Environmental geotechnical piezocone penetration test probe capable of extracting gas samples and gas sample extracting method

Abstract

The invention relates to an environmental geotechnical piezocone penetration test probe capable of extracting gas samples and a gas sample extracting method. A sealing cover (15) is arranged at the top of the probe, and a cable (1) penetrates out from the sealing cover; the upper half section of the probe is a hollow cylindrical probe rod (3), and a pore pressure sensor (2), a small-sized hose pump (4) and a sampling container (5) are arranged in the probe rod in the upper half section; a probe rod (7) with a polypropylene porous filter screen is disposed on the middle section of the probe, and an upper O-shaped ring (6) is connected with the probe rod with the polypropylene porous filter screen and the hollow cylindrical probe rod (3); and a copper threaded opening connector (8) at the lower portion of the probe is connected with the middle probe rod, a three-component seismic detector (9) is disposed under the copper threaded opening connector (8), and a gradiograph (10), a side wall friction barrel (11), a temperature sensor (12), a pore pressure filtering ring (13) and a conical probe (14) are arranged under the three-component seismic detector (9). The probe has the advantages that the probe can be located at an original position, is fast, accurate and economical and the like, and is a powerful sampling tool for an environmental geotechnical engineering CPTU (piezocone penetration test).

Description

technical field [0001] The invention relates to an environmental rock-soil pore pressure static sounding probe capable of taking gas samples, belonging to a static sounding device capable of collecting underground gas samples in soil layers in the fields of geotechnical engineering and environmental engineering. Background technique [0002] Static CPT technology refers to using a pressure device to press a penetrating rod with a probe into the test soil layer, and through the measurement system to test the cone tip resistance and side wall friction resistance of the soil, some basic physical properties of the soil can be determined. Mechanical properties, such as the deformation modulus of the soil, the allowable bearing capacity of the soil, etc. The static penetration technology has a history of more than 80 years. Static CPT is widely used in the world, partially or completely replacing drilling and sampling in engineering investigation. In 1965, our country first succ...

AI Technical Summary

Problems solved by technology

The research on the new static sounding sampling device started relatively late in China, and the static sounding of single and double bridges widely used in China does not have the function of sampling at all, so it is very meaningful to develop sampling technology in environmental geotechnical engineering

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