Saturator, triaxial test sample preparation device and sample preparation method
A triaxial test and sample tube technology, which is used in measuring devices, preparation and sampling of samples for testing, etc., can solve problems such as damage to samples, sample damage, and sample surface damage, so as to reduce the degree of damage and the number of sampling times. The effect of reducing, reducing the degree of damage
Active Publication Date: 2022-04-22
JIANGSU UNIV OF SCI & TECH
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Problems solved by technology
In the current common saturator used for sample preparation, the sample preparation cylinder is composed of three-lobe moulds, and the single-lobe mold has a large contact area with the sample, which is easy to cause damage to the sample during sampling, and the sampling needs to be carried out three times. more
After the sampling is completed, the casing work is carried out, and the sample is prone to secondary damage during the casing
Such as CN109531798A, it has the following problems: (1) adopt three lobe molds to sample, promptly exist the problem that petal mold and sample contact area are big when demoulding, sampling frequency is many, and sample surface is easily damaged; (2) is used for sampling There is no suitable force application point for the valve annulus, and it is easy to apply force unevenly during sampling to distort the valve mold and damage the sample; (3) There is no limit on the outside of the three-lobe mold during sampling, and it may obliquely carry the surface when the valve mold is about to peel off. The soil slides down and destroys the specimen
Another example is CN103969081A, which has the following problems: (1) the point of application of force is single when pressing down to sample, which is not in the vertical direction when easily causing the three-lobe mold to sample, so that the sample is squeezed and deformed by the three-lobe mold; (2) disposable when sampling Breaking away from the three-lobe mold, the contact area between the mold and the sample is relatively large, which is easy to cause damage to the surface of the sample; (3) The sample taken out is located in the piston cover and needs to be taken out again, and the sample needs to be covered with a film during the test, and the steps are cumbersome , easy to cause damage to the sample
Method used
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[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0031] Such as figure 1 The shown triaxial test sample preparation device includes a sampler 1 , a saturator 2 and a limit sleeve 3 .
[0032] combine figure 2 and image 3 , the sampler 1 includes a sampling sleeve 11, a sampling iron ring 12, and a magnetic pressure ring 13 arranged sequentially from top to bottom, and pressure rods 14 are arranged on both sides of the magnetic pressure ring 13, and the pressure rod 14 is plugged with the magnetic pressure ring 13. . The sampling sleeve 11 is provided with an air extraction hole 16 , and the top of the outer wall of the sampling sleeve 11 is provided with a circumferential groove 15 . The top of the sampling sleeve 11, the bottom of the sampling iron ring 12 and the top of the magnetic pressure ring 13 are all smoothed to avoid damaging the rubber membrane.
[0033] combine Figure 4 to Figure 8 , th...
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The invention discloses a saturator, a triaxial test sample preparation device and a sample preparation method. In the saturator, a first cylinder unit comprises two semicircular outer shells, and a 1 / 4 circular inner shell is fixed on the inner walls of the semicircular outer shells; the second cylinder body unit comprises a fixing ring and two 1 / 4 circular inner shells which are oppositely arranged in the fixing ring; the two semicircular outer shells are enclosed to form an outer cylinder, and the four 1 / 4 circular inner shells are enclosed to form an inner cylinder; an outer sleeve ring is arranged on the inner cylinder, and a force application hole for inserting the pressing rod is formed in the outer sleeve ring; the outer lantern ring is located at the top of the outer cylinder and below the fixing ring; the sampler comprises a sampling sleeve, a sampling iron ring and a magnetic pressing ring which are sequentially arranged from top to bottom, and a pressing rod is arranged on the magnetic pressing ring; the limiting sleeve comprises a sleeve body and a detachable base, a strip-shaped opening matched with the pressing rod is formed in the sleeve body, and a screw hole used for fixing the sampling sleeve is formed in the top of the sleeve body. The sampling frequency and the contact area of the single petal mold and the sample can be reduced, sampling and film sleeving can be synchronously carried out, the integrity from sample sampling to film sleeving is guaranteed, and the data reliability is improved.
Description
technical field [0001] The invention relates to the preparation of rock and soil engineering triaxial test samples, in particular to a saturator, a triaxial test sample preparation device and a sample preparation method. Background technique [0002] Triaxial test is a reliable method to obtain physical parameters of rock and soil in geotechnical engineering. The quality of sample preparation in the test has an important impact on the test accuracy and data reliability. In the current common saturator used for sample preparation, the sample preparation cylinder is composed of three-lobe moulds, and the single-lobe mold has a large contact area with the sample, which is easy to cause damage to the sample during sampling, and the sampling needs to be carried out three times. more. After the sampling is completed, the casing work is carried out, and the sample is prone to secondary damage during the casing. Such as CN109531798A, it has the following problems: (1) adopt three ...
Claims
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IPC IPC(8): G01N1/28G01N1/36
CPCG01N1/28G01N1/36G01N2001/366Y02E30/30
Inventor王丽艳刘涛袁野王炳辉张雷徐浩青吴思麟吉文炜李广祥
OwnerJIANGSU UNIV OF SCI & TECH