CN108169044A - Composite recycled material road surface full scale structure antiscour experimental rig and test method - Google Patents

Composite recycled material road surface full scale structure antiscour experimental rig and test method Download PDF

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Publication number
CN108169044A
CN108169044A CN201711043109.3A CN201711043109A CN108169044A CN 108169044 A CN108169044 A CN 108169044A CN 201711043109 A CN201711043109 A CN 201711043109A CN 108169044 A CN108169044 A CN 108169044A
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CN
China
Prior art keywords
test specimen
bucket
pressure
road surface
full scale
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Pending
Application number
CN201711043109.3A
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Chinese (zh)
Inventor
王笑风
贾敬立
刘筠
郝孟辉
张渊龙
褚付克
杨玉庆
杨博
胡光胜
侯明业
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Engineering Construction Center Of Yellow River River Affairs Bureau In Henan
Henan Provincial Communication Planning and Design Institute Co Ltd
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Engineering Construction Center Of Yellow River River Affairs Bureau In Henan
Henan Provincial Communication Planning and Design Institute Co Ltd
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Application filed by Engineering Construction Center Of Yellow River River Affairs Bureau In Henan, Henan Provincial Communication Planning and Design Institute Co Ltd filed Critical Engineering Construction Center Of Yellow River River Affairs Bureau In Henan
Priority to CN201711043109.3A priority Critical patent/CN108169044A/en
Publication of CN108169044A publication Critical patent/CN108169044A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/56Investigating resistance to wear or abrasion
    • G01N3/567Investigating resistance to wear or abrasion by submitting the specimen to the action of a fluid or of a fluidised material, e.g. cavitation, jet abrasion

Abstract

The invention discloses a kind of composite recycled material road surface full scale structure antiscour experimental rigs, including pedestal, it is provided on the pedestal and washes away bucket for place test specimen, it is described to wash away in bucket the horizontal pressure foot for being provided with up and down reciprocatingly actuating unit driving, the horizontal pressure foot lower surface is provided with pressure sensor, the signal output end of the pressure sensor is connected with the signal input part of pressure controller, and the control output end of the pressure controller is connected with the control signal of the up and down reciprocatingly actuating unit;Also disclose the method for the test specimen of road surface full scale structure being placed on, antiscour experiment being carried out in above device, the flowing pressure and vehicle generated by simulating vehicle load sails out of the souring of the pumping power road pavement semi-rigid type base of moment generation, measure different water temperatures, flowing pressure, effect number and the relationship of base's erosion quantity, so as to analyze, compare and evaluate the erosion resistibility of semi-rigid pavement, scientific basis is provided for pavement material experiment.

Description

Composite recycled material road surface full scale structure antiscour experimental rig and test method
Technical field
The present invention relates to pavement material antierosion experiment equipment technical field, more particularly, to a kind of composite regenerated material Expect road surface full scale structure antiscour experimental rig and test method.
Background technology
A large amount of highway condition investigations show the main reason for base material erosion resistibility deficiency is China's pavement structure damage it One.The purt mud of such as bituminous paving, pit slot, crack, depression, the plat-bottom escape of cement concrete pavement, purt mud or even structural Fracture etc., it is directly related with the erosion resistibility deficiency of base material.
The research of external road pavement Anti brushing Performance starts from the eighties in last century, and the U.S., France and Australia are first The testing equipment and test method of evaluation ground surface material scour resistance are had developed afterwards, as rotating brush damages test method(s) and rotational shear Test method(s), the evaluation index of the two is all scour rate, i.e., the ratio between the test specimen mass loss amount in given time and test specimen gross mass The test specimen mass loss of rotation brushing test is as caused by the pressure abrasion of rotatable wire brush, and effect is washed away in rotational shear experiment Fruit is that the shearing force of surface of test piece is caused using the flow of rotation, has very big difference with practical pressure water stream souring It is different.
In recent years, domestic road worker improves and has developed a variety of base material washout test equipment, mainly adopts at present With shaketalle test method and utilize MTS(Material test system)Apply the washout test method of impact force.Though both test methods The souring of pressure water stream can be simulated, but the amount of force that is subject to of the former test specimen and frequency are unstable, and the latter is controlled by MTS Though the impact force that pressure head processed provides is controllable, wash away that surface of test piece is subject to wash away flowing pressure be it is unknown and uneven, can not Quantitatively judge two big parameters of pressure water stream(Flowing pressure, flow velocity)Influence to base material performance of flushing.Therefore, it is above-mentioned Test method only rests on qualitative stage to the scour resistance evaluation of base material.In addition, MTS belongs to macrotype platform experiment dress It puts, takes up a large area, manufacturing expense is quite high, therefore is not easy to promote.
Invention content
To solve the above-mentioned problems, the present invention provides a kind of simple in structure, easy to make, accurate composite regenerated material of control Expect road surface full scale structure antiscour experimental rig, while provide and a kind of utilize above-mentioned experimental rig progress composite recycled material road surface The method of full scale structure antiscour experiment.
To achieve the above object, the present invention can take following technical proposals:
Full scale structure antiscour experimental rig in composite recycled material road surface of the present invention, including pedestal, sets on the pedestal The bucket that washes away for placing test specimen is equipped with, it is described to wash away in bucket the horizontal pressure for being provided with up and down reciprocatingly actuating unit driving Plate, the horizontal pressure foot lower surface are provided with pressure sensor, the signal output end and pressure controller of the pressure sensor Signal input part be connected, the control signal of the control output end of the pressure controller and the up and down reciprocatingly actuating unit It is connected.
In order to realize automatic adjustment experiment water temperature function, refrigerator and heater, the punching are provided in the pedestal Temperature sensor, the signal output end of the temperature sensor and the signal input part phase of temperature controller are provided in brush bucket Even, control signal of the control output end of the temperature controller respectively with the refrigerator and heater is connected.
In order to facilitate fixed test specimen, test piece fixing device is connected on the bottom plate for washing away bucket, the test specimen is fixed Device is the fixed frame being adapted with test specimen external dimensions.
The up and down reciprocatingly actuating unit includes being arranged on the upright bar washed away around bucket, and the upright bar passes through height adjusting part The cylinder that air compressor machine driving is provided in the support plate washed away above bucket, the support plate is connected with, the cylinder is another End is connected with horizontal pressure foot.Above-mentioned adjustable for height support plate can make test specimen of the experimental rig suitable for a variety of height specifications.
It is reduced in order to avoid washing away inner bucket water amount, described wash away is provided with head cover on bucket, and is offered on the head cover Cylinder perforating.
Full scale structure antiscour test method in composite recycled material road surface of the present invention, using above-mentioned experimental rig, Specific steps include:
The first step makes test specimen according to design requirement;
Second step, after test specimen into the water health 24 hours, taking-up is dried, and is weighed and is recorded;
Third walks, and test specimen is wrapped up with rubber sleave, and rubber sleave certain distance is exposed at the top of test specimen;Then test specimen is put into punching Fixed in brush bucket, to water filling in bucket is washed away, the water surface is higher than test specimen top surface;
4th step sets the water temperature washed away in bucket, washes away hydraulic pressure and wash away number, starts up and down reciprocatingly actuating unit and drives level Pressing plate pumps, and the water between horizontal pressure foot and surface of test piece is made to flow under pressure, and simulation pressure water stream is to examination Part is washed away;
5th step, reach setting wash away number after, up and down reciprocatingly actuating unit is stopped, take out test specimen, dry, weigh simultaneously Record calculates erosion quantity and washes away loss;
6th step carries out parallel test according to above-mentioned steps or repeats to test, and processing data obtain conclusion (of pressure testing).
The test specimen is by asphalt concrete pavement, the composite regenerated base of cement stabilizing, inorganic binder base and lime Stablize soil underlayment to suppress.
It is offered on the test specimen from the asphalt concrete pavement and extends to the composite regenerated base of the cement stabilizing Transverse slot.
Full scale structure antiscour experimental rig in composite recycled material road surface provided by the invention, can simulate because of vehicular load The flowing pressure and vehicle of generation sail out of moment generation pumping power road pavement semi-rigid type base caused by souring, by In above device antiscour is carried out to the road surface test specimen of full scale structure, particularly with crannied composite recycled material road surface test specimen Experiment can measure different water temperatures, different flowing pressure, effect number and the relationship of base's erosion quantity, so as to analyzing, compare and The erosion resistibility of semi-rigid pavement is evaluated, scientific basis is provided for pavement material experiment.
Compared with prior art, the present invention has the following advantages:
1)The specimen thickness of the present invention is capable of the full size thickness of simulated roadway structure completely;
2)Wide 1-3mm that the present invention is dug on shaping test piece, long 300mm, depth to the composite regenerated base bottom surface of cement stabilizing Transverse slot, influence of the reflection crack to asphalt surface course that can be completely after simulated roadway base course crack;
3)The present invention can wash away the hydrodynamic pressure value in bucket by adjusting the pressure change of air compressor machine, while can adjust and wash away Frequency, the temperature of flush water, so as to preferably simulate the live physical condition of bituminous paving;
4)The present invention is capable of the actual conditions of simulated roadway, and road pavement applies the uniform flowing pressure effect of continued for constant, accurately Frequency and souring power are washed away in control, so as to examine the scour resistance of pavement material, obtain road surface under the conditions of different tests The rule of scour resistance;
5)The device of the invention has " pump-absorb action " during experiment, i.e. water washes away and aspirates two parts, makes pull of vacuum Effect it is more obvious;
6)Structure below at the top of test specimen of the present invention will not be washed away, and only be made in environment is washed away at the top of test specimen, with road surface The phenomenon that truth is consistent, and improves in original test method test specimen following side by current scour, and material peels off;
7)The present invention with《Highway engineering stabilized with inorganic binder testing of materials regulation》(JTG E51-2009)The MTS of middle T0860 Or other testing equipments that can apply oscillatory load are compared, and it is small, it is easy to operate, it is economical and practical, convenient for promoting.
Description of the drawings
Fig. 1 is the structure diagram of the present invention.
Fig. 2 is the structure diagram of test specimen of the present invention.
Specific embodiment
As shown in Figure 1, full scale structure antiscour experimental rig in composite recycled material road surface of the present invention, including pedestal 1, heater 2 and refrigerator 3 can be set in pedestal, be additionally provided on pedestal 1 wash away bucket 4 and it is multiple be located at wash away it is vertical around bucket 4 Bar 5 is provided with by height adjusting part installation there are one the support plate 6 for washing away 4 top of bucket, 6 lower section of support plate is located in upright bar 5 For providing the horizontal pressure foot 9 for washing away hydraulic pressure.Specifically, 8 pedestal of cylinder and piston rod driven by air compressor machine 10 respectively with branch Fagging 6 is connected with horizontal pressure foot 9, and cylinder 8 takes out, is vented horizontal pressure foot 9 is made to move up and down repeatedly, forces and washes away water flowing in bucket 4 Souring power is generated to test specimen, simulates practical road deck bottom wash away phenomenon.In addition, above-mentioned up and down reciprocatingly actuating unit also can be used Other common reciprocating drive mechanisms replace.For waterproof, closed type telescopic sleeve 7 is housed in 8 outer sheath of cylinder.In order to detect The size of scouring force, is provided with pressure sensor 11 in 9 lower surface of horizontal pressure foot, and the signal output end of pressure sensor 11 with The signal input part of pressure controller 12 is connected, the control output end of pressure controller 12 and the control signal phase of air compressor machine 10 Even, horizontal pressure foot 9 is made to be automatically moved back and forth according to the realization of the experiment hydraulic pressure of setting;Meanwhile it can be set by pressure controller 12 Wash away number(Generally 6000 times or so), make device washing away pressure, wash away number and test test specimen according to setting.For It avoids washing away clear water spillage in bucket and causes discharge reduction, rubber head cover is provided on bucket 4 is washed away, cylinder 8 makes across head cover Pressing plate 9 is in below head cover.In order to facilitate fixed test specimen, test piece fixing device is provided with washing away in bucket 4.Specifically, the examination Part fixing device is screwed onto the support post 13 for washing away 4 barrels of bottoms of bucket including multiple, and each support post 13 is with being fixed on test specimen week The retainer ring 14 enclosed is connected.It, can be straight in bucket 4 to washing away in the case that test requirements document water temperature and ambient temperature are not much different Connect injection room temperature clear water;Conversely, in order to realize automatic adjustment experiment water temperature function, temperature sensing can be provided with washing away in bucket 4 Device 15, and the signal output end of temperature sensor 15 is connected, and temperature is controlled with the signal input part of temperature controller 16 The control output end of device 16 and the control signal of heater 2 and refrigerator 3 are respectively connected with, make to wash away water temperature in bucket 4 according to Test requirements document automatically adjusts.
The present invention can carry out antiscour experiment to the test specimen of multiple road structure, since the bituminous paving of semi-rigid type base leads to Often it will appear crack, souring can be generated after moisture enters base causes road surface to generate early damage, therefore below with " table The test specimen simulation flowing pressure that crannied composite recycled material road surface full scale structure is dug in face is firm to band crack bituminous paving half Property base souring " for come illustrate the present invention test method.
Specifically, as shown in Fig. 2, experiment test specimen is the compound using cement stabilizing of 300mm × 300mm × 450mm The rut test piece of Recycling Base full scale structure, underlayment 17 are the lime stabilization soil layer of 150mm, are followed successively by underlayment 17 The inorganic binder base 18 of 50mm, the composite regenerated base 19 of the cement stabilizing of 200mm(Above-mentioned composite recycled material is by practical road Face asphalt surface course and the milling material of part base are composite regenerated after adding in a certain amount of cement and newly gathering materials to be formed)With the base of 50mm Matter bitumen A C-13C concrete toppings 20 are opened from matrix pitch concrete topping 20 to the composite regenerated extension of base 19 of cement stabilizing It is carved with a long 50mm, wide 3mm, the transverse slot 21 that depth is 250mm.Road surface permeable layers and sealing are not provided in test specimen.
Test procedure is as follows:
(1)By for make this experiment test specimen used in lime stabilized soil, inorganic binder, the composite regenerated milling of cement stabilizing Material determines maximum dry density and optimum moisture content by current specifications, and by Pavement Design compactness weighing, with edge runner profiled sheeting Formula test specimen, health finish the molding into asphalt concrete pavement, and track die trial is gradually increased to 450mm, completes specimen molding.
(2)In order to simulate the scouring effect to road surface of cracking, then a long 50mm, width 3mm, depth are opened on shaping test piece Transverse slot for 250mm.
(3)In order to which simulated roadway is satisfied the unfavoured state of water, after test specimen into the water health 24 hours, take out, carry out outer It sees and checks, ensure no apparent damage, dry surface moisture, weigh and record initial weight m0
(4)Test specimen side is washed away by dynamic water in order to prevent, below the 20mm portion envelops rubber sleave 22 at the top of test specimen, Test specimen is socketed in retainer ring later and is put into wash away in bucket and is positioned by support post, injected clear water makes to wash away bucket In the water surface higher than test specimen top surface 20mm or so.
(5)Set wash away inner bucket water temperature as 20 DEG C, wash away that hydraulic pressure is 50KPa, to wash away number be 6000 times, start air compressor machine Pressing plate is made to move back and forth above and below, simulates the scouring effect of pressure water stream road pavement.
(6)Test specimen is taken out, dries surface of test piece moisture, then weighing is calculated as m1, calculate erosion quantity(m0 -m1)It is damaged with washing away Lose P,
(7)3-5 parallel laboratory test is carried out according to above-mentioned steps, is cast out after washing away the data of loss P coefficient of variation > 15%, Laboratory mean values are taken as final result.
Problems with should be paid attention in above-mentioned washout test:
1)During shaping test piece, each layer of mixture should all be molded by the compactness at indoor maximum dry density × scene, this Sample can preferably simulated roadway actual state.
2)Other than test specimen is washed away loss in addition to top surface, other positions, which should not have, significantly washes away loss, the otherwise secondary examination It is invalid to test.
3)The stability for washing away bucket and test specimen should be in test remained, if washing away bucket or test specimen loosens, Ying Li Stop experiment, can continue after reinforcing.
4)Rubber head cover is covered with although washing away on bucket, the water washed away in bucket in experiment can also be splashed out inevitably, be Guarantee test stability, does not influence pump-absorb action, timely moisturizing is answered in test process.
It is attached:The calibration of flowing pressure
In order to which flow is made to generate enough pressure of washing away to test specimen, the present inventor, which is investigated air compressor machine and washes away, moves hydraulic pressure in bucket The relationship of power, it is specific as shown in table 1:
1 air compressor machine pressure of table is with washing away the flowing pressure table of comparisons in bucket

Claims (8)

1. a kind of composite recycled material road surface full scale structure antiscour experimental rig, it is characterised in that:Including pedestal, the pedestal On be provided with the bucket that washes away for placing test specimen, it is described to wash away in bucket the level for being provided with up and down reciprocatingly actuating unit driving Pressing plate, the horizontal pressure foot lower surface are provided with pressure sensor, and signal output end and the pressure of the pressure sensor control The signal input part of device is connected, and the control output end of the pressure controller and the control of the up and down reciprocatingly actuating unit input End is connected.
2. full scale structure antiscour experimental rig in composite recycled material road surface according to claim 1, it is characterised in that:Institute It states and refrigerator and heater is provided in pedestal, described wash away is provided with temperature sensor in bucket, the letter of the temperature sensor Number output terminal is connected with the signal input part of temperature controller, the control output end of the temperature controller respectively with the refrigeration Device is connected with the control signal of heater.
3. full scale structure antiscour experimental rig in composite recycled material road surface according to claim 1, it is characterised in that: Test piece fixing device is connected on the bottom plate for washing away bucket, the test piece fixing device is adapted with test specimen external dimensions Fixed frame.
4. full scale structure antiscour experimental rig in composite recycled material road surface according to claim 1, it is characterised in that:Institute It states up and down reciprocatingly actuating unit to include being arranged on the upright bar washed away around bucket, the upright bar is connected with by height adjusting part to be located at The support plate above bucket is washed away, the cylinder of air compressor machine driving is provided in the support plate, the cylinder other end is pressed with horizontal Plate is connected.
5. full scale structure antiscour experimental rig in composite recycled material road surface according to claim 4, it is characterised in that:Institute It states to wash away and head cover is provided on bucket, cylinder perforating is offered on the head cover.
6. a kind of composite recycled material road surface full scale structure antiscour test method, it is characterised in that:Using described in claim 1 Experimental rig, specific steps include:
The first step makes test specimen according to design requirement;
Second step, after test specimen into the water health 24 hours, taking-up is dried, and is weighed and is recorded;
Third walks, and test specimen is wrapped up with rubber sleave, and rubber sleave certain distance is exposed at the top of test specimen;Then test specimen is put into punching Fixed in brush bucket, to water filling in bucket is washed away, the water surface is higher than test specimen top surface;
4th step sets the water temperature washed away in bucket, washes away hydraulic pressure and wash away number, starts up and down reciprocatingly actuating unit and drives level Pressing plate pumps, and the water between horizontal pressure foot and surface of test piece is made to flow under pressure, and simulation pressure water stream is to examination Part is washed away;
5th step, reach setting wash away number after, up and down reciprocatingly actuating unit is stopped, take out test specimen, dry, weigh simultaneously Record calculates erosion quantity and washes away loss;
6th step carries out parallel test according to above-mentioned steps or repeats to test, and processing data obtain conclusion (of pressure testing).
7. full scale structure antiscour test method in composite recycled material road surface according to claim 6, it is characterised in that:Institute It is by asphalt concrete pavement, the composite regenerated base of cement stabilizing, inorganic binder base and lime stabilized soil base to state test specimen Lamination is made.
8. the test method of full scale structure antiscour experimental rig in composite recycled material road surface according to claim 7, It is characterized in that:It is offered on the test specimen from the asphalt concrete pavement and extends to the composite regenerated base of the cement stabilizing Transverse slot.
CN201711043109.3A 2017-10-31 2017-10-31 Composite recycled material road surface full scale structure antiscour experimental rig and test method Pending CN108169044A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109490068A (en) * 2018-12-19 2019-03-19 西北工业大学 Work condition analogue device and the method using the unit simulation mine scouring state are washed away in mine probing
CN109932260A (en) * 2019-03-19 2019-06-25 北京科技大学 A kind of the wheel tracking test system and test method of asphalt mixture hydrodynamic pressure environment
CN110618050A (en) * 2019-09-27 2019-12-27 长安大学 Base material washout test device based on wheel load
CN112113872A (en) * 2020-09-24 2020-12-22 华北水利水电大学 Inorganic binder stable material scouring simulation test device and detection method
CN113109174A (en) * 2021-03-01 2021-07-13 绍兴文理学院 Riparian rock structural plane shear strength testing device for simulating water flow extrusion
CN114088566A (en) * 2021-11-17 2022-02-25 湖南省交通科学研究院有限公司 Anti-scouring performance test system of road bed layer material
CN114814168A (en) * 2022-04-26 2022-07-29 昆明理工大学 Testing device for reinforcing fractured rock test piece through microbial grouting

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CN203299068U (en) * 2013-05-31 2013-11-20 长安大学 Anti-washout test device for inorganic binder stabilizing material
CN105203421A (en) * 2015-10-19 2015-12-30 长安大学 Road material washing test device adopting electromagnetic driving
CN205643059U (en) * 2016-03-25 2016-10-12 广西交通科学研究院 Measurement device for cement concrete pavement top layer scour resistance ability
CN106092733A (en) * 2016-08-25 2016-11-09 吉林大学 Bituminous pavement top material moves water washout test instrument and dynamic water scouring test methods
CN106644788A (en) * 2016-11-11 2017-05-10 长安大学 A tester and testing method for stimulating fatigue load and dynamic water erosion action
CN207336277U (en) * 2017-10-31 2018-05-08 河南省交通规划设计研究院股份有限公司 Composite recycled material road surface full scale structure antiscour experimental rig

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US5659140A (en) * 1996-08-13 1997-08-19 Pavement Technology, Inc. Testing machine for pavement samples
CN1687775A (en) * 2005-04-27 2005-10-26 吕彭民 Scouring simulation test equipment and method for base course of cracked asphalt pavement from dynamic hydraulic pressure
CN101762433A (en) * 2009-12-29 2010-06-30 长安大学 Pneumatic base material washout tester
CN203299068U (en) * 2013-05-31 2013-11-20 长安大学 Anti-washout test device for inorganic binder stabilizing material
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CN207336277U (en) * 2017-10-31 2018-05-08 河南省交通规划设计研究院股份有限公司 Composite recycled material road surface full scale structure antiscour experimental rig

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109490068A (en) * 2018-12-19 2019-03-19 西北工业大学 Work condition analogue device and the method using the unit simulation mine scouring state are washed away in mine probing
CN109490068B (en) * 2018-12-19 2021-02-02 西北工业大学 Mine drilling scouring condition simulation device and method for simulating mine scouring state by using same
CN109932260A (en) * 2019-03-19 2019-06-25 北京科技大学 A kind of the wheel tracking test system and test method of asphalt mixture hydrodynamic pressure environment
CN110618050A (en) * 2019-09-27 2019-12-27 长安大学 Base material washout test device based on wheel load
CN112113872A (en) * 2020-09-24 2020-12-22 华北水利水电大学 Inorganic binder stable material scouring simulation test device and detection method
CN113109174A (en) * 2021-03-01 2021-07-13 绍兴文理学院 Riparian rock structural plane shear strength testing device for simulating water flow extrusion
CN114088566A (en) * 2021-11-17 2022-02-25 湖南省交通科学研究院有限公司 Anti-scouring performance test system of road bed layer material
CN114088566B (en) * 2021-11-17 2023-11-03 湖南省交通科学研究院有限公司 Anti-scouring performance test system for road base material
CN114814168A (en) * 2022-04-26 2022-07-29 昆明理工大学 Testing device for reinforcing fractured rock test piece through microbial grouting

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