Soil layer top pressurizing device

Abstract

The invention discloses a soil layer top pressurizing device which comprises a test box and a to-be-tested model (3), a containing cavity (10) for containing a soil layer (101) is formed in the test box, and the to-be-tested model (3) is partially or completely buried in the soil layer (101); the device is characterized in that a mounting plate (102) is arranged at the top of the test box; the soil layer top pressurizing device further comprises a plurality of pressing plates (4) arranged on the surface of the soil layer (101) in a matrix shape and a plurality of mutually independent first driving devices (5) fixed relative to the mounting plate (102), and the first driving devices (5) correspond to the pressing plates (4) one to one, can drive the corresponding pressing plates (4) to moveup and down and are used for applying different pressures to the soil layers (101) at different positions. Compared with the prior art, the soil layer top pressurizing device can accurately simulatethe non-uniform stress state of the tops of civil engineering structures and infrastructures caused by different terrains and different stress environments.

Description

technical field [0001] The invention relates to the technical field of cross-fault civil engineering structure and facility experiment devices, in particular to a pressure device at the top of a soil layer for simulating embedding environments with different pressures. Background technique [0002] With the needs of human social and economic development, the construction of large-scale civil engineering, transportation, water conservancy and ocean engineering has become more and more common, and the seismic geological safety of engineering structures has attracted more and more attention. Among them, the safety of civil engineering structures and infrastructure under the action of earthquake faults is particularly prominent. The survey shows that when large-scale projects such as tunnels, bridges, railways, pipelines, and buildings pass through or cross active fault zones, the fault movement will cause tension, extrusion, or shearing of the engineering structure, which will ...

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Problems solved by technology

[0003] At present, the research on the safety of large-scale civil engineering, transportation, water conservancy and marine engineering under the action of earthquake faults is not enough, especially the experimental research on engineering structures and facilities that pass through and cross earthquake faults is far from enough

In the prior art, taking the tunnel as an example, the simulation experiment platform used in the model test method under the action of an earthquake fault can only simulate the influence of the shear action of the fault dislocation on the tunnel, but for the tunnel in the real environment, Terrain or human dynamic activities will exert different pressures on different positions of the soil layer where the tunnel is buried. Therefore, the stress state on the top of the tunnel is non-uniform, and the current experimental platform ignores this aspect of the test

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