A micro-scale pore pressure static penetrating probe for effectively identifying extremely thin soil layers

Abstract

The invention discloses a micro-scale pore pressure static sounding probe for effectively identifying an extra-thin soil layer. According to the micro-scale pore pressure static sounding probe for effectively identifying the extra-thin soil layer, a stainless steel guide pipe (1) is arranged to be a base body, a friction sleeve (2) is arranged on the lower half portion of the outer side of the stainless steel guide pipe (1), the stainless steel guide pipe (1) is connected and sealed with the friction sleeve (2) through an organic silicone seal ring (3), a strainometer (4) is arranged on the lower portion of the inner surface of the stainless steel guide pipe (1), the strainometer (4) and an external circuit are connected to form a Wheatstone bridge through wires (5), a pore water pressure sensor (6) is arranged below the strainometer (4), a pore pressure filtering ring (7) is arranged below the friction sleeve (2), and a taper probe (8) is arranged below the pore pressure filtering ring (7). The micro-scale pore pressure static sounding probe for effectively identifying the extra-thin soil layer has the advantages of being capable of keeping the original position, fast and convenient to use, high in distinguishability and the like, and is an effective detection tool for the identification and evaluation of extra-thin soil layer in geological survey and geotechnical engineering and the measurement of bearing capacity of sandy soil after liquefaction.

Description

technical field [0001] The invention relates to a micro-scale pore pressure static penetrating probe, which belongs to the field of civil engineering and geotechnical engineering, which can identify and evaluate the extremely thin soil layer under the ground and the bearing capacity of sandy soil after liquefaction in situ, quickly and accurately. Determination of the static penetrating device. Background technique [0002] Static penetration technology refers to the use of a pressure device to press a penetration rod with a probe into the test soil layer, and to test the cone tip resistance and side wall friction resistance of the soil through the measurement system, so as to identify and determine the soil layer. Some basic physical and mechanical properties of the soil, such as the allowable bearing capacity of the soil, the weight of the soil, etc. Static penetration technology has a history of more than 80 years and has been widely used in the world. In 1965, my countr...

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Problems solved by technology

[0004] Technical problem: The technical problem to be solved by the present invention is to propose a method for static penetration detection identification and evaluation of extremely thin soil layers (soil layer thickness ≤ 15mm) and in-situ measurement of sand bearing capacity after liquefaction in China. It can be used in the fields of civil engineering and geotechnical engineering to identify and evaluate extremely thin soil layers in situ and to measure the bearing capacity of sandy soil after liquefaction.

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