Visual clogging simulation system of gravel pile drainage structure and simulation method thereof

Abstract

The invention belongs to the technical field of foundation treatment liquefaction resistance, and provides a visual clogging simulation system of a gravel pile drainage structure and a simulation method thereof.The visual clogging simulation system mainly comprises a gradation simulation device, the gradation simulation device comprises a device frame body and a model groove, the upper end of the model groove is open, and a plurality of containing cavities are formed in the model groove; one end of the model groove is provided with a water inlet, and the other end is provided with a water seepage port; the vertical stress loading device comprises an air bag and an air compressor, and the air bag is arranged at an opening in the upper end of the model groove; the seepage pressure loading device comprises a middle liquid storage tank, the output end of the middle liquid storage tank is communicated with the water inlet, and the input end of the middle liquid storage tank is respectively communicated with a water supply source and the air compressor. The invention further discloses a visual clogging simulation method. The method can be used for evaluating the reverse filtration effect of gradation of the gravel material and the change of the permeability coefficient in the long-term service process, and provides more accurate test reference data for the design of the drainage and liquefaction resistance effect of the gravel pile.

Description

technical field [0001] The invention belongs to the technical field of anti-liquefaction of ground treatment, and in particular relates to a visual silting simulation system and a simulation method of a gravel pile drainage structure. Background technique [0002] At present, gravel piles are often used for drainage and anti-liquefaction foundation treatment. Through the drainage channel formed after pile formation on sandy soil foundation, the excess pore pressure generated by the foundation under dynamic action can be quickly dissipated, and the main factor affecting the drainage and anti-liquefaction effect of gravel piles is It depends on the gravel gradation and permeability coefficient of the gravel pile, but because the permeability coefficient of the gravel pile is larger than that of the surrounding soil, when excess pore pressure occurs in the soil, it is easy to form radial seepage pressure. Therefore, in the gradation design process of gravel pile materials, the ...

AI Technical Summary

Problems solved by technology

[0003]In the traditional technology, the grading of crushed stones is generally based on the conventional filter design principles, but in the actual use process, the crushed stones in the actual formation Whether it is easy to clog due to osmotic pressure in the environment has not yet been determined, and the general indoor penetration test cannot verify whether the gradation of the gravel filter material is continuously effective under the action of osmotic pressure and confining pressure. The value of stone gradation and permeability coefficient is inaccurate, which affects the design of drainage and anti-liquefaction effects of gravel piles

Images