Soil frost-heaving and thawing-settlement tester based on thermoelectric refrigeration control

Abstract

The invention is a soil frost-heaving and thawing-settlement tester based on thermoelectric refrigeration control, which comprises a tester main body, a acquisition control device, a water supplement device, a loading device, wherein the water supplement device is connected with a bottom water supplement groove body of the tester main body; the acquisition control device is connected correspondingly with a A temperature sensor which is responsible for the monitoring of sample temperature gradient change in the tester main body, a displacement sensor, and a hydrostatic sensor; the acquisition control device is connected with a B temperature sensor in a semiconductor refrigerating body; the loading device is disposed in a pressure chamber in the tester main body. The advantages are that: according to the test water content, the test is supplemented with water and drained automatically from the lower part, the water supplement amount is calculated accurately; the hole pressure in the draining process is monitored. Continuous stepless loading is realized; the frost heaving force testing is realized after stepless continuous automatic loading and locking volume, and the simulation truth degree for natural conditions in laboratory frost-heaving and thawing-settlement test is improved, and the test efficiency is improved and the test labor intensity is reduced.

Description

technical field [0001] The invention relates to a soil frost heave and thaw settlement tester based on thermoelectric refrigeration control, in particular to the adjustment of the frost heave and thaw settlement temperature and the automatic monitoring and loading of stress, so as to realize the frost heave force, frost heave and thaw settlement with or without load, Integration of moisture migration test and other functions. Background technique [0002] At present, the external temperature adjustment of the frost heaving and thawing test of the frost heaving and thawing test mostly adopts space environment box refrigeration or multi-channel water bath circulation for temperature control. Ambient refrigeration belongs to the three-dimensional freeze-thaw method, which does not conform to the one-dimensional freeze-thaw method. The temperature adjustment module of the frost heave and thaw settlement tester controlled by the water bath cycle temperature is mostly designed in ...

AI Technical Summary

Problems solved by technology

In terms of loading control and force testing, currently the frost heaving and thawing test (with or without load conditions) and the measurement of frost heaving force are carried out separately, and the loading is generally weight loading, which cannot realize automatic continuous loading; thawing and drainage The problem is that the drainage design of thaw settlement (with or without lotus plants) adopts the reverse process of water replenishment, which not only considers the real-time monitoring of drainage, but also considers the tracking and monitoring of changes in pore water pressure during the drainage process

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