Undisturbed soil sampling device and sampling method

Abstract

The invention discloses an undistributed soil sampling device and a sampling method, belonging to the technical field of geotechnical investigation and providing an undistributed soil sampling device and an undistributed soil sampling method which have little disturbance to undistributed soil, do not easily cause loosening of sampled soil, and are convenient for sampling, packaging and subsequent transportation and transfer of the undistributed soil. The undistributed soil sampling device comprises a sampling tube body having two open ends, and a force applicator, wherein the force applicator comprises a lantern ring and a force transfer handle; a clamping ring bulge is arranged on the outer peripheral wall of the top of the sampling tube body and is lower than the top end surface of the sampling tube body; the lantern ring is detachably sheathed on the sampling tube body above the clamping ring bulge. The device disclosed by the invention is simple in structure; the sampling tube body can be completely pressed under the surface of the soil, such that the undistributed soil can be completely full of the whole sampling tube body to effectively avoid the situation of soil loosening; the device is also convenient for manual application of force to reduce the disturbance to the undistributed soil in a force application process and improve the sampling success ratio of the undistributed soil.

Description

technical field [0001] The invention belongs to the technical field of geotechnical exploration engineering, and in particular relates to an undisturbed soil sampling device and a sampling method. Background technique [0002] With the acceleration of large-scale project construction in construction, municipal, transportation and other industries, the level of survey and design has been developed rapidly, and the requirements for taking soil samples have also increased. At present, for sampling soil, it is often required to keep it in its original state. However, soil is a variety of sediments produced by complex natural environments such as rock weathering, denudation, transportation, and deposition. It is a three-phase system composed of solid matter, water, and gas. The soil structure is relatively loose. During operation, sample packaging, storage, and transportation, it is easy to disturb and destroy its original structural system, resulting in difficulty in sampling th...

AI Technical Summary

Problems solved by technology

This kind of sampling device and sampling method mainly have the following deficiencies: first, adopting the hammering method is prone to inclination and offset of the sampling cylinder, and in the hammering process, it is very easy to cause soil vibration and destroy the original structural system of the soil. Resulting in the failure of sampling the original soil; second, pulling out the sampling cylinder directly will easily cause the soil in the sampling cylinder to be lower than the height of the sampling cylinder, so there will be a certain space in the sampling cylinder, which will cause the sampling cylinder to be damaged during subsequent transportation and transfer. The soil inside is completely loose, which leads to the failure of sampling the undisturbed soil; thirdly, because the hammering operation is directly used, the sampling cylinder often cannot be completely knocked below the surface of the soil, resulting in a certain space left in the upper end of the sampling cylinder, which is also It will cause loosening of the soil in the later stage; fourth, the existing soil sampling device is not equipped with a cover matching the sampling cylinder, which will cause inconvenience in the process of packaging, storing and transporting the sample, and easily cause the undisturbed soil to loosen Case

[0004] In summary, the existing undisturbed soil sampling devices have certain technical defects. During the sampling operation, sample packaging, transportation and transfer process, the undisturbed soil sampled is greatly disturbed and damaged, and the operation process is relatively complicated. , the sampling success rate is low

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