Manual device for measuring maximum dry density in relative density tests

Abstract

The invention discloses a manual device for measuring the maximum dry density in relative density tests. The manual device comprises a metal container barrel, a hammer, a hammer seat, a protective cylinder, a base, a handle and a handrail, wherein the hammer seat is placed above a test soil sample in the metal container barrel, the hammer is located right above the hammer seat, the metal container barrel is mounted on the base detachably, two ends of the protective cylinder are opening metal cylinders, the bottom of the protective cylinder is fixed at the top of the metal container barrel, the handrail comprises two handrail rods and a handrail rod connecting piece, two through holes are symmetrically formed in the hammer along the axial direction of the hammer, lower ends of the two handrail rods are fixed on the hammer seat, upper ends of the two handrail rods penetrate through the two through holes, upper ends of the two handrail rods are connected through the handrail rod connecting pieces, the handle comprises a handle connecting rod and a handle body, the lower end of the handle connecting rod is fixed on the top surface of the hammer, the upper end is fixedly connected with the handle body, and two pedals are symmetrically arranged on the base. The manual device is simple in structure and well adaptable to relative density tests in laboratories or on spot.

Description

Technical field [0001] The invention relates to the technical field of indoor geotechnical test devices, in particular to a manual device suitable for measuring the maximum dry density in a relative density test. Background technique [0002] The relative density test is an important geotechnical test. Through the relative density test, we can obtain the maximum dry density of the tested soil sample in a dry state, so as to provide specific soil sample physical parameters for engineering practice. In the process of measuring the maximum dry density by the relative density test, although there are already electric test equipment on the market, compared with manual devices, electric equipment is bulky, difficult to carry, and requires electricity to provide power. It is used in field engineering geological surveys. It is difficult to use in the process, so manual devices are irreplaceable. According to the "Soil Test Regulations" (SL237-1999), the existing manual device suitable f...

AI Technical Summary

Problems solved by technology

It was a great waste of manpower for three testers to carry out a physical property test at the same time, and because the inner diameters of the drop hammer and the metal container barrel were not much different, the drop hammer often hit the top edge of the metal container barrel during the fall process, not only did not hit The force of the hammer acts on the test soil sample and can damage the metal container barrel and hammer in the long run

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