CN105603930A - Ecological concrete slope protection antiskid and rain wash preventive stability testing method - Google Patents
Ecological concrete slope protection antiskid and rain wash preventive stability testing method Download PDFInfo
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- CN105603930A CN105603930A CN201610133224.9A CN201610133224A CN105603930A CN 105603930 A CN105603930 A CN 105603930A CN 201610133224 A CN201610133224 A CN 201610133224A CN 105603930 A CN105603930 A CN 105603930A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
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Abstract
The invention discloses an ecological concrete slope protection antiskid and rain wash preventive stability testing method. The method includes following steps: (1), conducting an antiskid stability test; (2), analyzing a result of the antiskid stability test; (3), performing a rain wash preventive stability test; (4), analyzing a result of the rain wash preventive stability test. Research results of the method show that on the basis of stable structure of a novel sand-free porous ecological concrete revetment, the method has higher capability of preventing washing and eroding of rainfall splashing, surface runoff and river water waves; plants can be grown on a bank slope protecting body, so that ecological balance of a water-land area can be maintained.
Description
Technical field
The invention belongs to concrete revetment technical field, be specifically related to the antiskid of a kind of eco-concrete bank protection and the punching of anti-rainwaterBrush stability testing method.
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,Current often cause river levee to cave in to the scour of bank slope, and heavy showers usually causes again bank slope soil erosion to the erosion of bank slope. RightThis, people have to again to the river levee shore protection measure of taking to harden, protection dyke safety. Traditional concrete revetment engineering,Main consideration river course antiscour and bank stability, less consideration eco environment facto. The construction adopting, the one, cast-in-place coagulationSoil panel, the 2nd, pave concrete prefabricated board. The consequence of two kinds of construction methods is to have formed large area on the soil matrix of two sides, river courseConcrete slab gallery. These hard gallery structures, have hindered the performance of the biological habitat of Riparian Zone function, have destroyed riverOriginal ecosystem.
Sand-free coarse porous concrete eco-concrete shore protection is taking soil bank slope as basis, add concrete, vegetation composition oneComposite construction protection works, edaphic stable most important to the safe operation of whole engineering, though be the shallow-layer soil body orThe sliding failure of the deep layer soil body, all can cause the unstability of shore protection. The effect of shore protection protection works is exactly to improve protection soilBody stability, so need to analyze the stable of the soil body before project engineering scheme, research affects the factor of its stability, and carries outStability test.
The resistance to overturning of bank slope is mainly subject to the impact of three aspect key elements, has bank slope immanent structure form, bank slope soilThe ability that layer opposing washed away, close riverbank place flow condition. Traditional bank-protection works is to prevent rainfall runoff, river wave opposite bankThe slope soil body washes away as main mission, and along with the fast development of modern society, this more single function cannot meet needAsk, at present, the investigative technique not yet having had meets to eco-concrete bank protection the technology that structural stability is studied.
Summary of the invention
The present invention is in order to solve weak point of the prior art, provides that a kind of anti-heavy showers scouring capability is strong, safety canStrong by property, to improve the construction quality antiskid of eco-concrete bank protection and anti-rain drop erosion stability testing method.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: the antiskid of eco-concrete bank protection and anti-rainwaterScouring stability test method, comprises the following steps:
(1), carry out stability against sliding test;
(2), antiskid stability test result is analyzed;
(3), carry out anti-rain drop erosion stability test;
(4), antagonism rain drop erosion stability test result is analyzed.
Described step (1) comprises following content:
On the square plank of 120cm × 120cm, cover the soil that the thick bank slope of 2cm place gathers, be modeled to artificial adjustable slopeShore protection; According to dissimilar combining form, carry out successively six groups of contrast tests below;
1., above plank, be only coated with the soil layer that 2cm is thick, soil layer is tamped, slope is than when the 1:4, soil layer is stable, does not occur slidingMoving; When slope ratio is increased to 1:3, soil layer can continue to remain stable; Again adjust the gradient until soil layer cannot maintain homeostasisWhile starting to glide, only, measure vertical height H and horizontal length L value and calculate slope than being 1:1.6;
2., cover 2cm thick soil layer at plank upper surface, soil layer is tamped, the form by " diagonal angle, angle " on soil layer is put 4 sixThe Xing Ge ridge, limit concrete block, when slope ratio is 1:4, sliding, do not appear in Stability Analysis of Structures; When slope ratio is increased to 1:3, structure still canEnough maintain stable; Again adjust the gradient until structure cannot maintain homeostasis while starting to glide only, measure vertical height H and waterFlat length L value calculates slope than being 1:1.9;
3., cover 2cm thick soil layer at plank upper surface, soil layer is tamped, on soil layer, put 4 by the form at " diagonal angle, angle " and beHexagonal sand-free coarse porous concrete eco-concrete plate, when slope ratio is 1:4, sliding, do not appear in Stability Analysis of Structures; Slope ratio is increased to 1:3Time, it is stable that structure still can maintain; Again increase the gradient until structure cannot maintain homeostasis while starting to glide only, measureVertical height H and horizontal length L value calculate slope than being 1:1.6;
4., cover 2cm thick soil layer at plank upper surface, soil layer is tamped, the form by " diagonal angle, angle " on soil layer is put 4 sixThe Xing Ge ridge, limit concrete block, in concrete block inside, each lattice ridge, correspondence is placed a hexagon sand-free coarse porous concrete eco-concrete againPlate; In the time that slope ratio is decided to be 1:4, composite construction is stable, does not occur sliding phenomenon; When slope ratio is increased to 1:3, composite construction stillSo can maintain stable; Again increase the gradient until composite construction cannot maintain homeostasis while starting to glide only, measure verticalHeight H and horizontal length L value calculate slope than being 1:1.5;
5., cover 2cm thick soil layer at plank upper surface, soil layer is tamped, the form by " diagonal angle, angle " on soil layer is put 4 sixThe Xing Ge ridge, limit concrete block, in concrete block inside, each lattice ridge, correspondence is placed a hexagon sand-free coarse porous concrete eco-concrete againPlate, then will above every block of sand-free coarse porous concrete eco-concrete plate, spread the Nutrition Soil that 3cm is thick, make Nutrition Soil surface and the hexagonal ridge mixedSolidifying soil block flushes; In the time that slope ratio is decided to be 1:4, composite construction is stable, does not occur sliding phenomenon; When slope ratio is increased to 1:3, multipleClose structure and still can remain stable; Again increase the gradient until composite construction cannot maintain homeostasis while starting to glide only,Measure vertical height H and horizontal length L value and calculate slope than being 1:1.5;
6., cover 2cm thick soil layer at plank upper surface, soil layer is tamped, the form by " diagonal angle, angle " on soil layer is put 4 sixThe Xing Ge ridge, limit concrete block, in concrete block inside, each lattice ridge, correspondence is placed a hexagon sand-free coarse porous concrete eco-concrete againPlate, then will above every block of sand-free coarse porous concrete eco-concrete plate, spread the turf that 3cm is thick; In the time that slope ratio is decided to be 1:4, composite construction is steadyFixed, there is not sliding phenomenon; When slope ratio is increased to 1:3, it is stable that composite construction still can maintain; Again increase the gradient straightCannot maintain homeostasis and start to glide to composite construction time, only, measure vertical height H and horizontal length L value and calculate slope ratio and be1:1.5。
Described step (2) is analyzed respectively for above-mentioned six groups of result of the tests, makes a concrete analysis of as follows:
The described 2. group: hexagonal ridge concrete block is from great, smaller with soil contact, and antiskid frictional force is also correspondingLittle, in the time only having hexagonal ridge concrete block revetment, easily occur gliding;
The described the 3. group: sand-free coarse porous concrete eco-concrete plate internal voids is more, it is little to conduct oneself with dignity, and long-pending with soil contactGreatly, antiskid frictional force is also corresponding larger, more anti-than hexagonal ridge concrete block while only using sand-free coarse porous concrete eco-concrete plateSliding good stability;
The described the 4. group: using hexagonal ridge concrete block and without the ecological coarse porous concrete plate of sand composite construction as slight slopeWhen bank protection material, overall cling property uses single type material a shade better;
The described 5. with the 6. group: hexagonal ridge concrete block and spreading above sand-free coarse porous concrete eco-concrete plate composite constructionAnchor a tent while supporting soil layer or Nutrition Soil turf, stability against sliding does not further improve, substantially unchanged;
The described the 6. group: it is ecological mixed that the Nutrition Soil turf of transplanting during due to test is that root system cutting is routed to sand-free coarse porous concrete after neatConcrete board piece, cannot show seeing through eco-concrete after root growth a period of time pricks into whether whole to bank protection in bank slope soilBody stability against sliding exerts an influence, and need to carry out in outdoor test place assembled eco-concrete bank protection construction, simulation the Yellow RiverBank slope truth, by certain plant growth cycle, after in grass roots gos deep into soil, observes bank slope holistic arrestment slippage stabilizationProperty.
Described step (3) comprises following content: bank protection surface will be subject to rainfall and splashes with rainfall runoff and rush under normal circumstancesThe impact of brush, according to existing slope wash Analysis on Mechanism, slope vegetation is after growing into a certain degree, and rainfall splashes domaticWash away impact just negligible, washing away is now mainly to be produced by rainfall runoff;
Setting simulated rainfall intensity is 110mm/h, first makes the square plank of a block length 70cm, wide 60cm, on long side edgeAdd two thin backplates of high 8cm, wood plate surface is spread plastic foil, to prevent that soil from flowing out and moulding from two avris and bottom under current scourOn material film, spread a layer of clay, above plastic foil, cover the soil horizon of the thick bank slope of 2cm, in conjunction with composite construction stability against sliding test aboveThe data that draw, 1:4,1:3, tri-slope ratios of 1:1.5 are established in test, calculate analog stream by simulation raininess, the gradient, plank areaAmount, washes away soil according to how many quantitative artificial runoffs that down form from plank top different raininess of the water yield per hour; ForThe impact of the artificial rainfall runoff of effective research on soil erosion degree, draft on plank and to place soil, soil+hexagonal ridge is mixedSolidifying soil block, soil+eco-concrete plate, four kinds of combining forms of soil+hexagonal ridge concrete block+eco-concrete plate,When current scour soil, collect the material flowing down in bottom, go out correspondence by soil losses Mass Calculation under various combination configuration stateSoil erosion modulus, the anti-rain drop erosion stability of quantitative analysis assembled eco-concrete bank protection.
Described step (4) is analyzed respectively for anti-rain drop erosion stability test result, and concrete analysis comprises followingStep:
A, be plotted in slope than one timing, soil erosion modulus is at the change curve of different operating modes, operating mode is described four kinds of combinationsForm;
B, be plotted under same operating, along with the variation of slope ratio, the variation rule curve figure of soil erosion coefficient;
C, the curve map of drawing according to step a and b, hexagonal ridge concrete block starts at rainwater the initial stage of washing away, water and soil conservationProperty better, in the time that current gather to a certain extent, the soil body of frame bottom there will be to subside and forms the passage of soil erosion, causesIn water and soil short-term, sharply run off;
D, eco-concrete plate and soil horizon contact area are large, and inside concrete space is many, there will not be current to assemblePhenomenon, in the time that rainfall runoff washes away, can not protect position nearby and occur soil erosion passage, than hexagonal ridge concrete blockSuppress the effective of soil erosion;
E, soil+hexagonal ridge concrete block+eco-concrete plate composite construction are in the time suffering current scour, and bottom also collectsPoly-part water, but there is not obvious soil erosion in protection position, and soil and water conservation effect is best.
Adopt technique scheme, result of study of the present invention is steady in structure at novel sand-free coarse porous concrete eco-concrete shore protectionOn fixed basis, have better prevent that rainfall from splashing, the ability of rainwash, river wave cut and erosion, and canGrowing plant on bank slope protection body, maintains land and water local area ecological balance. The application prospect that eco-concrete shore protection technology is wideAttract many scientific research personnel to put in the exploration of relevant issues and gone, in view of current application and research is all in cast-in-place coagulationIn the soil stage, the present invention proposes all to adopt according to engineering construction each test specimen used prefabricated, then the method construction of arriving on-site consolidation, andBy correlation theories knowledge analysis, indoor test performance, outdoor simulating scene, in conjunction with outdoor Contraction in Site process draw asDraw a conclusion: composite construction is good compared with single structure stability against sliding, simultaneously ability to resist splash erosion the best. Prefabricated component when engineering is carried outAssembled low to job site conditional request, easy and simple to handle, quick, save the duration, reduce disbursement. The plantation of selection bank slopeWhen plant, will consider native country adaptability, vegetation daily management should be taking self-sow as main, and it is auxiliary manually managing and protecting, and avoids too much peopleWork is intervened.
In sum, principle of the invention science, easy operating, test data are accurate, can for test data analysisExtend to construction operation innovation, all adopt the prefabricated method fabrication of concrete lattice ridge, plant-growing type eco-concrete plate,Nutrition Soil and turf, then arrive on-site consolidation. Like this, can reduce site operation link, the compression field operation time, adapt to eachPlant construction condition, can make again construction quality and engineering effort improve, be convenient to promote concrete ecological shore protection technology.
Brief description of the drawings
Fig. 1 is that slope ratio is 1/4 o'clock, and soil erosion coefficient is along with the change curve of operating mode;
Fig. 2 is that slope ratio is 1/3 o'clock, and soil erosion coefficient is along with the change curve of operating mode;
Fig. 3 is operating mode while being naked soil horizon, and soil erosion coefficient is along with the change curve of slope ratio;
Fig. 4 is operating mode while being naked soil horizon+lattice stalk concrete block, and soil erosion coefficient is along with the change curve of slope ratio;
Fig. 5 is operating mode while being naked soil horizon+eco-concrete plate, and soil erosion coefficient is along with the change curve of slope ratio;
Fig. 6 is operating mode while being naked soil horizon+eco-concrete plate+lattice stalk, and soil erosion coefficient is along with the change curve of slope ratio.
Detailed description of the invention
Eco-concrete bank protection of the present invention antiskid and anti-rain drop erosion stability testing method, comprise the following steps:
(1), carry out stability against sliding test;
(2), antiskid stability test result is analyzed;
(3), carry out anti-rain drop erosion stability test;
(4), antagonism rain drop erosion stability test result is analyzed.
Described step (1) comprises following content:
On the square plank of 120cm × 120cm, cover the soil that the thick bank slope of 2cm place gathers, be modeled to artificial adjustable slopeShore protection; According to dissimilar combining form, carry out successively six groups of contrast tests below;
1., above plank, be only coated with the soil layer that 2cm is thick, soil layer is tamped, slope is than when the 1:4, soil layer is stable, does not occur slidingMoving; When slope ratio is increased to 1:3, soil layer can continue to remain stable; Again adjust the gradient until soil layer cannot maintain homeostasisWhile starting to glide, only, measure vertical height H and horizontal length L value and calculate slope than being 1:1.6;
2., cover 2cm thick soil layer at plank upper surface, soil layer is tamped, the form by " diagonal angle, angle " on soil layer is put 4 sixThe Xing Ge ridge, limit concrete block, when slope ratio is 1:4, sliding, do not appear in Stability Analysis of Structures; When slope ratio is increased to 1:3, structure still canEnough maintain stable; Again adjust the gradient until structure cannot maintain homeostasis while starting to glide only, measure vertical height H and waterFlat length L value calculates slope than being 1:1.9;
3., cover 2cm thick soil layer at plank upper surface, soil layer is tamped, on soil layer, put 4 by the form at " diagonal angle, angle " and beHexagonal sand-free coarse porous concrete eco-concrete plate, when slope ratio is 1:4, sliding, do not appear in Stability Analysis of Structures; Slope ratio is increased to 1:3Time, it is stable that structure still can maintain; Again increase the gradient until structure cannot maintain homeostasis while starting to glide only, measureVertical height H and horizontal length L value calculate slope than being 1:1.6;
4., cover 2cm thick soil layer at plank upper surface, soil layer is tamped, the form by " diagonal angle, angle " on soil layer is put 4 sixThe Xing Ge ridge, limit concrete block, in concrete block inside, each lattice ridge, correspondence is placed a hexagon sand-free coarse porous concrete eco-concrete againPlate; In the time that slope ratio is decided to be 1:4, composite construction is stable, does not occur sliding phenomenon; When slope ratio is increased to 1:3, composite construction stillSo can maintain stable; Again increase the gradient until composite construction cannot maintain homeostasis while starting to glide only, measure verticalHeight H and horizontal length L value calculate slope than being 1:1.5;
5., cover 2cm thick soil layer at plank upper surface, soil layer is tamped, the form by " diagonal angle, angle " on soil layer is put 4 sixThe Xing Ge ridge, limit concrete block, in concrete block inside, each lattice ridge, correspondence is placed a hexagon sand-free coarse porous concrete eco-concrete againPlate, then will above every block of sand-free coarse porous concrete eco-concrete plate, spread the Nutrition Soil that 3cm is thick, make Nutrition Soil surface and the hexagonal ridge mixedSolidifying soil block flushes; In the time that slope ratio is decided to be 1:4, composite construction is stable, does not occur sliding phenomenon; When slope ratio is increased to 1:3, multipleClose structure and still can remain stable; Again increase the gradient until composite construction cannot maintain homeostasis while starting to glide only,Measure vertical height H and horizontal length L value and calculate slope than being 1:1.5;
6., cover 2cm thick soil layer at plank upper surface, soil layer is tamped, the form by " diagonal angle, angle " on soil layer is put 4 sixThe Xing Ge ridge, limit concrete block, in concrete block inside, each lattice ridge, correspondence is placed a hexagon sand-free coarse porous concrete eco-concrete againPlate, then will above every block of sand-free coarse porous concrete eco-concrete plate, spread the turf that 3cm is thick; In the time that slope ratio is decided to be 1:4, composite construction is steadyFixed, there is not sliding phenomenon; When slope ratio is increased to 1:3, it is stable that composite construction still can maintain; Again increase the gradient straightCannot maintain homeostasis and start to glide to composite construction time, only, measure vertical height H and horizontal length L value and calculate slope ratio and be1:1.5。
It is as follows that above-mentioned six groups of result of the tests are organized into table 1:
Table 1 stability against sliding result of the test summary sheet
Analyze respectively for above-mentioned six groups of result of the tests (table 1), make a concrete analysis of as follows:
The described 2. group: hexagonal ridge concrete block is from great, smaller with soil contact, and antiskid frictional force is also correspondingLittle, in the time only having hexagonal ridge concrete block revetment, easily occur gliding;
The described the 3. group: sand-free coarse porous concrete eco-concrete plate internal voids is more, it is little to conduct oneself with dignity, and long-pending with soil contactGreatly, antiskid frictional force is also corresponding larger, more anti-than hexagonal ridge concrete block while only using sand-free coarse porous concrete eco-concrete plateSliding good stability;
The described the 4. group: using hexagonal ridge concrete block and without the ecological coarse porous concrete plate of sand composite construction as slight slopeWhen bank protection material, overall cling property uses single type material a shade better;
The described 5. with the 6. group: hexagonal ridge concrete block and spreading above sand-free coarse porous concrete eco-concrete plate composite constructionAnchor a tent while supporting soil layer or Nutrition Soil turf, stability against sliding does not further improve, substantially unchanged;
The described the 6. group: it is ecological mixed that the Nutrition Soil turf of transplanting during due to test is that root system cutting is routed to sand-free coarse porous concrete after neatConcrete board piece, cannot show seeing through eco-concrete after root growth a period of time pricks into whether whole to bank protection in bank slope soilBody stability against sliding exerts an influence, and need to carry out in outdoor test place assembled eco-concrete bank protection construction, simulation the Yellow RiverBank slope truth, by certain plant growth cycle, after in grass roots gos deep into soil, observes bank slope holistic arrestment slippage stabilizationProperty.
Described step (4) comprises following content: bank protection surface will be subject to rainfall and splashes with rainfall runoff and rush under normal circumstancesThe impact of brush, according to existing slope wash Analysis on Mechanism, slope vegetation is after growing into a certain degree, and rainfall splashes domaticWash away impact just negligible, washing away is now mainly to be produced by rainfall runoff;
Setting simulated rainfall intensity is 110mm/h, first makes the square plank of a block length 70cm, wide 60cm, on long side edgeAdd two thin backplates of high 8cm, wood plate surface is spread plastic foil, to prevent that soil from flowing out and moulding from two avris and bottom under current scourOn material film, spread a layer of clay, above plastic foil, cover the soil horizon of the thick bank slope of 2cm, in conjunction with composite construction stability against sliding test aboveThe data that draw, 1:4,1:3, tri-slope ratios of 1:1.5 are established in test, calculate analog stream by simulation raininess, the gradient, plank areaAmount, washes away soil according to how many quantitative artificial runoffs that down form from plank top different raininess of the water yield per hour; ForThe impact of the artificial rainfall runoff of effective research on soil erosion degree, draft on plank and to place soil, soil+hexagonal ridge is mixedSolidifying soil block, soil+eco-concrete plate, four kinds of combining forms of soil+hexagonal ridge concrete block+eco-concrete plate,When current scour soil, collect the material flowing down in bottom, go out correspondence by soil losses Mass Calculation under various combination configuration stateSoil erosion modulus, the anti-rain drop erosion stability of quantitative analysis assembled eco-concrete bank protection. Test data is in table 2.
The anti-rain drop erosion stability test of table 2 result summary sheet
Soil erosion modulus refers to soil earth and matrix soil body generation erosion amount thereof in the unit are within the unit intervalSize, it is an index value of statement soil erosion intensity, is used for being presented at the erosion in certain region in the unit intervalIntensity size. Because four kinds of combinations more than in stability against sliding test only have soil+hexagonal ridge concrete+ecological coagulationThe critical slope of the slip ratio of this composite construction form of soil plate has reached 1:1.5, therefore than under only test soil+hexagon on 1:1.5 slopeThe anti-rain drop erosion stability of shape lattice ridge concrete+eco-concrete plate composite construction.
Analyze respectively for anti-rain drop erosion stability test result, concrete analysis comprises the following steps:
A, be plotted in slope than one timing, soil erosion modulus is at the change curve of different operating modes, operating mode is described four kinds of combinationsForm; As depicted in figs. 1 and 2; Four kinds of operating modes in Fig. 1 and Fig. 2 are respectively: the naked soil horizon of operating mode 1----; Operating mode 2-----soilEarth layer covers upper hexagonal ridge concrete block; Operating mode 3-----soil horizon covers upper eco-concrete plate; Operating mode 4------Soil horizon covers upper hexagonal ridge concrete block and eco-concrete plate; Can be found out by Fig. 1 and Fig. 2, naked soil horizon existsIt is larger that artificial runoff washes away lower soil erosion modulus, and soil horizon covers upper hexagonal ridge concrete block or eco-concrete plateAfter piece, soil erosion modulus reduces to some extent, and when the upper hexagonal ridge concrete block of soil horizon covering and eco-concrete plate shapeBecome when composite construction soil erosion modulus to have significantly and reduce, illustrate hexagonal ridge concrete block and eco-concrete plateJointly be applied to bank protection, can obviously improve the ability of its anti-rain drop erosion.
B, be plotted under same operating, along with the variation of slope ratio, the variation rule curve figure of soil erosion coefficient; As figureShown in 3--Fig. 6, along with slope than by 1:4 to 1:3, the gradient is increasing, same combining form soil erosion modulus is also becoming greatly,Especially composite construction is under the ratio of the critical slope of 1:1.5, and current scour has aggravated structural instability downslide, and soil erosion modulus is remarkableIncrease, under this kind of condition, bank protection cannot effectively keep self stability.
C, the curve map of drawing according to step a and b, hexagonal ridge concrete block starts at rainwater the initial stage of washing away, water and soilRetentivity is better, and in the time that current gather to a certain extent, the soil body of frame bottom there will be the passage of the formation soil erosion of subsiding,Cause in water and soil short-term and sharply run off;
D, eco-concrete plate and soil horizon contact area are large, and inside concrete space is many, there will not be current to assemblePhenomenon, in the time that rainfall runoff washes away, can not protect position nearby and occur soil erosion passage, than hexagonal ridge concrete blockSuppress the effective of soil erosion;
E, soil+hexagonal ridge concrete block+eco-concrete plate composite construction are in the time suffering current scour, and bottom also collectsPoly-part water, but there is not obvious soil erosion in protection position, and soil and water conservation effect is best.
Above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although with reference to above-described embodiment to thisBright having been described in detail, those of ordinary skill in the art is to be understood that: still can to the present invention modify or etc.With replacing, and do not depart from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in power of the present inventionIn the middle of profit claimed range.
Claims (5)
1. the antiskid of eco-concrete bank protection and anti-rain drop erosion stability testing method, is characterized in that: comprise the following steps:
(1), carry out stability against sliding test;
(2), antiskid stability test result is analyzed;
(3), carry out anti-rain drop erosion stability test;
(4), antagonism rain drop erosion stability test result is analyzed.
2. eco-concrete bank protection according to claim 1 antiskid and anti-rain drop erosion stability testing method, its featureBe: described step (1) comprises following content:
On the square plank of 120cm × 120cm, cover the soil that the thick bank slope of 2cm place gathers, be modeled to artificial adjustable slopeShore protection; According to dissimilar combining form, carry out successively six groups of contrast tests below;
1., above plank, be only coated with the soil layer that 2cm is thick, soil layer is tamped, slope is than when the 1:4, soil layer is stable, does not occur slidingMoving; When slope ratio is increased to 1:3, soil layer can continue to remain stable; Again adjust the gradient until soil layer cannot maintain homeostasisWhile starting to glide, only, measure vertical height H and horizontal length L value and calculate slope than being 1:1.6;
2., cover 2cm thick soil layer at plank upper surface, soil layer is tamped, the form by " diagonal angle, angle " on soil layer is put 4 sixThe Xing Ge ridge, limit concrete block, when slope ratio is 1:4, sliding, do not appear in Stability Analysis of Structures; When slope ratio is increased to 1:3, structure still canEnough maintain stable; Again adjust the gradient until structure cannot maintain homeostasis while starting to glide only, measure vertical height H and waterFlat length L value calculates slope than being 1:1.9;
3., cover 2cm thick soil layer at plank upper surface, soil layer is tamped, on soil layer, put 4 by the form at " diagonal angle, angle " and beHexagonal sand-free coarse porous concrete eco-concrete plate, when slope ratio is 1:4, sliding, do not appear in Stability Analysis of Structures; Slope ratio is increased to 1:3Time, it is stable that structure still can maintain; Again increase the gradient until structure cannot maintain homeostasis while starting to glide only, measureVertical height H and horizontal length L value calculate slope than being 1:1.6;
4., cover 2cm thick soil layer at plank upper surface, soil layer is tamped, the form by " diagonal angle, angle " on soil layer is put 4 sixThe Xing Ge ridge, limit concrete block, in concrete block inside, each lattice ridge, correspondence is placed a hexagon sand-free coarse porous concrete eco-concrete againPlate; In the time that slope ratio is decided to be 1:4, composite construction is stable, does not occur sliding phenomenon; When slope ratio is increased to 1:3, composite construction stillSo can maintain stable; Again increase the gradient until composite construction cannot maintain homeostasis while starting to glide only, measure verticalHeight H and horizontal length L value calculate slope than being 1:1.5;
5., cover 2cm thick soil layer at plank upper surface, soil layer is tamped, the form by " diagonal angle, angle " on soil layer is put 4 sixThe Xing Ge ridge, limit concrete block, in concrete block inside, each lattice ridge, correspondence is placed a hexagon sand-free coarse porous concrete eco-concrete againPlate, then will above every block of sand-free coarse porous concrete eco-concrete plate, spread the Nutrition Soil that 3cm is thick, make Nutrition Soil surface and the hexagonal ridge mixedSolidifying soil block flushes; In the time that slope ratio is decided to be 1:4, composite construction is stable, does not occur sliding phenomenon; When slope ratio is increased to 1:3, multipleClose structure and still can remain stable; Again increase the gradient until composite construction cannot maintain homeostasis while starting to glide only,Measure vertical height H and horizontal length L value and calculate slope than being 1:1.5;
6., cover 2cm thick soil layer at plank upper surface, soil layer is tamped, the form by " diagonal angle, angle " on soil layer is put 4 sixThe Xing Ge ridge, limit concrete block, in concrete block inside, each lattice ridge, correspondence is placed a hexagon sand-free coarse porous concrete eco-concrete againPlate, then will above every block of sand-free coarse porous concrete eco-concrete plate, spread the turf that 3cm is thick; In the time that slope ratio is decided to be 1:4, composite construction is steadyFixed, there is not sliding phenomenon; When slope ratio is increased to 1:3, it is stable that composite construction still can maintain; Again increase the gradient straightCannot maintain homeostasis and start to glide to composite construction time, only, measure vertical height H and horizontal length L value and calculate slope ratio and be1:1.5。
3. eco-concrete bank protection according to claim 2 antiskid and anti-rain drop erosion stability testing method, its featureBe: described step (2) is analyzed respectively for above-mentioned six groups of result of the tests, makes a concrete analysis of as follows:
The described 2. group: hexagonal ridge concrete block is from great, smaller with soil contact, and antiskid frictional force is also correspondingLittle, in the time only having hexagonal ridge concrete block revetment, easily occur gliding;
The described the 3. group: sand-free coarse porous concrete eco-concrete plate internal voids is more, it is little to conduct oneself with dignity, and long-pending with soil contactGreatly, antiskid frictional force is also corresponding larger, more anti-than hexagonal ridge concrete block while only using sand-free coarse porous concrete eco-concrete plateSliding good stability;
The described the 4. group: using hexagonal ridge concrete block and without the ecological coarse porous concrete plate of sand composite construction as slight slopeWhen bank protection material, overall cling property uses single type material a shade better;
The described 5. with the 6. group: hexagonal ridge concrete block and spreading above sand-free coarse porous concrete eco-concrete plate composite constructionAnchor a tent while supporting soil layer or Nutrition Soil turf, stability against sliding does not further improve, substantially unchanged;
The described the 6. group: it is ecological mixed that the Nutrition Soil turf of transplanting during due to test is that root system cutting is routed to sand-free coarse porous concrete after neatConcrete board piece, cannot show seeing through eco-concrete after root growth a period of time pricks into whether whole to bank protection in bank slope soilBody stability against sliding exerts an influence, and need to carry out in outdoor test place assembled eco-concrete bank protection construction, simulation the Yellow RiverBank slope truth, by certain plant growth cycle, after in grass roots gos deep into soil, observes bank slope holistic arrestment slippage stabilizationProperty.
4. according to the eco-concrete bank protection antiskid described in claim 2 or 3 and anti-rain drop erosion stability testing method, its spyLevy and be: described step (3) comprises following content: bank protection surface will be subject to rainfall and splashes with rainfall runoff and wash away under normal circumstancesImpact, according to existing slope wash Analysis on Mechanism, slope vegetation is after growing into a certain degree, rainfall splashes domaticWash away impact just negligible, washing away is now mainly to be produced by rainfall runoff;
Setting simulated rainfall intensity is 110mm/h, first makes the square plank of a block length 70cm, wide 60cm, on long side edgeAdd two thin backplates of high 8cm, wood plate surface is spread plastic foil, to prevent that soil from flowing out and moulding from two avris and bottom under current scourOn material film, spread a layer of clay, above plastic foil, cover the soil horizon of the thick bank slope of 2cm, in conjunction with composite construction stability against sliding test aboveThe data that draw, 1:4,1:3, tri-slope ratios of 1:1.5 are established in test, calculate analog stream by simulation raininess, the gradient, plank areaAmount, washes away soil according to how many quantitative artificial runoffs that down form from plank top different raininess of the water yield per hour; ForThe impact of the artificial rainfall runoff of effective research on soil erosion degree, draft on plank and to place soil, soil+hexagonal ridge is mixedSolidifying soil block, soil+eco-concrete plate, four kinds of combining forms of soil+hexagonal ridge concrete block+eco-concrete plate,When current scour soil, collect the material flowing down in bottom, go out correspondence by soil losses Mass Calculation under various combination configuration stateSoil erosion modulus, the anti-rain drop erosion stability of quantitative analysis assembled eco-concrete bank protection.
5. eco-concrete bank protection according to claim 4 antiskid and anti-rain drop erosion stability testing method, its featureBe: described step (4) is analyzed respectively for anti-rain drop erosion stability test result, concrete analysis comprises following stepRapid:
A, be plotted in slope than one timing, soil erosion modulus is at the change curve of different operating modes, operating mode is described four kinds of combinationsForm;
B, be plotted under same operating, along with the variation of slope ratio, the variation rule curve figure of soil erosion coefficient;
C, the curve map of drawing according to step a and b, hexagonal ridge concrete block starts at rainwater the initial stage of washing away, water and soil conservationProperty better, in the time that current gather to a certain extent, the soil body of frame bottom there will be to subside and forms the passage of soil erosion, causesIn water and soil short-term, sharply run off;
D, eco-concrete plate and soil horizon contact area are large, and inside concrete space is many, there will not be current to assemblePhenomenon, in the time that rainfall runoff washes away, can not protect position nearby and occur soil erosion passage, than hexagonal ridge concrete blockSuppress the effective of soil erosion;
E, soil+hexagonal ridge concrete block+eco-concrete plate composite construction are in the time suffering current scour, and bottom also collectsPoly-part water, but there is not obvious soil erosion in protection position, and soil and water conservation effect is best.
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