Geogrid pull-out test device for simulating flexible top boundary

Abstract

The invention discloses a geogrid pull-out test device for simulating a flexible top boundary. The geogrid pull-out test device comprises a drawing box placed on a bearing platform, a transverse groove is formed in the side wall of the drawing box; the geogrid horizontally extends into the drawing box through the transverse groove and divides the drawing box into an upper cavity and a lower cavity, the upper cavity and the lower cavity are respectively filled with soil, a rotatable rigid loading mechanism with a flat and smooth bottom surface is arranged at the upper end of the soil in the upper cavity, a support frame is constructed on the bearing platform, a pressurizing mechanism is suspended on the support frame, and the output end of the pressurizing mechanism is vertically propped against the upper end of the rigid loading mechanism. According to the invention, the rigid loading mechanism is rotatable; the phenomenon that in the test process of simulating the flexible top boundary through an air bag or a water bag, under the high pressure, the limit pressure bearing value of the air bag or the water bag is exceeded, and pressure explosion occurs is avoided, the process of simulating the change rule of the reinforced soil interface characteristics is more accurate, and the geogrid drawing characteristic of the flexible top boundary is simulated.

Description

technical field [0001] The invention belongs to the technical field of geotechnical synthetic material pull-out test devices, in particular to a geogrid pull-out test device for simulating a flexible top boundary. Background technique [0002] In geogrid pull-out tests, rigid or flexible top boundary conditions are often used to apply vertical loads. For the boundary conditions of the flexible top, the existing pull-out test device is usually based on the vertical load applied by the rigid loading plate, using flexible materials such as air bags or water bags, and placing the air bags or water bags under the rigid loading plate to simulate the flexible top Boundaries, conducted for the pull-out test investigation. However, flexible materials such as airbags or water bags have the disadvantages of low strength and low rigidity, and there are air-filled ports or water inlets on the bottom surface that are not smooth, which affects the variation of the reinforcement-soil inter...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a solution to the disadvantages of low strength and rigidity of flexible materials such as airbags or water bags in the process of geogrid pull-out tests, and the bottom surface of which is left with an air-filled port or water inlet is uneven, which affects the characteristics of the reinforcement-soil interface. Geogrid pull-out test setup for simulating flexible top boundaries with varying laws

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