Knife switch type soil body and metal interface adhesive force detection system and detection method

Abstract

The invention provides a knife switch type soil body and metal interface adhesive force detection system and method.The knife switch is used for simulating material characteristics of different construction machines, and a to-be-detected soil sample is sheared with constant force through the knife switch until the knife switch reaches a balanced state; after the knife switch reaches a balanced state, gradually increasing separation traction force is applied to the knife switch until the knife switch is completely separated from the soil sample to be detected; analyzing the adhesive force between the knife switch and the soil sample to be tested according to the cut-in penetration when the knife switch reaches a balanced state and the separation traction when the knife switch is completely separated from the soil sample to be tested; the device can quickly, efficiently and indirectly measure the adhesive force of the soil body and the metal interface, and provides a theoretical basis for design, installation and application of construction machinery which interacts with the soil body and is influenced by the adhesive force of the soil body and construction of engineering projects.

Description

Technical Field

[0001] The invention belongs to the technical field of soil layer and metal adhesion detection, and in particular relates to a guillotine type soil body and metal interface adhesion detection system and method. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] The adhesion of soil refers to the bonding force between soil particles themselves or between them and the medium. It is a measure of the strength of the association between soil particles and the medium, and reflects the mutual attraction between soil particles and the medium. The data of this parameter is mostly obtained through laboratory test calculations. The method is: under effective stress, the total shear strength is deducted from the friction strength to obtain the adhesion.

[0004] The adhesion of the soil near the river bank is significantly improved after being affected by the seepage of groundwater, which affects the excavation and construction of river bank projects, such as the design, installation and application of construction machinery for ship lock installation, pipe segment sinking, cutter head rotation, and other working conditions, as well as the construction of engineering projects. However, due to the constraints of environmental factors at the engineering site, it is difficult to obtain the adhesion of the soil-metal interface through the above-mentioned laboratory test method. Summary of the invention

[0005] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a guillotine-type soil-metal interface adhesion detection system and method, which can quickly and efficiently indirectly measure the soil-metal interface adhesion, and can reflect the real physical and mechanical state of the interaction between the soil and various metal materials at the engineering site.

[0006] To achieve the above object, the first aspect of the present invention provides a guillotine-type soil-metal interface adhesion detection system, comprising:

[0007] Soil sample box, used to place soil samples to be tested;

[0008] A knife, arranged toward the soil sample box, is used to simulate construction machinery of different materials and shear the soil sample to be tested in the soil sample box;

[0009] A control system, which is configured to: control the gate knife to shear the soil sample to be tested with a constant force until the gate knife reaches a balanced state; and after the gate knife reaches a balanced state, apply a separation traction force that increases step by step to the gate knife until the gate knife is completely separated from the soil sample to be tested;

[0010] The analysis system is configured to analyze the adhesion between the gate blade and the soil sample to be tested according to the cutting penetration when the gate blade reaches a balanced state and the separation traction when the gate blade and the soil sample to be tested are completely separated.

[0011] A second aspect of the present invention provides a guillotine-type soil-metal interface adhesion detection method, comprising:

[0012] Place the soil sample to be tested into the soil sample box;

[0013] Select a knife made of the same material as the construction machinery to be tested, and shear the soil sample to be tested with a constant force until the knife reaches a balanced state;

[0014] Applying a gradually increasing separation traction force to the gate knife until the gate knife is completely separated from the soil sample to be tested;

[0015] The adhesion between the gate knife and the soil sample to be tested is analyzed according to the penetration degree of the gate knife when the gate knife reaches a balanced state and the separation traction force when the gate knife and the soil sample to be tested are completely separated.

[0016] One or more of the above technical solutions have the following beneficial effects:

[0017] In the present invention, a gate knife is used to simulate the material properties of different construction machinery, and the gate knife is used to shear the soil sample to be tested with a constant force until the gate knife reaches a balanced state; and after the gate knife reaches a balanced state, a separation traction force that increases step by step is applied to the gate knife until the gate knife is completely separated from the soil sample to be tested; based on the penetration of the gate knife when it reaches a balanced state, and the separation traction force when the gate knife is completely separated from the soil sample to be tested, the adhesion between the gate knife and the soil sample to be tested is analyzed; the adhesion between the soil and metal interface can be indirectly measured quickly and efficiently, providing a theoretical basis for the design, installation and application of construction machinery that interacts with the soil and is affected by the adhesion of the soil, and the construction of engineering projects.

[0018] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] Figure 1 Schematic diagram of the guillotine shearing device in the first embodiment of the present invention;

[0021] Figure 2 Schematic diagram of the initial state of the guillotine shearing device in the first embodiment of the present invention;

[0022] Figure 3 Schematic diagram of the shearing state of the guillotine shearing device in the first embodiment of the present invention;

[0023] Figure 4 Schematic diagram of the knife switch in the first embodiment of the present invention;

[0024] In the figure, 1. switch; 2. soil sample box; 3. base plate; 4. incoming line connector; 5. control system; 6. scale line. DETAILED DESCRIPTION

[0025] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0026] It should be noted that the terms used herein are for describing specific embodiments only and are not intended to be limiting of exemplary embodiments according to the present invention.

[0027] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0028] Embodiment 1

[0029] like Figure 1-Figure 4 As shown, this embodiment discloses a guillotine-type soil-metal interface adhesion detection system, comprising:

[0030] Soil sample box 2, used for placing soil samples to be tested;

[0031] The knife 1 is arranged toward the soil sample box 2, and is used to simulate construction machinery of different materials and shear the soil sample to be tested in the soil sample box 2;

[0032] The control system 5 is configured to: control the gate knife 1 to shear the soil sample to be tested with a constant force until the gate knife 1 reaches a balanced state; and after the gate knife 1 reaches a balanced state, apply a separation traction force that increases step by step to the gate knife 1 until the gate knife 1 is completely separated from the soil sample to be tested;

[0033] The analysis system is configured to analyze the adhesion between the gate knife 1 and the soil sample to be tested according to the cutting penetration when the gate knife 1 reaches a balanced state and the separation traction when the gate knife 1 and the soil sample to be tested are completely separated.

[0034] In this embodiment, a gate knife is used to simulate the material properties of different construction machinery, and the gate knife is used to shear the soil sample to be tested with a constant force until the gate knife reaches a balanced state; and after the gate knife reaches a balanced state, a gradually increasing separation traction force is applied to the gate knife until the gate knife and the soil sample to be tested are completely separated; based on the penetration of the gate knife when it reaches a balanced state, and the separation traction force when the gate knife and the soil sample to be tested are completely separated, the adhesion between the gate knife and the soil sample to be tested is analyzed; the adhesion between the soil and metal interface can be indirectly measured quickly and efficiently, providing a theoretical basis for the design, installation and application of construction machinery that interacts with the soil and is affected by the adhesion of the soil, and the construction of engineering projects.

[0035] As an implementation mode, the blade of the gate knife 1 can be replaced with different materials according to different construction machines, and the same, similar or construction machine materials with similar friction coefficients can be used as the blade of the gate knife 1 to simulate more realistic construction conditions.

[0036] As an implementation mode, vertical openings are retained at both ends of the soil sample box 2 to allow the knife to shear the soil sample to be tested.

[0037] As an implementation mode, the control system 5 includes a generator, and the generator is connected to the switch 1 through an electric wire.

[0038] As an implementation mode, a bottom plate 3 is arranged below the soil sample box 2 , a line connector 4 connected to a control system 5 is arranged on the bottom plate 3 , and a fuse is arranged inside the bottom plate 3 .

[0039] As an implementation mode, the scale is calibrated in the middle of the gate blade 1, and the cutting depth in the middle of the gate blade 1 is defined as the cutting penetration degree, and data can be directly read on the gate blade.

[0040] Specifically, at the middle position of the blade 1, a scale is marked in a direction perpendicular to the length of the blade 1; the bottom of the middle of the blade 1 is the zero point of the scale, and the graduation value can be 0.5 cm.

[0041] As an implementation method, the blade 1 shears the soil with a constant force until the blade remains stationary and a state of equilibrium is reached. At this time, a reading is taken according to the scale on the blade reached by the soil surface, and the corresponding reading is the penetration degree. When the blade 1 finishes shearing the soil, a separation traction force that increases step by step from 0 is applied to the blade through the control system until the blade is completely separated from the soil sample, and the separation traction force of the blade at this time is recorded.

[0042] Among them, the equilibrium state means that after the gate cuts into the soil, when the soil adhesion and penetration force are balanced, the gate remains stationary in the soil sample, which is the equilibrium state.

[0043] The soil adhesion is quantified by the cut-in penetration and separation traction, and the relationship formula between the three is fitted, which provides more accurate soil adhesion parameters for the design, installation and application of construction machinery and the construction of engineering projects.

[0044] Specifically, the adhesion between soil and metal is first measured by an existing laboratory method; then the soil is operated using the method of this embodiment to obtain a set of penetration and separation traction values. Take as many groups of soil samples as possible to perform the above two steps. It is known that the adhesion is negatively correlated with the penetration and positively correlated with the separation traction. A nonlinear fitting mathematical model is created using numerical analysis software, and regression statistical analysis is performed on the data to calculate the values ​​of parameters related to the penetration and separation traction, and fit the formula for the relationship between the adhesion and the two.

[0045] Specifically, a nonlinear fitting mathematical model is created, namely:

[0046]

[0047] Where y is the adhesion force, x is 1 is the penetration, x 2 To separate the traction;

[0048] Substitute the above test data into the model, regress the relevant data, perform variance analysis, and obtain the coefficient a 0 、a 1 、a 2 、a 3 、a 4 、a 5 、a 6 The value of .

[0049] As an implementation method, an evaluation system is also included. According to the influence of adhesion on the construction machine, an evaluation standard for adhesion is formulated, which is divided into three levels: low, medium and high. The lower the penetration value, the higher the separation traction value, the greater the adhesion, and the higher the evaluation level.

[0050] When the evaluation level is low, the impact of adhesion on machinery or engineering can be ignored; when it is intermediate, a safety factor should be set during machinery design or engineering construction to ensure the normal use of subsequent equipment or the safety of engineering projects; when it is high, soil adhesion will have a serious impact on machinery or engineering, and the mechanical materials should be replaced or efforts should be made to reduce the adhesion of the soil.

[0051] In view of the problem that the adhesion between the soil and the metal interface is difficult to calculate through laboratory tests due to environmental factors at the construction site. This embodiment can truly simulate the material properties of different construction machinery and quickly and efficiently indirectly measure the adhesion between the soil and the metal interface. Compared with the laboratory test method, this embodiment is more efficient and convenient, and can reflect the real physical and mechanical state of the interaction between the soil and various metal materials at the construction site.

[0052] Embodiment 2

[0053] The purpose of this embodiment is to provide a guillotine-type soil-metal interface adhesion detection method, comprising:

[0054] Place the soil sample to be tested into the soil sample box;

[0055] Select a knife made of the same material as the construction machinery to be tested, and shear the soil sample to be tested with a constant force until the knife reaches a balanced state;

[0056] Applying a gradually increasing separation traction force to the gate knife until the gate knife is completely separated from the soil sample to be tested;

[0057] The adhesion between the gate knife and the soil sample to be tested is analyzed according to the penetration degree of the gate knife when the gate knife reaches a balanced state and the separation traction force when the gate knife and the soil sample to be tested are completely separated.

[0058] Those skilled in the art should understand that the modules or steps of the present invention described above can be implemented by a general-purpose computer device, or alternatively, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. The present invention is not limited to any specific combination of hardware and software.

[0059] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A guillotine-type soil-metal interface adhesion detection system, characterized in that: include: Soil sample box, used to place soil samples to be tested; A knife, arranged toward the soil sample box, is used to simulate construction machinery of different materials and shear the soil sample to be tested in the soil sample box; A control system, which is configured to: control the gate knife to shear the soil sample to be tested with a constant force until the gate knife reaches a balanced state; and after the gate knife reaches a balanced state, apply a separation traction force that increases step by step to the gate knife until the gate knife is completely separated from the soil sample to be tested; The analysis system is configured to analyze the adhesion between the gate blade and the soil sample to be tested according to the cutting penetration when the gate blade reaches a balanced state and the separation traction when the gate blade and the soil sample to be tested are completely separated.

2. A guillotine type soil-metal interface adhesion detection system as claimed in claim 1, characterized in that: According to the materials of different construction machines to be tested, the material that is the same as the material of the different construction machines or has the same friction coefficient is used as the blade material.

3. A guillotine type soil-metal interface adhesion detection system as claimed in claim 1, characterized in that: The two ends of the soil sample box are provided with vertical cutting edges, so that the knife can shear the soil sample to be tested through the vertical cutting edges.

4. A guillotine type soil-metal interface adhesion detection system as claimed in claim 1 or 3, characterized in that: A bottom plate is arranged below the soil sample box, and a fuse is arranged inside the bottom plate.

5. A guillotine type soil-metal interface adhesion detection system as claimed in claim 1, characterized in that: The middle part of the gate knife is marked with a scale, and the corresponding cutting penetration degree when the gate knife reaches a balanced state is obtained according to the marked scale.

6. A guillotine type soil-metal interface adhesion detection system as claimed in claim 1, characterized in that: It also includes an evaluation system, in which different levels of adhesion evaluation standards are set. The evaluation system compares the adhesion between the soil sample to be tested and the gate obtained by the analysis system with the adhesion evaluation standards of different levels to obtain an evaluation level result.

7. A guillotine type soil-metal interface adhesion detection system as claimed in claim 1, characterized in that: When the blade shears the soil sample to be tested with a constant force until the blade remains stationary, the blade reaches a balanced state.

8. A guillotine type soil-metal interface adhesion detection system as claimed in claim 1, characterized in that: In the analysis system, it is configured to: create a nonlinear fitting mathematical model, obtain multiple groups of cutting penetration and separation traction through experiments, and solve the parameters of the nonlinear fitting mathematical model in combination with the corresponding known adhesion forces; obtain the adhesion force between the soil sample to be tested and the gate knife based on the nonlinear fitting mathematical model with known parameters.

9. A guillotine-type soil-metal interface adhesion detection method, characterized in that: include: Place the soil sample to be tested into the soil sample box; Select a knife made of the same material as the construction machinery to be tested, and shear the soil sample to be tested with a constant force until the knife reaches a balanced state; Applying a gradually increasing separation traction force to the gate knife until the gate knife is completely separated from the soil sample to be tested; The adhesion between the gate knife and the soil sample to be tested is analyzed according to the penetration degree of the gate knife when the gate knife reaches a balanced state and the separation traction force when the gate knife and the soil sample to be tested are completely separated.

10. A guillotine-type soil-metal interface adhesion detection method as claimed in claim 9, characterized in that: Also includes: The middle part of the gate knife is calibrated, and the cutting depth of the middle part of the gate knife is used as the cutting penetration.

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