Lateral stress pore pressure probe used for testing soil static lateral pressure coefficient

Abstract

The invention discloses a lateral stress pore pressure probe used for testing a soil static lateral pressure coefficient. An analog-digital converter (2) is arranged on the top portion of the upper half section of the probe, a side wall upper friction drum (3.1), an upper pore pressure filtering ring (5.1) and a pair of lateral stress sensors (6) are sequentially arranged on the lower portion of the analog-digital converter (2) from top to bottom, the lateral stress sensors (6) are symmetrically arranged on the outer wall of a feeler lever, and an upper pore space water pressure sensor (4.1) is arranged in the middle of the side wall upper friction drum (3.1). A three-component seismic detector (7), a clinometer (8), a side wall lower friction drum (3.2), a lower pore pressure filtering ring (5.2) and a cone probe (9) are sequentially arranged on the lower half section of the probe from top to bottom, and a lower pore space water pressure sensor (4.2) is arranged on the middle portion of the side wall lower friction drum (3.2). Signal and data transmission is achieved through connection of a coaxial-cable (1) and the analog-digital converter (2) arranged on the top portion of the probe. The lateral stress pore pressure probe has the advantages of being in-situ, rapid, continuous, economical and the like.

Description

technical field [0001] The invention relates to a lateral stress pore pressure static penetrating probe for testing the static lateral pressure coefficient of soil, which belongs to the field of geotechnical engineering and can directly and continuously analyze and test the in-situ static lateral pressure coefficient of the soil layer. Static penetrating device. 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 enginee...

AI Technical Summary

Problems solved by technology

At present, the determination of the static lateral pressure coefficient mainly depends on the flat shovel lateral expansion instrument, lateral pressure instrument or high-quality borehole sampling and laboratory test analysis, while the existing static penetration technology is the most widely used principle in the field of geotechnical engineering. However, it is difficult to effectively determine this parameter by means of site survey

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