Testing device for preparing saturated soil sample and sample preparation method thereof

Abstract

The invention discloses a testing device for preparing a saturated soil sample and a sample preparation method thereof. The testing device comprises a vacuum cover with a spherical structure, whereinthe vacuum cover comprises an upper vacuum cover and a lower vacuum cover; the upper vacuum cover and the lower vacuum cover are respectively connected with an air exhauster through exhaust pipes; a saturation device for placing a soil sample for testing is arranged between the upper vacuum cover and the lower vacuum cover; the saturation device is connected with the upper vacuum cover and the lower vacuum cover through bolts respectively; the lower end of the vacuum cover is also connected with a water cylinder through a water guide pipe; the lower vacuum cover is connected with a bracket forsupporting the testing device; the bracket is of a circular-platform-shaped structure. By adopting testing device disclosed by the invention, the efficiency of preparing the saturated soil sample canbe improved and signal is obvious when the soil sample is saturated; the soil sample can reach the optimal saturation effect.

Description

technical field [0001] The invention belongs to the technical field of soil samples and sample preparation in geotechnical tests, and in particular relates to a test device for preparing saturated soil samples and a sample preparation method thereof. Background technique [0002] In soil engineering tests, we often need to prepare saturated soil samples to determine its related physical indicators. According to the relevant regulations for soil samples and sample preparation in Chapter 4 of "Highway Soil Test Regulations" (JTG E40—2007), the nature of the soil determines its saturation method. For sandy soil, it can be directly soaked and saturated in the instrument; for easier For permeable cohesive soils, it is more convenient to use the capillary saturation method or the soaking saturation method; while for the cohesive soils that are not easily permeable, the vacuum saturation method is usually used. The currently used instrument and equipment is to place the saturator ...

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a test device for preparing a saturated soil sample and a sample preparation method for the deficiencies in the above-mentioned prior art, so as to overcome the long time of vacuuming the soil sample in the prior art and achieve In the saturated state, the characteristics are not obvious, it takes a long time to reach the saturated state, and repeated adjustments are required.

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