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Mold for preparing test piece of geotechnical model and preparation method

A model test and specimen technology, which is applied in the field of tunnel engineering and geotechnical engineering, can solve the problems of damage, easy defect of specimen, disturbance and destruction, etc., and achieve the effects of avoiding leakage, low cost, avoiding disturbance and destruction

Active Publication Date: 2020-01-03
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to overcome the deficiencies of the prior art, the present invention provides a mold for preparing rock and soil model test specimens, which effectively solves the problem that the specimens are easily damaged and damaged when the traditional columnar specimen mold is demoulded, and at the same time avoids the The disturbance and destruction after demolding ensure the uniformity and compactness of the test piece, avoid the leakage of liquid cement or regulator during the preparation of the test piece, ensure the accuracy of the proportion of similar materials of the test piece, and can Meet the preparation requirements of test pieces of different heights

Method used

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  • Mold for preparing test piece of geotechnical model and preparation method
  • Mold for preparing test piece of geotechnical model and preparation method
  • Mold for preparing test piece of geotechnical model and preparation method

Examples

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Effect test

Embodiment 1

[0051] In a typical embodiment of the present invention, such as figure 1 and figure 2 As shown, a mold for preparing rock and soil model test specimens includes a mold support frame 1, a test piece tube 2, a push rod 3, and a pressing plate 4. The mold support frame 1 is used to limit the test piece tube 2, and the model The support frame 1 is higher than the test piece cylinder 2 to support the push rod 3, the top of the test piece cylinder 2 is provided with a cylinder cap 8, the cylinder cap 8 is set higher than the specimen cylinder 2, and the cylinder cap 8 is connected to the specimen cylinder 2 , the test piece cylinder 2 can move freely vertically in the support frame 1 by pulling the cylinder cap 8 , the pressure plate 4 is located in the inner cavity of the test piece cylinder 2 , and the pressure plate 4 is welded with the push rod 3 .

[0052] Among them, such as Figure 6 As shown, the push rod 3 is provided with pin holes every set distance such as one centim...

Embodiment 2

[0059] A kind of preparation method that is used to prepare rock-soil model test specimen, adopts a kind of mold that is used to prepare rock-soil model test specimen described in embodiment 1, comprises the following contents:

[0060] Step 1: According to the required mixing ratio, prepare the similar material 7 of the test piece with the set ratio and fully stir;

[0061] Step 2: After adjusting the length of the push rod 3 entering the test piece cylinder 2 according to the size requirements of the test piece, pass the second pin through the second pin hole of the cylinder cap 8 and the pin hole at the corresponding position of the push rod 3, and the first pin Pass through the first pin hole of the cross bar 6 of the mold support frame and the pin hole at the corresponding position of the push rod 3;

[0062] Step 3: After inverting the mold, add the stirred sample similar material 7 into the test piece cylinder 2 and fully tamp it;

[0063] Step 4: After erecting the mo...

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Abstract

The invention discloses a mold for preparing a test piece of a geotechnical model and a preparation method, solves the problems in the prior art that the molds preparing test pieces are complicated instructure, and the uniformity and compactness of the test pieces cannot be guaranteed, and has the beneficial effects of effectively guaranteeing the compactness of the prepared test pieces and effectively facilitating the later demoulding. The solution is that the mold for preparing the test piece of the geotechnical model comprises a test piece cylinder for filling materials similar to the testpiece and mold support frames erected around the test piece cylinder, wherein a pressing plate is provided in the test piece cylinder and is connected to a pushing level running through one end surface of the test piece cylinder, and the other end surface of the test piece cylinder is opened; the test piece cylinder can realize movement along the inner side of the mold support frames under external force, and the mold support frames are detachably connected to the pushing level to realize adjustable height of the pushing level inserted into the test piece cylinder, so that the pushing level and the pressing plate perform vibration effect on one side of the material similar to the test piece in the test piece cylinder.

Description

technical field [0001] The invention relates to the fields of geotechnical engineering and tunnel engineering, in particular to a mold for preparing rock and soil model test specimens and a preparation method. Background technique [0002] Model testing has become one of the commonly used scientific research methods in geotechnical engineering, tunnel engineering and other disciplines. Equipping qualified specimens with similar materials is an important basis for the success of model testing. In order to find a suitable material mix ratio, it is necessary to prepare different materials. Various physical and mechanical properties tests such as compressive strength test and elastic modulus test were carried out on the test pieces with the mix ratio. [0003] The test pieces are usually made of fine sand, calcium carbonate, iron powder, gypsum powder and other materials as aggregates, white cement, chlorinated paraffin, vaseline, water glass and other materials are used as ceme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/36
CPCG01N1/36G01N2001/366
Inventor 薛翊国公惠民宁泽旭周炳桦李广坤
Owner SHANDONG UNIV
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