Simple device for quickly preparing rock soil samples different in water content

Abstract

The invention relates to an indoor rock soil sample preparation device, in particular to a simple device for quickly preparing rock soil samples different in water content, and belongs to the technical field of rock soil engineering. The simple device is composed of a ventilation pipeline, a ventilation pump, a wet air bottle, a water replenishing pipe, a water replenishing pump, a water replenishing valve, a wet air flow speed control valve, a dry air flow speed control valve, a sample utensil, a hygrometer and an electronic scale. By using the simple device, the problems that pre-prepared rock soil samples different in water content in current indoor experiments are nonuniform in water content inside and outside and soil samples prone to disintegrating are difficult to prepare are solved. The simple device is reasonable and simple in structure, easy to manufacture, simple to operate and high in practicability and can be widely used for quick preparation of the rock soil samples different in water content.

Description

technical field [0001] The invention relates to an indoor rock and soil sample preparation device, in particular to a simple device capable of rapidly preparing rock and soil samples with different water contents, and belongs to the technical field of rock and soil engineering. Background technique [0002] In geotechnical engineering, the strength of the rock and soil mass under dry conditions or natural conditions meets the construction requirements, but when the construction conditions change, such as heavy rain, inrush water, etc., the strength of the rock and soil mass decreases under the condition of water content, and uneven large deformation occurs at the same time , It is very easy to induce landslides, surrounding rock or surrounding soil instability, and bring many problems to geotechnical engineering construction such as foundation treatment, foundation pit excavation, tunnel construction, and slope reinforcement. Therefore, there are potential safety hazards in ...

AI Technical Summary

Problems solved by technology

The above two preparation methods are relatively simple, and the preparation time is relatively short. However, since the rock and soil samples have certain geometric shapes and sizes, the water will change dynamically according to the principle of heat conduction during the process of drying water loss or soaking water seepage. Yes, due to the limitation of geometric shape, the distribution of water content in rock and soil samples is not uniform. For rock and soil samples that are wet and dry inside, the degree of unevenness varies with the degree of compactness of the rock and soil materials. For dense rock samples, the degree of inhomogeneity is more obvious, and the anisotropy inside the sample is more prominent. The mechanical test Local stress concentration is easy to occur during the process, and the dispersion of mechanical test results is particularly obvious; in addition, if the soil sample is easily disintegrated when exposed to water, the preparation process cannot contact liquid water, which is not suitable for existing preparation methods and equipment

[0004] To sum up, the current preparation of rock and soil samples with different water contents has problems such as uneven water content inside and outside, and the inability to prepare easily disintegrated soil samples. A simple device that can quickly prepare rock and soil samples with different water contents is developed. Rock and soil samples with uniform external water content can provide important technical support for accurately revealing the coupling between water and rock and soil

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