Constant-volume and temperature-controllable axial and radial soil body expansibility tester

A technology of axial radial and expansion force, which is applied in the field of geotechnical engineering measuring instrument manufacturing to achieve the effect of saving test time, simplifying test operation steps and convenient operation

Active Publication Date: 2015-07-01
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen from the above that there are certain defects in the traditional soil swelling force test method and test device.

Method used

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  • Constant-volume and temperature-controllable axial and radial soil body expansibility tester
  • Constant-volume and temperature-controllable axial and radial soil body expansibility tester
  • Constant-volume and temperature-controllable axial and radial soil body expansibility tester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] (1) Check that all parts of the instrument are intact and clean them one by one. After cleaning, put an appropriate amount of soil sample in the multi-functional test cylinder, put the ring knife holder on it, apply lubricating oil on the outside of the ring knife, and insert the ring knife vertically into the ring. In the ring in the center of the knife holder, to the bottom, take out the strip of soil;

[0031] (2) Put the radial pressure sensor into the center of the soil sample, that is, the hollow position after the soil sample is taken out of the soil strip in step 1, and place a permeable stone on the top of the soil sample;

[0032] (3) Pass the data cable through the reserved round hole in the center of the end cover, and through the reserved hole of the permeable stone, connect it to the radial pressure sensor, then cover the end cover, and slightly preload the soil by screwing in the bolts , so that the soil sample is in close contact with the permeable stone, ...

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Abstract

The invention relates to a constant-volume and temperature-controllable axial and radial soil body expansibility tester and belongs to the technical field of manufacturing of geotechnical engineering measuring instruments. The device comprises a multifunctional testing barrel, a core taking system, a fixed support, a force measurement assembly, an end cover, a water conveying and discharging system, a heating and drying system and a permeable element, wherein the multifunctional testing barrel is internally provided with a heating coil hole, a permeable stone and an axial pressure sensor; the core taking system comprises an annular cutter fixing frame and an annular cutter; the force measurement assembly comprises an axial pressure sensor and a radial pressure sensor; the end cover is fixedly connected with the testing barrel by a bolt; and the heating and drying system comprises a heating coil, a temperature controller and a drying frame. Compared with the prior art, the constant-volume and temperature-controllable axial and radial soil body expansibility tester has the advantages that the volume of a soil sample keeps unchanged in a testing process and the temperature can be controlled; and meanwhile, the axial and radial expansibility time interval curves of the soil sample can be obtained at the same time, so that the soil sample can be rapidly dried, the dry-wet circulating testing time is saved and the operation is simple.

Description

Technical field: [0001] The invention relates to a constant-volume temperature-controllable axial-radial soil expansion force tester, in particular, the temperature can be controlled during the expansion force test process, and the axial and radial soil expansion force can be measured simultaneously and can be quickly The method obtains the relationship between the dry-wet cycle action and the expansion force of soil, and belongs to the technical field of geotechnical engineering measuring instrument manufacturing. Background technique: [0002] As a widely distributed soil, expansive soil has a very important influence on the expansion properties of transportation, water conservancy, construction and other engineering constructions. As one of the important indicators to evaluate the properties of expansive soil, the expansive force has a very important measurement accuracy. meaning. [0003] Expansion force refers to the force produced by increasing the water content while...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
Inventor 周翠英徐淦开
Owner SUN YAT SEN UNIV
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