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Preservation method of undisturbed soil sample of red clay

A technology of undisturbed soil samples and red clay, which is applied in the direction of sampling, test sample preparation, instruments, etc., can solve the problems of unclear sealing method, long-term effective storage, and rapid dehydration of soil samples, etc., to reduce soil Sample dehydration, avoid ambient temperature rise, good anti-vibration effect

Active Publication Date: 2019-03-01
广东中煤江南工程勘测设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 3. There are no clear and specific regulations on the methods of protecting undisturbed soil samples such as sealing, preventing humidity changes, strictly preventing exposure to the sun, freezing, and avoiding vibration
[0009] For the original soil samples of red clay, the existing protection methods for undisturbed soil samples do not fully consider the environmental factors such as temperature and humidity and the differences in the environment before the soil samples were taken, nor do they take advantage of the high water content and low permeability characteristics of red clay itself. , put forward a specific method for maintaining the humidity of the soil sample, which will cause the soil sample to lose water too quickly. above), until cracking and failure, the effective protection time is about 3 days, which cannot meet the needs of long-term effective preservation in areas with inconvenient transportation and remote areas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The following steps were taken to protect the undisturbed soil samples of red clay (including preservation and transportation):

[0030] (1) the undisturbed soil sample of red clay taken by the standard is wrapped with the flow-plastic state red clay mud close to the soft plastic state with a thickness of 3mm;

[0031] (2) Put the undisturbed soil sample after coating in the sampling cylinder, cover the cylinder cover, wipe the surface, seal it with tape, mark the upper and lower layers, and affix the sampling label;

[0032] (3) Embed the sealed sampling cylinder in a 1.5m deep soil pit in the shade, and water the surface of the soil pit after filling the soil, and the amount of watering is limited to the soil moistness and compaction;

[0033] (4) Make a wooden box with a breathable specification of 30cm×40cm×50cm, and place a foam board with a thickness of 5cm at the bottom of the wooden box;

[0034] (5) On the 15th day after sampling, the sampling cylinder in the ...

Embodiment 2

[0038] The following steps were taken to protect the undisturbed soil samples of red clay (including preservation and transportation):

[0039] (1) the undisturbed soil sample of red clay taken by the standard is wrapped with the flow plastic state red clay mud close to the soft plastic state with a thickness of 2mm;

[0040] (2) Put the undisturbed soil sample after coating in the sampling cylinder, cover the cylinder cover, wipe the surface, seal it with tape, mark the upper and lower layers, and affix the sampling label;

[0041] (3) Bury the sealed sampling cylinder in an earth pit with a depth of 1.8m in a cool place, and water the surface of the earth pit after filling the soil, and the amount of watering is limited to the soil moistness and compaction;

[0042] (4) Make a wooden box with a breathable specification of 30cm×40cm×50cm, and place a foam board with a thickness of 4cm at the bottom of the wooden box;

[0043] (5) On the 13th day after sampling, the sampling ...

Embodiment 3

[0047] The following steps were taken to protect the undisturbed soil samples of red clay (including storage and transportation):

[0048] (1) the undisturbed soil sample of red clay taken by the standard is wrapped with the flow plastic state red clay mud close to soft plastic state with thickness of 4mm;

[0049] (2) Put the undisturbed soil sample after coating in the sampling cylinder, cover the cylinder cover, wipe the surface, seal it with tape, mark the upper and lower layers, and affix the sampling label;

[0050] (3) Bury the sealed sampling cylinder in an earth pit with a depth of 1.6m in a cool place, and water the surface of the earth pit after filling the soil, and the amount of watering is limited to the soil moistness and compaction;

[0051] (4) Make a wooden box with a breathable specification of 30cm x 40cm x 50cm, and place a foam board with a thickness of 6cm at the bottom of the wooden box;

[0052] (5) On the 14th day after sampling, the sampling cylinde...

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Abstract

The invention discloses a protection method of a red clay undisturbed sample. The protection method comprises the following steps: coating the adopted red clay undisturbed sample by using flow plastic red clay mud; putting the undisturbed sample coated with the mud in sampling barrels, and sealing by using an adhesive tape; burying the sealed sampling barrels into a pit at a shade place, and watering the surface; manufacturing a soil sample box capable of ventilating, and putting an anti-vibration plate at the bottom of the soil sample box; taking out the sampling barrels in the pit and putting the sampling barrels in the soil sample box, and preserving gaps between the sampling barrels; filling the gaps with soaked crops densely, covering with a box top plate, and bundling firmly; and transporting to a laboratory. The red clay undisturbed sample is stored and transported by using the protection method disclosed by the invention, so that the red clay undisturbed sample is long in storage life, simple and convenient in operation, low in cost, good in anti-vibration effect and easy to transport, and the effective protection time is up to 20 days ormore than 20 days.

Description

technical field [0001] The invention relates to a method for protecting undisturbed soil samples, in particular to a method for protecting undisturbed red clay samples with long effective protection time. Background technique [0002] The protection requirements and effective protection time for undisturbed soil samples in existing codes and manuals are: [0003] 1. Soil samples I, II, and III should be properly sealed to prevent humidity changes, exposure to the sun or freezing; vibration should be avoided during transportation, and the storage time should not exceed three weeks. [0004] 2. For soil samples that are prone to vibration liquefaction or water separation analysis, it is advisable to conduct tests nearby. [0005] 3. There are no clear and specific regulations on the methods of protecting undisturbed soil samples such as sealing, preventing humidity changes, strictly preventing exposure to the sun, freezing, and avoiding vibration. [0006] Based on the above...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N1/36
CPCG01N1/28G01N1/36G01N2001/005
Inventor 谢春庆
Owner 广东中煤江南工程勘测设计有限公司