Method, system and equipment for calculating grouting amount of loess roadbed and medium

Abstract

The invention provides a method, a system, equipment and a medium for calculating the grouting amount of a loess roadbed, and relates to the technical field of soil improvement, the method comprises the following steps: obtaining first information and second information, the first information being loess mechanical parameters; the second information is related parameters of the grouting slurry; calculating according to the first information to obtain loess soil body parameters; the loess soil parameters and the second information are input into EDEM software and FLUENT software for bidirectional coupling, and a slurry diffusion area is obtained; calculating according to the slurry diffusion area to obtain the volume of the slurry diffusion area; and calculating according to the volume of the grout diffusion area and the density of the grouting grout to obtain the mass of the grouting grout. According to the method, bidirectional coupling is conducted through FLUENT software and EDEM software, the simulation result of the slurry diffusion area is obtained, the loess roadbed grouting amount is calculated according to the simulation result, theoretical support is provided for grouting amount design, and grouting engineering is more scientific and rigorous.

Description

Technical Field

[0001] The invention relates to the technical field of soil improvement, and in particular to a method, system, equipment and medium for calculating the amount of grouting for a loess roadbed. Background Art

[0002] In its natural state, loess has the characteristics of under-compactness, large pores and collapsibility, which makes loess roadbed prone to settlement. In the prior art, loess roadbed is often reinforced by grouting, but since grouting engineering is a concealed engineering, after grouting, cement slurry will diffuse in the loess soil, and the amount of slurry is usually estimated based on experience. At present, there is still a lack of theoretical support for grouting dosage design. Summary of the invention

[0003] The purpose of the present invention is to provide a method, system, device and medium for calculating the amount of grouting for loess roadbed to solve the above problems. In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0004] In a first aspect, the present application provides a method for calculating the amount of grouting for loess roadbed, comprising:

[0005] Acquire first information and second information, wherein the first information is loess mechanical parameters; the second information includes density, dynamic viscosity, water-cement ratio and grouting pressure of grouting slurry;

[0006] Calculate and obtain loess soil parameters based on the first information;

[0007] The loess soil parameters and second information were input into EDEM software and FLUENT software for bidirectional coupling to obtain the slurry diffusion area;

[0008] Calculate according to the slurry diffusion area to obtain the volume of the slurry diffusion area;

[0009] The mass of the grouting slurry is calculated based on the volume of the slurry diffusion area and the density of the grouting slurry.

[0010] In the second aspect, the present application also proposes a calculation system for the amount of grouting of loess roadbed, comprising:

[0011] An acquisition unit, used to acquire first information and second information, wherein the first information is loess mechanical parameters; the second information includes density, dynamic viscosity, water-cement ratio and grouting pressure of grouting slurry;

[0012] A first calculation unit is used to calculate and obtain loess soil parameters according to the first information;

[0013] A coupling unit is used to input loess soil parameters and second information into EDEM software and perform bidirectional coupling with FLUENT software to obtain the slurry diffusion area;

[0014] A second calculation unit is used to calculate according to the slurry diffusion area to obtain the volume of the slurry diffusion area;

[0015] The third calculation unit is used to calculate the mass of the grouting slurry according to the volume of the slurry diffusion area and the density of the grouting slurry.

[0016] In a third aspect, the present application also provides a device for calculating the amount of grouting used for loess roadbed, including:

[0017] Memory for storing computer programs;

[0018] A processor is used to implement the steps of the method for calculating the amount of grouting for loess roadbed when executing the computer program.

[0019] In a fourth aspect, the present application further provides a method in which the medium is a readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above-mentioned method for calculating the amount of grouting based on loess roadbed are implemented.

[0020] The beneficial effects of the present invention are:

[0021] The present invention performs bidirectional coupling between FLUENT software and EDEM software to obtain simulation results of the slurry diffusion area, and calculates the grouting amount of the loess roadbed according to the simulation results, which provides theoretical support for the grouting amount design and makes the grouting project more scientific and rigorous.

[0022] 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

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. 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.

[0024] Figure 1 It is a schematic flow chart of a method for calculating the amount of grouting for loess roadbed of the present invention;

[0025] Figure 2It is a structural schematic diagram of the calculation system of the loess roadbed grouting amount of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the device for calculating the amount of grouting for loess roadbed of the present invention.

[0027] Markings in the figure:

[0028] 7. Computing system; 710. Acquisition unit; 720. First computing unit; 730. Coupling unit; 740. Second computing unit; 750. Third computing unit; 800. Computing device; 801. Processor; 802. Memory; 803. Multimedia component; 804. I / O interface; 805. Communication component. DETAILED DESCRIPTION

[0029] 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 herein 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.

[0030] 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.

[0031] Embodiment 1:

[0032] like Figure 1 As shown, this embodiment provides a method for calculating the amount of grouting for loess roadbed, which specifically includes step S1, step S2, step S3, step S4 and step S5.

[0033] S1. Obtain first information and second information, wherein the first information is loess mechanical parameters; the second information includes density, dynamic viscosity, water-cement ratio and grouting pressure of grouting slurry.

[0034] In this embodiment, the density of the grouting slurry is 1760 kg / m 3; The dynamic viscosity of the grouting slurry is 0.06kg / (m·s); the water-cement ratio of the grouting slurry is 0.6:1; the grouting pressure is 0.51MPa.

[0035] It should be noted that the loess mechanical parameters include the elastic modulus, Poisson's ratio, cohesion and internal friction angle between loess particles.

[0036] The values ​​of loess mechanical parameters in this embodiment are shown in the following table:

[0037] Table 1

[0038] The symbols in brackets in Table 1 indicate the units of the corresponding parameters.

[0039] S2. Calculate and obtain loess soil parameters based on the first information.

[0040] Specifically, step S2 includes step S21, step S22 and step S23.

[0041] S21. According to the elastic modulus and Poisson's ratio of the loess soil, the normal stiffness and tangential stiffness between the loess soil particles are obtained; the specific calculation formula is:

[0042]

[0043] In the formula, K n Indicates the normal stiffness between loess particles, unit: Newton / cubic meter; K s It represents the tangential stiffness between loess particles, unit: Newton / cubic meter; E represents the elastic modulus of loess; v represents the Poisson's ratio of loess; π represents pi.

[0044] Substituting the elastic modulus and Poisson's ratio in Table 1 into the calculation formula in step S21, the normal stiffness K between loess particles in this embodiment is obtained: n =1.194×10 7 N / m 3 ; Tangential stiffness K between loess particles s =1.84×10 6 N / m 3 .

[0045] S22. According to the first preset formula and the cohesion of the loess soil body, the normal critical stress and the tangential critical stress between the particles of the loess soil body are obtained; the first preset formula is:

[0046] c=7.11lg(τ s )-6.5

[0047] τ n =τ s

[0048] Where c represents the cohesion of loess; τ s represents the tangential critical stress between loess particles; τ n Represents the normal critical stress between loess soil particles.

[0049] Substituting the cohesion values ​​in Table 1 into the first preset formula, the tangential critical stress τ between loess particles is obtained: s =2.06×10 10 Pa; normal critical stress τ between loess soil particles n =2.06×10 4 MPa.

[0050] S23, calculating the static friction coefficient between the loess particles according to the second preset formula and the internal friction angle between the loess particles; the second preset formula is:

[0051]

[0052] In the formula, represents the internal friction angle between loess particles; μ i Represents the static friction coefficient between loess soil particles.

[0053] Substituting the internal friction angle values ​​in Table 1 into the second preset formula, the static friction coefficient μ between loess particles is obtained: i =0.53.

[0054] It can be understood that in this application, the normal stiffness, tangential stiffness, normal critical stress, tangential critical stress and static friction coefficient between loess particles are collectively referred to as loess parameters.

[0055] S3. Input the loess soil parameters and the second information into EDEM software and perform bidirectional coupling with FLUENT software to obtain the slurry diffusion area.

[0056] Specifically, step S3 includes step S31, step S32, step S33, step S34, step S35 and step S36.

[0057] S31. Connect EDEM software and FLUENT software through UDF file;

[0058] S32, inputting the second information into FLUENT software, and setting the grouting slurry as a continuous medium;

[0059] S33, inputting loess soil parameters into EDEM software for calculation to obtain particle information, wherein the particle information includes the number, position and speed of loess soil particles;

[0060] S34, flow field calculation: obtain the particle information in the EDEM software in the FLUENT software to perform flow field calculation and obtain the grouting slurry movement results;

[0061] S35, dynamic simulation: after obtaining the grouting slurry movement results in FLUENT software in EDEM software, calculate again to obtain new particle information;

[0062] S36. Repeat the two steps of flow field calculation and dynamic simulation until the calculation converges and the slurry diffusion area is obtained.

[0063] S4. Calculate according to the slurry diffusion area to obtain the volume of the slurry diffusion area.

[0064] Specifically, step S4 includes step S41, step S42 and step S43.

[0065] S41, establishing a three-dimensional coordinate system for the slurry diffusion area to obtain the coordinates of the edge of the slurry diffusion area;

[0066] S42, fitting the coordinates of the edge of the slurry diffusion area to obtain a curve expression of the slurry diffusion area;

[0067] S43. Integrate the curve representation of the slurry diffusion area to obtain the volume of the slurry diffusion area.

[0068] In this embodiment, the coordinates of the two end points of the curve of the slurry diffusion area are (x1, y1) and (x2, y2). Under any grouting pressure, (x1, y1) are located at the same position on the vertical axis, y1 is the radius of the grouting hole, y1=17.372, and the volume expression of the slurry diffusion area is:

[0069]

[0070] Where V represents the volume of the slurry diffusion area; π represents pi; R represents the slurry diffusion radius, and the other grouting pressure relationship is: R = 468.05p 0.6697 , p represents the grouting pressure.

[0071] S5. The mass of the grouting slurry is obtained according to the volume of the slurry diffusion area and the density of the grouting slurry. The specific calculation formula is:

[0072]

[0073] Where m is equal to the mass of the grouting slurry; n is the number of grouting areas designed in the grouting project, which is usually designed to be 6; V is the volume of the slurry diffusion area; λ 浆Indicates the density of grouting slurry; ρ 水 Indicates the density of water, with a value of 1g / cm 3 .

[0074] Embodiment 2:

[0075] like Figure 2 As shown, this embodiment provides a calculation system 7 for the amount of grouting used for loess roadbed, and the calculation system 7 specifically includes:

[0076] An acquisition unit 710 is used to acquire first information and second information, wherein the first information is loess mechanical parameters; and the second information includes density, dynamic viscosity, water-cement ratio and grouting pressure of grouting slurry;

[0077] A first calculation unit 720 is used to calculate and obtain loess soil parameters according to the first information;

[0078] A coupling unit 730 is used to input the loess soil parameters and the second information into the EDEM software and the FLUENT software for bidirectional coupling to obtain the slurry diffusion area;

[0079] The second calculation unit 740 is used to calculate according to the slurry diffusion area to obtain the volume of the slurry diffusion area;

[0080] The third calculation unit 750 is used to calculate the mass of the grouting slurry according to the volume of the slurry diffusion area and the density of the grouting slurry.

[0081] Specifically, the first calculation unit 720 includes:

[0082] The fourth calculation unit is used to calculate the normal stiffness and tangential stiffness between particles of the loess soil body according to the elastic modulus and Poisson's ratio of the loess soil body;

[0083] A fifth calculation unit, which calculates the normal critical stress and the tangential critical stress between particles of the loess soil body according to the first preset formula and the cohesion of the loess soil body;

[0084] The sixth calculation unit is used to calculate the static friction coefficient between the loess particles according to the second preset formula and the internal friction angle between the loess particles.

[0085] Specifically, the coupling unit 730 includes:

[0086] Connection unit, used to connect EDEM software and FLUENT software through UDF file;

[0087] A first setting unit is used to input the second information into the FLUENT software and set the grouting slurry as a continuous medium;

[0088] The second setting unit is used to input loess soil parameters into EDEM software for calculation to obtain particle information, wherein the particle information includes the number, position and speed of loess soil particles;

[0089] Flow field calculation unit, used for flow field calculation: obtain the particle information in EDEM software in FLUENT software to perform flow field calculation and obtain the grouting slurry movement results;

[0090] Dynamic simulation unit, used for dynamic simulation: after obtaining the grouting slurry movement results in FLUENT software in EDEM software, recalculate to obtain new particle information;

[0091] The convergence unit is used to repeat the two steps of flow field calculation and dynamic simulation until the calculation converges and the slurry diffusion area is obtained.

[0092] Specifically, the second calculation unit 740 includes:

[0093] A system building unit is used to build a three-dimensional coordinate system for the slurry diffusion area and obtain the coordinates of the edge of the slurry diffusion area;

[0094] A fitting unit, used for fitting the coordinates of the edge of the slurry diffusion area to obtain a curve expression of the slurry diffusion area;

[0095] The integration unit is used to integrate the curve representation of the slurry diffusion area to obtain the volume size of the slurry diffusion area.

[0096] Embodiment 3:

[0097] Corresponding to the above method embodiment, this embodiment also provides a device for calculating the amount of grouting for loess roadbed. The device for calculating the amount of grouting for loess roadbed described below and the method for calculating the amount of grouting for loess roadbed described above can refer to each other.

[0098] Figure 3 FIG. 8 is a block diagram of a device 800 for calculating the amount of grouting for loess roadbed according to an exemplary embodiment. Figure 3 As shown, the calculation device 800 for calculating the amount of grouting of loess roadbed may include: a processor 801 and a memory 802. The calculation device 800 for calculating the amount of grouting of loess roadbed may also include one or more of a multimedia component 803, an I / O interface 804, and a communication component 805.

[0099] The processor 801 is used to control the overall operation of the loess roadbed grouting amount calculation device 800 to complete all or part of the steps in the above-mentioned loess roadbed grouting amount calculation method. The memory 802 is used to store various types of data to support the operation of the loess roadbed grouting amount calculation device 800, and these data may include, for example, instructions for any application or method operating on the loess roadbed grouting amount calculation device 800, and application-related data, such as contact data, sent and received messages, pictures, audio, video, etc. The memory 802 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, disk or optical disk. The multimedia component 803 can include a screen and an audio component. The screen can be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component can include a microphone, and the microphone is used to receive external audio signals. The received audio signal can be further stored in the memory 802 or sent through the communication component 805. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 804 provides an interface between the processor 801 and other interface modules, and the above-mentioned other interface modules can be keyboards, mice, buttons, etc. These buttons can be virtual buttons or physical buttons. The communication component 805 is used for wired or wireless communication between the calculation device 800 for the amount of grouting of loess roadbed and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G or 4G, or a combination of one or more of them, so the corresponding communication component 805 can include: Wi-Fi module, Bluetooth module, NFC module.

[0100] In an exemplary embodiment, the calculation device 800 for the amount of grouting of loess roadbed can be implemented by one or more application-specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned method for calculating the amount of grouting of loess roadbed.

[0101] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the above-mentioned method for calculating the amount of grouting of loess roadbed are implemented. For example, the computer-readable storage medium may be the above-mentioned memory 802 including program instructions, and the above-mentioned program instructions may be executed by the processor 801 of the device 800 for calculating the amount of grouting of loess roadbed to complete the above-mentioned method for calculating the amount of grouting of loess roadbed.

[0102] Embodiment 4:

[0103] Corresponding to the above method embodiment, a readable storage medium is also provided in this embodiment. The readable storage medium described below and the method for calculating the amount of grouting for loess roadbed described above can refer to each other.

[0104] A medium is a readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the method for calculating the amount of grouting for loess roadbed in the above method embodiment are implemented.

[0105] The readable storage medium may specifically be a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, or other readable storage medium that can store program codes.

[0106] 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.

[0107] 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 calculating the amount of grouting for loess roadbed, characterized in that: include: Acquire first information and second information, wherein the first information is loess mechanical parameters; the second information includes density, dynamic viscosity, water-cement ratio and grouting pressure of grouting slurry; Calculate and obtain loess soil parameters based on the first information; The loess soil parameters and second information were input into EDEM software and FLUENT software for bidirectional coupling to obtain the slurry diffusion area; Calculate according to the slurry diffusion area to obtain the volume of the slurry diffusion area; The mass of the grouting slurry is calculated based on the volume of the slurry diffusion area and the density of the grouting slurry.

2. The method for calculating the amount of grouting for loess roadbed according to claim 1, wherein the loess mechanical parameters include the elastic modulus, Poisson's ratio, cohesion and internal friction angle between loess particles, and the loess parameters include the normal stiffness, tangential stiffness, normal critical stress, tangential critical stress and static friction coefficient between loess particles, characterized in that: According to the first information, the loess soil parameters are obtained, including: According to the elastic modulus and Poisson's ratio of loess soil, the normal stiffness and tangential stiffness between loess soil particles are obtained; According to the first preset formula and the cohesion of the loess soil body, the normal critical stress and the tangential critical stress between the particles of the loess soil body are obtained; The static friction coefficient between the loess particles is calculated according to the second preset formula and the internal friction angle between the loess particles.

3. The method for calculating the amount of grouting for loess roadbed according to claim 1, characterized in that: The loess soil parameters and the second information are input into EDEM software and FLUENT software for bidirectional coupling to obtain the slurry diffusion area, including: Connect EDEM software and FLUENT software through UDF file; The second information is input into FLUENT software, and the grouting slurry is set as a continuous medium; Inputting loess soil parameters into EDEM software for calculation to obtain particle information, wherein the particle information includes the number, position and speed of loess soil particles; Flow field calculation: Obtain the particle information in the EDEM software in the FLUENT software to perform flow field calculation and obtain the grouting slurry movement results; Dynamic simulation: After obtaining the grouting slurry movement results in the FLUENT software in the EDEM software, the calculation is performed again to obtain new particle information; Repeat the two steps of flow field calculation and dynamic simulation until the calculation converges and the slurry diffusion area is obtained.

4. The method for calculating the amount of grouting for loess roadbed according to claim 1, characterized in that: The volume of the slurry diffusion area is calculated based on the slurry diffusion area, including: Establishing a three-dimensional coordinate system for the slurry diffusion area and obtaining the coordinates of the edge of the slurry diffusion area; Fitting the coordinates of the edge of the slurry diffusion area to obtain a curve expression of the slurry diffusion area; The volume of the slurry diffusion area is obtained by integrating the curve representation of the slurry diffusion area.

5. A calculation system for the amount of grouting used for loess roadbed, characterized in that: include: An acquisition unit, used to acquire first information and second information, wherein the first information is loess mechanical parameters; the second information includes density, dynamic viscosity, water-cement ratio and grouting pressure of grouting slurry; A first calculation unit is used to calculate and obtain loess soil parameters according to the first information; A coupling unit is used to input loess soil parameters and second information into EDEM software and perform bidirectional coupling with FLUENT software to obtain the slurry diffusion area; A second calculation unit is used to calculate according to the slurry diffusion area to obtain the volume of the slurry diffusion area; The third calculation unit is used to calculate the mass of the grouting slurry according to the volume of the slurry diffusion area and the density of the grouting slurry.

6. The calculation system for the amount of grouting of loess roadbed according to claim 5, characterized in that: The first computing unit comprises: The fourth calculation unit is used to calculate the normal stiffness and tangential stiffness between particles of the loess soil body according to the elastic modulus and Poisson's ratio of the loess soil body; A fifth calculation unit, which calculates the normal critical stress and the tangential critical stress between particles of the loess soil body according to the first preset formula and the cohesion of the loess soil body; The sixth calculation unit is used to calculate the static friction coefficient between the loess particles according to the second preset formula and the internal friction angle between the loess particles.

7. The calculation system for grouting amount of loess roadbed according to claim 5, characterized in that: The coupling unit includes: Connection unit, used to connect EDEM software and FLUENT software through UDF file; A first setting unit is used to input the second information into the FLUENT software and set the grouting slurry as a continuous medium; The second setting unit is used to input loess soil parameters into EDEM software for calculation to obtain particle information, wherein the particle information includes the number, position and speed of loess soil particles; Flow field calculation unit, used for flow field calculation: obtain the particle information in EDEM software in FLUENT software to perform flow field calculation and obtain the grouting slurry movement results; Dynamic simulation unit, used for dynamic simulation: after obtaining the grouting slurry movement results in FLUENT software in EDEM software, recalculate to obtain new particle information; The convergence unit is used to repeat the two steps of flow field calculation and dynamic simulation until the calculation converges and the slurry diffusion area is obtained.

8. The calculation system for grouting amount of loess roadbed according to claim 5, characterized in that: The second computing unit comprises: A system building unit is used to build a three-dimensional coordinate system for the slurry diffusion area and obtain the coordinates of the edge of the slurry diffusion area; A fitting unit, used for fitting the coordinates of the edge of the slurry diffusion area to obtain a curve expression of the slurry diffusion area; The integration unit is used to integrate the curve representation of the slurry diffusion area to obtain the volume size of the slurry diffusion area.

9. A device for calculating the amount of grouting for loess roadbed, characterized in that: include: Memory for storing computer programs; A processor is used to implement the steps of the method for calculating the amount of grouting for loess roadbed as described in any one of claims 1 to 4 when executing the computer program.

10. A medium, characterized in that The medium is a readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method for calculating the amount of grouting for loess roadbed as described in any one of claims 1 to 4 are implemented.

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