The invention discloses an undisturbed soil sampler. The sampler comprises a force applying device and an annular knife. The annular knife comprises an outer cylinder (1), an inner cylinder (2), and a sampling film (3). The lower end of the outer cylinder (1) is provided with an annular knife edge (11), which is downwards arranged. The internal diameter of the annular knife edge (11) is smaller than the internal diameter of the inner cylinder (2). The sampling film (3) is sleeved on the outer wall of the inner cylinder (2), and the lower part of the sampling film (3) is folded to the interior of the inner cylinder (2). The upper end of the inner cylinder (2) is provided with a protuberance (21) that extends outwards. The lower part of the inner cylinder is inserted into the outer cylinder (1), and the protuberance (21) is snapped on the upper opening of the outer cylinder (1). The force applying device acts on the protuberance (21) and the force is transmitted to the outer cylinder (1) through the protuberance (21). The provided undisturbed soil sampler has the advantages that the contact friction between the soil and the annular knife is prominently reduced during the sampling process, the deformation and destruction of soil sample are effectively prevented, moreover, the soil sample is not polluted, the sampler is easy to clean after use, and the load for wild sampling is effectively reduced.

Undisturbed soil sampler

An original sandy soil sampling method comprises the following steps: an applicator, a sampling sleeve and a soil sampling cutting edge are assembled together; sandy soil to be sampled firstly has a soil layer covering the sandy soil cleaned, paraffin is heated and melted to form wax oil, and the wax oil is poured in a to-be-sampled area; after the wax oil is completely solidified, a sandy soil sampling device is pressed into the soil layer until the whole sampling device is full of soil; a soil body around the sandy soil sampling device is cleaned, and an annular hollow groove is formed around the sandy soil sampling device; the sandy soil sampling device is gently shaken, the sandy soil at the bottom end of the sandy soil sampling device is divorced from the soil sampling device, and the sampling device is taken out from the soil body; the applicator is dismantled, the excess soil body at the top end of the sampling sleeve is removed, and an upper sealing port cover is mounted; and the soil sampling cutting edge is dismantled, the excess soil body at the bottom end of the sampling sleeve is removed, and a lower sealing port cover is mounted. The original sandy soil sampling method has the advantages that the disturbance on the sampled sandy soil is small, the sampling sandy soil is not easily caused to be loose, and the original sandy soil is convenient to simple, package, transport and transfer.

Original sandy soil sampling method and sampling device

The invention relates to a sampling device, especially to a sampling device for loose sediments. The sampling device for loose sediments comprises a top cover, a movement mechanism, an upper samplingbarrel, a lower sampling barrel, a sampler and positioning pins, wherein the top cover is mounted on the upper end of the upper sampling barrel; the lower sampling barrel is installed on the lower endof the upper sampling barrel; the sampler is mounted on the lower end of the lower sampling barrel; the movement mechanism sleeves the upper sampling barrel and can slide up and down along the outercylindrical surface of the upper sampling barrel; and the positioning pins are used for fixing the movement mechanism on the upper sampling barrel. The sampling device for loose sediments has the beneficial effects that the sampling device is simple in structure and convenient to operate; the bottom of the sampling device can be tightly closed when the sampling device is being pulled out of the sediments, so loss of a sample of the loose sediments can be effectively prevented and the acquired sample can better maintain the original characteristics; and an initial location line can determine the installation height of the movement mechanism while a termination location line can determine the minimum height to which the movement mechanism needs to move downwards so as to achieve bottom sealing, so descending time for the sampling device can be saved and bottom sealing efficiency can be improved.

Sampling device for loose sediments

The invention discloses a multifunctional sand grain collecting device. The multifunctional sand grain collecting device comprises a scoop, a flow guide pipe, a collecting pipe, a lamp, a battery, a switch, a front cover, a rear cover, a pull ring and a pull rope. Sand grains in soil are collected by the scoop at the front end and collected in the collecting pipe through the flow guide pipe, the quantity of the collected sand grains is acquired via scale in a transparent cell of the collecting pipe, sand grain samples can be acquired quantitatively, the operation is convenient and fast, and convenience is brought to environmental monitoring work in a desert area; the lamp is arranged on the collecting pipe, can be used for illumination in bad weather or at night, and further can be used for light alarm in emergency, thereby having rich functions; the whole sand grain collecting device is convenient to carry by aid of the pull ring and the pull rope which are arranged on the rear cover; the sand grain collecting device is simple in structure, convenient to operate, rich in function and suitable for large-scale production and use.

Multifunctional sand grain collecting device

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.

Undisturbed soil sampling device and sampling method

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Undisturbed soil sampling device and sampling method