A kind of inner core spiral cutter of soft clay hollow cylindrical sample and its application method

Abstract

The invention discloses an inner core spiral cutter for a soft clay hollow cylinder sample and a using method thereof. The inner core spiral cutter comprises a support module, a sample clamping and fixing component and a cutting component. The sample clamping and fixing component is arranged in the support module, and the cutting component is arranged in the sample clamping and fixing component. The axes of the support module, the sample clamping and fixing component and the cutting component coincide. A cutting ring of the cutting component can move vertically in the sample clamping and fixing component. According to the cutter and the using method thereof, the top and the bottom of the soft clay hollow cylinder sample are aligned precisely, and linearity of the cutting inner wall is ensured; an operator can finish the cutting process only by rotating a handle, the operation is simple, and cutting uniformity is ensured.

Description

technical field [0001] The invention relates to sample preparation technology in the field of geotechnical engineering, in particular to a soft clay hollow circle [0002] Column specimen core helical cutter and method of use thereof. Background technique [0003] With the deepening of research on wave load, traffic load and earthquake load, the mechanical properties of soil under complex stress conditions are becoming more and more important. The study of the mechanical properties of the soil element under the complex stress path of the hollow cylindrical sample provides a prerequisite for understanding the basic behavior of the soil under complex stress conditions including the rotation of the principal stress axis. The quality of the hollow cylindrical sample directly affects the accuracy of the test results, so the production of the standard hollow cylindrical sample plays a decisive role in the success of the research. [0004] The remodeling sample can reflect the st...

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Problems solved by technology

[0005] The device provided by the above patents can complete the cutting of the sample at one time, but it has the following disadvantages when cutting the sample: (1) The two ends of the drill pipe are not fixed, and it is easy to tilt during cutting, so that the top of the hollow cylindrical sample It is different from the wall thickness of the bottom; (2) During the cutting process, the drill pipe must be rotated while rising, the degree of cutting is difficult to grasp and the operation is too cumbersome and complicated; (3) When the hollow sample has been obtained, the role of the blade is not enough Large, the cutting mainly depends on the ring cutter, which makes the device too complicated; (4) Although the Chinese patent 201420667584.3 has used two fixed drill pipes, but because the entire inner wall of the hollow cylinder needs to be cut, the length of the drill pipe is too long and the operation is not easy. convenient

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