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Preparation device of saturated remolded cohesive soil sample and use method thereof

A preparation device and a technology for cohesive soil, which are applied in the field of preparation device for saturated remodeled cohesive soil samples, can solve the problems such as the inability of the soil sample to be in close contact with the inner wall of the ring knife, the influence of the test results, the extrusion deformation of the soil sample, and the like. Avoid disturbance and extrusion deformation, speed up preparation, low cost effect

Inactive Publication Date: 2018-03-20
魏雨町
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Preparation device of saturated remolded cohesive soil sample and use method thereof
  • Preparation device of saturated remolded cohesive soil sample and use method thereof
  • Preparation device of saturated remolded cohesive soil sample and use method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] 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-Figure 4 . The preparation device is mainly composed of a water-permeable plate 3, a ring knife 6, a collar 7, a pressure piston 9, a loading block 2 and a water tank 1; the ring knife 6 is in half, and the joint on one side of the assembly is connected by a pin 15: each The ring blade 10 is welded with a connecting handle 14 and has a pin hole 17 at the end; the seam on the other side of the assembly is connected by a bolt assembly composed of a bolt 11 and a nut 12: each ring blade 10 is welded with an ear plate 13, and the ear plate Bolt hole 16 is arranged on 13. The inclined end of the ring knife 6 faces upwards, and is placed on the permeable plate 3 cushioned with filter paper 5; the collar 7 is placed on the ring knife 6, and the collar 7 has an inclined end surface corresponding to the ring knife 6;...

Embodiment 2

[0035] This example prepares a group of the same soil samples, a total of 3, and the height of the soil samples is 40 mm. The difference from Example 1 is that the height of the ring knife 6 is 40 mm, and the three soil samples are prepared in the same water tank 1, and the rest of the components of each device are identical, and the preparation steps are the same. Three identical soil samples can be prepared at the same time.

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Abstract

The invention discloses a preparation device of a saturated remolded cohesive soil sample and a use method thereof, belonging to the field of geotechnical test research. The device mainly comprises awater-permeable board, a cutting ring, a lantern ring, a sample pressing piston, a loading block and a water tank, wherein the cutting ring is placed on the water-permeable board cushioned with filterpaper in a half-and-half manner, and an inclined end surface of the cutting ring faces upwards; the lantern ring is placed above the cutting ring and is provided with an inclined end surface corresponding to the cutting ring; and the inner diameter of the lantern ring is equal to that of the cutting ring, blended slurry is poured into a cavity formed by the cutting ring and the lantern ring, andwater in the water tank inundates the upper end surface of the lantern ring. According to the preparation device, one saturated remolded cohesive soil sample can be prepared once, so that the disturbance of a soil sample is avoided; and the operation is simple, and the preparation of the soil sample is accelerated.

Description

technical field [0001] The invention relates to the field of geotechnical experiment research, in particular to a device for preparing saturated remolded clay soil 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 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/286
Inventor 魏建东魏雨町
Owner 魏雨町