Test model for seepage characteristics and stability of coverage layer side slope with consideration about rainfall infiltration

Abstract

The invention discloses an apparatus used for analyzing the seepage characteristics, deformation characteristics and stability of a coverage layer-bedrock side slope and a test method of the apparatus. The model is composed of four parts: 1) a bedrock simulative apparatus including four main parts: an upper soil baffle, an upper bedrock plate, a lower bedrock plate and a lower soil baffle, and three rotary shafts for connection, wherein the upper and the lower bed rock plates and the upper and the lower soil baffles are connected to each other through the rotary shafts; 2) a support apparatus, wherein two punched organic glass boards are arranged on two ends of a steel groove, and the three rotary shafts in the first part are inserted into the holes in the two organic glass boards for supporting the upper and the lower soil baffles and the upper and the lower bed rock plates; 3) a rainfall simulative apparatus, wherein a water feeding pipe, on which a nozzle is disposed, is fixed onto the bedrock simulative apparatus by means of a steel pipe, and a water pump supplies water to the water feeding pipe; and 4) a measuring apparatus, wherein a water content meter, a pore pressure meter and a tension meter are arranged inside the side slope, and a displacement meter is arranged on the surface of the side slope, so that seepage and displacement status of the side slope are monitored and simulated.

Description

technical field [0001] The invention relates to an indoor test model of overburden slopes that can simulate different bedrock angles and different bedrock friction coefficients, in particular to a kind of cover layer slope field on both sides of the road for slope seepage characteristics analysis, deformation analysis And a test device for stability analysis. Background technique [0002] The overburden slope refers to a soil-rock mixed slope covered with multiple layers of soil on the bedrock. Under different geological conditions, the angle of the bedrock, the properties of the bedrock, the stratification characteristics of the overburden layer, and the thickness of the overburden layer vary. different. [0003] At present, geological disasters such as slope instability and collapse have become problems that cannot be ignored in the fields of roads, railways, and housing construction. Various accidents caused by slope sliding, especially the sliding of the overlying soil ...

AI Technical Summary

Problems solved by technology

The uniform soil slope model means that the slope soil is completely filled into the model box, and then the slope is made. The single-angle slope model means that the test model can only adopt one angle and cannot be bent into other angles. Experimental means bring limitations

[0005] The disadvantage of the existing indoor slope test model is that, firstly, the above two methods can only simulate a slope with a single angle, but in actual engineering, the angle of the bedrock will change in various ways, and the bedrock is not a straight line, but in the There are certain angles in different positions

Secondly, these two test methods cannot simulate the interface where the soil layer intersects with the rock layer. In fact, the interaction between the soil-rock interface will have a great impact on the stability of the slope.

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