Piezocone penetration test probe for probing underground magnetic field intensity

Abstract

The invention discloses a piezocone penetration test probe for probing underground magnetic field intensity. The probe transmits signals and data by the aid of a coaxial cable (1), an analog-digital converter (2), a pre-amplifier (3), a sampling resistor (4), a three-dimensional magnetic field measuring element (5), a three-component seismic detector (6) and a clinometer (7) are arranged on the upper portion of the probe, the three-dimensional magnetic field measuring element (5) is formed by adhering six Hall sensors approximate in performance on the surfaces of a cube, a side wall friction drum (8) is arranged on the lower portion of the probe, a pore water pressure sensor (9) is arranged in the side wall friction drum (8), a conical probe body (11) is connected on the lower portion of the side wall friction drum (8), and a pore pressure filtering ring (10) is positioned between the side wall friction drum (8) and the conical probe body (11). The probe has the advantages of in-situ, directness, rapidity, accuracy, economy and the like, and provides a powerful testing tool for geotechnical engineering practice and underground space exploitation.

Description

technical field [0001] The invention relates to a pore pressure static sounding probe which can be used to detect underground magnetic field strength, and belongs to a static sounding device capable of directly and continuously analyzing and testing the distribution of underground magnetic field strength in the field of geotechnical 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...

AI Technical Summary

Problems solved by technology

Hard structures such as concrete piles and steel piles will damage the static penetration probe; damage to structures such as high-voltage lines, energy lines, and pipelines will cause hidden dangers to social safety and economic losses

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