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Undisturbed soil column sampler

A technology of undisturbed soil column and sampler, which is applied in the direction of earth square drilling, wellbore/well parts, etc., can solve the problems of unsuitable forest soil field sampling, unconsidered forest soil with many roots and gravels, etc., and achieves improved sampling The success rate, simple and effective structure, and the effect of improving sampling efficiency

Inactive Publication Date: 2016-04-06
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the sampling tools for undisturbed root soil columns are invented based on farmland and grassland, without considering the characteristics of many roots and gravel in forest soil, and are not suitable for field sampling of forest soil

Method used

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  • Undisturbed soil column sampler
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  • Undisturbed soil column sampler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] like figure 1 As shown, the undisturbed soil column sampler is composed of a drill bit 1, a drill barrel 2, and a handle 7. On the whole, the drill bit 1, the drill barrel 2, and the handle 7 adopt an integrated structure; the drill barrel 2 is a stainless steel round tube that is not sealed up and down. The outer wall is polished; the handle 7 is vertically welded to the upper end of the drill barrel in a "one" shape. Specifically, the drill pipe 2 is built with an inner liner 4 and a stopper 5, and the inner liner 4 is placed between the drill bit 1 and the stopper 5. The outer diameter of the inner liner 4 is equal to the inner diameter of the drill barrel 2; The diameter is equal to the inner diameter of the drill barrel 2; there is a vent hole 8 in the middle of the stopper 5. The plugged air hole allows gas to be discharged in compact soil, making the soil entry smooth; in loose or sandy soil, when the drill pipe is lifted out, the small hole is blocked, so that ...

Embodiment 2

[0027] The operating steps of using the undisturbed soil column sampler provided by the invention are as follows:

[0028] ① The experimenter lifts the undisturbed soil column sampler, puts it into the inner liner 4, and plugs the stopper 5 to fix the inner liner 4;

[0029] ② Align the sampling point, keep the drill barrel 2 vertical, hold the handle 7 with both hands, and rotate while pressing down, so that the drill bit 1 and the drill barrel 2 are pushed into the soil;

[0030] ③ Determine the sampling depth through the sampling depth mark on the outer wall of the drill barrel 2 and the observation window 3 during the sampling process, and stop pressing down when the specified sampling depth is reached;

[0031] ④ Reversely rotate the drill barrel 2 several times, and slowly put out the sampler at the same time: when sampling in compact soil, the air hole 8 on the party plug 5 can be kept unobstructed; in loose or sandy soil, when the sampler is raised, Use the plugging p...

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Abstract

The invention discloses an undisturbed soil column sampler which is composed of a drill bit, a drill cylinder and a handle. The drill cylinder is internally provided with an inner lining pipe and a block plug, the inner lining pipe is arranged between the drill bit and the block plug, and the outer diameter of the inner lining pipe is equal to the inner diameter of the drill cylinder; the diameter of the block plug is equal to the inner diameter of the drill cylinder; the center of the block plug is provided with an air hole. Compared with the prior art, the undisturbed soil column sampler is wide in applicability and particularly suitable for collecting undisturbed root system soil column samples in a forest with multiple gravels and root systems except for farmland and grass soil to which an ordinary sampler is applicable; the undisturbed soil column sampler is simple in operation, concise and effective in structure, convenient to carry and firm and durable.

Description

technical field [0001] The invention belongs to the field of underground ecology of terrestrial ecosystems, and relates to a device for preparing undisturbed soil samples for geotechnical tests in soil mechanics, in particular to an undisturbed soil column sampler. Background technique [0002] The exploration and development of ecology for more than one hundred years have mainly focused on the above-ground part, and little is known about the underground part. The root system and soil, as the main body of the underground part, have been lagging behind for a long time due to the constraints of sampling difficulties and methods. Therefore, inventing or improving root system and soil sampling tools and methods is an important technical content in the study of underground ecological processes. [0003] At present, the root sampling methods in the field mainly include: manual excavation method, water gun erosion method, sampling tank method and root drilling method. The manual e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/06
CPCE21B49/06
Inventor 鲁旭阳霍常富赵晓敏
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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