Piston type sampler

Abstract

The invention relates to a piston type sampler for a geotechnical engineering triaxial test soil sample. The piston type sampler mainly comprises a piston and a piston cylinder, wherein the piston is sleeved with the piston cylinder; the main body of the piston is a hollow cylindrical three-section casing; the upper part of the piston cylinder is a cylinder; the bottom of the piston cylinder is a base; a solid cylinder is erected in the center of the base of the piston cylinder; the three-section casing is formed in the way that three axial strip-shaped openings are formed in the cylindrical casing at equal intervals to equivalently divide the casing into three sections; the inner diameter of the cylinder at the upper part of the piston cylinder is slightly larger than the outer diameter of the piston; the piston is slidably inserted into the piston cylinder; a piston cover is arranged at the top end of the piston cylinder; three mutually spaced arc-shaped hollowed parts are formed at the top of the piston cover; the three arc-shaped hollowed parts are matched with the three sections of the piston three-section casing in size. The piston type sampler provided by the invention ensures that during the whole process of taking out the soil sample, the top part and the bottom part of the soil sample are not influenced by external force, external thrust is uniformly exerted on a saturator, an integral supporting and protecting system is provided for the taking-out process of the saturator, and the soil sample cannot be broken by external force to be incomplete.

Description

technical field [0001] The invention relates to a device for taking out soil samples for triaxial tests in geotechnical engineering, which is suitable for taking out soil samples for indoor triaxial tests of clay, expansive soil and other soils. Background technique [0002] At present, the research and application of constitutive models in many geotechnical engineering has gradually matured. Safely taking out the configured soil samples is an important step for the success of the test. Usually, people directly use the saturator and resin gasket to push the soil sample out of the saturator. In the process of taking soil samples, the pushing force should be uniform, and the resin gasket should completely cover the bottom of the soil sample and require Does not affect the removal of the saturator piece. During this process, honeycomb pockmarks or damage will appear in the soil samples that have been arranged carelessly, especially before the saturator is completely taken out...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the incompleteness and damage caused by the existing method of taking out soil samples, the present invention provides a piston sampler, which can not only avoid the unevenness caused in the process of taking out the saturator, but also solve the problem of the last 2-3 cm The problem of soil damage

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