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Full-Text Articles in Geotechnical Engineering
Mechanical Response Characteristics Of Lining Structure Of Pipeline Karst Tunnels In Water-Rich Areas, Hao-Bo Fan, Ding-Kun Zhou, Yong Liu, Yu-Xiang Song, Zheng-Guo Zhu, Yong-Quan Zhu, Xin-Qiang Gao, Jia-Qi Guo
Mechanical Response Characteristics Of Lining Structure Of Pipeline Karst Tunnels In Water-Rich Areas, Hao-Bo Fan, Ding-Kun Zhou, Yong Liu, Yu-Xiang Song, Zheng-Guo Zhu, Yong-Quan Zhu, Xin-Qiang Gao, Jia-Qi Guo
Rock and Soil Mechanics
For the karst tunnel with pipeline cavities in the surrounding rock, it is very easy to accumulate high water pressure in the pipeline cavity due to the influences of heavy rainfall on the surface and groundwater, which will lead to lining cracking, water leakage, and water gushing diseases. To explore the influence of high water pressure on the lining structure, model tests of pipeline karst tunnels under high water pressure were carried out, and the internal force characteristics of tunnel lining under the influence of cavity position and water head height were studied. Based on the test findings, the numerical …
Experimental Study And Numerical Simulation On The Migration And Transformation Mechanism Of Hexavalent Chromium In Contaminated Site, Yong He, Guang Hu, Zhao Zhang, Wei Lou, Yan-Hong Zou, Xing Li, Ke-Neng Zhang
Experimental Study And Numerical Simulation On The Migration And Transformation Mechanism Of Hexavalent Chromium In Contaminated Site, Yong He, Guang Hu, Zhao Zhang, Wei Lou, Yan-Hong Zou, Xing Li, Ke-Neng Zhang
Rock and Soil Mechanics
With the rapid development of global industrialization, the pollution of hexavalent chromium (Cr(Ⅵ)) in soil and groundwater has become increasingly serious. Field investigation and laboratory tests were carried out for the soil polluted by the chromium slag of a ferroalloy plant. The adsorption, infiltration and dispersion experiments were conducted to study the adsorption characteristics and migration mechanism of Cr(Ⅵ) in silty clay. A three-dimensional kinetic mathematical model of Cr(Ⅵ) migration considering convection-dispersion-adsorption was established. The migration and distribution characteristics of Cr(Ⅵ) in groundwater with the pollution source located upstream or downstream of the contaminated site were obtained using the numerical …
Study On Rainfall Infiltration Characteristics Of Unsaturated Fractured Soil Based On Comsol Multiphysics, Xiao-Ping Hou, Heng-Hui Fan
Study On Rainfall Infiltration Characteristics Of Unsaturated Fractured Soil Based On Comsol Multiphysics, Xiao-Ping Hou, Heng-Hui Fan
Rock and Soil Mechanics
A numerical simulation study on the rainfall infiltration characteristics of unsaturated fractured soil was performed based on COMSOL Multiphysics software. By discretizing the fracture and the matrix into finite elements, a discrete fracture-porous medium model was established to fully simulate the fracture flow, matrix flow and fracture–matrix flow exchange in the soil. The upper boundary of the fractured soil was simulated by using the concept of “air element”. This method can describe not only the phenomenon of preferential infiltration for rainwater along the fractures at the beginning of rainfall, but also the phenomenon of rainwater flowing away along the surface …