Testing device for promoting soft clay drainage consolidation through ultrasonic waves

Abstract

The invention discloses a testing device for promoting soft clay drainage consolidation through ultrasonic waves. The testing device comprises a soil sample chamber, a pressure system, an ultrasonic transmitting system and a measuring system; the soil sample chamber comprises a base and an organic glass barrel, and the base is provided with a filter layer, a permeable layer, a drainage pipe and adrainage valve, wherein the drainage pipe and the drainage valve communicate with the permeable layer; the pressure system comprises a force applying assembly and a force transferring plate making contact with the top surface of a soil sample, and an exhaust valve is further arranged on the force transferring plate; the ultrasonic transmitting system comprises an ultrasonic generator and a plurality of ultrasonic transducers connected with the ultrasonic generator, and the ultrasonic transducers are evenly distributed on the force transferring plate; the measuring system comprises a pluralityof sound intensity probes, a plurality of hole pressure gauges, an electronic scale and a drainage vessel; and a plurality of holes and mounting frames for mounting the sound intensity probes and thehole pressure gauges are further arranged on the side wall of the organic glass barrel in the height direction, and the electronic scale is used for weighing the amount of water in the drainage vessel. The testing device has the characteristics of convenient use and reliable data.

Description

technical field [0001] The invention relates to a test device for accelerating the drainage and consolidation of soft clay by ultrasonic waves, belonging to the technical field of foundation treatment experimental instruments. Background technique [0002] Saturated soft clay is widely distributed in my country. It is mainly composed of extremely fine-grained clay colloids. The particle diameter reaches the micron level. Tiny soil particles usually have a small pore size and a large specific surface area, and the surface charging phenomenon is very obvious. , under the action of its electric field, a thicker bound water film is formed on the particle surface. The combined water film increases the viscosity of pore water flow, making it difficult to remove pore water. The existence of the bound water film has a great influence on the engineering properties of the soil. Destroying the bound water in the soil can promote the removal of pore water, accelerate the consolidation o...

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Problems solved by technology

[0003] At present, the commonly used methods include applying load to the soil or vacuuming, and electroosmotic drainage and consolidation, etc., but the influence of bound water on the removal of pore water is not considered, and the mechanical action and cavitation of ultrasonic waves can break the bound water film. Hydrogen bonds convert bound water into free water, reduce the viscosity of pore water, and improve permeability

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