Indoor model test soil borrowing device based on micro-structure analysis and soil borrowing method

Abstract

The invention discloses an indoor model test soil borrowing device based on micro-structure analysis and a soil borrowing method. The test device comprises a soil borrowing device, a model box and a counter-force bracket, wherein the soil borrowing device comprises a pipe boot, a soil borrowing pipe, a piston, a connection cap, a duplex fitting, a rubber hose, an electric air pump, an electric push rod and a bolt; the counter-force bracket comprises a bottom board, two telescopic supporting rods, a top beam, four pulleys and two slide ways; a test soil sample is placed in the model box; and the model box is placed in the center of the bottom board. The soil borrowing method based on the test device comprises the following steps of: positioning, penetrating, lifting a sample, removing the sample, cutting a disturbed sample and the like. Through the steps, the aim of borrowing soil at different positions and in different depths of a soil mass in the model box is fulfilled, and the sampling requirement on the micro-structure analysis is better met. The test device and the soil borrowing method can be applied to model tests of soft plastic, plastic and hard plastic clay, and rock soil of silty clay and floury soil. The test device has the advantages of high sampling rate and low disturbance, and is easy to operate; and by adoption of the test device, soil can be flexibly borrowed.

Description

technical field [0001] The patent of the present invention relates to a test device and a method for taking soil from different positions and depths of soil in a model box based on an indoor model test. Background technique [0002] Geotechnical model test is an important means for people to understand the macroscopic behavior of soil and the interaction between soil and structure. Due to the large scale of actual geotechnical engineering problems, geotechnical model tests usually use scaled models. The so-called microstructure of soil generally refers to the size, shape, surface characteristics and quantitative proportional relationship of the microstructure units, as well as the spatial arrangement and interaction form of the units. The various physical and mechanical properties of soil are closely related to the composition of the microstructure. To understand the macroscopic properties of soil, we must first have a deep understanding of the microstructure of soil. In th...

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Problems solved by technology

Considering that the samples used for quantitative analysis of microstructure should minimize the disturbance caused by unreasonable structure, so the structural design and soil extraction method of this type of soil extraction device cannot meet the requirements of the miniaturization of the indoor model test site and the location of the soil extraction. Refinement requirements

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