CN-121977982-A - Comprehensive evaluation method and device for durability of cemented sand gravel

CN121977982ACN 121977982 ACN121977982 ACN 121977982ACN-121977982-A

Abstract

The invention provides a method and a device for comprehensively evaluating durability of cemented sand gravel, wherein the method and the device are used for calculating the configuration strength of the cemented sand gravel according to engineering to obtain a molded cemented sand gravel test piece, and carrying out working test, compressive strength and elastic modulus test on the molded cemented sand gravel test piece, and carrying out comprehensive evaluation on the durability by the configuration strength after the test piece passes the working test, the compressive strength and the elastic modulus test. And (3) configuring a test piece, and respectively carrying out quantitative test on anti-seepage and anti-corrosion performance, anti-abrasion performance and anti-freezing performance on the test piece and the actual piece to obtain a first test result, a second test result and a third test result. And carrying out weighted calculation on the three test results, and if the result is larger than a preset standard value, the durability of the actual part meets the requirement. The quantitative evaluation method has the advantages that the quantitative evaluation of specific numerical values can be carried out on the performance of the construction part in actual use, and furthermore, constructors can effectively screen the construction part according to the evaluation result, and the evaluation is not carried out only according to experimental trends.

Inventors

WANG WENTAO
JIA BAOZHEN
GUO YETAO
YANG HUICHEN
ZHENG CUIYING
JIA JINSHENG
SHANG YANJIE
ZHENG LIFENG
ZHANG XU
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 comprehensively evaluating durability of cemented sand gravel, the method comprising: calculating the configuration strength of the cemented sand gravel according to engineering to obtain a formed cemented sand gravel test piece, and carrying out working test, compressive strength and elastic modulus test on the formed cemented sand gravel test piece, and carrying out comprehensive durability evaluation according to the configuration strength after the formed cemented sand gravel test piece passes the working test, the compressive strength and the elastic modulus test; Configuring a test piece, quantitatively testing the anti-permeability and anti-corrosion performance of the test piece, quantitatively testing the anti-permeability and anti-corrosion performance of an actual piece, and comparing the anti-permeability and anti-corrosion performance of the actual piece with the anti-permeability and anti-corrosion performance of the actual piece to obtain a first test result; Performing an anti-abrasion performance test on the test piece, and performing an anti-abrasion performance test on the actual piece, wherein a second test result is obtained when the anti-abrasion performance test is compared with the actual piece; Carrying out an anti-freezing performance test on the test piece, and also carrying out an anti-freezing performance test on the actual piece, wherein a third test result is obtained when the anti-freezing performance test is carried out on the actual piece and the actual piece; And carrying out weighted calculation on the first test result, the second test result and the third test result, and if the result is larger than a preset standard value, the durability of the actual part meets the requirement.
2. The evaluation method according to claim 1, wherein the performing durability integrated evaluation with the configured strength after the passing includes: grading the site material based on the configuration strength, obtaining average grading according to grading results, and designing a sand gravel grading envelope line comprising coarsest grading, finest grading and average grading; and configuring the test piece according to the finest grading, and performing the quantitative test of the anti-seepage and anti-corrosion performance, the anti-abrasion performance and the anti-freezing performance.
3. The method of evaluating according to claim 1, wherein the quantitatively testing the test piece for the anti-permeability and anti-corrosion performance and quantitatively testing the actual piece for the anti-permeability and anti-corrosion performance, and comparing the two results to obtain a first test result, comprises: Performing anti-permeability and anti-corrosion measurement on the test piece to obtain an accumulated osmotic coefficient, a segmented osmotic coefficient and calcium ion dissolution concentration; The method comprises the steps of carrying out actual production, obtaining an actual piece, carrying out pressurized permeation by adopting deionized water, and obtaining the accumulated osmotic coefficient, the sectional osmotic coefficient and the calcium ion dissolution concentration of the actual piece, wherein the ratio obtained by comparing the value/average value of the calcium ion concentration of the actual piece 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 sectional osmotic coefficient are used as the association degree; Performing data processing on the accumulated permeability coefficient and/or the segmented permeability coefficient corresponding to the relevance and the test piece to obtain another calcium ion concentration of the actual piece, so as to obtain an anti-corrosion measurement evaluation result of the actual piece, wherein if the calcium ion concentration is smaller than the calcium ion concentration in the test piece, the calcium ion concentration accords with an anti-corrosion measurement standard, and the calcium ion concentration can be used as the first test result; If the ratio is obtained according to the time period, the anti-corrosion measurement evaluation result of the actual piece in the 300d-600d time period is lower than half of the average value of the calcium ion concentration of the test piece in the 300d-600d time period, the anti-corrosion measurement standard is met, and the first test result can be obtained.
4. The method of evaluating according to claim 1, wherein the performing an abrasion resistance test on the test piece and further performing an abrasion resistance test on an actual piece, in comparison with the two, results in a second test result, comprises: and adopting an anti-abrasion test device to respectively test the anti-abrasion performance of the test piece and the actual piece, if the test result of the actual piece is better than that of the test piece, the test result of the actual piece is a second test result, otherwise, the actual piece is produced again.
5. The method of claim 1, wherein the performing the antifreeze performance test on the test part and the antifreeze performance test on the actual part, in comparison, results in a third test result, comprises: Sequentially performing a pulping vibration forming test and an anti-freezing performance test after pulping the test piece at different pulping rates to obtain test results at least comprising compressive strength, split tensile strength and a relative moving elastic die; Sequentially performing a pulping vibration forming test and an anti-freezing performance test after pulping the actual piece with the same pulping rate to obtain a test result at least comprising compressive strength, split tensile strength and a relative moving elastic die; Comparing the two groups of test results, if each test result of the actual piece is better than the test result of the test piece, obtaining the third test result, otherwise, re-producing the actual piece.
6. The evaluation method according to claim 1, wherein the weight calculation is performed on the first, second, and third test results, and if the result is greater than a standard value, the durability of the molded cemented sand gravel test piece satisfies a requirement, comprising: And weighting an average value of two ratios of the association degree in the first test result, an anti-abrasion strength value in the second test result and a relative moving elastic modulus in the third test result, and if the result is larger than a preset standard value, the durability of the actual part meets the requirement.
7. A comprehensive evaluation apparatus for durability of cemented sand gravel for implementing the method according to any one of claims 1 to 6, comprising: The test piece production unit is used for calculating the configuration strength of the cemented sand gravel according to engineering to obtain a formed cemented sand gravel test piece, carrying out working test, compressive strength and elastic modulus test on the formed cemented sand gravel test piece, carrying out comprehensive durability evaluation on the configuration strength after the formed cemented sand gravel test piece passes through the test piece, grading on site materials based on the configuration strength, 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, and configuring the test piece according to the finest grading; The device comprises a test piece production unit, an actual measurement unit, an anti-abrasion performance test unit, an anti-freezing performance test unit and a third test result, wherein the test piece production unit is used for quantitatively testing the anti-permeability and anti-corrosion performance of a test piece; And the calculation evaluation unit is used for carrying out weighted calculation according to the first test result, the second test result and the third test result obtained by the actual measurement unit, and if the result is larger than a preset standard value, the durability of the actual piece meets the requirement.
8. The evaluation device according to claim 7, wherein the actual measurement unit comprises: The test piece measuring module is used for carrying out impervious and anti-corrosion measurement on the test piece produced in the test piece production unit to obtain an accumulated permeability coefficient, a segmented permeability coefficient and calcium ion dissolution concentration, carrying out anti-wear performance test on the test piece to obtain anti-wear strength, carrying out anti-freezing performance test on the test piece, and sequentially carrying out pulping vibration forming test and anti-freezing performance test after pulping the test piece at different pulping rates to obtain a test result at least comprising compression strength, split tensile strength and a relative movable elastic die; the production module is used for producing a component actually used for construction according to the grading result in the test piece production unit to obtain an actual piece; The first test result acquisition module is used for carrying out pressurized permeation on the actual piece produced by the production module by adopting deionized water to acquire the accumulated permeation coefficient, the sectional permeation coefficient and the calcium ion leaching concentration of the actual piece; the ratio obtained by comparing the value/average value of the calcium ion concentration of the actual piece with the value/average value of the accumulated osmotic coefficient in 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; performing data processing on the accumulated permeability coefficient and/or the segmented permeability coefficient corresponding to the correlation degree and the test piece to obtain another calcium ion concentration of the actual piece, so as to obtain an anti-corrosion measurement evaluation result of the actual piece, wherein the anti-corrosion measurement evaluation result of the actual piece in the 300d-600d time period is lower than half of the average value of the calcium ion concentration of the test piece in the 300d-600d time period if the calcium ion concentration is smaller than the calcium ion concentration in the test piece and meets the anti-corrosion measurement standard if the calcium ion concentration is smaller than the calcium ion concentration in the test piece, and the anti-corrosion measurement evaluation result can be used as the first test result; The second test result acquisition module is used for carrying out an anti-abrasion performance test on the actual piece by adopting an anti-abrasion test device, comparing the anti-abrasion performance test result of the actual piece with the anti-abrasion performance test result obtained by the test piece measurement module, if the test result of the actual piece is better than that of the test piece, the test result of the actual piece is the second test result, otherwise, the actual piece is produced again; And the third test result acquisition module is used for sequentially carrying out a pulping vibration forming test and an anti-freezing performance test after the actual piece is pulped according to the pulping rate adopted by the test piece measurement module to obtain test results at least comprising compressive strength, tensile strength and relative elastic modulus, and comparing the two groups of test results, wherein if each test result of the actual piece is better than the test result of the test piece, the third test result is obtained, otherwise, the actual piece is produced again.
9. The evaluation device according to claim 8, wherein the calculation evaluation unit is specifically configured to perform weight calculation on an average value of two ratios of the correlation degrees acquired by the first test result acquisition module, perform weight calculation on an abrasion resistance value in the second test result acquired by the second test result acquisition module, perform weight calculation on relative elastic modulus in the third test result acquired by the third test result acquisition module, and add three weight results.
10. The evaluation device according to claim 9, wherein the calculation evaluation unit is further configured to determine whether the three weight addition results are greater than a preset standard value, and if so, satisfy the requirement.

Description

Comprehensive evaluation method and device for durability of cemented sand gravel Technical Field The invention relates to the field of cemented sand gravel testing, in particular to a method and a device for comprehensively evaluating the durability of 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, the water stop and drainage arrangement and the detail structure in the dam body are realized, and the pressure resistance design and the seepage prevention and impact prevention durability design are realized. In the process of designing durability, the performance of resisting penetration, erosion, abrasion and freezing is required to be evaluated, but in the prior art, the trends of the performances can only be respectively estimated by combining the local environment and the material characteristics, and then some possibilities can be estimated according to the estimated results, so that the comprehensive quantitative evaluation of the performances cannot be performed, and therefore, how to accurately evaluate the durability of the cemented sand gravel is a problem to be solved urgently. Disclosure of Invention The invention provides a comprehensive evaluation method and device for durability of cemented sand gravel, which are used for solving the problem that the comprehensive quantitative evaluation of the performances cannot be carried out only by combining local environment and material characteristics to estimate the tendency of the performances in the prior art. In order to achieve the above purpose, the technical scheme of the invention provides a comprehensive evaluation method for durability of cemented sand and gravel, which comprises the steps of calculating the configuration strength of the cemented sand and gravel according to engineering to obtain a molded cemented sand and gravel test piece, and carrying out working test, compressive strength and elastic modulus test on the molded cemented sand and gravel test piece, wherein the durability is comprehensively evaluated according to the configuration strength after the test piece passes the working test, the compressive strength and the elastic modulus test. And configuring a test piece, quantitatively testing the anti-permeability and anti-corrosion performance of the test piece, quantitatively testing the anti-permeability and anti-corrosion performance of an actual piece, and comparing the anti-permeability and anti-corrosion performance of the actual piece with the anti-permeability and anti-corrosion performance of the actual piece to obtain a first test result. And performing an anti-abrasion performance test on the test piece, and performing an anti-abrasion performance test on the actual piece, wherein a second test result is obtained when the anti-abrasion performance test is compared with the actual piece. And carrying out an anti-freezing performance test on the test piece, and also carrying out an anti-freezing performance test on the actual piece, wherein a third test result is obtained when the anti-freezing performance test is carried out on the actual piece and the actual piece. And carrying out weighted calculation on the first test result, the second test result and the third test result, and if the result is larger than a preset standard value, the durability of the actual part meets the requirement. Preferably, the comprehensive evaluation of durability by the configuration strength compri