Pressure test calibration mechanical loading device for earthwork testing

Abstract

The invention discloses a pressure test calibration mechanical loading device for earthwork testing. A workbench is arranged at the lower part of a portal frame; a joint in suspended connection witha tested pressure measuring element is in threaded connection to the center of an upper beam of the portal frame; the workbench is internally provided with a worm wheel and worm deceleration mechanism; the worm wheel is provided with a vertical lifting toothed bar, the central screw hole of which is in threaded connection with the joint of the upper beam of the portal frame; the vertical lifting toothed bar is in up-and-down correspondence with the joint; the workbench is provided with a driving main shaft which is parallel with the worm, slides axially and is provided with a hand wheel at the outer end per se; the driving main shaft is provided with an accelerating driving gear and a decelerating driving gear; and the accelerating driving gear and the decelerating driving gear are arranged at the optical shaft section of the worm. According to the pressure test calibration mechanical device, a complete counter-force frame is composed by the portal frame and the workbench; as a vertical force pressurization and deceleration force-increasing driving mechanism is arranged in the workbench, a standard force measurement gauge and a tested pressure measuring element both fixed between the joint of the portal frame and the vertical lifting toothed bar can be stressed at the same time; and the calibration purpose is realized by observing and comparing numerical readings of the standard force measurement gauge and the tested pressure measuring element.

Description

technical field [0001] The invention belongs to experimental devices, in particular to a mechanical loading device for geotechnical test pressure test calibration used for test calibration of force-measuring devices of geotechnical test instruments. Background technique [0002] One of the main contents of geotechnical test is to analyze the physical and mechanical properties of foundation soil, conduct tests through different test models and test instruments, and provide a basic specialty of related parameters. [0003] Conventional mechanical tests such as consolidation, compression, shear, lateral pressure coefficient (K0) and triaxial shear all involve applying different levels of axial force to the specimen, and recording the whole process while deforming the specimen. The basis of various relationship curves and data processing results. Therefore, force (stress) and displacement (strain) are indispensable test parameters for mechanical tests of each specimen. Usually,...

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Problems solved by technology

[0010] The above-mentioned utility model has a complex hydraulic system structure and poor stability, and the manual oil injection pump is difficult to accurately control, so it is not suitable for the actual needs of online detection and calibration of the pressure test channel of the geotechnical test instrument.

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