Model testing device for foundation under action of dynamic pressure bearing water

Abstract

The invention discloses a model testing device for a foundation under the action of dynamic pressure bearing water. The model testing device comprises a model box, an overhead pressing bearing layer, a pressure bearing water pressure adjusting system, a sensor fixing device and a measurement system. The overhead pressing bearing layer is arranged at the bottom of the model box, and the overhead pressing bearing layer is connected with the pressure bearing water pressure adjusting system. The pressure bearing water pressure adjusting system is composed of a mini-type water pressure transformer, an organic glass cylinder device and a flow meter. The organic glass cylinder device communicates with the flow meter, and the height changes of a water column in the organic glass cylinder device is accurately adjusted through the flow meter so that the dynamic changes of the pressure bearing water in the model box can be achieved. The model testing device can simulate the dynamic change process of the pressure bearing water; the water-earth pressure and deformation degree of the foundation under the action of the dynamic water pressure bearing water are measured, and the stress and deformation development rules of the foundation are determined; and the influence of the change amplitude and change rate of the dynamic pressure bearing water on the stability of the foundation is explored, and the effective test data support is provided for research on the foundation problems caused by the action of the dynamic pressure bearing water.

Description

technical field [0001] The invention relates to a foundation model test device, in particular to a foundation model test device under the action of dynamic confined water, which can be used to simulate the interaction between the pressure-bearing layer and the overlying impermeable foundation soil under the action of dynamic confined water. To study the water and soil pressure response, deformation and stability of the foundation under the action of dynamic confined water. Background technique [0002] In the coastal and riverside areas, not only is the groundwater abundant, but the foundation soil layer is often distributed in interlayers between strong and weakly permeable layers. During engineering, there are often confining layers below the impermeable layer at the bottom of deep foundation pits, and the action of confined water causes The deformation and instability of foundation pits are one of the major risk sources of deep foundation pit engineering in such areas. F...

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Problems solved by technology

[0005] In order to overcome the deficiencies of the prior art above, the present invention provides a foundation model test device for simulating the dynamic changes of confined water, which solves the problem of accurate simulation of the dynamic changes of the confined water in the test, and can be used to study the dynamic changes of the confined water under pressure The interaction between the layer and the overlying impermeable foundation soil, measure the water and soil pressure and deformation of the foundation during the dynamic confined water change process, sort out the relevant test data to determine the stress and deformation development of the foundation under the action of dynamic confined water To explore the influence of the amplitude and rate of dynamic confined water changes on the stability of the foundation, to provide effective test data support for the study of foundation problems caused by dynamic confined water, and to provide a basis for the subsequent theoretical analysis model

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