Soil sampler directly used for undisturbed-sample dynamic characteristic test

Abstract

The invention relates to a soil sampler directly used for an undisturbed-sample dynamic characteristic test. The problems that an I-grade sand-soil undisturbed sample collected by an existing soil sampler is difficult during processing and preparing in a laboratory, and is prone to disturbing the undisturbed structure of a sand-soil sample are effectively solved. An outer upper cylinder and an outer lower cylinder are rotationally installed; sliding grooves are formed in the two sides of the outer lower cylinder, a spring in the lower portion of the outer upper cylinder is pressed at the top of an inner cylinder body in the outer lower cylinder, side lugs are arranged at the top of the inner cylinder body, flexible pipe holes are formed in the portions, below the side lugs, on the two sides of the inner cylinder body, and the inner cylinder body is rotationally installed on a waste soil pipe; the waste soil pipe is connected with a soil sampling pipe, and the soil sampling pipe is connected with the upper end of a pipe boot. The soil sampler is simple in structure and convenient to assemble and disassemble, and is one of ideal tools for collecting the I-grade sand-soil undisturbed sample for the soil dynamic characteristic test in drilling.

Description

technical field [0001] The invention relates to the technical field of soil fetching devices, in particular to a soil fetching device directly used for testing the dynamic characteristics of undisturbed soil samples. Background technique [0002] The dynamic characteristic test of soil is the main method to obtain the dynamic strength, dynamic deformation and dynamic pore pressure characteristics, vibration liquefaction characteristics and dynamic stress-dynamic strain relationship of soil, which is of great significance to the seismic design and research of buildings and structures. Indoor soil dynamic characteristic tests mainly include dynamic triaxial test, resonance column test, etc. The soil sample is generally cylindrical, with a diameter of 50 mm, 39.1 mm, etc., and the height of the sample is 2-2.5 times the diameter. For the preparation of undisturbed soil samples, the quality grade of soil samples is required to be level of the original sample. As far as the dy...

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Problems solved by technology

[0005] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a kind of earth taking device directly used in the dynamic characteristic test of the undisturbed soil sample, which can effectively solve the problem of the undisturbed sandy soil I level sample collected by the existing earth taking device in the experiment. Difficulties in indoor processing and preparation and easy to disturb the original structure of sand samples

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