A test device for measuring frost heave force and frost heave amount of artificially frozen and thawed soil

Abstract

The invention relates to a test device for measuring a frost heaving force and frost heaving capacity of artificial frozen-thawed soil. The device comprises a base plate, a soil sample cavity, a top cover, a support, a soil sample cover plate, a connecting rod, a water replenishing connecting pipe, a freezing liquid cavity, a dynamometer and a counterforce frame, wherein the base plate is provided with a first sealing groove; the soil sample cavity is embedded in the first sealing groove of the base plate and used for storing a soil sample; the top cover is provided with a second sealing groove, and the second sealing groove covers the top of the soil sample cavity; the support is connected between the top cover and the base plate; the soil sample cover plate is arranged in the soil sample cavity; the connecting rod penetrates through the top cover, and the lower end of the connecting rod pushes against the soil sample cover plate; the water replenishing connecting pipe penetrates through the top cover to be connected with the soil sample cover plate; the freezing liquid cavity is arranged in the soil sample cavity, is fixed on the base plate and is used for storing the freezing liquid; the dynamometer is connected to the upper end of the connecting rod; the counterforce frame is connected to the dynamometer. Compared with the prior art, the freezing and thawing process of the soil of various soil textures can be simulated, which provides convenience for researching the frost heaving rule of the soil under a single-direction freezing condition.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a test device for measuring the frost heave force and the frost heave amount of artificial frozen-thawed soil. Background technique [0002] The artificial stratum freezing method is a better stratum reinforcement technology. Since it was used in mine excavation by German engineer F.H.Poetech in 1883, this technology has been widely used in other underground projects. Since the 1990s, the southeastern coastal areas of my country have begun to develop and utilize underground space on a large scale. Due to the wide distribution of soft clay in this area, it has brought great inconvenience to underground construction. It is widely used in underground engineering construction in this area due to its advantages of good water quality and so on. [0003] The artificial stratum freezing method is to arrange a freezing pipe around the pre-reinforced soil, and through the ...

AI Technical Summary

Problems solved by technology

The Chinese patent application number 201220482912.3 discloses a test device for measuring axial force and deformation under freezing and thawing conditions of artificial frozen soil. Transferred to the soil sample, the direction of water migration inside the soil sample is not clear, and the water replenishment during the open system test cannot be realized, so the actual engineering situation cannot be well simulated

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