Onboard three-factor static penetrometer for centrifuge

Abstract

The invention discloses an onboard three-factor static penetrometer for a centrifuge. Slides and a horizontal transmission screw are arranged on the base in the length direction, the horizontal transmission screw is connected with a horizontal displacement motor, a centrifuge body platform is disposed on the slides and the horizontal transmission screw, a horizontal displacement distance measurer and a vertical displacement distance measurer are mounted on the centrifuge body platform, vertical posts and a vertical displacement transmission screw are arranged on the centrifuge body platform, an ejector plate is mounted at the upper ends of the vertical posts, two vertical posts and a beam form a screw pair and are mounted on the centrifuge body platform, a probe bar clamping plate is mounted between each two vertical posts on opposite corners, one end of a probe bar is mounted on the beam and connected with a probe, a motor and a transmission shaft for vertical displacement are mounted on the ejector plate, a pulley on one side of the motor is connected with a pulley fixed on the transmission shaft through a transmission belt, and two ends of the transmission shaft are connected with two vertical displacement transmission screws through a worm gear pair. The onboard three-factor static penetrometer is used for measuring tip resistance, side wall friction and pore water pressure of model soil for the centrifuge.

Description

technical field [0001] The invention relates to a geotechnical engineering static penetrating sounding instrument, in particular to a three-element static penetrating sounding instrument mounted on a centrifuge. Background technique [0002] In recent years, static penetration testing has attracted the attention of many geotechnical workers. Its principle is to use mechanical static pressure to penetrate the probe with the sensor into the formation through the hollow probe rod at a specified rate, and the information detected by the sensor passes through the hollow probe rod. At present, the results of static penetration testing have been widely used in geotechnical engineering, which mainly includes four aspects: correcting the resistance of the cone tip, so that the resistance of the cone tip truly reflects the properties of the soil; evaluating seepage, solid To meet different needs; improve the reliability of soil stratification and soil quality classification. [0003]...

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Problems solved by technology

[0003] However, the above results are all from the in-situ static penetration test, and the in-situ static penetration test has many uncertainties, the use of its data is greatly limited, and in many cases can only be used for preliminary estimation

In addition, the in-situ static penetration testing equipment is large in size and inconvenient to transport. When the depth to be penetrated is deep or the soil layer is hard, the reaction force that the equipment can provide is small

In addition, due to site conditions, it is difficult to implement static penetration testing in some areas

For reasons such as the above, the data of the static penetration sounder, which is limited if not used, is very limited, thus limiting the development of static penetration sounding technology in geotechnical engineering to a large extent.

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