Manufacturing mould for annular shearing test sample

A mold and ring shearing technology, which is applied in the field of making molds for ring shear test specimens, can solve problems such as damage, errors, and soil deformation, and achieve the effects of avoiding human errors, simple demoulding of samples, and avoiding disturbances

Pending Publication Date: 2017-07-28
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, the volume of the sample cannot be precisely controlled, which will cause a large error for tests with high density requirements, and secondly, the soil will be squeezed during the operation
Deform the soil before the test; finally, for foam light

Method used

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  • Manufacturing mould for annular shearing test sample
  • Manufacturing mould for annular shearing test sample
  • Manufacturing mould for annular shearing test sample

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Utilize ring shear sample mold of the present invention to prepare the ring shear sample of remodeling soil, concrete steps are as follows:

[0028] (1) Prepare raw materials: completely dry the original soft clay, crush it through a 1mm sieve with a pulverizer, remove foreign matter in the soil, and weigh soil, cement, and water according to a certain ratio;

[0029] (2) Prepare the mold: this sample preparation utilizes the non-hole mold of the present invention, and the inner wall is all smeared with vaseline

[0030] (3) Sample preparation: Mix the weighed dry soil, cement and water evenly to form a slurry, pour it into the mold three times, and compact it with a compactor;

[0031] (4) Conservation and sample preparation: adjust the height of the annular cover 4, and seal and maintain the sample for 28 days; keep the temperature at 24° C. and the humidity at about 60 during the maintenance.

[0032] (5) Form removal and sampling: remove the ring cover 4, remove th...

Embodiment 2

[0034] Utilize ring shear sample mold of the present invention to prepare the ring shear sample of solidified light soil, concrete steps are as follows:

[0035] (1) Prepare raw materials: completely dry the undisturbed soft clay, crush it through a 1mm sieve with a pulverizer, take out sundries in the soil, and weigh dry soil, curing agent, foaming agent and water according to a certain proportion;

[0036] (2) Prepare the mould: this sample preparation utilizes the mold with holes of the present invention to wrap the outside of the inner ring 1, the inner side of the outer ring 2, and the top of the base 3 with an air-permeable and water-impermeable film;

[0037] (3) Sample preparation: Stir the weighed dry soil, curing agent, foaming agent and water evenly, pour them into the mold three times, and compact them with a compactor.

[0038] (4) Sample curing: put a breathable and impermeable film on the top of the sample, adjust the height of the ring cover 4, and seal the sam...

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PUM

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Abstract

The invention relates to a manufacturing mould for an annular shearing test sample. The manufacturing mould comprises a base 3. The manufacturing mould is characterized by further comprising an inner ring 1, an outer ring 2, a base 3 and an annular cover 4; an inner annular slot and an outer annular slot which are respectively used for accommodating the inner ring 1 and the outer ring 2 are formed on the base; the inner annular slot and the outer annular slot are concentric with each other; the outer ring 2 is encircled by more than two annular arcs; an inner diameter of the annular cover 4 is matched with an outer diameter of the inner ring 1; and the outer diameter of the annular cover 4 is matched with the inner diameter of the outer ring 2. The height of the annular cover is confirmed according to the height of the to-be-manufactured mould.

Description

technical field [0001] The invention relates to a mold for making ring shear test samples. Background technique [0002] In recent years, the ring shear test has become the main method for the study of soil strength under large deformation conditions. Many countries have also carried out long-term and in-depth research on the development and application of the ring shear instrument to increase the accuracy of the experimental results. Purpose. However, the preparation of specimens for ring shear tests has not been thoroughly explored. The preparation of the samples still adopts the traditional preparation method. The traditional sample preparation method is mainly: first use the compaction method or consolidation method to prepare the required remodeling soil sample, then use a thin-walled ring knife to cut off the upper and lower excess parts, and use a small-sized ring knife to remove The middle part makes it form a hollow sample. [0003] Traditional test means and me...

Claims

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Application Information

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IPC IPC(8): G01N1/36
CPCG01N1/36G01N2001/366
Inventor 杨爱武陈立杰胡垚袁鹏会
Owner TIANJIN CHENGJIAN UNIV
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