A kind of screw-type bulldozing sample device and bulldozing sample method

Abstract

The invention discloses a screw-type bulldozer sample device and its bulldozer sample method, comprising a bottom plate, a middle plate, a top plate, a sampling cylinder, and a top cover, wherein both sides of the bottom plate, the middle plate, and the top plate are coaxially connected and fixed by support columns, A sleeve is added on the upper part of the top cover to ensure that when the runner rotates the screw propulsion rod, the top cover is evenly stressed and acts as a guide for the top cover; an ear plate is set on the outer wall of the sampling cylinder, and the groove is used to facilitate the sampling cylinder The installation and centering of the sampling cylinder can ensure the balance of the sampling cylinder during the soil sampling process; a tray with a spring is added to the bottom plate, and the support of the tray and the buffering effect of the spring can prevent the soil sample from falling suddenly, resulting in deformation and damage of the soil sample . The anti-slip structure is provided on the runner to prevent the rotating runner from slipping and to facilitate uniform force application. The invention improves the efficiency of soil extraction and ensures the quality of soil samples.

Description

technical field [0001] The invention relates to the field of civil engineering, which belongs to a geotechnical test tool, in particular to a screw-type bulldozer sample device and a bulldozer sample method. Background technique [0002] One of the main tasks of engineering geological drilling is to take core or undisturbed soil samples in the rock and soil layer. During the process of taking samples, the natural structure of the sample should be maintained. If the natural structure of the sample is damaged, it is called "disturbance". Sample". Disturbed samples are not allowed in engineering geological exploration, unless it is clearly stated that they are used otherwise, the disturbed samples are invalid. Undisturbed samples of natural structures include core samples and soil samples. The natural structure of core samples is generally not easily damaged, but soil samples are easily disturbed. Therefore, the bulldozing effect of the bulldozing device is often directly re...

AI Technical Summary

Problems solved by technology

[0003] Although the sampling cylinder of the existing soil-taking device is centered with a circle of clamping grooves, however, with the increase in the number of tests, the corresponding part of the clamping grooves where the sampling cylinder is placed is easily covered by scattered soil particles. If it is not fully cleaned before the test, Then the sampling cylinder should not be balanced and centered, and the soil sample will be easily eccentric when it is pressurized and stressed, which will cause the soil sample to be easily damaged during the soil sampling process.

In addition, when the soil sample is pushed out of the sampling cylinder, the soil sample is easy to fall suddenly, resulting in incomplete lower surface of the soil sample

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