Method for determining degree and type of salinization of saline soil applied to road construction

Abstract

The application provides a determination method of salinization degree and type of saline soil applied to road construction, obtains a water-soil mixed solution containing the saline soil of a region to be constructed by proportioning, measures the conductivity of the water-soil mixed solution related to total salt content and introduces a temperature factor in the measurement. The Cl – ion content, SO4 2‑ ion content, calculates a chlorine-sulfur ratio, and determines the saline soil type, salinization degree and salt distribution in the stockyard in combination with the conductivity. The measurement method of the application replaces the ion detection test of conventional soluble salt, can quickly and accurately master the soluble salt content and composition in alkaline saline soil, can facilitate the construction unit to take targeted measures, reasonably utilizes and improves the soil body, can save time and resources, reduces the judgment cost, speeds up the construction quality and progress, improves the engineering management, has obvious economic and social benefits, and has certain application prospect.

Description

Technical Field

[0001] This invention belongs to the field of road construction technology, specifically relating to a method for determining the degree and type of salinization of saline soil in road construction. Background Technology

[0002] When designing highway projects in Xinjiang, a region with high and diverse salinity, it is crucial to accurately determine whether the soil is saline and to differentiate its degree and type beforehand. This information is essential for design units to determine the appropriate design principles and treatment methods. If saline soil is mistakenly identified as non-saline soil and used in road construction, it can easily become a hidden danger leading to major road defects. Conversely, misidentifying non-saline soil as saline soil increases construction costs. Therefore, the detection and analysis of soluble salts in road construction is of paramount importance.

[0003] Analyzing the content and composition of soluble salts in soil helps to understand the salt content and specific composition of salts in the soil, and further determines the type of saline soil, the degree of salinization, and salt dynamics. This will help construction units take targeted measures to improve and utilize the soil. Therefore, in actual road engineering, the method of identifying saline soil will directly affect the efficiency and quality of construction.

[0004] While existing technologies, based on the standard "Specifications for Geotechnical Testing of Highways," can accurately determine the total content of soluble salts and the content of various ions, and subsequently, according to the "Technical Specifications for Design and Construction of Highway Subgrade and Pavement in Xinjiang Saline Soil Areas," can determine the degree of salinization and the type of saline soil, the testing process is not only cumbersome and time-consuming, but also unsuitable for rapid on-site testing of large quantities of soil samples. Furthermore, road construction is typically carried out in sparsely populated areas, and the laboratories of construction units are often relatively basic compared to those in urban areas, thus generally failing to meet the need for rapid testing of large numbers of soil samples.

[0005] While existing patent applications propose methods for rapidly determining the salinization degree of saline soils, none of them overcome the influence of the soil's moisture content on the measured conductivity values. In field exploration, soil moisture content is typically measured using drying or alcohol combustion methods, which have specific equipment and operational requirements. Furthermore, existing research indicates that pH value significantly affects the measured conductivity of alkaline saline soils, a factor that current patents fail to consider. Therefore, a simpler, faster, and more accurate method for determining the salinization degree of alkaline saline soils is needed. Summary of the Invention

[0006] To address the aforementioned problems in the existing technology, this invention provides a method for determining the degree and type of salinization in alkaline saline soil used in road construction.

[0007] This invention provides a method for determining the degree and type of salinization of saline soil in road construction, including:

[0008] S100, Select saline soil samples from the planned road construction area and dry them to obtain dried saline soil samples.

[0009] S200, mix the dried saline soil sample with distilled water at a ratio of 1:10 to obtain a water-soil mixture solution;

[0010] S300 uses a portable conductivity meter to measure the conductivity of a water-soil mixture, and introduces a temperature parameter that causes the conductivity to change due to temperature during the measurement process to obtain the conductivity of the saline soil sample in the area to be constructed.

[0011] S400, using a rapid ion detection instrument to measure Cl in a water-soil mixture solution. – Ion content, SO4 2- The total salt content of the saline soil in the area to be constructed was calculated by taking into account the ion content and pH value, and combining the electrical conductivity of the saline soil sample.

[0012] S500 determines the degree and type of salinization of the saline soil in the area to be constructed based on the total salt content.

[0013] This invention provides a device for determining the degree and type of salinization of saline soil in road construction. The device includes:

[0014] A collection and processing device is used to select saline soil samples from the planned road construction area and dry them to obtain dried saline soil samples; the dried saline soil samples are mixed with distilled water at a ratio of 1:10 to obtain a water-soil mixture solution.

[0015] The conductivity measuring device is used to measure the conductivity of a water-soil mixture using a portable conductivity meter, and to obtain the conductivity of a saline soil sample from the area to be constructed by introducing a temperature parameter that causes the conductivity to change due to temperature during the measurement process.

[0016] A salinity measuring device used to measure the Cl content in a water-soil mixture. – Ion content, SO4 2- The total salt content of the saline soil in the area to be constructed was calculated by taking into account the ion content and pH value, and combining the electrical conductivity of the saline soil sample.

[0017] The feedback determination device is used to determine the degree and type of salinization of the saline soil in the area to be constructed based on the total salt content.

[0018] This invention provides a method for determining the degree and type of salinization of saline soil in road construction. First, a water-soil mixture containing saline soil from the area to be constructed is prepared. The conductivity of the water-soil mixture relative to the total salt content is measured, and a temperature factor is introduced into the measurement. The Cl- content of the water-soil mixture is then determined using a rapid ion detection instrument. – Ion content, SO4 2- The ion content is then used to calculate the chloride-sulfur ratio, and combined with electrical conductivity, to determine the type of saline soil, the degree of salinization, and the distribution of salt in the material field. This invention's ion measurement method replaces conventional tests for detecting ions of easily soluble salts. This invention can quickly and accurately determine the content and composition of soluble salts in alkaline saline soil, facilitating targeted measures by construction units to rationally utilize and improve the soil. It saves time and resources, reduces judgment costs, accelerates construction quality and progress, and improves project management, demonstrating significant economic and social benefits and promising application prospects. The invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] Figure 1 This is a flowchart illustrating a method for determining the degree and type of salinization in saline soil used in road construction, provided by the present invention.

[0020] Figure 2 This is a scatter plot showing the correlation between conductivity, salt content, and pH value provided by this invention.

[0021] Figure 3 This invention provides a fitted surface showing the correlation between conductivity, salt content, and pH value. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0023] like Figure 1 As shown, this invention provides a method for determining the degree and type of salinization of saline soil used in road construction, including:

[0024] S100, Select saline soil samples from the planned road construction area and dry them to obtain dried saline soil samples.

[0025] In a specific embodiment of the present invention, S100 includes:

[0026] S110, Select a number of soil samples from the planned road construction area and screen 100.00 grams of soil from the soil samples using a 0.1mm sieve; S120, Dry the screened soil samples to obtain dried soil samples.

[0027] S200, mix the dried saline soil sample with distilled water at a ratio of 1:10 to obtain a water-soil mixture solution;

[0028] In a specific embodiment of the present invention, S200 includes:

[0029] S210, Place the dried saline soil sample into a dry wide-mouth bottle with a volume greater than 1000ml;

[0030] S220: Add 1000ml of distilled water to a dry wide-mouth bottle at a ratio of 1:10 for the saline soil sample and distilled water, and stir thoroughly to fully dissolve the salt in the saline soil to obtain a water-soil mixture solution.

[0031] This invention allows for the on-site weighing of 100.00 grams of dried soil sample that has passed through a 0.1mm sieve, and its placement in a dry wide-mouth bottle with a volume ≥1000ml. To effectively address the time and effort required for on-site soil moisture content testing, a higher soil-to-water ratio of 1:10 is adopted compared to the traditional 1:5 ratio, thereby eliminating the influence of the soil's inherent moisture content on electrical conductivity testing.

[0032] S300 uses a portable conductivity meter to measure the conductivity of a water-soil mixture, and introduces a temperature parameter that causes the conductivity to change due to temperature during the measurement process to obtain the conductivity of the saline soil sample in the area to be constructed.

[0033] This invention measures the conductivity of soil leachate using a portable conductivity meter after the aqueous solution has stabilized. The conductivity value of the test solution is used to characterize the total salt content of the soil, thus expressing the degree of soil salinization. However, in the field measurement of conductivity of saline soil leachate, it is difficult to ensure that each measurement is conducted at the same ambient temperature. As a material composed of soil particles, water, salt solution, and gas, the conductivity of saline soil leachate is also affected by temperature. Therefore, the influence of temperature on the measured conductivity value must be considered.

[0034] S400, measuring the Cl- content in a water-soil mixture. – Ion content, SO4 2- The total salt content of the saline soil in the area to be constructed was calculated by taking into account the ion content and pH value, and combining the electrical conductivity of the saline soil sample.

[0035] In a specific embodiment of the present invention, S410, the chloride ion rapid analyzer, sulfate ion rapid analyzer, and pH meter are used to measure the water-soil mixture solution to obtain the chloride ion concentration of the water-soil mixture solution.– Ion content, SO4 2- Ion content and pH value;

[0036] S420, based on the Cl of the water-soil mixture solution – Ion content, SO4 2- The total salt content of the saline soil in the area to be constructed is calculated based on ion content, pH value, and electrical conductivity.

[0037] The S420 includes:

[0038] In a specific embodiment of the present invention, S421, based on the Cl of the water-soil mixture solution... – Ion content, SO4 2- Calculate the chloride-sulfur ratio based on ion content;

[0039] S422, based on the chloride-sulfur ratio, pH value, and electrical conductivity, the total salt content of the saline soil in the area to be constructed.

[0040] Total salt content is expressed as:

[0041]

[0042] Where Y is the total salt content; a is the conductivity value; b is the temperature; c is the chloride-sulfur ratio; and d is the pH value.

[0043] The correlation between the final measured total salt content, conductivity, and pH value can be found in [reference needed]. Figure 2 and Figure 3 As shown.

[0044] S500 determines the degree and type of salinization of the saline soil in the area to be constructed based on the total salt content.

[0045] After obtaining the conductivity, this invention uses a rapid chloride ion analyzer, a rapid sulfate ion analyzer, and a pH meter to determine the Cl– ions and SO42- in the test solution. 2- Ion content and pH are used instead of conventional tests for easily soluble salts to detect individual ions. After calculating the chloride-sulfur ratio, the type of saline soil can be determined according to the "Specifications for Design and Construction of Highway Subgrade in Xinjiang Saline Soil Areas".

[0046] In practical applications, this invention relies on the Wutong Daquan-Shaquanzi Expressway connecting line construction project. Samples of saline soil along the line were taken and 300 sets of field tests were conducted. The total salt content obtained by the calculation model was compared with the conventional value (the total salt content was determined according to the "Standard for Geotechnical Testing Methods"). The model accuracy reached 85%.

[0047] See Table 1, which provides error analysis data between the conductivity measured in this invention and the total salt content, and the actual value.

[0048] Table 1. Error Analysis Results

[0049]

[0050]

[0051] As shown in Table 1, the proportion of groups whose total salt content of alkaline saline soil calculated based on the model proposed in this invention has an error of less than 5% compared with the measured value is as high as 85%. This indicates that the calculation model proposed in this invention can more concisely and effectively calculate the total salt content and composition of alkaline saline soil. It can facilitate construction units to take targeted measures, make reasonable use of and improve the soil, save time and resources, reduce judgment costs, accelerate construction quality and progress, improve project management, and has obvious economic and social benefits, and has good application prospects.

[0052] This invention provides a device for determining the degree and type of salinization of saline soil in road construction. The device includes:

[0053] A collection and processing device is used to select saline soil samples from the planned road construction area and dry them to obtain dried saline soil samples; the dried saline soil samples are mixed with distilled water at a ratio of 1:10 to obtain a water-soil mixture solution.

[0054] The conductivity measuring device is used to measure the conductivity of a water-soil mixture using a portable conductivity meter, and to obtain the conductivity of a saline soil sample from the area to be constructed by introducing a temperature parameter that causes the conductivity to change due to temperature during the measurement process.

[0055] A salinity measuring device used to measure the Cl content in a water-soil mixture. – Ion content, SO4 2- The total salt content of the saline soil in the area to be constructed was calculated by taking into account the ion content and pH value, and combining the electrical conductivity of the saline soil sample.

[0056] The feedback determination device is used to determine the degree and type of salinization of the saline soil in the area to be constructed based on the total salt content.

[0057] In one specific embodiment of the present invention, the conductivity measuring device is equipped with a portable conductivity meter, the measuring end of which is inserted into the water-soil mixture to measure conductivity; the salinity measuring device is equipped with a rapid chloride ion meter, a rapid sulfate ion meter, and a pH meter to measure the Cl- content of the water-soil mixture. – Ion content, SO4 2- Ion content and pH value.

[0058] In one specific embodiment of the present invention, the feedback determination device can communicate with a smart device to provide feedback to the smart device on the degree and type of salinization of the saline soil in the area to be constructed.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0060] Although this application has been described herein in conjunction with various embodiments, those skilled in the art will understand and implement other variations of the disclosed embodiments by reviewing the accompanying drawings, the disclosure, and the appended claims in carrying out the claimed application. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality.

[0061] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A method for determining the degree and type of salinization of saline soil used in road construction, characterized in that, include: S100, Select saline soil samples from the planned road construction area and dry them to obtain dried saline soil samples. S200, mix the dried saline soil sample with distilled water at a ratio of 1:10 to obtain a water-soil mixture solution; S300, the conductivity of the water-soil mixture solution is measured using a portable conductivity meter, and the conductivity of the saline soil sample in the area to be constructed is obtained by introducing a temperature parameter that causes the conductivity to change due to temperature during the measurement process; S400, using a rapid ion detection instrument to measure the Cl- content in the water-soil mixture solution. – Ion content, SO4 2- The total salt content of the saline soil in the area to be constructed was calculated by taking into account the ion content and pH value, and combining the electrical conductivity of the saline soil sample. S500, determine the degree and type of salinization of the saline soil in the area to be constructed based on the total salt content; The S400 includes: S410, the chloride ion rapid analyzer, sulfate ion rapid analyzer, and pH meter were used to measure the chloride ion concentration of the water-soil mixture to obtain the chloride ion concentration of the water-soil mixture. – Ion content, SO4 2- Ion content and pH value; S420, based on the Cl of the water-soil mixture solution – Ion content, SO4 2- The total salt content of the saline soil in the area to be constructed is calculated based on ion content, pH value, and electrical conductivity. The S420 includes: S421, based on the Cl of the water-soil mixture solution – Ion content, SO4 2- Calculate the chloride-sulfur ratio based on ion content; S422, calculate the total salt content of the saline soil in the area to be constructed based on the chloride-sulfur ratio, pH value and electrical conductivity; S422 includes: ； in, Y 1. Total salt content; 2. Electrical conductivity; 3. Temperature; 4. Chlorine-to-sulfur ratio; 5. pH value.

2. The method for determining the degree and type of salinization of saline soil applied to road construction according to claim 1, characterized in that, S100 includes: S110, Select a certain amount of soil in the planned road construction area, and screen 100.00 grams of soil from the soil using a 0.1mm sieve. S120, the selected soil is dried in the sun to obtain a dried soil sample.

3. The method for determining the degree and type of salinization of saline soil applied to road construction according to claim 1, characterized in that, S200 includes: S210, Place the dried saline soil sample into a dry wide-mouth bottle with a volume greater than 1000ml; S220: Add 1000ml of distilled water to a dry wide-mouth bottle at a ratio of 1:10 for the saline soil sample and distilled water, and stir thoroughly to fully dissolve the salt in the saline soil to obtain a water-soil mixture solution.

4. A device for determining the degree and type of salinization of saline soil used in road construction, characterized in that, The determining device includes: A collection and processing device is used to select saline soil samples from the planned road construction area and dry them to obtain dried saline soil samples; the dried saline soil samples are mixed with distilled water at a ratio of 1:10 to obtain a water-soil mixture solution. The conductivity measuring device is used to measure the conductivity of the water-soil mixture solution using a portable conductivity meter, and to obtain the conductivity of the saline soil sample in the area to be constructed by introducing a temperature parameter that causes the conductivity to change due to temperature during the measurement process. A salinity measuring device is used to measure the Cl content of the water-soil mixture solution. – Ion content, SO4 2- The total salt content of the saline soil in the area to be constructed was calculated by taking into account the ion content and pH value, and combining the electrical conductivity of the saline soil sample. A feedback determination device is used to determine the degree and type of salinization of the saline soil in the area to be constructed based on the total salt content; Salt content measuring device, used for: S410, the chloride ion rapid analyzer, sulfate ion rapid analyzer, and pH meter were used to measure the chloride ion concentration of the water-soil mixture to obtain the chloride ion concentration of the water-soil mixture. – Ion content, SO4 2- Ion content and pH value; S420, based on the Cl of the water-soil mixture solution – Ion content, SO4 2- The total salt content of the saline soil in the area to be constructed is calculated based on ion content, pH value, and electrical conductivity. The S420 includes: S421, based on the Cl of the water-soil mixture solution – Ion content, SO4 2- Calculate the chloride-sulfur ratio based on ion content; S422, calculate the total salt content of the saline soil in the area to be constructed based on the chloride-sulfur ratio, pH value and electrical conductivity; S422 includes: ； in, Y 1. Total salt content; 2. Electrical conductivity; 3. Temperature; 4. Chlorine-to-sulfur ratio; 5. pH value.

5. The device for determining the degree and type of salinization of saline soil applied to road construction according to claim 4, characterized in that, The conductivity measuring device is equipped with a portable conductivity meter, the measuring end of which is inserted into the water-soil mixture to measure conductivity. The salinity measuring device is equipped with a rapid chloride ion meter, a rapid sulfate ion meter, and a pH meter to measure the Cl- content of the water-soil mixture. – Ion content, SO4 2- Ion content and pH value.

6. The device for determining the degree and type of salinization of saline soil applied to road construction according to claim 4, characterized in that, The feedback determination device can communicate with intelligent devices to provide feedback to the intelligent devices on the degree and type of salinization of the saline soil in the area to be constructed.

Images