CN117090283A - A linear drainage ditch for rural use and its penetration testing method - Google Patents
A linear drainage ditch for rural use and its penetration testing method Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/14—Polyepoxides
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
- E03F3/046—Open sewage channels
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/06—Gully gratings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
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Abstract
The invention discloses a linear drainage ditch for rural areas and a penetration test method thereof, which relate to the technical field of sewage collection, solve the problems of high use cost and easy damage of the existing drainage ditch made of rural concrete, reduce materials and reduce construction difficulty, and concretely adopt the following scheme: the novel energy-saving building waste comprises a drainage ditch main body, wherein a grid is arranged on a groove of the drainage ditch main body, the drainage ditch main body is made of a mixed material, a material main agent of the mixed material is epoxy resin, a curing agent is modified amine T31 synthesized by phenol, formaldehyde and fatty amine, a diluting agent is acetone, a toughening agent is dibutyl phthalate, a filler is fly ash, and an aggregate is fine aggregate produced by utilizing building waste.
Description
Technical Field
The invention relates to the technical field of sewage collection, in particular to a linear drainage ditch for rural areas and a penetration test method thereof.
Background
Rural sewage collection is difficult due to the lack of scientific planning, unreasonable layout, imperfect drainage network or no drainage facilities, complex terrain, low population density, low longitudinal space utilization rate, narrow road, imperfect infrastructure and other factors in rural areas.
The inventor finds that the compressive strength of the conventional C25 concrete drainage ditch is about 30Mpa, the situations of livestock trampling, tractor rolling, terrain change and the like cannot be well met, the rural sewage pipe network is low in utilization rate due to unstable rural water quality and large water quantity day and night change, sewage discharge is in an intermittent state, the conventional C25 concrete drainage ditch is poor in running water property, the concrete drainage ditch needs to be ensured to have enough cross-sectional area for adapting to the sewage discharge in the intermittent state, the use cost is high, and the construction difficulty is high.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a linear drainage ditch for rural areas and a penetration test method thereof, and the drainage ditch is manufactured by using an epoxy resin concrete mixed material, so that the problems of high use cost and easy damage of the existing drainage ditch manufactured by rural concrete are solved.
In order to achieve the above object, the present invention is realized by the following technical scheme:
in a first aspect, the invention provides a linear drainage ditch for rural areas, which comprises a drainage ditch main body, wherein a grid is arranged on a groove of the drainage ditch main body, the drainage ditch main body is made of a mixed material, a material main agent of the mixed material is epoxy resin, a curing agent is modified amine T31 synthesized by phenol, formaldehyde and fatty amine, a diluting agent is acetone, a toughening agent is dibutyl phthalate, a filler is fly ash, and an aggregate is fine aggregate produced by using construction waste.
As a further implementation, the epoxy resin is an E-44 type epoxy resin.
As a further implementation, the ratio of aggregate, fly ash and epoxy resin is 8:1:1.
As a further implementation, the grille is made of stainless steel material.
As a further implementation mode, the particle components of the fly ash are glass beads, spongy glass bodies and carbon particles.
As a further implementation manner, the cross section of the groove is U-shaped.
In a second aspect, the invention provides a penetration test method for a linear drainage ditch for rural areas, which comprises the following steps:
preparing a drainage ditch sample by using an epoxy resin concrete mixed material, measuring the height and the bottom area of the drainage ditch sample, and spraying glass cement on the periphery of the drainage ditch sample;
placing a drainage ditch sample in a permeation measuring device, and plugging a gap between the drainage ditch sample and the permeation measuring device by using glass cement;
injecting water into the infiltration measuring device, penetrating the water body through the drainage ditch sample and discharging, starting a stopwatch for timing after the water injection amount and the drainage amount reach balance, simultaneously measuring the discharged water amount, and measuring the water temperature at the moment;
repeating the operation by replacing different drainage ditch samples, and recording data;
the data are collated and the permeability coefficient is calculated.
As a further implementation mode, the infiltration measuring device comprises a test die with an opening at the upper part, a water injection sleeve inserted at the top of the test die and a water tank, wherein the test die is fixedly arranged in the water tank through a positioning water tank, the bottom of an inner cavity of the test die is communicated with the positioning water tank, a water inlet is formed in the side wall of the water injection sleeve, and a water outlet is formed in the side wall of the water tank.
As a further implementation manner, the positioning water tank is lower than the water outlet, and the water inlet is higher than the water outlet.
As a further implementation manner, the cross-sectional dimension of the test cavity is the same as the cross-sectional dimension of the drainage ditch sample, and the height of the test cavity is larger than that of the drainage ditch sample.
The beneficial effects of the invention are as follows:
(1) According to the invention, the fly ash is used as the filler for preparing the drainage ditch, the mechanical property, mechanical strength, lubricating property and the like of the prepared resin concrete can be improved at the same time, the dibutyl phthalate is used as the toughening agent, the toughness of the cured epoxy resin adhesive is improved, the bending resistance and impact resistance can be effectively improved, the prepared drainage ditch can be better adapted to the external environment, and the construction waste and the fly ash are used for preparation by the process, so that the manufacturing cost can be reduced, the economic benefit is good, and the solid waste and the like of the waste can be recycled, and the remarkable environmental protection benefit is achieved.
(2) The granular components of the fly ash can lubricate aggregates, improve the roughness coefficient of the prepared drainage ditch, increase the overflow capacity of the drainage ditch, better cope with the complex and changeable water quality environment in rural areas when the drainage ditch is applied to the rural areas, effectively reduce the cross section of the drainage ditch due to the increase of the overflow capacity, and not only facilitate the reduction of materials and cost, but also reduce the construction difficulty.
(3) The epoxy resin disclosed by the invention is of an E-44 type, is lower in viscosity and good in operability, can ensure enough fluidity in preparation, is convenient to mold, is higher in adhesiveness after solidification, is more suitable for preparing resin concrete, is provided with dibutyl phthalate, can improve the bending resistance and impact resistance, and can better adapt to the temperature change of the external environment.
(4) The test mould is connected with the water tank through the positioning water tank, and the positioning water tank is lower than the water outlet, so that the buffer effect can be realized, the water body penetrating through the drainage ditch sample is prevented from directly flowing out of the water tank, the penetrated water body can be discharged after slowly flowing in the water tank, and the accuracy of water flow velocity measurement is effectively ensured.
(5) According to the invention, the height of the water injection sleeve in the infiltration measuring device is adjustable, the replacement of the sample is convenient, repeated tests can be carried out on different drainage ditch samples, and meanwhile, the test parameters (time and water head difference) can be adjusted according to actual requirements, so that the test cost is greatly saved, and the test efficiency is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic cross-sectional view of a linear drain for rural areas according to one or more embodiments of the present invention;
FIG. 2 is a schematic structural view of a permeation assay device according to one or more embodiments of the present invention;
in the figure: the mutual spacing or size is exaggerated for showing the positions of all parts, and the schematic drawings are used only for illustration;
wherein, 1, a grid; 2. a drain body; 3. a water injection sleeve; 4. testing a mold; 5. a drainage ditch sample; 6. a water tank; 7. a water outlet; 8. and positioning the water tank.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
As introduced by the background technology, the compressive strength of the conventional C25 concrete drainage ditch is about 30Mpa, the situations of livestock trampling, tractor rolling, terrain change and the like cannot be well coped with, and the rural sewage pipe network is low in utilization rate due to unstable rural water quality, large water quantity day and night change and discontinuous sewage discharge, so that the conventional C25 concrete drainage ditch is poor in running water property, and in order to adapt to the sewage discharge in the discontinuous state, the problem that the concrete drainage ditch has enough cross-sectional area, high use cost and high construction difficulty is required to be ensured.
Example 1
In an exemplary embodiment of the present invention, as shown in fig. 1, a linear drain for rural area is provided, which includes a grating 1 and a drain body 2, wherein the cross section of a groove inside the drain body 2 is U-shaped, and the grating 1 is mounted on the groove.
The grille 1 is made of stainless steel material; the drainage ditch main body 2 is made of a mixed material, wherein the main material is epoxy resin, the curing agent is modified amine T31 synthesized by phenol, formaldehyde and fatty amine, the diluent is acetone, the toughening agent is dibutyl phthalate, the filler is fly ash, and the aggregate is fine aggregate produced by utilizing construction waste.
The proper filler is added into the resin adhesive to further improve the performance of the resin adhesive, so that on one hand, the mechanical strength and the bonding performance can be improved; on the other hand, the viscosity and the fluidity can be regulated, and the cost can be reduced to a certain extent. The types of fillers commonly selected for epoxy resins are: quartz sand, glass fiber, calcium carbonate, talcum powder, alumina, silica, silicon carbide, metal powder and the like. Different fillers can change different properties of the epoxy resin, such as metal powder and silicon carbide fillers can improve hardness, aluminum oxide fillers can increase adhesion and mechanical strength, glass fiber fillers can increase toughness, and quartz sand fillers can reduce shrinkage and improve wear resistance, lubricating property and the like.
The fly ash is used as the filler for preparing the drainage ditch, the mechanical property, the mechanical strength, the lubricating property and the like of the prepared resin concrete can be improved at the same time, and particularly, the main chemical composition of the fly ash comprises calcium oxide, silicon dioxide, aluminum oxide and complex double salts, the main particle composition comprises glass beads, spongy glass bodies and carbon particles, the granular components can lubricate the aggregates, the roughness coefficient of the prepared drainage ditch is improved, the overflow capacity of the drainage ditch is increased, and when the drainage ditch is applied to rural areas, the drainage ditch can better cope with complex and changeable water quality environments such as domestic sewage, rainwater of mixed mud, irrigation water and the like, the section of the drainage ditch can be effectively reduced due to the increase of the overflow capacity, so that the drainage ditch is convenient to reduce materials and cost, and the construction difficulty can be reduced.
The dibutyl phthalate is used as the toughening agent, so that the toughness of the epoxy resin adhesive after curing is improved, the bending resistance and the impact resistance can be effectively improved, and the prepared drainage ditch can be better adapted to external environments such as temperature changes.
The construction waste and the fly ash are used for technical preparation, so that on one hand, the construction cost can be reduced, the economic benefit is good, and on the other hand, the solid waste of the waste and the like can be reused, and the obvious environmental protection benefit is achieved.
Specifically, in the preparation of resin concrete, common organic matters include unsaturated polyester resin, epoxy resin, furan resin, phenolic resin and the like, wherein the furan resin has poor oxidation resistance, the mechanical property index of the phenolic resin is slightly lower than that of the unsaturated polyester resin and the epoxy resin, and the phenolic resin is widely used in the high-temperature field, and the epoxy resin has better mechanical property than that of the unsaturated resin, has excellent bonding property on various metal materials and nonmetallic materials, is more convenient to be combined with the grid 1, and is more suitable for preparing the resin concrete taking the construction waste as the aggregate in the embodiment.
The epoxy resins commonly used for manufacturing the resin concrete are E-51 and E-44, wherein the E-51 type epoxy resin represents an average epoxy value of 51/100 (0.48-0.54), and the E-44 type epoxy resin represents an average epoxy value of 44/100 (0.41-0.47). Compared with E-51 type epoxy resin, the E-44 type epoxy resin has lower viscosity and better operability, can ensure enough fluidity during preparation, is convenient for molding, has larger adhesiveness after solidification, and is more suitable for preparing resin concrete in the embodiment. However, E-44 resin has higher mechanical strength after curing, but has higher brittleness, and particularly has poorer impact resistance under the low temperature condition, and in order to improve the toughness of the epoxy resin adhesive after curing, a proper amount of dibutyl phthalate is added as a toughening agent so as to improve the bending resistance and the impact resistance of the epoxy resin adhesive.
General researches show that under the same molding condition, the shearing strength of the epoxy resin adhesive can be obviously increased along with the increase of the mass fraction of the fly ash. Through experimental tests, when the mass portion of the fly ash is about 150 (namely, 150 portions of fly ash is mixed by 100 portions of resin), the shearing strength of the adhesive reaches a peak value of about 22MPa. Thereafter, the shear strength slowly decreases as the mass fraction increases. The reason for this phenomenon is that the fly ash reacts under the action of an alkaline excitant due to the chemical activity of silicon dioxide, aluminum oxide and the like in the fly ash, and the fly ash is used as a part of a cementing material to play a role in strengthening. In addition, the fly ash contains a large amount of glass beads, and the spherical small particles are dispersed and distributed in the adhesive layer, so that the stress is uniformly distributed, the internal hardness of the adhesive layer is improved, the shrinkage rate of the adhesive layer is stabilized, and the curing time is shortened.
The best proportion of the fly ash filler can be obtained through researching the mass fraction of the fly ash and the shearing strength of the epoxy resin adhesive. When the mass portion of the fly ash is 150, the prepared epoxy resin adhesive and the aggregate are prepared into resin concrete according to the proportion of 2:8, the compressive strength after curing for one week can reach more than 60MPa, and the compressive strength after curing for one month can reach 80MPa. The content of silicon dioxide, aluminum oxide and ferric oxide in the fly ash accounts for about 90 percent of the total amount of the fly ash, and most of the fly ash is glass solid or hollow spherical particles with the particle size of 1-5 mu m, so that the wetting capacity of the prepared epoxy resin adhesive is greatly improved, aggregates are lubricated, the workability of resin concrete is obviously improved, the prepared concrete is more compact and uniform, and the construction is more convenient. Meanwhile, the fly ash is used as a filler, and the filled fly ash microbeads are also beneficial to lightening the quality of concrete and improving the damage resistance.
Because most rural areas are not hardened on the ground at present, the road has a plurality of mud roads, the traffic flow is low, and large-tonnage vehicles do not basically drive through, the strength requirement on the linear drainage ditch is not as high as that of a city, and if the high-strength resin concrete material is used, the waste is caused, so that the use amount of the epoxy resin adhesive is required to be reduced to reduce the cost.
However, the tendency of the shear strength of the epoxy resin adhesive to increase is limited, and the decrease of the epoxy resin content with the excessive amount of filler leads to the decrease of the bonding area of the adhesive, so that the shear strength of the adhesive is slowly decreased.
Therefore, considering the factors of material hardness, strength, adhesive viscosity, molding curing speed and the like, the ratio of the aggregate, the fly ash and the resin selected in the embodiment is 8:1:1.
In this embodiment, the proportion of the epoxy resin adhesive is the optimal choice of the drain ditch mixture for rural areas, so that the cost is reduced, the bonding area is ensured, and in order to further test the optimal choice of the proportion of aggregate, fly ash and resin, three other groups of mixture samples with other proportions are also provided, wherein the mixture samples are respectively 8.5:0.5:1, 7.5:1.5:1 and 7:2:1.
And respectively measuring the compressive strength, the pipeline roughness coefficient and the permeability of the proportional sample, wherein in the compressive resistance experiment and the pipeline roughness coefficient experiment of the drainage ditch, firstly, the drainage ditch sample is placed in the middle of a lower pressing plate of the testing machine, and an upper pressing plate and the lower pressing plate are filled with a base plate. The supporting surface of the test specimen is perpendicular to the top surface of the molded product, the continuous and uniform loading speed is controlled to be about 0.3MPa/s, the test specimen is slowly pressurized, when the test specimen is close to damage and begins to deform rapidly, the throttle is stopped to be adjusted until the drainage ditch sample is damaged, the damage load is recorded, and the compression strength value is calculated by using an axle center compression strength formula.
The axle center compressive strength formula:
wherein: f (f) c As the axial compressive strength, (MPa);
p: breaking load, (N);
a: area of bearing test piece (mm) 2 )。
The drain roughness coefficient and overload capacity were calculated according to SL155-95 Water engineering (conventional) model test procedure and Darcy-Weissebach equation, manning equation.
darcy-Wei Siba hertz formula:
wherein: h is a f Is the along-the-way head loss, (m);
lambda is the along-the-way head loss coefficient;
l is the distance between the sections, (m);
v is the average flow rate, (m/s);
d is the inner diameter of the pipeline, (m).
Manning formula:
wherein: c is the Xuetalent coefficient, (m) 0.5 S); in the present embodiment
n is a roughness coefficient;
r is the hydraulic radius, r=d/4 in this experiment.
And calculating the overload capacity of the drainage ditch by the following hydraulic formula:
wherein: q is flow, (m) 3 /s)；
A is the cross-sectional area of water, (m) 3 )；
i is the ratio drop.
The permeability coefficient of the drain test sample was measured by the constant head method, and the data of table 1 were obtained by the measurement:
table 1 comparison of drainage ditch samples of different proportions
The calculation result shows that when the ratio of aggregate, fly ash and resin is 8:1:1, the compression strength is the maximum, the compression strength is 47.8MPa, the permeability coefficient is about 2.1, and the roughness coefficient is the maximumIn the turbulent transition zone (v<1.2 m/s) is about 0.015 to about 0.016, in the roughened region (v)>1.2 m/s) is about 0.014 to about 0.015, and the overload flow rate is about: 0.8m 3 The compressive strength of the concrete is about 30Mpa far exceeding that of a conventional C25 concrete drainage ditch, and the concrete is capable of better coping with the conditions of livestock trampling, tractor rolling, terrain change and the like when applied to rural areas, has low sample permeability, is more beneficial to sewage transportation and has larger overload capacity.
Example 2
In another exemplary embodiment of the present invention, a penetration test method for a linear drainage ditch for rural areas is provided, which specifically comprises the following steps:
preparing a drainage ditch sample 5 by using an epoxy resin concrete mixed material, wiping the surface of the drainage ditch sample 5, measuring the height and the bottom area of the drainage ditch sample 5, and spraying glass cement around the drainage ditch sample 5 to cancel a gap between the drainage ditch sample 5 and a permeation measuring device and prevent water from flowing out of the gap;
the infiltration measuring device is shown in fig. 2, and consists of a water injection sleeve 3, a test die 4 and a water tank 6, wherein the test die 4 is of a cube structure with an opening at the upper part and is used for containing a drain ditch sample 5, the cross section size of an inner cavity of the test die 4 is the same as that of the drain ditch sample 5, and the height of the inner cavity of the test die 4 is larger than that of the drain ditch sample 5;
the test die 4 is fixedly arranged in the water tank 6 through the positioning water tank 8, the bottom of the inner cavity of the test die 4 is communicated with the positioning water tank 8, so that water penetrating through the drainage ditch sample 5 can enter the water tank 6 through the positioning water tank 8, a water outlet 7 is arranged on the side wall of the water tank 6 for discharging the water, the positioning water tank 8 is mainly used for buffering the water, the positioning water tank 8 is lower than the water outlet 7, the water penetrating through the drainage ditch sample 5 is prevented from directly flowing out of the water tank 6, the penetrated water can be discharged after slowly flowing in the water tank 1, and the accuracy of water flow rate measurement is effectively ensured;
the water injection sleeve 3 is of a bottom opening structure, a water inlet is formed in the side wall of the top of the water injection sleeve 3, the water injection sleeve 3 is inserted into the top of the test die 4, the inside of the water injection sleeve 3 is communicated with the inner cavity of the test die 4, and the water injection sleeve is mainly used for changing the water head difference between the water outlet 7 and the water inlet.
Placing the drainage ditch sample 5 in the test die 4, sealing by using glass cement, ensuring good sealing performance between the periphery of the drainage ditch sample 5 and the side wall of the test die 4, and connecting a water inlet;
the tap is opened, water is slowly injected from the water inlet, so that the whole water injection sleeve 3 is filled with water from bottom to top, water permeates through the drainage ditch sample 5 and enters the positioning water tank 8, then the water is discharged from the water outlet 7, after the injected water quantity and the water quantity discharged from the water outlet 7 reach an equilibrium state, a stopwatch is started, the water quantity discharged from the water outlet 7 is measured, and the water temperature at the time is measured;
repeating the above operation for different drain samples 5, and recording corresponding data;
the data are collated and the permeability coefficient is calculated.
Wherein, the technical formula of the permeability coefficient is:
wherein: k (K) T Is the permeability coefficient (cm) at a water temperature of T DEG C 3 /s)；
Q is the seepage water yield (cm) in t seconds 3 )；
D is the thickness (cm) of a novel material drainage ditch test piece;
h is the head difference (cm);
Δt is the permeation time(s);
a is the cross-sectional area (cm) of the drain sample 2 )。
In the penetration test method, the self-made penetration test device is utilized for measurement, repeated tests can be carried out on different drainage ditch samples, and test parameters (time and water head difference) can be adjusted according to actual requirements, so that test cost is greatly saved, and test efficiency is improved.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The linear drainage ditch for rural areas is characterized by comprising a drainage ditch main body, wherein a grid is arranged on a groove of the drainage ditch main body, the drainage ditch main body is made of a mixed material, a material main agent of the mixed material is epoxy resin, a curing agent is modified amine T31 synthesized by phenol, formaldehyde and fatty amine, a diluting agent is acetone, a toughening agent is dibutyl phthalate, a filler is fly ash, and an aggregate is fine aggregate produced by using construction waste.
2. The rural linear drainage ditch according to claim 1, wherein the epoxy resin is an E-44 type epoxy resin.
3. A rural linear drainage ditch according to claim 1, wherein the ratio of aggregate, fly ash and epoxy resin is 8:1:1.
4. A rural linear drain according to claim 1, wherein the grille is made of stainless steel material.
5. The linear drainage ditch for rural areas according to claim 1, wherein the particle components of the fly ash are glass beads, spongy glass bodies and carbon particles.
6. A rural linear drainage ditch according to claim 1, wherein the cross section of the channel is U-shaped.
7. A method for penetration testing of a linear drain for rural areas according to any one of claims 1 to 6, comprising the steps of:
preparing a drainage ditch sample by using an epoxy resin concrete mixed material, measuring the height and the bottom area of the drainage ditch sample, and spraying glass cement on the periphery of the drainage ditch sample;
placing a drainage ditch sample in a permeation measuring device, and plugging a gap between the drainage ditch sample and the permeation measuring device by using glass cement;
injecting water into the infiltration measuring device, penetrating the water body through the drainage ditch sample and discharging, starting a stopwatch for timing after the water injection amount and the drainage amount reach balance, simultaneously measuring the discharged water amount, and measuring the water temperature at the moment;
repeating the operation by replacing different drainage ditch samples, and recording data;
the data are collated and the permeability coefficient is calculated.
8. The infiltration testing method for linear drainage ditches for rural areas according to claim 7, wherein the infiltration testing device comprises a test mold with an opening at the upper part, a water injection sleeve inserted at the top of the test mold and a water tank, wherein the test mold is fixedly arranged in the water tank through a positioning water tank, the bottom of an inner cavity of the test mold is communicated with the positioning water tank, a water inlet is arranged on the side wall of the water injection sleeve, and a water outlet is arranged on the side wall of the water tank.
9. The method for testing the penetration of the linear drainage ditch for rural areas according to claim 8, wherein the positioning water tank is lower than the water outlet, and the water inlet is higher than the water outlet.
10. The method for testing the penetration of the linear drainage ditch for the rural areas according to claim 8, wherein the cross section size of the inner cavity of the test die is the same as the cross section size of the drainage ditch sample, and the height of the inner cavity of the test die is larger than the drainage ditch sample.
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| CN219080533U (en) * | 2022-12-22 | 2023-05-26 | 成都建工预筑科技有限公司 | Recycled aggregate U-shaped drainage ditch |
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