Highway subgrade filler anti-scouring performance test device and method
A technology of roadbed filler and test device, applied in the direction of measuring device, analyzing material, strength characteristics, etc., can solve the problems of inconsistency and no unified conclusion, and achieve the effect of high authenticity, simple structure and improving work efficiency.
Active Publication Date: 2021-04-30
CHINA ROAD & BRIDGE
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Problems solved by technology
[0007]
1) The rotating brush test is mentioned in the paper "Study on the Erosion Resistance Test Method of Semi-rigid Base Materials" published by Sha Aimin and Hu Liqun. The friction of the rotating shear test is caused by the friction of the rotating shear test, which is caused by the shearing force of the rotating water flow on the surface of the test piece. The whole test process does not involve water, which is inconsistent with the actual situation;
[0008]
2) The evaluation indicators of the rotating brush test and the rotating shear test both use the scour rate of the sample, but there is no unified conclusion for the selection of the corresponding time period of the scour rate;
[0009]
3) At present, there is no standard test method generally recognized by scholars for evaluating the erosion resistance of roadbed fillers
Method used
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[0054] Example: such as figure 1 and figure 2 As shown, the roadbed filler anti-scouring performance test device adopted by the inventive method is composed of a heater 1, a temperature adjustment button 2, a temperature display screen 3, a water tank 4, a water inlet valve 5, a drain valve 6, a water level sensor 7, and an adjustment button 8. Power switch 9, main controller 10, manual rotating wheel 11, cross bar 12, piston rod 13, sample tray 14, piston system 15, sampling cylinder 16, window 17, flushing pipe 18, flow meter 19, water guide pipe 20. Filter 21, sedimentation tank 22, protective cover 23, flow control valve 24, gear box 25, motor 26, water pump 27, fixing bolt 28, stirring paddle 29, ordinary filter 30, composite material filter 31, half Composed of permeable membrane 32, reducer 33 and displacement sensor 34, wherein: heater 1, water inlet valve 5, drain valve 6, water level sensor 7 are installed in water tank 4, heater 1 includes temperature adjustment ...
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The invention discloses a highway subgrade filler anti-scouring performance test device and method, the device comprises a water tank, a sampling cylinder, a scouring pipeline and a sample pushing mechanism, a water inlet and a water outlet of the scouring pipeline are connected with the water tank, and the scouring pipeline is provided with a horizontally arranged transparent observation pipe section for observation; an opening is formed in the pipe wall of the bottom of the transparent observation pipe section, and a vertically-arranged sampling barrel is detachably connected to the opening in a sealed mode; and the sample pushing mechanism is used for feeding a sample into the scouring pipeline at a certain speed, and the related measuring device is used for measuring the physical quantity required in the process. Compared with other scouring test methods, the test method has the advantages that the scouring force of the water flow acting on the surface of the test sample can be controlled by adjusting the flow control valve under the condition of keeping the undisturbed soil, and the test conditions of the roadbed material in the scouring test process can be individually adjusted according to the actual situation; and therefore, qualitative and quantitative evaluation can be carried out on the anti-scouring performance of the corresponding soil sample.
Description
technical field [0001] The invention relates to a test device for the anti-scour performance of roadbed filler, which belongs to the field of test means for the anti-scour performance of road engineering materials. Background technique [0002] The research on the scouring characteristics of roadbed materials originated in the United States in the 1980s, and then relevant professional researchers in various countries also began a large number of researches on the anti-scouring performance of roadbed fillers, and correspondingly achieved many fruitful results. Among them, Tia, Dixon, Dempsey, Van wijk, Hansen, Robertson, etc. are the main representatives. [0003] The early scouring test method was mainly in France. In France, the scouring test mainly used rotating steel wires to simulate the scouring process of water flow on roadbed fillers. The surface of the test device is abraded, and the test mass of each sample is abraded by a wire brush as a measure of the scouring pe...
Claims
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Login to View More IPC IPC(8): G01N3/02G01N3/56
CPCG01N3/02G01N3/567
Inventor 王凡超汪淼吕延章定文罗志刚
Owner CHINA ROAD & BRIDGE