Baffle closed soil fetcher

Abstract

The invention provides a baffle closed sampler. A tube boot of the baffle closed soil sampler is connected with a baffle chamber of the baffle closed soil sample through screw threads; a baffle is in hinged connection with the baffle chamber through a soft rubber plate on the baffle; a soil sample chamber comprises a cutting ring, a backing ring and an oppositely-open half-close tube, wherein embedding grooves for the cutting ting and the backing ring are embedded into the inner wall of the oppositely-open half-close tube; external screw threads are formed at the two ends of the oppositely-open half-close tube; the oppositely-open half-close tube is connected with the baffle chamber through external screw threads at one end; a residue tube of a waste soil chamber is connected with the oppositely-open half-close tube through the external screw threads at the other end of the oppositely-open half-close tube; a piston is placed in the residue tube; a piston connecting rod penetrates through a circular hole in the center of the top end of the residue tube and is connected with a lifting head through screw threads; tapered threads are formed in the top end of the lifting head; the lifting head is connected with an outer drilling rod through screw threads. The baffle closed sampler has the beneficial effects that the ultra-soft soil, such as silt and flowing mud, with the water content being over 70 percent can be sampled by using the baffle closed sampler; the difficulty in sampling an ultra-soft soil layer is overcome, and the difficulties in taking and transporting the cutting ring in an ultra-soft soil sample experiment are overcome; secondary disturbance in detaching and cutting an ultra-soft soil sample is reduced.

Description

technical field [0001] The invention is a baffle-closed soil fetcher applied to soft soil and ultra-soft soil layers such as silt and flowing mud. Through this equipment, the collection of soil samples from soft soil and ultra-soft soil layers can be realized, and the requirements of such soils can be satisfied. Some special requirements in layer engineering geological survey. Background technique [0002] In the engineering geological survey of water area engineering projects such as ports, water conservancy, highways, bridges, and artificial islands, the collection of soil samples from soft soil and ultra-soft soil layers is a common problem. At present, open-type thick-walled soil extractors and open-type thin-walled soil extractors are generally used for collecting soil samples in soft soil and ultra-soft soil layers. The open-type thick-wall soil extractor has a small diameter of the soil sample and a small soil footage, so the vacuum siphon effect on the soil sample i...

AI Technical Summary

Problems solved by technology

[0005] The effect of the present invention is to use the baffle plate closed type soil fetcher, realize the closure of the soil fetcher by opening and closing the baffle plate, and can realize the collection of ultra-soft soil layers such as silt and flow mud with a moisture content exceeding 70%, and solve the problem of The problem of difficult collection of ultra-soft soil layers, and the direct collection of soil samples through the ring knife embedded in the soil sample chamber, overcomes the problem of difficulty in cutting and transporting ultra-soft soil samples with the ring knife in laboratory tests, and reduces the number of ultra-soft soil samples. Secondary perturbation in demolition and cutting can meet some special needs in engineering geological investigation of ultra-soft soil layers

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