Retaining wall model testing device and method capable of simulating combined action of dry-wet cycle and groundwater

Abstract

The invention discloses a retaining wall model testing device and method capable of simulating the combined action of dry-wet cycle and groundwater. The device comprises a model box, an evaporation quantity testing system, a temperature controlling system, a rainfall system, a motor controlling system, a bearing transmission system, a groundwater controlling systemand a soil moisture sensor. The post-filling earth material moistening of a retaining wall is achieved through the rainfall system. The internal temperature of the model box is accurately controlled through the temperature controlling system. The evaporation quantity is precisely controlled through the evaporation quantity testing system. The change of moisture migration in the filler is monitored at any time based on the soil moisture sensor. The displacement change of the retaining wall can be measured by a laser displacement sensor. The slow displacement of the retaining wall can be realized by the motor controlling system. The retaining wall model testing device capable of simulating the combined action of dry-wet cycle and groundwater has the reasonable structure and simple operation, can be used for simulating the influence of the post-filler of the retaining wall on the earth pressure of the retaining wall under the action of dry-wet cycle and groundwater, and provides an effective means for engineering designand related model testing research.

Description

Technical field: [0001] The invention relates to a retaining wall test device, in particular to a retaining wall model test device and method capable of realizing dry-wet cycle and groundwater interaction. Background technique: [0002] The filling of the retaining wall filled by rolling is exposed to the natural environment for a long time after the completion of construction. Under the action of various natural external forces, the strength of the soil body will weaken and the deformation will increase, especially due to the dry-wet cycle and groundwater. The most obvious and prominent effect. Filling soil undergoes repeated drying and wetting cycles, that is, a process of alternating changes from unsaturated soil to saturated soil, and the groundwater level also changes continuously during this process, which in turn affects the matrix suction level and strength parameters inside the soil. [0003] In particular, expansive soil is widely distributed in my country, and it...

AI Technical Summary

Problems solved by technology

The existing model test devices lack a device that can simulate the significant impact of rainfall, evaporation and groundwater level changes on the distribution of earth pressure on retaining walls. Therefore, it is necessary to develop such devices to provide a method for engineering design and related model test research. effective means

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