CN105738258A - Detection method for anti-filtration capability of vegetation concrete - Google Patents

Detection method for anti-filtration capability of vegetation concrete Download PDF

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Publication number
CN105738258A
CN105738258A CN201610126839.9A CN201610126839A CN105738258A CN 105738258 A CN105738258 A CN 105738258A CN 201610126839 A CN201610126839 A CN 201610126839A CN 105738258 A CN105738258 A CN 105738258A
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China
Prior art keywords
soil
concrete
test
ability
worry
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CN201610126839.9A
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赵玉青
宗秋果
邢毅
陈希
王静
王丽梅
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North China University of Water Resources and Electric Power
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North China University of Water Resources and Electric Power
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/02Investigating particle size or size distribution
    • G01N15/0272Investigating particle size or size distribution with screening; with classification by filtering

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Revetment (AREA)

Abstract

The invention discloses a detection method for the anti-filtration capability of vegetation concrete. The method comprises the following specific steps: 1, selecting and drying soil on a bank slope; 2, pouring dry soil test blocks into test sieves, sufficiently jolting the test sieves on a standard jolting sieve shaker, weighing the mass of the soil left on the test sieves of each aperture stage, and calculating the accumulated mass of the soil left on the test sieves, the mass percentages of the soil smaller than the apertures and the total mass percentages of the soil smaller than the apertures; 3, drawing a soil particle size distribution curve chart according to the test data, and calculating a uniformity coefficient and curvature coefficient of soil particles according to the soil particle size distribution curve chart; 4, estimating the anti-filtration capability; 5, performing data analysis. The method is scientific in principle, easy to operate and accurate in test data, site construction links can be reduced, site operation time can be shortened, adaptability to various site construction conditions can be ensured, construction quality and engineering effects can also be improved, and popularization of an ecological concrete bank protection technology is facilitated.

Description

The anti-ability of the worry detection method of concrete for plant growth
Technical field
The invention belongs to concrete revetment technical field, be specifically related to a kind of anti-ability of worry detection method of concrete for plant growth.
Background technology
Sediment Siltation, riverbed lifting, Lower Reaches of The Yellow River gradually becomes canal on embankment, for safety the continuous fill Shu Shui of people.But, the scour of bank slope is often resulted in river levee and caves in by current, and the erosion of bank slope is frequently resulted in again bank slope soil erosion by heavy showers.To this, people have to river levee is taked hardening shore protection measure, protect Seawall safety.Traditional concrete revetment engineering, main consideration river course antiscour and bank stability, less consideration eco environment facto.The construction adopted, one is cast-in-place concrete panel, and two is pave concrete prefabricated board.The consequence of two kinds of construction methods is to define large-area concrete slab gallery on the soil matrix of two sides, river course.These hard gallery structures, hinder the performance of Riparian Zone biology habitat function, destroy the original ecosystem in river.
Eco-concrete shore protection technology, studies in China is relatively fewer, and its application has two kinds of forms, one is cast-in-place grid ecological revetment technology, and it is formwork supporting plate on Channel slope, the cast in situs armored concrete lattice ridge, side slope is divided into some block grids by the lattice ridge, then plants vegetation in grid and afforests.This form advantage is that yardstick is big, and vegetation survival rate and coverage rate are high, and shortcoming is that site operation needs power supply, water source, it is desirable to place is open and flat open, and additionally this form anti-heavy showers scouring capability is poor;Another kind of form is concrete orifice plate or concrete hollow block, is lay concrete orifice plate or hollow brick on river course bank slope, then afforests at the hole heart or hollow interior plantation vegetation.The advantage of this form is that place adaptive capacity is good, and shortcoming is that green percentage is low, and anti-heavy showers scouring capability is poor.In order to improve anti-heavy showers scouring capability, it is possible to adopt plant-growing type eco-concrete.This form is mainly made up of celluar concrete, water-keeping material, slightly soluble fertilizer and topsoil.Topsoil is laid on cellular concrete surface, forms vegetation germination space, provides the nutrient that vegetation germinates the initial stage simultaneously.But this form needs also exist for poured in place concrete, it is necessary to there are power supply, water source in scene, it is necessary to appointed condition, and construction quality be not easy ensure.
Summary of the invention
The present invention is to solve weak point of the prior art, it is provided that a kind of cost is low, place adaptive capacity is good, can carry out heavy showers scouring capability prefabricated, anti-strong, can improve the anti-ability of the worry detection method of concrete for plant growth of construction quality.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that
The anti-ability of the worry detection method of concrete for plant growth, comprises the following steps:
1., choose the soil at bank slope place, first reject the garbage of soil internal interference result of the test, rubbish, then high-quality soil is put into drying in oven;
2., dry after start dry ground earth is tested, fetch earth when soil maximum particle diameter is lower than 40mm 2000 ~ 4000g, does two groups to reduce this test of error, and often group fetches earth 3000g;3000g dry ground earth test block is poured in the testing sieve folded according to pore size, laboratory jarring formula standard vibrating sieving machine fully jolts 10min, weigh up afterwards and stay the quality of soil on pore size testing sieve at different levels, calculate and add up to stay sieve soil property amount, the native mass percent less than this aperture and the always soil mass percent less than this aperture;
3., according to above-mentioned test data, soil particle size distribution curve chart is drawn, and according to soil anti-erosion curve and formulaWithCalculate the nonuniformity coefficient of soil particleAnd coefficient of curvature;Wherein: on soil particle size distribution curve chart, d10The particle diameter of 10%, d is accounted for for weight of sieving60The particle diameter of 60%, d is accounted for for weight of sieving30The particle diameter of 30% is accounted for for weight of sieving;
4., eco-concrete self need possess a degree of anti-worry ability, anti-worry ability can be estimated by following formula:
In this formula: D aggregate mean diameter, unit mm;
Eco-concrete composite construction protection soil body characteristic diameter, unit mm;
5., the anti-numerical value considering ability exceeds the scope of desirable 9 20, illustrate that the anti-worry ability of this test sand-free coarse porous concrete eco-concrete is poor, when being applied to bank-protection works water level with lower part, under running into fluctuation in stage situation of change, rely on self can not play and well consider soil drainage effect, it is necessary to loaded filter is set.
Adopt technique scheme, by the performance of concrete for plant growth is tested, and result of the test is analyzed, and feed back to choosing and proportioning of each raw material of concrete for plant growth analyzing result, to ensure the concrete quality that bank protection adopts.This concrete for plant growth can be prefabricated in the factory plant-growing type eco-concrete plate, prefabricated Nutrition Soil, prefabricated vegetation turf, then arrives on-site consolidation concrete sash, fills eco-concrete plate, lays Nutrition Soil, and plantation turf vegetation can complete construction task.
As can be seen here, principle of the invention science, easily operated, test accurate data, extending to construction operation innovation is, the method fabrication of concrete lattice ridge, plant-growing type eco-concrete plate, Nutrition Soil and the turf that all employing is prefabricated, then arrives on-site consolidation.So, site operation link can be reduced, compress the field operation time, adapt to various construction condition, construction quality and engineering effort can be made again to improve, it is simple to promote concrete ecological shore protection technology.
Accompanying drawing illustrates:
Fig. 1 is soil particle size distribution curve chart.
Detailed description of the invention
The anti-ability of the worry detection method of concrete for plant growth of the present invention, comprises the following steps:
1., choose the soil at bank slope place, first reject the garbage of soil internal interference result of the test, rubbish, then high-quality soil is put into drying in oven;
2., dry after start dry ground earth is tested, fetch earth when soil maximum particle diameter is lower than 40mm 2000 ~ 4000g, does two groups to reduce this test of error, and often group fetches earth 3000g;3000g dry ground earth test block is poured in the testing sieve folded according to pore size, laboratory jarring formula standard vibrating sieving machine fully jolts 10min, weigh up afterwards and stay the quality of soil on pore size testing sieve at different levels, calculate and add up to stay sieve soil property amount, the native mass percent less than this aperture and the always soil mass percent less than this aperture;The result of soil science and technology size sieve test is as shown in table 1;
Table 1 soils particles size percent content sieve test result
3., according to the test data in table 1, drawing soil particle size distribution curve chart (as shown below), as can be seen from the figure the soil anti-erosion curve of test group 1 and test group 2 is close to and overlaps, and according to soil anti-erosion curve and formulaWithCalculate the nonuniformity coefficient of soil particleAnd coefficient of curvature, result of calculation is as shown in table 2;Wherein: on soil particle size distribution curve chart, d10The particle diameter of 10%, d is accounted for for weight of sieving60The particle diameter of 60%, d is accounted for for weight of sieving30The particle diameter of 30% is accounted for for weight of sieving;
Table 2 soil particle nonuniformity coefficient and curvature--coefficient
4., eco-concrete self need possess a degree of anti-worry ability, anti-worry ability can be estimated by following formula:
(1)
In this formula: D aggregate mean diameter, unit mm;
Eco-concrete composite construction protection soil body characteristic diameter, unit mm;
Data show, the nonuniformity coefficient of soilIt is 5.6 and 5.0, is all not less than 5.Coefficient of curvatureIt is 1.4, between 13.Visible, soil is the nonhomogeneous soil that grating is good.D is taken 30mm,Substitute into formula (1) equal to 0.42, the anti-worry capability result calculating soil is 71.
5., the anti-numerical value considering ability exceeds the scope of desirable 9 20, illustrate that the anti-worry ability of this test sand-free coarse porous concrete eco-concrete is poor, when being applied to bank-protection works water level with lower part, under running into fluctuation in stage situation of change, rely on self can not play and well consider soil drainage effect, it is necessary to loaded filter is set.
Above example is only in order to illustrative not limiting technical scheme, although the present invention being described in detail with reference to above-described embodiment, it will be understood by those within the art that: still the present invention can be modified or equivalent replacement, without deviating from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of scope of the presently claimed invention.

Claims (1)

1. the anti-ability of the worry detection method of concrete for plant growth, it is characterised in that: comprise the following steps:
1., choose the soil at bank slope place, first reject the garbage of soil internal interference result of the test, rubbish, then high-quality soil is put into drying in oven;
2., dry after start dry ground earth is tested, fetch earth when soil maximum particle diameter is lower than 40mm 2000 ~ 4000g, does two groups to reduce this test of error, and often group fetches earth 3000g;3000g dry ground earth test block is poured in the testing sieve folded according to pore size, laboratory jarring formula standard vibrating sieving machine fully jolts 10min, weigh up afterwards and stay the quality of soil on pore size testing sieve at different levels, calculate and add up to stay sieve soil property amount, the native mass percent less than this aperture and the always soil mass percent less than this aperture;
3., according to above-mentioned test data, soil particle size distribution curve chart is drawn, and according to soil anti-erosion curve and formulaWithCalculate the nonuniformity coefficient of soil particleAnd coefficient of curvature;Wherein: on soil particle size distribution curve chart, d10The particle diameter of 10%, d is accounted for for weight of sieving60The particle diameter of 60%, d is accounted for for weight of sieving30The particle diameter of 30% is accounted for for weight of sieving;
4., eco-concrete self need possess a degree of anti-worry ability, anti-worry ability can be estimated by following formula:
In this formula: D aggregate mean diameter, unit mm;
Eco-concrete composite construction protection soil body characteristic diameter, unit mm;
5., the scope that the anti-numerical value considering ability exceeds desirable 9 20 is calculated, illustrate that the anti-worry ability of this test sand-free coarse porous concrete eco-concrete is poor, when being applied to bank-protection works water level with lower part, under running into fluctuation in stage situation of change, rely on self can not play and well consider soil drainage effect, it is necessary to loaded filter is set.
CN201610126839.9A 2016-03-07 2016-03-07 Detection method for anti-filtration capability of vegetation concrete Pending CN105738258A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106644855A (en) * 2016-12-07 2017-05-10 山东大学 Measuring method for particle diameter of blocking particles in pervious concrete, and pervious concrete grading detection method
CN111663501A (en) * 2020-05-29 2020-09-15 广东省水利水电科学研究院 Sluice downstream energy dissipation structure with anti-clogging and anti-filtering functions and construction method thereof
CN112930741A (en) * 2021-01-27 2021-06-11 广东省科学院生态环境与土壤研究所 Method for improving non-expansive compact soil body through mechanical granulation

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CN103480579A (en) * 2013-10-10 2014-01-01 鞍钢集团矿业公司 Screening and weighing device and screening and weighing method for granular rock particle size distribution

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Publication number Priority date Publication date Assignee Title
US6581780B1 (en) * 2001-01-16 2003-06-24 Ai Enterprises, Inc. Automatic gradation unit
GB2470075A (en) * 2009-05-08 2010-11-10 Endecotts Ltd Sieve shaker separator and weighing apparatus
CN102445408A (en) * 2011-09-29 2012-05-09 中铁第五勘察设计院集团有限公司 Automatic detector for size grading of filler
CN202410978U (en) * 2011-12-08 2012-09-05 浙江天蓝环保技术股份有限公司 Sieving device for sieving materials by using drying method and measuring average grain diameters
CN103480579A (en) * 2013-10-10 2014-01-01 鞍钢集团矿业公司 Screening and weighing device and screening and weighing method for granular rock particle size distribution

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106644855A (en) * 2016-12-07 2017-05-10 山东大学 Measuring method for particle diameter of blocking particles in pervious concrete, and pervious concrete grading detection method
CN111663501A (en) * 2020-05-29 2020-09-15 广东省水利水电科学研究院 Sluice downstream energy dissipation structure with anti-clogging and anti-filtering functions and construction method thereof
CN112930741A (en) * 2021-01-27 2021-06-11 广东省科学院生态环境与土壤研究所 Method for improving non-expansive compact soil body through mechanical granulation

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