Device and method for preparing undisturbed soil sample of ring cutter

Abstract

The invention relates to a device and a method for preparing an undisturbed soil sample of a ring cutter. The device comprises a work table, a support column, a soil sample lower backing plate, a force transmission frame, a pressing head, a lever, a spring clip and other common tools for preparing the soil sample, wherein the preparation materials can be steel, aluminum, alloys and the like. By utilizing the device and the method, the original sample of the ring cutter is prepared under a condition that a sample box is not completely opened, so that an opportunity that the soil sample is damaged in the preparation process of the sample is effectively reduced; for soil samples of loess, cracked clays and the like which are easily cracked, the ring cutter sample with high quality can be prepared, and the sample manufacturing success ratio is high and the scrap ratio is low; and for sand soil with low cohesive force, the original sand soil sample can be sampled by a common soil taking device so as to further prepare the undisturbed soil sample of the ring cutter.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering investigation, in particular to a device and a method for preparing ring knife undisturbed soil samples. Background technique [0002] At present, undisturbed soil samples are taken at the drilling site for engineering survey soil engineering tests. After the undisturbed soil samples are sent to the laboratory, the sample box must first be opened, and then the undisturbed soil samples are prepared with ring cutters according to the test requirements for physical or mechanical property tests of the soil. There are following disadvantages in the method of this preparation ring cutter undisturbed soil sample: [0003] 1. For new loess with low structural strength and vertical cracks, after opening the sample box, the soil sample will crack vertically, causing the sample to be damaged and scrapped; The soil sample sticks to the wall of the sample box. After the box is opened, the sample is eas...

AI Technical Summary

Problems solved by technology

[0003] 1. For new loess with low structural strength and vertical cracks, after opening the sample box, the soil sample will crack vertically, causing the sample to be damaged and scrapped; The soil sample sticks to the wall of the sample box. After opening the box, the sample is easy to crack and be scrapped, and multiple sampling will cause a large economic expenditure.

[0004] 2. For the sand with little cohesion, the sand is easy to disperse after the sample box is opened, so at present, the ring knife can only be embedded in the sand collector, and the ring knife sample can be taken directly on site

[0005] 3. When preparing the ring knife sample, manpower is required to press the ring knife into the soil sample. For hard soil samples, the resistance of pressing the ring knife into the soil is relatively large, and it is laborious to prepare the ring knife sample.

[0006] Through searching, no published patent documents related to this patent application have been found

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