CN-121977958-A - Corrosion-resistant quantitative measurement method and device for cemented sand gravel

CN121977958ACN 121977958 ACN121977958 ACN 121977958ACN-121977958-A

Abstract

The invention provides an anti-corrosion quantitative measurement method and device for cemented sand gravel, which comprises the steps of preparing theoretical materials according to the condition of field materials, carrying out anti-corrosion measurement on a theoretical test piece to obtain a theoretical experiment result, carrying out actual production, obtaining a test piece to be tested, carrying out pressurized permeation by deionized water to obtain a permeation coefficient and calcium ion dissolution concentration, calculating the permeation coefficient and the calcium ion dissolution concentration of the test piece to be tested in different time periods, carrying out data processing on the permeation coefficient and the calcium ion dissolution concentration of the test piece to be tested to obtain the correlation between parameters, and carrying out processing on the correlation and the theoretical experiment result to obtain an anti-corrosion measurement result of a final test piece to be tested. The method has the advantages that the relation between the permeability coefficient of the test piece to be tested and the dissolution concentration of calcium ions in actual production is obtained, the relation is compared with experimental data after calculation, and whether the test piece to be tested meets the result of the corrosion resistance measurement standard or not is judged according to the quantized comparison result, so that the problem that the corrosion resistance performance of the cemented sand gravel cannot be quantitatively evaluated in the prior art is solved.

Inventors

ZHU ZHONGPING
GUO YETAO
YANG HUICHEN
SHANG YANJIE
ZHENG CUIYING
LI ANG
JIA JINSHENG
ZHENG LIFENG
LI AILI
HAN RUIKUN

Assignees

国能大渡河流域水电开发有限公司枕沙水电建设管理分公司
中国水利水电科学研究院

Dates

Publication Date: 20260505
Application Date: 20250530
Priority Date: 20241209

Claims (10)

1. A method for quantitatively measuring erosion resistance of cemented sand gravel, the method comprising: according to the condition of the field material, configuring a theoretical material, and carrying out corrosion resistance measurement on the theoretical test piece to obtain a theoretical experiment result; performing actual production, obtaining a test piece to be tested, and performing pressurized permeation by adopting deionized water to obtain a permeation coefficient and calcium ion dissolution concentration; Calculating the permeability coefficient and the calcium ion dissolution concentration of the test piece to be tested in different time periods, and carrying out data processing on the permeability coefficient and the calcium ion dissolution concentration to obtain the correlation degree between parameters; and carrying out data processing on the association degree and the theoretical experiment result to obtain the finally anti-corrosion measurement result of the test piece to be tested.
2. The quantitative measurement method according to claim 1, comprising: Grading the site material, obtaining average grading according to grading results, and designing a sand gravel grading envelope curve comprising the coarsest grading, the finest grading and the average grading; Respectively configuring theoretical materials corresponding to the finest grading, the finest grading and the average grading, and respectively performing corrosion resistance measurement to obtain theoretical experiment results; And selecting the data with the worst theoretical experiment result as the theoretical experiment result for subsequent quantitative measurement.
3. The quantitative measurement method according to claim 1, wherein the obtained osmotic coefficient and the calcium ion elution amount: Q is infiltration water flow, m 3 /s, L is standard test piece height, m, A is infiltration cross-sectional area, m 2 , H is acting water head, m, K is test piece permeability coefficient, m/s; The dissolution amount of Ca 2+ in the cemented sand gravel material is determined by a chemical titration method, EDTA is used as a standard reagent solution, and the concentration is 0.0271mol/L.
4. The quantitative measurement method according to claim 1, wherein the calculating the permeability coefficient and the calcium ion dissolution concentration of the test piece to be measured in different time periods and performing data processing on the two to obtain the correlation between the parameters comprises: acquiring each accumulated permeability coefficient of the test piece to be tested in a measurement time period; Obtaining each sectional permeability coefficient of the test piece to be tested in a measurement time period; And the ratio obtained by comparing the value/average value of the calcium ion concentration with the value/average value of the accumulated osmotic coefficient at the same moment/time period and the ratio obtained by comparing the value/average value of the segmented osmotic coefficient are used as the association degree.
5. The quantitative measurement method according to claim 4, wherein the step of performing data processing on the correlation degree and the theoretical experiment result to obtain an anti-corrosion measurement result of the test piece to be measured finally comprises the steps of: performing data processing on the correlation and the corresponding accumulated permeability coefficient and/or segmented permeability coefficient in the theoretical experiment result to obtain the other calcium ion concentration of the test piece to be tested, thereby obtaining a final corrosion resistance measurement evaluation result, and if the calcium ion concentration is smaller than the calcium ion concentration in the theoretical experiment result, conforming to the corrosion resistance measurement standard; If the ratio is obtained according to the time period, the anti-corrosion measurement evaluation result of the test piece to be tested in the 300d-600d time period is lower than half of the average value of the calcium ion concentration in the 300d-600d time period in the theoretical experiment, and the anti-corrosion measurement standard is met.
6. An apparatus for quantitative measurement of erosion resistance of cemented sand gravel, said apparatus comprising: The theoretical experiment result acquisition unit is used for configuring theoretical materials according to the situation of the field materials, and performing corrosion resistance measurement on the theoretical test piece to obtain a theoretical experiment result; the actual data acquisition unit is used for acquiring a test piece to be tested, and performing pressurized permeation by adopting deionized water to acquire a permeation coefficient and calcium ion dissolution concentration; the association degree acquisition unit is used for calculating the osmotic coefficient and the calcium ion dissolution concentration of the test piece to be tested in different time periods according to the actual data acquisition unit, and carrying out data processing on the osmotic coefficient and the calcium ion dissolution concentration to obtain the association degree between parameters of the test piece to be tested; and the measurement result acquisition unit is used for carrying out data processing on the association degree acquired by the association degree acquisition unit and the theoretical experiment result acquired by the theoretical experiment result acquisition unit to obtain an anti-corrosion measurement result of the test piece to be tested finally.
7. The measurement device according to claim 6, wherein the theoretical experiment result acquisition unit includes: The grading module is used for grading the site material, obtaining average grading according to grading results, and designing a sand gravel grading envelope line comprising the coarsest grading, the finest grading and the average grading; and the experimental module is used for carrying out corrosion resistance measurement according to the finest grading configuration theoretical material in the grading module to obtain the theoretical experimental result.
8. The measurement device according to claim 6, wherein the correlation acquisition unit is configured to calculate the permeability coefficient and the calcium ion elution amount according to the following formula: Q is infiltration water flow, m 3 /s, L is standard test piece height, m, A is infiltration cross-sectional area, m 2 , H is acting water head, m, K is test piece permeability coefficient, m/s; And the method is also used for obtaining the dissolution amount of Ca 2+ , the dissolution amount of Ca 2+ in the cemented sand gravel material is determined by a chemical titration method, EDTA is used as a standard reagent solution, and the concentration is 0.0271mol/L.
9. The measurement device according to claim 6, wherein the association degree acquiring unit includes: The accumulated permeability coefficient acquisition module is used for acquiring each accumulated permeability coefficient of the test piece to be tested in the measurement time period; The segmented permeability coefficient acquisition module is used for segmenting the measurement time period and acquiring the segmented permeability coefficient of the test piece to be measured in each time period; The correlation degree obtaining unit is used for obtaining a ratio of the average value of the calcium ion concentration in the same moment/time period compared with the average value of the accumulated osmotic coefficient obtained by the accumulated osmotic coefficient obtaining module and a ratio of the average value of the segmented osmotic coefficient obtained by the segmented osmotic coefficient obtaining module as the correlation degree.
10. The measurement device according to claim 9, wherein the measurement result acquisition unit includes: the calculation module is used for carrying out data processing on the association degree acquired by the association degree acquisition unit and the corresponding accumulated permeability coefficient and/or segmented permeability coefficient in the theoretical experiment result to acquire the concentration of the other calcium ion of the test piece to be tested; and the comparison module is used for comparing the calcium ion concentration calculated by the calculation module with a standard, if the calcium ion concentration is smaller than the calcium ion concentration in the theoretical experiment result, the standard is met, and if the ratio is obtained according to the time period, the corrosion resistance measurement evaluation result of the test piece to be tested in the 300d-600d time period is lower than half of the average value of the calcium ion concentration in the theoretical experiment in the 300d-600d time period, and the corrosion resistance measurement standard is met.

Description

Corrosion-resistant quantitative measurement method and device for cemented sand gravel Technical Field The invention relates to the field of cemented sand gravel testing, in particular to an anti-corrosion quantitative measurement method and device for cemented sand gravel. Background The cemented sand gravel (CEMENTED SAND GRAVEL AND Rock, abbreviated as CSGR) is a dam construction technology, widens the application range of raw materials, and has the design concept of "suitable material" and "suitable material suitable structure". The cemented gravel dam is a new dam model between earth-rock dams and roller compacted concrete dams. Based on the research and practice of the existing cemented gravel dam, the method has the following characteristics of safety, economy, construction simplicity and environment friendliness. The body shape design of the cemented gravel dam fully utilizes local materials and 'material-suitable adaptation', namely, the most suitable materials are selected for different parts of the dam body so as to ensure the structural performance. And constructing a functional gradient structure, and adopting high-performance materials such as slurry-rich or slurry-added vibration cemented sand and gravel, normal concrete and the like at the parts which are distributed in the tensile stress area and have the anti-seepage and anti-freezing requirements, and enabling the internal cemented sand and gravel to be in a pressed state through structural design. In actual construction, the structure calculation is generally carried out on the position using the cemented sand gravel material to obtain stress distribution and temperature stress distribution, the basic treatment mode is determined, the cross section size of the dam body is determined, the dam body is partitioned, the cofferdam structure is controlled by temperature, and the water stop and drainage arrangement, the detail structure and the seepage prevention and impact prevention design in the dam body are realized. In the process of designing the anti-penetration and anti-impact, the corrosion resistance needs to be evaluated, but in the prior art, the corrosion resistance can only be evaluated according to the local environment and the material characteristics, and the quantitative evaluation of the corrosion resistance can not be performed, so how to provide a method capable of accurately evaluating the corrosion resistance of the cemented sand gravel is a problem to be solved. Disclosure of Invention The invention provides a quantitative measuring method and device for corrosion resistance of cemented sand gravel, which are used for solving the problem that the corrosion resistance of the cemented sand gravel cannot be quantitatively evaluated in the prior art. In order to achieve the above purpose, the technical scheme of the invention provides an anti-corrosion quantitative measurement method of cemented sand gravel, which comprises the steps of preparing theoretical materials according to the condition of field materials, carrying out anti-corrosion measurement on a theoretical test piece to obtain a theoretical experiment result, carrying out actual production, obtaining a test piece to be tested, carrying out pressurized permeation by deionized water to obtain a permeation coefficient and a calcium ion dissolution concentration, calculating the permeation coefficient and the calcium ion dissolution concentration of the test piece to be tested in different time periods, carrying out data processing on the permeation coefficient and the calcium ion dissolution concentration to obtain a parameter association degree of the test piece to be tested, and carrying out data processing on the parameter association degree and the theoretical experiment result to obtain an anti-corrosion measurement result of the test piece to be tested finally. As the optimization of the technical scheme, the on-site materials are graded, average grading is obtained according to grading results, sand gravel grading envelope curves comprising coarsest grading, finest grading and average grading are designed, theoretical materials corresponding to the finest grading, the finest grading and the average grading are respectively configured, corrosion resistance measurement is respectively carried out on the theoretical materials to obtain theoretical experiment results, and worst data of the theoretical experiment results are selected to serve as theoretical experiment results for follow-up quantitative measurement. As a preferable mode of the above technical solution, preferably, the permeability coefficient is obtained: Q is infiltration water flow, m 3/s, L is standard test piece height, m, A is infiltration cross-sectional area, m 2, H is acting water head, m, K is test piece permeability coefficient, m/s; The dissolution amount of Ca 2+ in the cemented sand gravel material is determined by a chemical titration method, EDTA is used as a standard reagent solu