Pipeline dissolution test equipment based on soil internal erosion and test method thereof

Abstract

The invention relates to the technical field of geotechnical engineering, especially to a pipeline dissolution test equipment based on soil internal erosion and test method thereof. The test equipmentcomprises a water supply device, a water collecting device, an erosion generating device, a collecting device, a measuring device and a shooting device. The water collecting device, the erosion generating device and the collecting device have hollow square structures with openings in the tops and are sequentially stacked and overlapped from top to bottom; a glucose pipeline which is vertically arranged is arranged in the middle of an inner cavity of the erosion generating device, and a plurality of moisture content sensors, pore water pressure sensors and displacement sensors are arranged onthe edge of the glucose pipeline. According to the method, a solid foundation is laid for establishing an appropriate model to predict soil settlement and disturbance influence after erosion, and thetest equipment and test method have positive guiding significance in research related to water and soil loss in geotechnical engineering, prevention of harm caused by soil internal erosion in engineering construction, reduction of engineering and non-engineering accidents and the like.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a pipeline dissolution test device and a test method based on internal erosion of soil. Background technique [0002] In recent years, with the rapid development of urban construction, soil erosion disasters related to ground subsidence and pipelines have increased significantly, and urban road subsidence accidents have increased sharply, which has brought greater safety hazards to urban construction. In this regard, relevant scholars have also carried out a lot of work. The research found that due to the seepage of groundwater, some underground minerals were dissolved, degraded or lost soil particles caused by internal erosion, resulting in a large number of hidden cavities and voids in the strata below the road surface. Pipelines change the soil microstructure, thereby affecting the strength and stiffness of the soil, and are the main cause of a series of probl...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a pipeline dissolution test equipment and test method based on the internal erosion of the soil, which can conveniently control the water level height and water flow velocity, and the pipes with different diameters constructed by dissolving soluble substances such as glucose The pipeline effectively simulates the internal erosion process of the soil. After the pipeline starts to dissolve in the test, the disturbance of the surrounding soil around the pipeline and the settlement and deformation of the surrounding soil can be observed, and it is beneficial to record the moisture content, displacement and porosity during the test. Changes in parameters such as water pressure, so that the cause of the test phenomenon and the correlation with each parameter can be analyzed according to the obtained parameters, thus laying a solid foundation for establishing an appropriate model to predict the soil settlement and disturbance after erosion. It has positive guiding significance for the research on water and soil loss in geotechnical engineering, the prevention of damage caused by internal soil erosion in engineering construction, and the reduction of engineering and non-engineering accidents.

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