017] (3)

[0018] wherein, v (:,:, i ) is the particle velocity before the blocking effect is applied; vec (:,:) is the unit direction vector of the blocking dam axis; v *(:,:, i ) is the particle velocity after the blocking effect is applied.

[0019] Further, in step S3, the time interval from when the debris flow head portion SPH particles start to be affected by the virtual particles of the retaining dam to when the maximum velocity of the debris flow head portion SPH particles is less than 1*10 -2 m / s is taken as the impact time Δ t of the head; the length of the debris flow head portion when the debris flow head portion SPH particles start to be affected by the virtual particles of the retaining dam is taken as the head length L ; the average velocity of the debris flow head portion particles is taken as the average impact velocity ; and the head volume Vol head is calculated by the control section method or the cone approximation method; and the impact load size Vol head is calculated based on the head volume Load impact .

[0020] Further, the calculation method of the control section method is as follows:

[0021] The debris flow head position is divided into m control sections with equal intervals, wherein the first section is the head of the head, and the mth section is the tail of the head, and the interval between each control section is Δ L = L / ( m -1), the head volume Vol head is calculated by the following formula:

[0022] (4)

[0023] wherein, Asec i is the area of the ith control section.

[0024] Further, the calculation method of the cone approximation method is as follows:

[0025] The debris flow head position is divided into m control sections with equal intervals, wherein the first section is the head of the head, and the mth section is the tail of the head, and the interval between each control section is Δ L = L / ( m -1), the head volume Vol head is calculated by the following formula:

[0026] (5)

[0027] wherein, r2, rm m respectively represent the equivalent radii of the debris flow widths of the second and mth control sections.

[0028] Further, based on the head volumeVol head The impact load size is calculated according to Newton's second law of motion Load impact :

[0029] (6)

[0030] wherein, M is the mass of the debris flow head, dv / dt is the acceleration size of the head under the blocking action, ρ is the debris flow density.

[0031] Further, the step S4 specifically comprises the following steps:

[0032] S401, selecting a safety factor K , calculating the size of the self-weight required by the blocking dam G :

[0033] (7)

[0034] wherein, μ is the base friction coefficient;

[0035] S402, calculating the volume of the blocking dam V :

[0036] (8)

[0037] wherein, ρ dam is the density of the dam building material of the blocking dam;

[0038] S403, calculating the cross-section design characteristic parameter of the blocking dam; according to the blocking action of the blocking dam on the debris flow by using the virtual wall particles, the maximum accumulation height of the debris flow is H dep , the dam height of the blocking dam is H :

[0039] (9)

[0040] wherein, MAX ( ) is a maximum value operator, that is, the dam height of the blocking dam H is taken as 1.05 times of H dep and H dep the larger value in +1;

[0041] Through the dam height of the blocking dam H , the length of the dam top is obtained in combination with the topographic conditions of the blocking dam arrangement position LT , and the length of the dam bottom L B ; the downstream slope angle of the dam is given as θ , the width of the dam bottom W B is calculated by the following formula:

[0042] (10)

[0043] the width of the dam top W T is calculated by the following formula:

[0044] (11).

[0045] The application further provides a rapid design system of a debris flow blocking dam, comprising a memory, a processor and computer program instructions stored in the memory and capable of being executed by the processor, and when the processor executes the computer program instructions, the above method can be realized.

[0046] The application further provides a computer readable storage medium, wherein computer program instructions are stored in the computer readable storage medium, and when the computer program instructions are executed by a processor, the above method is realized.

[0047] Compared with the prior art, the application has the following beneficial effects: the application provides a rapid design method of a debris flow blocking dam based on motion energy analysis, aiming at the problem that in the design of a blocking system combining a flexible disaster reduction technology and a blocking dam, the structure size of the blocking dam cannot be efficiently determined according to the blocking effect of the flexible disaster reduction measure, the method obtains effective characterization of impact energy and impact force of a debris flow head by combining dynamic process simulation and impact energy analysis, and on this basis, the rapid design of the characteristic size of the blocking dam is realized by combining energy analysis, field topography and construction conditions. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 is a flow chart of the rapid design method of the debris flow blocking dam provided by the embodiment of the application;

[0049] Figure 2 is a schematic diagram of a volume control cross section of a debris flow head in the embodiment of the application;

[0050] Figure 3 is a schematic diagram of characteristic parameters of cross section design of a blocking dam in the embodiment of the application. DETAILED DESCRIPTION

[0051] The application will be further described below with reference to the drawings and embodiments.

[0052] It should be noted that the following detailed description is exemplary in nature and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0053] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0054] As shown in Figure 1 , the embodiment provides a quick design method of debris flow blocking dam based on motion energy analysis, comprising the following steps:

[0055] Step S1: According to the geological exploration situation, initially select n blocking dam arrangement positions, corresponding to n working conditions, and then analyze each working condition.

[0056] Step S2: Apply SPH method to simulate the motion process of debris flow, apply flexible disaster mitigation measures, and use virtual wall particles to simulate the blocking effect of debris flow.

[0057] In the embodiment, step S2 specifically comprises the following steps:

[0058] S201, assuming that the SPH particle number is i , the virtual particle number is j , and the distance between the debris flow SPH particle and the virtual particle is calculated:

[0059] (1)

[0060] Wherein, dis ( i , j ) is the distance between the particle i and the particle j ; X_p (:,:, i ) is the coordinate of the SPH particle i ; X_vp (:,:, j ) is the coordinate of the virtual particle j .

[0061] S202, according to the distance between the SPH particle and the virtual particle, judge whether the debris flow particle needs to be handled by the blocking effect:

[0062] (2)

[0063] wherein, f_vn ( i ) is a representation variable of whether the debris flow particle is subjected to the blocking action treatment (its value is 1 for being subjected to the treatment, and 0 for not being subjected to the treatment); fact is an amplification coefficient of the influence radius of the virtual particle, which can generally be taken as 1.5; IFlenth is the influence radius of the virtual particle.

[0064] S203, the debris flow SPH particle subjected to the blocking action treatment is subjected to the blocking action, assuming that the No. i particle needs to be subjected to the blocking action, then there is: i

[0065] (3)

[0066] wherein, v (:,:, i ) is the particle velocity before the blocking action is applied; vec (:,:) is a unit direction vector of the axis of the blocking dam; v *(:,:, i ) is the particle velocity after the blocking action is applied.

[0067] Step S3: calculating the impact characteristic parameters of the debris flow, including the head impact action time Δ t , the impact average speed , the head length L , the head volume Vol head , the impact load size Load impact .

[0068] In the embodiment, the time interval from when the debris flow head part SPH particle starts to be subjected to the blocking dam virtual particle action to when the maximum value of the speed of the debris flow head part SPH particle is less than 1*10 -2 m / s is taken as the head impact action time Δ t ; the length of the debris flow head part when the debris flow head part SPH particle starts to be subjected to the blocking dam virtual particle action is taken as the head length L ; the average speed of the debris flow head part particle is taken as the impact average speed ; the head volume Vol head is calculated by the control section method or the cone approximation method; the impact load size Vol head is calculated based on the head volume Load impact .

[0069] ​The calculation method of the control section method is as follows:

[0070] The mudslide head position is divided into m control sections with equal intervals (1# section is the head of the head, and m# section is the tail of the head), and the interval between each control section is Δ L = L / ( m -1), the volume of the head Vol head The calculation is as follows:

[0071] (4)

[0072] wherein, Asec i is the area of the i# control section.

[0073] The calculation method of the control section method is as follows:

[0074] The mudslide head position is divided into m control sections with equal intervals (1# section is the head of the head, and m# section is the tail of the head), and the interval between each control section is Δ L = L / ( m -1), the volume of the head Vol head The calculation is as follows:

[0075] (5)

[0076] wherein, r2, r m respectively represent the equivalent radii of the 2# and m# control section mudslide widths, and here the half of the length is taken.

[0077] Based on the volume of the head Vol head , the impact load size is calculated according to Newton's second law of motion Load impact :

[0078] (6)

[0079] wherein, M is the mass of the mudslide head, dv / dt is the acceleration size of the head under the blocking action, ρ is the density of the mudslide.

[0080] Step S4: Calculate the design characteristic parameters of the blocking dam, and obtain the design characteristic parameters of the blocking dam section under different downstream slopes, including the dam height H , the dam top length L TDam crest length W T Dam base length L B Dam base width W B .

[0081] In the present embodiment, step S4 specifically comprises the following steps:

[0082] S401, select a safety factor K , calculate the size of the self-weight required by the retaining dam G :

[0083] (7)

[0084] wherein, μ is the base friction coefficient, taking a value of 0.6-0.7.

[0085] S402, calculate the volume of the retaining dam V :

[0086] (8)

[0087] wherein, ρ dam is the density of the retaining dam construction material.

[0088] S403, calculate the cross-sectional design characteristic parameters of the retaining dam. According to the retarding effect of the retaining dam on the debris flow after the virtual wall particles are applied, the maximum accumulation height of the debris flow is H dep , the dam height of the retaining dam H is taken as:

[0089] (9)

[0090] wherein, MAX is the maximum value operator, i.e. the dam height of the retaining dam H is taken as 1.05 times of H dep and H dep +1.

[0091] Through the dam height of the retaining dam H , combined with the topographic conditions of the retaining dam layout position, the dam crest length L T and the dam base length L B are obtained; given the downstream slope angle of the retaining dam as θ , the dam base width W B is calculated by the following formula:

[0092] (10)

[0093] Dam crest width W T is calculated by the following formula:

[0094] (11).

[0095] The implementation process of the method will be further described below by taking a specific mudflow flexible disaster mitigation facility and barrier dam combined system as an example.

[0096] Step S1: According to the geological exploration situation, initially select n=5 barrier dam arrangement positions, corresponding to n=5 working conditions, and here take n=1 working condition as an example for analysis, and the calculation method of other working conditions is the same.

[0097] Step S2: Apply the SPH method to simulate the movement process of the mudflow, apply the flexible disaster mitigation measures, and use virtual wall particles to simulate the blocking effect of the barrier dam on the mudflow; specifically including the following steps:

[0098] ① Calculate the distance between the SPH particles of the mudflow and the virtual particles, assuming that the SPH particle number is i =200, and the virtual particle number is j =1001:

[0099] (1)

[0100] wherein, dis (200,1001) is the distance between the particle i and the particle j ; X_p (:,:,200) is the coordinate of the SPH particle i ; X_vp (:,:,1001) is the coordinate of the virtual particle j .

[0101] ② Judge the distance between each SPH particle and the virtual particle:

[0102] Because: , so: (2)

[0103] wherein, f_vn (200) is a representation variable (1 for processing, 0 for not processing) of whether to perform the blocking effect treatment on the mudflow particles, fact =1.5m is the amplification coefficient of the influence radius of the virtual particle, IFlenth =0.8m is the influence radius of the virtual particle.

[0104] ③ The debris flow SPH particle with a treatment variable of 1 is subjected to the blocking effect, and the 200th particle needs to be subjected to the blocking effect, and: i

[0105] (3)

[0106] wherein, v (:,:, i )=(3,4) is the particle velocity before the blocking effect is applied, is the unit direction vector of the blocking dam axis, is the particle velocity after the blocking effect is applied.

[0107] Step S3: Calculate the impact characteristic parameters of the debris flow, including the head impact action time Δ t , the impact average speed , the head length L , the head volume Vol head , the impact load size Load impact . The time interval from when the debris flow head part SPH particle starts to be subjected to the action of the virtual particle of the blocking dam to when the maximum value of the speed of the debris flow head part SPH particle is less than 1*10 -2 m / s is taken as the head impact action time Δ t = 0.25 s . The length of the debris flow head part when the debris flow head part SPH particle starts to be subjected to the action of the virtual particle of the blocking dam is taken as the head length L = 10 m . The head volume Vol head includes the following two calculation methods:

[0108] ① Control section method

[0109] The debris flow head position is divided into m=5 control sections (wherein the 1st section is the head of the head, and the m=5th section is the tail of the head), and the spacing between each control section is Δ L = L / ( m -1) = 2.5m, and the head volume Vol head can be calculated by the following formula:

[0110] (4)

[0111] wherein, Asec i is the area of the i-th control section.

[0112] ​The volume control section of the debris flow head in this embodiment is shown in Figure 2 . Figure 2 In this embodiment, S1-S5 represent the first to fifth control sections, Asec 2 Asec 5 represent the areas of the second to fifth control sections.

[0113] ② Spine body approximation method

[0114] The debris flow head position is divided into m=5 equidistant control sections (wherein the first section is the head of the head, and the m=5 section is the tail of the head), and the distance between each control section is Δ L = L / ( m -1) = 2.5m, and the volume of the head Vol head can be calculated by the following formula:

[0115] (5)

[0116] wherein r i represents the equivalent radius of the debris flow width of the control section, which is taken as the length divided by 3.6.

[0117] Therefore, according to Newton's second law of motion, the impact load size Load impact can be obtained:

[0118] (6)

[0119] wherein the average impact velocity , and the debris flow density . The subsequent calculation is performed by using the obtained by method ②.

[0120] Step S4: Calculate the design characteristic parameters of the retaining dam, and obtain the retaining dam section design characteristic parameters under different downstream slopes, including dam height H , dam top length L T , dam top width W T , dam bottom length L B , and dam bottom width W B ; specifically including the following steps:

[0121] ① According to the selected safety factor K =1.2, calculate the required self-weight size of the retaining dam: G

[0122] (7)​

[0123] wherein, μ is the base friction coefficient, which is 0.6.

[0124] ② Calculate the volume of the retaining dam V :

[0125] (8)

[0126] wherein, the density of the retaining dam building material .

[0127] ③ Calculate the cross-section design characteristic parameters of the retaining dam. After the virtual wall particles are used to exert the retarding effect of the retaining dam on the debris flow, the maximum deposition height of the debris flow is H dep = 8 m, and the dam height of the retaining dam H may be taken as:

[0128] (9)

[0129] wherein, MAX is the maximum value operator, that is, the dam height of the retaining dam H is taken as 1.05 times of H dep and the larger value in H dep + 1.

[0130] Through the dam height of the retaining dam H , combined with the topographic conditions of the retaining dam layout position, the dam top length L T = 50 m and the dam bottom length L B = 20 m can be obtained. Given that the downstream slope angle of the retaining dam is θ = 60°, the dam bottom width W B can be calculated by the following formula:

[0131] (10)

[0132] The dam top width W T can be calculated by the following formula:

[0133] (11).

[0134] The cross-section design characteristic parameters of the retaining dam designed in this embodiment are shown in Figure 3 .

[0135] The embodiment also provides a rapid design system of a debris flow blocking dam, comprising a memory, a processor and computer program instructions stored in the memory and capable of being executed by the processor, and when the computer program instructions are executed by the processor, the method described above can be realized.

[0136] The embodiment also provides a computer readable storage medium, wherein computer program instructions are stored in the computer readable storage medium, and when the computer program instructions are executed by a processor, the method described above is realized.

[0137] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system or a computer program product. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROMs, optical storage devices, etc.) containing computer-usable program code.

[0138] The present application is described with reference to flowcharts and / or block diagrams according to the methods, devices (systems) and computer program products of the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing devices to produce a machine, so that the instructions executed by the computer or other programmable data processing devices generate a device that implements the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in one or more flows and / or blocks Figure 1 The functions specified in one or more flows and / or blocks

[0139] These computer program instructions can also be stored in a computer readable memory capable of guiding a computer or other programmable data processing device to work in a specific way, so that the instructions stored in the computer readable memory produce a product comprising instruction devices, which implement the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in one or more flows and / or blocks Figure 1 The functions specified in one or more flows and / or blocks

[0140] These computer program instructions can also be loaded into a computer or other programmable data processing device, so that a series of operation steps are performed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide a process for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in one or more flows and / or blocks Figure 1 The functions specified in one or more flows and / or blocks

[0141] The above descriptions are only the preferred embodiments of the present application, not intended to limit the present application in other forms. Any person skilled in the art can make changes or modifications to the equivalent embodiments with the disclosed technical contents. However, any simple modification, equivalent change and modification made to the above embodiments without departing from the technical solution content of the present application and according to the technical essence of the present application still belongs to the protection scope of the present application.

Claims

1. A quick design method of debris flow barrier based on motion energy analysis, characterized in that, The method comprises the following steps: Step S1: According to the geological exploration situation, the positions of the n barrier dams are selected, and n working conditions are set, and then each working condition is analyzed; Step S2: The movement process of the debris flow is simulated by using the SPH method, the flexible disaster mitigation measures are applied, and the virtual wall particles are used to simulate the blocking effect of the barrier dam on the debris flow; Step S3: Calculate the characteristic parameters of debris flow impact, including the impact time of the head Δt, the average impact speed , the length of the head L, the volume of the head Vol head , the impact load Load impact ; Step S4: calculating the design characteristic parameters of the check dam, to obtain the design characteristic parameters of the check dam cross section under different downstream slopes, including dam height H, dam top length L T , dam top width W T , dam bottom length L B , and dam bottom width W B ; Step S2 specifically comprises the following steps: S201, assuming that the SPH particle number is i, and the virtual particle number is j, the distance between the debris flow SPH particle and the virtual particle is calculated: （1） Wherein, dis(i,j) is the distance between the particle i and the particle j; X_p(:,:,i) is the coordinate of the SPH particle i; X_vp(:,:,j) is the coordinate of the virtual particle j; S202, according to the distance between the SPH particle and the virtual particle, it is judged whether the debris flow particle needs to be handled by the blocking effect: （2） Wherein, f_vn(i) is a characteristic variable of whether the debris flow particle is handled by the blocking effect, which takes 1 for processing and 0 for not processing; fact is the amplification coefficient of the influence radius of the virtual particle; IFlenth is the influence radius of the virtual particle; S203, the debris flow SPH particle with the blocking effect handling characteristic variable of 1 is applied with the blocking effect, assuming that the i-th particle needs to be applied with the blocking effect, then: （3） Wherein, v(:,:,i) is the particle velocity before the blocking effect is applied; vec(:,:) is the unit direction vector of the dam axis; v*(:,:,i) is the particle velocity after the blocking effect is applied.

2. The method according to claim 1, wherein, In step S3, the time interval from when the debris flow head portion SPH particles start to be affected by the virtual particles of the retaining dam to when the maximum velocity of the debris flow head portion SPH particles is less than 1*10 -2 m / s is taken as the impact time Δt of the head; the length of the debris flow head portion when the debris flow head portion SPH particles start to be affected by the virtual particles of the retaining dam is taken as the head length L; and the average velocity of the debris flow head portion particles is taken as the average impact velocity V ; the head volume Vol head is calculated by a control section method or a cone approximation method; and the impact load Load head is calculated based on the head volume Vol impact .

3. The method according to claim 2, wherein, The calculation method of the control section method is: The debris flow tap position is divided into m equidistant control sections, wherein the No. 1 section is the tap head, and the No. m section is the tap tail, the interval between each control section is ΔL = L / (m-1), and the tap volume Vol head is calculated by the following formula: （4） where Asec i is the area of the i-th control section.

4. The method according to claim 2, wherein, The calculation method of the vertebral body approximation method is: The debris flow tap position is divided into m equidistant control sections, wherein the No. 1 control section is the tap head, and the No. m control section is the tap tail, the spacing between each control section is ΔL = L / (m-1), and the tap volume Vol head is calculated by the following formula: （5） wherein r2, r m respectively represent the equivalent radii of the 2nd and mth control section of debris flow width.

5. The method according to claim 2, wherein, Based on the volume of the tap Vol head , the impact load size Load impact : （6） Wherein, M is the mass of the debris flow head, dv / dt is the acceleration of the head under the blocking effect, and p is the density of the debris flow.

6. The method according to claim 1, wherein, Step S4 specifically comprises the following steps: S401, select the safety factor K, and calculate the required self-weight G of the barrier dam: （7） Wherein, μ is the base friction coefficient; S402, calculate the volume V of the barrier dam: （8） wherein p dam is the density of the dam material; S403, calculate the design characteristic parameters of the dam section; according to the blocking effect of the virtual wall particle on the debris flow, the maximum accumulation height of the debris flow is H dep The dam height H of the dam is taken as （9） where MAX( ) is the maximum operator, i.e. the dam height H is taken as 1.05 times H dep and H dep the larger of the two values. The dam height H is combined with the terrain condition of the dam arrangement position to obtain the dam top length L T , and the dam bottom length L B ; the dam bottom width W B is calculated by the following formula: （10） Dam crest width W T is calculated from the following equation: （11）。 7. A rapid design system for a debris flow barrier dam, characterized in that, The computer program instructions stored in the memory and capable of being executed by the processor can realize the method of any one of claims 1-6 when the processor executes the computer program instructions.

8. A computer-readable storage medium having stored thereon computer program instructions, wherein, The computer program instructions are executed by the processor to realize the method of any one of claims 1-6.

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