Geotextile clamping device, testing machine and geotextile testing method
A technology of geotextile and clamping device, which is applied in the direction of measuring device, applying stable tension/pressure to test the strength of materials, instruments, etc., can solve problems such as integration into a whole, single test function, test effect and efficiency to be improved, etc. Achieve the effects of uniform clamping force, simple use, and improved test efficiency
Pending Publication Date: 2022-07-29
SHANGHAI WATERWAY ENG DESIGN & CONSULTING CO LTD
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Problems solved by technology
In recent years, burst and puncture testing machines with new clamping tools have also appeared, such as manual hydraulic clamping devices, which have improved efficiency, but they have not been integrated with the testing machine, and they all have a single test function. Effectiveness and efficiency still need to be improved
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Embodiment Construction
[0038] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0039] The mechanical strength index of geotextile includes burst strength and puncture strength. Bursting strength is an index to measure the ability of geotextiles to resist concentrated normal load through a simulation test, to simulate the situation that a geotextile is pierced by sharp-edged stone blocks on uneven foundations; An indicator of the normal load capacity, simulating the situation in which a sharp-edged stone pierces a geotextile. Both the burst strength test and the puncture strength test are obtained by applying a load perpendicular to the plane of the sample to the geotextile sample in the annular clamping device by a mandrel indenter 16. Among them, the burst strength test is performed according to The shape of the ejector head 16 is divided into cylindrical (CBR) bursting strength and spherical bursting strength.
[0040] The geo...
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A geotextile clamping device comprises a first pressing plate and a second pressing plate which are oppositely arranged, and further comprises a pneumatic device, the first pressing plate and the second pressing plate are both arranged above the pneumatic device, one of the first pressing plate and the second pressing plate is connected to the pneumatic device and driven by the pneumatic device, and the other of the first pressing plate and the second pressing plate is connected to the pneumatic device and driven by the pneumatic device. And the first pressing plate and the second pressing plate move relatively. The pneumatic device is preferably an air cylinder. The invention further provides a testing machine provided with the clamping device and a testing method of the testing machine. According to the pneumatic pressurizing clamping device, a test sample is clamped through the air pressure principle, a manual tightening mode is not used any more, the clamping force is uniform, the clamping efficiency is high, power clamping is adopted, use is easy and convenient, and the test efficiency is improved. The first puncturing plate and the second puncturing plate can be detachably mounted on the geotextile clamping device, and the geotextile clamping device can also be used for a geotextile puncturing experiment.
Description
technical field [0001] The invention belongs to the field of bursting and puncturing tests of geotextiles, and relates to a clamping device and an operation method for bursting and puncturing of geotextiles. Background technique [0002] Bursting and puncturing strength directly reflect the durability of deformation and rupture under external pressure, and are the conventional mechanical test indicators of geotextiles. The test frequency is high. Between the rings, the ejector rod presses the sample vertically at a constant rate, and records the relationship curve of the ejection pressure-displacement, the bursting strength and the bursting displacement. The speed and displacement of the traditional test equipment can be controlled by the servo motor. The clamping device of the sample is manually tightened. Before the test, the sample needs to be manually cut and installed manually. In order to ensure that the sample can be clamped, more than 8 bolt groups are generally set....
Claims
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IPC IPC(8): G01N3/04G01N3/08
CPCG01N3/04G01N3/08G01N2203/0003G01N2203/0019G01N2203/0411
Inventor 凌柏平常林蔡晨雨苏俊剑陈琪林吴秋红
Owner SHANGHAI WATERWAY ENG DESIGN & CONSULTING CO LTD