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Preparation device of saturated remolded clay cutting ring sample and application method thereof

A preparation device and soil ring knife technology, which is applied in the preparation of test samples, measuring devices, sampling, etc., can solve the problems that the soil sample cannot be in close contact with the inner wall of the ring knife, the soil sample is squeezed and deformed, and the test results are affected. Achieve the effects of avoiding secondary disturbance and extrusion deformation, low cost and simple production

Inactive Publication Date: 2018-06-12
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Preparation device of saturated remolded clay cutting ring sample and application method thereof
  • Preparation device of saturated remolded clay cutting ring sample and application method thereof
  • Preparation device of saturated remolded clay cutting ring sample and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

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 6 . The preparation device mainly includes a sample preparation table 1, a sample preparation cylinder 12, a ring knife 6, a water tank 14, and a support rod 15, a lever 16, a weight plate 17, a weight 25, a dowel rod 11, and a pressure plate 9. Load body. The sample preparation cylinder 12 is 240 mm long, with a wall thickness of 8 mm, an inner diameter of 61.8 mm, and an outer diameter of 77.8 mm. 22 sides are provided with groove 19, and rubber strip 20 is arranged in groove 19; There is a backing ring 7 between them; the lower part of the sample preparation cylinder 12 has a drain hole 4; inside the sample preparation cylinder 12 there are permeable stone 3, filter paper 5, mud 8, filter paper 5, permeable stone 3 and pressure plate 9 from bottom to top, The pressure plat...

Embodiment 2

[0041] This embodiment takes the preparation of two saturated remolded cohesive soil ring knife samples with a height of 40 mm as an example. The difference from Embodiment 1 is that the height of the ring cutter 6 is 40 mm, two ring cutters 6 are placed in the ring cutter positioning groove 18, and a corresponding backing ring 7 is placed in the middle.

Embodiment 3

[0043] This embodiment takes the preparation of two saturated remolded clay ring knife samples with a height of 20 mm and one with a height of 40 mm as an example. The difference with embodiment 1 is that two kinds of ring cutters 6 of specifications are adopted, one of which has a height of 20 mm, and the other has a height of 40 mm. Ring cutter 6, and a height is the ring cutter 6 of 40 millimeters, each ring cutter 6 places a corresponding backing ring 7.

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Abstract

The invention discloses a preparation device of a saturated remolded clay cutting ring sample and an application method thereof, which belong to the field of geotechnical test research. The preparation device mainly comprises a sampling cylinder, a cutting ring, a loading mechanism and a water channel. The sampling barrel is a half-and-half cylinder; two cylinder sheets are assembled through a clamp hoop. During a jointing part of the cylinder sheets, a groove is formed in the side face of the cylinder sheet on one side, and a rubber strip is arranged in the groove, so that a joint is ensuredto be impermeable after being jointed. A cutting ring positioning slot is formed in an inner wall of the sampling cylinder and can be used for placing multiple cutting rings; a backing ring is arranged between each two adjacent cutting rings. A drainage hole is formed in the lower part of the sampling cylinder, and is internally and sequentially provided with permeable stones, filter paper, mud, filter paper, permeable stones and a pressurizing plate; the pressurizing plate is provided with a through hole. The sampling cylinder is placed in the water channel, and water covers the sampling cylinder. The loading mechanism utilizes a lever for pressurizing the pressurizing plate. The device can be used for preparing multiple saturated remolded clay cutting ring samples with different sizes atone time, and is fast and high-efficient.

Description

technical field [0001] The invention relates to the field of geotechnical experiment research, in particular to a device for preparing saturated remolded cohesive soil ring knife samples and a method for using the same. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/28G01N2001/2873
Inventor 刘忠玉夏洋洋张家超郑占垒朱新牧魏建东
Owner ZHENGZHOU UNIV
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