Device for sealing triaxial test sample of soil body and method for using device

Abstract

The invention discloses a device for sealing a triaxial test sample of a soil body and a method for using the device. A sealer consists of two semi-annular composite materials of which openings face each other, wherein one end of the sealer is provided with a tenon tongue, and the other end of the sealer is provided with a mortise; and grooves are reserved on a base and a loading device and used for placing an O-shaped sealing ring. When the device for sealing the triaxial test sample of the soil body is used, the O-shaped sealing ring is placed in the reserved groove of the base; after the O-shaped sealing ring is flattened and covers a rubber film of the base, a lower sealer is doweled on the rubber film and fixed on the base by a fixing screw; the sample moves to a test platform; and an upper sealer and the loading device are fixed together. In a test process, sealing is formed by extrusion between the sealer and the base or the loading device and a system internal pressure. The invention has the advantages of simple structure, easiness in implementation, simplicity and convenience for operation and low cost. By the invention, air leakage in the test can be effectively prevented. The method is a high-efficiency and practical method capable of preventing the air leakage of the sample in the triaxial test.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering tests, in particular to a soil triaxial test sample sealing device and a use method. Background technique [0002] As early as 1933, the German Seffert used a triaxial instrument to study the consolidation of soil at the Prussian Waterway Test Station, the purpose of which was to reduce the side wall friction of the sample. And our country began to study the triaxial instrument in the 1950s. In 1953, the former Nanjing Hydraulic Instrument Factory, which is now the Nanjing Electric Power Automation Equipment Factory, first manufactured a triaxial instrument that applied axial force with a pound scale. The development of my country's triaxial instrument has gone through the process from imitation to self-design and manufacture. At present, large, medium and small triaxial instrument series products can be mass-produced, and advanced computer technology is used to automatically col...

AI Technical Summary

Problems solved by technology

However, since the rubber membrane is flexible, wrinkles often occur when the rubber band is tied, resulting in air leakage during the test, especially in the case of a large confining pressure, the air leakage phenomenon is more obvious, which seriously affects the test results

At the same time, the requirements for the test personnel are relatively high, and it is not easy to complete it by one person, which greatly wastes manpower and energy. More importantly, the test results are not guaranteed enough.

Therefore, maintaining good sealing and convenient operability during the test is very important for the triaxial test, but no scholars have proposed a better solution to this problem.

Images