Test device for fracture evolution law of pre-disintegrated carbonaceous mudstone under dry-wet cycle condition

Abstract

The invention discloses a test device for a fracture evolution law of a pre-disintegrated carbonaceous mudstone under a dry-wet cycle condition. The device comprises a drying system and a humidification system. The humidification system is composed of a triaxial apparatus saturator, a vacuum saturation cylinder, a water bucket and a top plate, wherein a bottom plate is provided with the vacuum saturation cylinder and the triaxial apparatus saturator is placed on the middle thereof, and the water bucket and an oil pump are arranged at both sides of the vacuum saturation cylinder respectively. The drying system is composed of an electronic scale, bulbs, a fan, a vent hole, a top plate and a separator. The electronic scale is arranged on a bottom plate, a soil sample is placed on the electronic scale, the electric fan is arranged on a box wall of the system, a digital camera is arranged at the middle of the top plate, and the top plate is symmetrically provided with two bulbs and a vent pipe. The test device for the fracture evolution law of the pre-disintegrated carbonaceous mudstone under the dry-wet cycle condition has the advantages that the degree of automation is high, drying and humidifying are relatively uniform, the operation of instruments is simple and the efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of test devices, and relates to a test device for the evolution rule of pre-disintegrated carbonaceous mudstone cracks under dry-wet cycle conditions. The invention is mainly used for studying the evolution law of cracks of pre-disintegrated carbonaceous mudstone under dry-wet cycle conditions. Background technique [0002] In the humid and hot areas of southern my country, due to the rapid evaporation of water after large-scale rainfall, the moisture content of the soil is constantly changing, which also causes the continuous change of the groundwater level of the road embankment, and the subgrade soil will produce cracks under the action of the dry-wet cycle. And destabilizing and destroying. [0003] At present, in the dry-wet cycle test, the soil is usually humidified by soaking method, and the drying is usually used by high-temperature drying method. Using this method for dry-wet cycle will easily lead ...

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Problems solved by technology

[0004] The existing test device for cracks under dry-wet cycle conditions will not only cause damage to the soil sample during the test process, but also cannot quantitatively weigh the sample and control the change of its moisture content. This test device aims at the above-mentioned devices. The characteristics are improved, the soil sample is saturated by the vacuum saturation method, and the soil sample is quantitatively weighed by an electronic scale to control its moisture content

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