Method for determining corrosion performance of salinized soil to boundary tablet

Abstract

The invention discloses a method for determining the corrosion performance of salinized soil to a boundary tablet. The method comprises the following steps: dividing the boundary tablet into a plurality of corrosion zones according to the appearance of the boundary tablet; acquiring corrosion parameters of each corrosion zone and salinized soil parameters corresponding to the boundary tablet; and determining the corrosion performance of the salinized soil to the boundary tablet according to each corrosion parameter and the salinized soil parameter. According to the method, the boundary tablet in the external environment is directly observed and calculated to obtain the corrosion parameters of the boundary tablet, and the influence of the natural environment and the service duration on the boundary tablet is fully considered, so that the obtained corrosion parameters can better represent the real corrosion condition of the boundary tablet; the method for determining the corrosion performance of the salinized soil to the boundary tablet has higher accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of saline soil field investigation, and in particular to a method for determining the corrosion performance of saline soil on boundary monuments. Background Art

[0002] Saline soils are widely distributed, not only in desert and semi-desert areas, but also often in fertile alluvial plains, river basins, and densely populated coastal areas and irrigation systems.

[0003] In areas with high groundwater levels and high groundwater mineralization, due to the obvious effects of dry-wet cycles, soluble salts will enter the interior of the boundary monument through the pores, and then interact with the porous medium material, changing its original properties and causing the material to deteriorate. This phenomenon is called saline soil corrosion.

[0004] At present, the research on the ability of saline soil to corrode boundary markers mainly focuses on indoor test methods. The main idea is to prepare salt solutions indoors to immerse boundary marker samples or conduct dry-wet cycle tests. This type of indoor test method is difficult to simulate the complex natural conditions that boundary markers experience in the field, and the time course of indoor tests is generally short, making it difficult to simulate the long-term service of boundary markers. Summary of the invention

[0005] In order to solve the above problems, the present invention discloses a method for determining the corrosion performance of saline soil on boundary monuments.

[0006] The invention discloses a method for determining the corrosion performance of saline soil on boundary monuments, comprising the following steps: The boundary monument is divided into several corrosion zones according to its appearance and morphology; Obtain the corrosion parameters of each corrosion zone and the saline soil parameters corresponding to the boundary marker; The corrosion performance of saline soil on boundary markers is determined based on each corrosion parameter and saline soil parameter.

[0007] The corrosion parameter is the geometric loss rate. Accordingly, the corrosion parameter of each corrosion zone is obtained, specifically: Get the geometric parameters of each corrosion zone; The corresponding geometric loss rate is determined according to the geometric parameters.

[0008] The corresponding geometric loss rate is determined according to the geometric parameters, specifically: According to the ratio of the geometric parameters of each corrosion zone to the geometric parameters of the intact monument, the geometric loss rate corresponding to each corrosion zone is determined.

[0009] Preferably, after determining the corrosion performance of saline soil on the boundary monument according to each corrosion parameter and saline soil parameter, the method further includes: Obtaining physical corrosion parameters of each corrosion zone, wherein the physical corrosion parameters include density and hardness of each corrosion zone; According to each physical corrosion parameter and saline soil parameter, the corrosion performance of saline soil on boundary markers is determined.

[0010] Preferably, after determining the corrosion performance of saline soil on the boundary monument according to each physical corrosion parameter and saline soil parameter, the method further comprises: Acquire chemical corrosion parameters of each corrosion zone, wherein the chemical corrosion parameters include material composition of each corrosion zone; According to each chemical corrosion parameter and saline soil parameter, the corrosion performance of saline soil on boundary markers is determined.

[0011] Preferably, after determining the corrosion performance of saline soil on the boundary monument according to each chemical corrosion parameter and saline soil parameter, the method further includes: Obtain the microscopic corrosion morphology of each corrosion zone; According to the microscopic corrosion morphology of each corrosion zone and the parameters of saline soil, the corrosion performance of saline soil on boundary markers was determined.

[0012] Optionally, the plurality of corrosion zones include at least one of a complete zone, a fine aggregate falling-off zone, a coarse aggregate falling-off zone and a material missing zone.

[0013] The saline soil parameter includes at least one of soil salt content and groundwater depth.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention directly observes and calculates the boundary monuments in the external environment to obtain the corrosion parameters of the boundary monuments, and fully considers the influence of the natural environment and the service time on the boundary monuments. Therefore, the obtained corrosion parameters can better characterize the actual corrosion situation of the boundary monuments, so that the method for determining the corrosion performance of saline soil on boundary monuments of the present invention has higher accuracy; (2) The present invention obtains the corrosion parameters of saline soil on boundary monuments from multiple angles such as geometric corrosion parameters, physical corrosion parameters, chemical corrosion parameters and microscopic corrosion morphology of boundary monuments, so the present invention can more comprehensively characterize the corrosion ability of saline soil on boundary monuments; (3) The present invention divides the boundary monument into multiple corrosion zones and obtains the geometric loss rate of each corrosion zone, which more accurately quantifies the corrosion capacity of saline soil on the boundary monument; (4) The present invention simultaneously obtains the relationship between the degree of boundary monument corrosion and the soil salt content and groundwater depth, and more comprehensively and systematically presents the performance of saline soil corrosion boundary monuments; (5) The present invention uses a plurality of linearly distributed boundary markers as research objects, which can reflect the situation in which the corrosion capacity of saline soil on boundary markers changes with the geological conditions in a region, thereby facilitating a comprehensive evaluation of the corrosion performance of saline soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the steps of the method of the present invention; Figure 2 It is a schematic diagram of the corrosion zone divided by the boundary monument in the present invention; Figure 3 is a relationship diagram between the boundary monument corrosion height and saline soil parameters constructed by the present invention; Figure 4 is a relationship diagram between the perimeter loss rate of each corrosion zone constructed by the present invention and the saline soil parameters; Figure 5 It is a relationship diagram between the volume loss rate of each corrosion zone constructed by the present invention and the saline soil parameters.

[0016] In the figure, 1 is the complete zone; 2 is the fine aggregate falling zone; 3 is the coarse aggregate falling zone; 4 is the material missing zone; 5 is the soil salt content; and 6 is the height of the coarse aggregate falling zone. DETAILED DESCRIPTION

[0017] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0018] like Figure 1 As shown, the present invention discloses a method for determining the corrosion performance of saline soil on boundary monuments, comprising the following steps: Step 1: Divide the boundary monument into multiple corrosion zones according to its appearance and morphology; In step 1, the concrete pile is divided into corrosion zones according to the observed appearance. In this embodiment, the corroded boundary monument is divided into: fine aggregate shedding zone 2, coarse aggregate shedding zone 3 and material missing zone 4 according to the macroscopic appearance. The present invention directly observes and calculates the boundary markers in the external environment to obtain the corrosion parameters of the boundary markers, fully considering the influence of the natural environment and the service time on the boundary markers. Therefore, the obtained corrosion parameters can better characterize the actual corrosion situation of the boundary markers, making the method for determining the corrosion performance of saline soil on boundary markers of the present invention have higher accuracy.

[0019] Step 2: Obtain the corrosion parameters of each corrosion zone and the saline soil parameters corresponding to the boundary marker; The corrosion parameter is the geometric loss rate. Accordingly, the corrosion parameter of each corrosion zone is obtained, which is: Get the geometric parameters of each corrosion zone; Determine the corresponding geometric loss rate according to the geometric parameters; In this embodiment, the geometric parameters include the height of each corrosion zone from the ground and the geometric characteristics of each corrosion zone. The height can be the height of the end position of each corrosion zone from the ground, or the height of the starting position of each corrosion zone from the ground (such as Figure 2 As shown, it is the height of the coarse aggregate falling zone 6); the geometric characteristics include side length, perimeter and strip length (the length of the corrosion zone along the vertical direction); in this embodiment, when measuring the side length, perimeter and strip length, the starting, ending and middle positions of each corrosion zone are measured respectively, and then the average value is obtained. Furthermore, the present invention also obtains the perimeter, side length and other geometric parameters of the complete boundary monument; in the geometric parameters of each corrosion zone, the geometric loss rate corresponding to the perimeter is the perimeter loss rate; the geometric loss rate corresponding to the volume is the volume loss rate, and the geometric loss rate corresponding to the strip length is the strip length loss rate.

[0020] Determine the corresponding geometric loss rate according to the geometric parameters, specifically: According to the ratio of the geometric parameters of each corrosion zone to the geometric parameters of the intact monument, the geometric loss rate corresponding to each corrosion zone is determined. Take the definition and calculation formula of the perimeter loss rate and volume loss rate of each corrosion zone as an example to illustrate: Perimeter loss rate: the ratio of the perimeter of the corrosion zone to the perimeter of the intact boundary monument.

[0021]

[0022] In the formula, L Lr is the perimeter loss rate; L c is the circumference of the corrosion zone; L 0 It is the complete perimeter of the boundary marker.

[0023] Volume loss rate: the ratio of the volume of the corrosion zone to the volume of the intact boundary monument.

[0024]

[0025] In the formula, V Lr is the volume loss rate; V c The volume of the corrosion zone can be obtained by measuring the length, width and height of each corrosion zone respectively and then calculating; V 0 It is the volume of the complete boundary monument.

[0026] Furthermore, if Figure 2 As shown, in other embodiments, the corrosion zone also includes a complete zone 1. Since the corrosion degree of the complete zone 1 is not high, it can be regarded as a complete monument.

[0027] Correspondingly, such as Figure 4 , Figure 5 As shown, the geometric loss rate corresponding to each corrosion zone except the complete zone 1 is determined according to the ratio of the geometric parameters of other corrosion zones to the geometric parameters of the complete zone 1.

[0028] The present invention divides the boundary monument into a plurality of corrosion zones, obtains the geometric loss rate of each corrosion zone, and more accurately quantifies the corrosion capacity of saline soil on the boundary monument.

[0029] Step 3: Determine the corrosion performance of saline soil on the boundary marker based on each corrosion parameter and saline soil parameter.

[0030] like Figure 3 , Figure 4 , Figure 5 As shown, the corrosion performance of the saline soil on the boundary marker is determined according to each corrosion parameter and the saline soil parameter, specifically: a relationship image between each corrosion parameter and the saline soil parameter is obtained, and the corrosion performance of the saline soil on the boundary marker is determined according to the relationship image.

[0031] Preferably, after determining the corrosion performance of saline soil on the boundary monument according to each corrosion parameter and saline soil parameter, the method further includes: Step 4: Obtain the physical corrosion parameters of each corrosion zone, the physical corrosion parameters including the density and hardness of each corrosion zone; in this embodiment, the hardness of each corrosion zone is measured by a rebound tester, and the density of each corrosion zone is measured by a density tester; Furthermore, after obtaining the physical corrosion parameters of each corrosion zone, the physical loss rate corresponding to each corrosion zone is determined according to the physical corrosion parameters. This embodiment takes the physical loss rate corresponding to the density, that is, the mass loss rate, as an example for explanation: Mass loss rate: the ratio of the mass of the corroded concrete pile to the mass of the intact boundary marker.

[0032]

[0033] In the formula, M Lr is the mass loss rate; M c is the quality of the corrosion zone; M 0 To ensure the quality of the complete boundary monument.

[0034] The mass of each corrosion zone is obtained by multiplying the volume of the corresponding corrosion zone by the density of the corrosion zone; correspondingly, the mass of the complete boundary monument is obtained by multiplying the volume of the complete boundary monument by the density of the complete boundary monument.

[0035] Step 5: Determine the corrosion performance of saline soil on boundary markers based on each physical corrosion parameter and saline soil parameter.

[0036] Step five specifically involves obtaining a relationship image between each physical corrosion parameter and a saline soil parameter, and determining the corrosion performance of the saline soil on the boundary marker based on the relationship image.

[0037] Preferably, after determining the corrosion performance of saline soil on the boundary monument according to each physical corrosion parameter and saline soil parameter, the method further comprises: Step 6: Obtain chemical corrosion parameters of each corrosion zone, where the chemical corrosion parameters include material composition of each corrosion zone; The chemical corrosion parameters of each corrosion zone are obtained by sampling the concrete of each corrosion zone, using an ICS-2500 ion chromatograph to determine the anion and cation composition of the dissolution solution, and then using XRD to determine the mineral composition of each corrosion zone.

[0038] Step 7: Determine the corrosion performance of the saline soil on the boundary marker according to each chemical corrosion parameter and saline soil parameter. Step 7 specifically includes: obtaining a relationship image between each chemical corrosion parameter and saline soil parameter, and determining the corrosion performance of the saline soil on the boundary marker according to the relationship image.

[0039] Preferably, after determining the corrosion performance of saline soil on the boundary monument according to each chemical corrosion parameter and saline soil parameter, the method further includes: Step 8: Observe the microscopic corrosion morphology of each corrosion zone, such as the microstructure of the material, by scanning electron microscopy; Step 9: Determine the corrosion performance of saline soil on boundary markers based on the microscopic corrosion morphology and saline soil parameters of each corrosion zone. Step 9 specifically includes: identifying the degree of corrosion of saline soil on concrete from a microscopic perspective and analyzing its corrosion mechanism; determining the corrosion performance of saline soil on boundary markers based on the degree of corrosion and corrosion mechanism.

[0040] Optionally, the saline soil parameter includes at least one of soil salt content 5 and groundwater depth.

[0041] The present invention simultaneously obtains the relationship between the degree of boundary monument corrosion and the soil salt content 5 and the groundwater depth, and more comprehensively and systematically shows the performance of saline soil corrosion boundary monuments.

[0042] Optionally, there are multiple boundary markers, which are linearly distributed in the survey area.

[0043] The present invention takes a plurality of linearly distributed boundary markers as research objects, and can reflect the situation in which the corrosion capacity of saline soil on boundary markers changes with geological conditions in a region, thereby being conducive to a comprehensive evaluation of the corrosion performance of saline soil.

[0044] Optionally, before dividing the corrosion zone of each boundary marker in step 1, the engineering geological conditions of the survey area can be ascertained by consulting literature and looking up the engineering geological description report of the survey area, including information such as natural geographical location, topography, stratum lithology, regional climate conditions, hydrogeological conditions, and geological structure. In particular, hydrogeological conditions and regional climate conditions have important influences on the corrosion capacity of saline soil; and the construction time of the boundary marker is ascertained. The time from the construction time to the survey time is equivalent to the time the boundary marker experiences in-situ corrosion, which is of great significance for the evaluation of the corrosion capacity of saline soil in the later stage.

[0045] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention directly observes and calculates the boundary monuments in the external environment to obtain the corrosion parameters of the boundary monuments, and fully considers the influence of the natural environment and the service time on the boundary monuments. Therefore, the obtained corrosion parameters can better characterize the actual corrosion situation of the boundary monuments, so that the method for determining the corrosion performance of saline soil on boundary monuments of the present invention has higher accuracy; (2) The present invention obtains the corrosion parameters of saline soil on boundary monuments from multiple angles such as geometric corrosion parameters, physical corrosion parameters, chemical corrosion parameters and microscopic corrosion morphology of boundary monuments, so the present invention can more comprehensively characterize the corrosion ability of saline soil on boundary monuments; (3) The present invention divides the boundary monument into multiple corrosion zones and obtains the geometric loss rate of each corrosion zone, which more accurately quantifies the corrosion capacity of saline soil on the boundary monument; (4) The present invention simultaneously obtains the relationship between the degree of boundary monument corrosion and the soil salt content and groundwater depth, and more comprehensively and systematically presents the performance of saline soil corrosion boundary monuments; (5) The present invention uses a plurality of linearly distributed boundary markers as research objects, which can reflect the situation in which the corrosion capacity of saline soil on boundary markers changes with the geological conditions in a region, thereby facilitating a comprehensive evaluation of the corrosion performance of saline soil.

[0046] The above are only a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A method for determining the corrosion performance of saline soil on boundary monuments, characterized in that: The following steps are involved: The boundary monument is divided into several corrosion zones according to its appearance and morphology; Obtain the corrosion parameters of each corrosion zone and the saline soil parameters corresponding to the boundary marker; The corrosion performance of saline soil on boundary markers is determined based on each corrosion parameter and saline soil parameter.

2. The method for determining the corrosion performance of saline soil on boundary monuments according to claim 1, characterized in that: The corrosion parameter is the geometric loss rate. Accordingly, the corrosion parameter of each corrosion zone is obtained, specifically: Get the geometric parameters of each corrosion zone; The corresponding geometric loss rate is determined according to the geometric parameters.

3. The method for determining the corrosion performance of saline soil on boundary monuments according to claim 2, characterized in that: The corresponding geometric loss rate is determined according to the geometric parameters, specifically: According to the ratio of the geometric parameters of each corrosion zone to the geometric parameters of the intact monument, the geometric loss rate corresponding to each corrosion zone is determined.

4. The method for determining the corrosion performance of saline soil on boundary monuments according to claim 1, characterized in that: After determining the corrosion performance of saline soil on the boundary monument according to each corrosion parameter and saline soil parameter, it also includes: Obtaining physical corrosion parameters of each corrosion zone, wherein the physical corrosion parameters include density and hardness of each corrosion zone; According to each physical corrosion parameter and saline soil parameter, the corrosion performance of saline soil on boundary markers is determined.

5. The method for determining the corrosion performance of saline soil on boundary monuments according to claim 4, characterized in that: After determining the corrosion performance of saline soil on boundary markers based on each physical corrosion parameter and saline soil parameter, it also includes: Acquire chemical corrosion parameters of each corrosion zone, wherein the chemical corrosion parameters include material composition of each corrosion zone; According to each chemical corrosion parameter and saline soil parameter, the corrosion performance of saline soil on boundary markers is determined.

6. The method for determining the corrosion performance of saline soil on boundary monuments according to claim 5, characterized in that: After determining the corrosion performance of saline soil on boundary markers according to each chemical corrosion parameter and saline soil parameter, it also includes: Obtain the microscopic corrosion morphology of each corrosion zone; According to the microscopic corrosion morphology of each corrosion zone and the parameters of saline soil, the corrosion performance of saline soil on boundary markers was determined.

7. The method for determining the corrosion performance of saline soil on boundary monuments according to claim 1, characterized in that: The plurality of corrosion zones include at least one of a complete zone, a fine aggregate falling-off zone, a coarse aggregate falling-off zone, and a material missing zone.

8. The method for determining the corrosion performance of saline soil on boundary monuments according to any one of claims 1 to 7, characterized in that: The saline soil parameter includes at least one of soil salt content and groundwater depth.

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