Undisturbed soil column sampler for salt marsh wetlands

Abstract

The invention provides an undisturbed soil column sampler for salt marsh wetlands. The undisturbed soil column sampler comprises a storage tube, a lifting rod, a reciprocating plug, a rubber plug, a steel ring and a fixing device. The reciprocating plug is arranged inside the storage tube and is fixedly connected with the front end of the lifting rod, the rubber plug is arranged at an orifice in the upper end of the storage tube, a hole is formed in the middle of the rubber plug, the lifting rod can move in the hole in the up-down directions, and an air hole is further formed in the rubber plug; the fixing device is arranged above the rubber plug on the lifting rod; the steel ring is further arranged on the outer wall of the upper end of the storage tube, two half rings are fixed by the aid of screws to form the steel ring, and handles are symmetrically arranged on the outer side of the steel ring; a sampling opening is formed in the lower end of the storage tube, and an annular cutteror a sample cover is arranged at the sampling opening. The undisturbed soil column sampler has the advantages that samples can be taken out by the aid of vacuum states formed between the reciprocating plug and the samples, and the sampling depths and the sampling diameters of the undisturbed soil column sampler are larger than the sampling depths and the sampling diameters of existing samplers; sedimentary compaction in sampling procedures can be reduced, accordingly, the samples are good in authenticity and integrity and high in cleanliness, and the geology can be truly reflected.

Description

technical field [0001] The invention relates to the technical field of salt marsh wetland geological survey and research, in particular to an undisturbed soil column sampler for salt marsh wetland. Background technique [0002] The depth of 0-100cm of sediment is an important stratum for the evolution and development of salt marsh wetlands, and soil sampling of salt marsh wetlands at this depth is very necessary. Salt marsh wetlands are often covered by reeds and other typical salt marsh wetland vegetation, and the vegetation density is high. Reed roots form a solid fibrous root layer near the soil surface, and it is difficult for existing samplers to penetrate this layer. The salt marsh wetland is relatively soft, and the existing samplers are prone to distortion of the sample depth. In addition, the soil samples in the existing sampler are obtained later by cutting the sampler with a cutter and taking out the sample. The blade of the cutter is very easy to contact with th...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of undisturbed soil column sampler for salt marsh wetlands, aiming at the shallow sampling depth and small sampling diameter of the existing soil sampler, the sampling depth can reach 120cm, and the sample diameter can reach 10cm, especially suitable for sampling at a depth of 0-100cm in salt marshes

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