Measuring device for crushing of soil particles around pile and measuring method of measuring device

Abstract

The invention provides a measuring device for crushing of soil particles around a pile and a measuring method of the measuring device. The measuring device comprises a test box, a model pile, a jack,and a high-definition camera. The measuring method includes the steps of dyeing soil particle layer arrangement, sampling design and method, and particle image processing; in the test box, the soil particles with different particle colors according to the particle sizes are distributed at the bottom of the pile and the side of the pilein layers; the pile is sunk and the particles are crushed through the jack; reasonable space sampling point locations are designed, and bulk solids or original samples are obtained; and samples are photographed by the high-definition camera, and particle crushinginformation is analyzed through image processing software. According to the measuring device for crushing of the soil particles around the pile, the difficult problem that crushing of the soil particles with the large sizes around the pile is difficult to measure is solved, various working conditions can be simulated, test operation is convenient, crushing of the soil particles with the differentparticle sizes is distinguished, by combining modern image processing technology information, abundant parameters are provided for studying the interaction between the pile and soil, and reference can be provided for crushing of the soil particles around the pile in practical engineering research.

Description

technical field [0001] The invention relates to the technical field of foundation engineering, in particular to a device and method for testing and measuring the crushing of soil particles around piles. Background technique [0002] In civil engineering foundation treatment, pile foundation, as the most commonly used form of deep foundation, is widely used in various engineering constructions because of its advantages of high bearing capacity, small and uniform settlement, and wide application range. However, under the action of vertical load, the pile and the soil particles around the pile interact to jointly bear the load of the superstructure. [0003] In order to investigate the pile-soil interaction law (breakage and displacement of soil particles around piles) of pile foundation in crushed stone, gravel, and various sandy soil foundations, indoor pile foundation model test is one of the most reliable and commonly used methods. Since the soil particles such as rocks, c...

AI Technical Summary

Problems solved by technology

The data obtained from the micromodel test are the results of particle breakage under the direct interaction between the model pile and soil particles. However, the size of the micromodel test is too small, and the scale effect is too large, which may cause the test rule to be inconsistent with the actual project; in addition, using The difference between single-size soil particles and actual mixed-size soil particles under pile-soil interaction is also very obvious

The reason why the traditional method cannot carry out the model test of particle breakage under the interaction between large-scale piles and mixed graded soil particles is that: 1) During the actual filling process around the pile, due to the inhomogeneity of the filling soil, each position around the pile The initial gradation of the soil particles is often different and unknown, so it is impossible to explain the crushing of the particles around the pile; 2) In the soil particles with mixed particle sizes, the large particles are broken into small particles, and the analysis of the crushing amount of small particles is often biased. Low; 3) Even if a single-size soil particle different from the actual gradation is used, the fine particles around the pile will obviously migrate to the bottom of the box after being broken, and the broken soil particles everywhere are mixed together, and the source of the broken particles cannot be identified particle size

In addition, in the traditional particle crushing measurement, it is also difficult to obtain the original sample of soil particle crushing around the pile.

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