Saturated soil sample preparation device and use method thereof

A preparation device and soil sample technology, which is applied in the field of saturated soil sample preparation devices, can solve the problems of test result influence, soil sample disturbance, soil sample extrusion deformation, etc., to avoid secondary disturbance and extrusion deformation, simple production, low cost effect

Pending Publication Date: 2018-04-06
ZHENGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A consolidation cylinder is used to prepare soil samples by the slurry consolidation method. After the soil 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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  • Saturated soil sample preparation device and use method thereof
  • Saturated soil sample preparation device and use method thereof

Examples

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Effect test

Embodiment 1

[0023] This embodiment takes the preparation of a saturated remodeled cohesive soil sample with a height of 20 mm as an example. For the preparation device, see figure 1 and figure 2 . It is mainly composed of permeable stone 3, ring knife 6, backing ring 7, loading block 2 and water tank 1; ring knife 6 has an inner diameter of 61.8 mm, a wall thickness of 1.6 mm, and the inclined end faces upward, and is placed on the permeable stone 3 cushioned with filter paper 5 , place ring 7 on ring cutter 6; ring 7 is 10 mm high, ring 7 has an inclined end face corresponding to cutter 6; ring 7 is made of rubber, and ring 9 is built in, ring 7 From bottom to top, the diameter of each wire ring 9 first decreases and then increases. The permeable stone 3 is a circular plate with a thickness of 50 mm and a diameter of 100 mm. The material of water tank 1 and ring knife 6 is stainless steel. The preparation of soil samples mainly includes the following steps:

[0024] 1): Prepare a r...

Embodiment 2

[0032] This example prepares a group of the same soil samples, a total of 3. The difference from Example 1 is that the three soil samples were prepared in the same water tank 1, and the rest of the components of each device were identical. Three identical soil samples were prepared at the same time.

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Abstract

The invention discloses a saturated soil sample preparation device and a use method thereof, and belongs to the field of geotechnical test researches. The device mainly comprises a porous stone, a cutting ring, a spacer, a loading block and a water channel, wherein the inclined end face of the cutting ring is upward, and is placed on the porous stone cushioned with filter paper; the spacer is arranged at the upper end of the cutting ring and has an incline end face corresponding to that of the cutting ring; the spacer is made of rubber, and steel wire rings are arranged in the spacer; diameters of the steel wire rings are firstly reduced and then increased from bottom to top in the spacer; and mixed sludge is poured into the cavity formed by the cutting ring and the spacer, and the lower surface of the porous stone is at least submerged by water in the water channel. The device can be used for easily and quickly preparing a saturated remolded cohesive soil sample in one time.

Description

technical field [0001] The invention relates to the field of geotechnical experiment research, in particular to a saturated 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 experimental research is mainly based on laboratory experiments, and most of them focus on saturated remolded cohesive soil samples. At present, the methods for preparing saturated remolded cohesive soil samples include compaction method and mud consolidation method. Because the soil samples prepar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/286G01N2001/2873
Inventor 魏建东刘忠玉
Owner ZHENGZHOU UNIV
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