Simulating device for heave deformation of narrow and long foundation ditch under bias pressure and seepage conditions

Abstract

A simulating device for heave deformation of a narrow and long foundation ditch under bias pressure and seepage conditions comprises a model box, a foundation ditch support system, a bias pressure loading system, a water circulation and water level control system and a monitoring system, wherein the model box is filled with rammed soil, a foundation ditch is formed in the rammed soil, the foundation ditch support system is installed in the foundation pit, the bias pressure loading system is installed on the exterior of the model box, the bias pressure loading system applies pressure to the rammed soil on the outer side of the foundation ditch, and the water circulation and water level control system provides water to the rammed soil in the model box, and discharges the water from the bottom of the foundation pit. The simulating device for the heave deformation of the narrow and long foundation ditch under the bias pressure and seepage conditions simulates the seepage conditions by automatically controlling water head differences of the water level height in the model box and the water level height of the inner side of the foundation ditch, can perform real-time control on the pressure magnitude and the pressure applying distance on the soil body on the outer side of the foundation ditch, can conveniently regulate prestress for a retaining wall, and can truly reflect stress conditions of the foundation pit in engineering excavation.

Description

technical field [0001] The invention relates to a simulation device for uplift deformation of a narrow and long foundation pit under the condition of bias pressure and seepage, in particular to a model for excavating the foundation pit under the condition of rich water caused by groundwater seepage and the bias load of the foundation pit Test device; it can be used to simulate the actual foundation pit excavation steps, and simulate the three working conditions of foundation pit stable seepage, bias pressure, and seepage bias pressure coupling; it can monitor the displacement and deformation of the enclosure structure, water and soil pressure during the foundation pit excavation process Changes and excavation completed the soil uplift deformation problem at the bottom of the foundation pit. Background technique [0002] During the excavation of foundation pits in actual engineering, due to the various overloads around or the difference in water head caused by the difference ...

AI Technical Summary

Problems solved by technology

At present, most of the eccentric load model tests are piled with heavy objects, which is time-consuming and laborious, and the adjustability is poor. A lot of time is spent constantly adjusting; in the process of simulating the excavation of the foundation pit, most of the supports are pre-installed, so that it is impossible to truly simulate the force and deformation of the foundation pit during the actual excavation process

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