A high-speed railway foundation expansive soil expansion potential tester

Abstract

The invention discloses an expansive potential measuring instrument of expansive soil of a high-speed railway foundation. A variable pressure amount control water injection unit, an axial adjustable uniform water seepage lateral confinement restraining unit, a variable load loading unit and a displacement acquisition unit are included. The expansive potential measuring instrument of the expansivesoil of the high-speed railway foundation has the beneficial effects that the beneficial effects that the problem about measurement of the expansive amount and the expansive force of original expansive soil under the multi-factor mutual coupling effect is solved, the permeability measurement problem of the original expansive soil under the upper load effects is also solved, components of the instrument are easy to install, and operation is convenient.

Description

technical field [0001] The invention belongs to a device for measuring the expansion amount and expansion force of roadbed expansive soil, in particular to the measurement of the expansion amount and expansion force of the undisturbed expansive soil under the coupled action of the three factors of water content, thickness and overlying load. Background technique [0002] Expansive soil is a kind of soil with many cracks and significant expansion and contraction. It is widely distributed and has harmful effects on various shallow structures. Expansive soils have been found in as many as 46 countries in the world so far, covering six continents. Compared with other countries, my country's expansive soil and its engineering problems have the following characteristics: First, it is widely distributed. my country is one of the countries with the widest distribution of expansive soil in the world. The distribution area of ​​expansive soil accounts for about 1 / 3 of the total land ...

AI Technical Summary

Problems solved by technology

[0017] The purpose of the present invention is in order to overcome the various problems that exist in the prior art mentioned above, aiming at the present situation and the current situation of no expansive soil under the coupling action of water content, thickness, and overlying load coupling effect of swelling amount and expansion force In view of the status quo of the instrument for measuring the permeability of undisturbed expansive soil under the action of overlying load, a new instrument that can meet the requirements of the undisturbed expansive soil under the coupled action of water content, thickness, and overlying load for the measurement of expansion force and expansion, as well as meet the requirements of the overlying load It is an economical and applicable instrument for measuring the permeability of undisturbed expansive soil under action, with feasible technology, reasonable design

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