Variable gradient simulation device for slope interface instability caused by soft clamping rock argillization under dry-wet alternation effect

Abstract

The invention discloses a variable gradient simulation device for slope interface instability caused by soft rock argillization under dry-wet alternation effect; a rotary slope test box comprises a sealed model box, a box body adopts a sandy soil slope, a soft rock interlayer is paved by special clay, and pH test strips are paved on two sides of the soft rock interlayer; the simulated raining assembly is mounted above the model box, and a spray head is aligned with the model box for spraying; the model box is provided with at least two equipment cavities; the lower half part of the box body is a semicircular area, the leveling assembly is placed in the semicircular area, and the through screw penetrates through the semicircular area and a hole of the leveling assembly and is fixed to the supports on the two sides through bolts; when the angle of the slope test box is adjusted, dry-wet cycle operation is conducted on the slope to simulate the actual environment, and test data and the color development condition of the pH test strip are analyzed. The device and the method have the advantage that the interface instability failure process caused by soft interlayer argillization of soft rock interlayer slopes with different gradients in a dry-wet alternating environment is simulated.

Description

technical field [0001] The invention relates to a civil engineering simulation device, in particular to a variable slope simulation device for instability of a side slope interface caused by mudification of soft interlayered rock under the alternating action of dryness and wetness. Background technique [0002] In Southwest China, especially in Sichuan, Yunnan, Chongqing and other places, there are a large number of slopes containing soft interlayers of mud and shale. During the construction of water conservancy, highway and railway projects, how to maintain the stability of such slopes is an important issue. The shear strength of the drier shale interlayer is higher, which is not the controlling factor for slope instability. However, under the conditions of rainfall infiltration or water level changes, mud shale is not easy to expand when it encounters water for the first time, and has a certain water-proof effect. Mud reaction, the shear strength of the mud shale interla...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a variable slope simulation device for the instability of the slope interface caused by the mudification of soft interlayer rock under the alternating action of dry and wet ,include:

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