A kind of drill bit of shallow soil fetcher and its soil fetching method

Abstract

The invention provides a shallow soil sampler drill bit and a soil-sampling method thereof. The shallow soil sampler drill bit comprises a drill rod joint, an exhausting part, a drill bit body and a soil-separating ring, wherein the drill rod joint is connected with a drill rod and a power device; the exhausting part is located at a joint of the drill bit body and the drill rod joint, namely, on a drilling shoulder position; the exhausting part has a function of exhausting air in the drill bit in a soil-drilling process while preventing external air from entering into the drill bit; the soil-separating ring is located at a tip of the drill bit. When the shallow soil sampler drill bit is used for sampling soil in a shallow layer, the shallow soil sampler drill bit has the advantages of high applicability, high efficiency, high core-sampling rate, small disturbance on soil sample and capability of effectively solving the problem of difficulty in sampling soft soil.

Description

technical field [0001] The present application relates to a drill bit of a shallow soil fetcher and a soil fetching method thereof in the technical field of geotechnical engineering investigation. Background technique [0002] With the rapid development of my country's social economy and the acceleration of infrastructure construction, more and more shallow soil investigations are being carried out in geotechnical engineering investigations, especially for test requirements, investigations for shallow solidification projects, etc. Mechanical drilling rigs are due to Its cost of use is high, and in shallow drilling, the efficiency is low, and the coring rate is not high, especially in soft ground. In order to be able to carry out convenient shallow soil extraction work, there are various steam-driven and electric soil-moving soil drills and soil extractors appearing on the market. Difficult to guarantee a higher coring rate. On September 28-29, 2016, our test personnel used ...

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Problems solved by technology

In order to be able to carry out convenient shallow soil extraction work, there are various steam-driven and electric soil-moving soil drills and soil extractors appearing on the market. Difficult to guarantee a high coring rate

On September 28-29, 2016, our test personnel used the electric power soil drill and soil extractor on the market to carry out soil extraction for the soft soil site where shallow vacuum drainage was planned. The original plan was to extract 2m of soil, and the site passed multiple points Soil collection, the surface 0.5m soil can be taken out, but the soil deeper than 0.5m depth is not taken out

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