Device and method for testing frost heaving parameter of soil under standard compaction work

Abstract

The invention discloses a device and method for testing a frost heaving parameter of soil under standard compaction work. The device includes a steel base plate; a separable iron tube is arranged on the steel base plate, a soil sample is in the separable iron tube, and an organic glass tube is arranged on the periphery of the separable iron tube; the separable iron tube, the steel base plate, the organic glass cylinder and a lantern ring are fastened through a fastening device; a water temperature sensor is arranged in the soil sample, and a water temperature data collector is connected with on the outside; a displacement sensor is arranged above the soil sample, and of a displacement data collector is connected on the outside; the two data collectors are connected to a main control computer; and the inner wall of the organic glass tube is coiled with a copper pipe, and the organic glass tube is connected to a cycle refrigeration apparatus through a plastic hose. The device can test frost heaving ratio, moisture migration, temperature transfer of the soil sample under standard compaction work and various conditions, and can quickly remove the frozen soil sample, and observe the soil surface and dissected internal freezing texture, so as to obtain the change rule of frost heaving ratio, and rule of moisture migration and heat transfer.

Description

technical field [0001] The invention belongs to the technical field of soil property detection in cold regions, and in particular relates to a test device and a test method for soil frost heaving parameters under standard compaction work, and to study the mechanism of subgrade frost heaving and slurrying and prevention measures. Background technique [0002] The mechanism of frost heaving in road engineering in cold regions is that the migration and accumulation of water in the subgrade soil and the freezing of water cause the water in the soil to redistribute, and form several layers of frozen layers parallel to the frozen interface. There are still ice lenses or ice in some areas. block, squeeze the soil, and the volume increases to cause embankment uplift; and the mechanism of mud pumping is that the surface ice layer melts earlier due to the rise in temperature in spring, and when the lower layer is not yet thawed, the water in the melted layer cannot dissipate downward, ...

AI Technical Summary

Problems solved by technology

In order to solve the problem of frost heaving and slurrying, many professionals try to use various test methods to study the mechanism of frost heaving, including field tests and indoor tests. In view of the long period and high cost of field tests, generally do not use

The indoor test only studies the mechanism of frost heave from the perspective of frost heave measurement, which has great limitations.

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