Overlaid soil sample preparation device and use method thereof

A preparation device and soil sample technology, which is applied in the field of stacked soil sample preparation devices, can solve the problems that the soil sample cannot be in close contact with the inner wall of the ring knife, the influence of test results, and the extrusion deformation of the soil sample, so as to avoid secondary disturbance and Effects of extrusion deformation, low cost and convenient operation

Pending Publication Date: 2018-03-30
ZHENGZHOU UNIV
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  • Abstract
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Problems solved by technology

A consolidation cylinder is used to prepare the sample by the slurry consolidation method. After the sample reaches the required void ratio, the prepared soil sample needs to be pushed out of the consolidation cylinder, which will cause a disturbance to the soil sample; Knife sampling, the soil sample is prone to extrusion deformation; it may also prevent some soil samples from being in close contact with the inner wall of the ring knife
These factors will have a great impact on the test results, and it is urgent to improve the existing devices.

Method used

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  • Overlaid soil sample preparation device and use method thereof
  • Overlaid soil sample preparation device and use method thereof
  • Overlaid soil sample preparation device and use method thereof

Examples

Experimental program
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Embodiment 1

[0032] This embodiment takes the preparation of 4 saturated remodeling cohesive soil ring knife samples with a height of 20 mm as an example, and the preparation device can be found in Figure 1-Figure 4 , consists of a number of basic units, the standard basic unit is composed of supporting ring 13, permeable stone 3, ring knife 6, backing ring 7 from bottom to top, the bottom basic unit has no supporting ring 13, all basic units pass through The support rods 15 are connected in series and placed in the water tank 14, and the water in the water tank 14 submerges the upper surface of the pressure plate 9. There is a support rod fixing groove 2 with internal threads on the base plate 12, and the lower end of the support rod 15 has corresponding external threads, and the support rod 15 and the base plate 12 are threaded. Ring cutter 6 internal diameters are 61.8 millimeters, wall thickness 1.6 millimeters, high 20 millimeters. Backing ring 7 is high 10 millimeters. The thickne...

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Abstract

The invention discloses an overlaid soil sample preparation device and a use method thereof, and belongs to the field of geotechnical experiment research. The device mainly comprises a plurality of overlaid basic units, and each basic unit sequentially comprises a supporting ring, a permeable stone, a cutting ring and a backing ring from bottom to top. All the basic units are connected in series through supporting rods and placed into a water tank, and each basic unit can manufacture one soil sample. The backing rings are made of rubber, and steel wire rings are placed into the backing rings.The diameter of each steel wire ring in the backing rings is firstly decreased and then increased from bottom to top. Water in the water tank submerges the upper surface of a compression plate. A plurality of saturated remodeled cohesive soil cutting ring samples can be prepared once rapidly and efficiently by the device.

Description

technical field [0001] The invention relates to the field of geotechnical experiment research, in particular to a stacked soil sample preparation device and a use method thereof. Background technique [0002] When carrying out foundation engineering construction in saturated clay soil areas, the foundation or subgrade often has a large settlement. In order to study and control the settlement of foundation or subgrade, it is necessary to carry out experimental research on the rheological characteristics and permeability characteristics of subgrade soil or subgrade soil in saturated cohesive soil area. Saturated undisturbed cohesive soil samples are often not easy to obtain, and the experimental research is mainly based on laboratory experiments, and most of them take saturated remolded cohesive soil samples as the research objects. At present, the methods for preparing saturated remolded cohesive soil samples include compaction method and mud consolidation method. Since the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/286
Inventor 魏建东刘忠玉
Owner ZHENGZHOU UNIV
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