Network model for the numerical solution of groundwater flow: Application to partially penetrating retaining structures in geotechnical engineering

Abstract

Based on the network simulation method, a precise numerical model is designed for the 2‐D groundwater flow in porous and isotropic aquifers. If a partially penetrating impervious barrier exists, groundwater will flow downstream circumventing the underground structure. The network model is solved numerically in a circuit simulation free code. Due to the powerful mathematical calculation algorithms implemented in is this type of codes, the provided solutions are quite precise for a relatively small grid size, with practically negligible computing times. The proposed model is applied to illustrative problems, providing hydraulic isopotential and stream lines, showing that as the dam penetration depth increases, the hydraulic gradient downstream decreases, thus reducing the risk of hydraulic failure.

Analysis of the Utility Tunnel Joint's Stress Characteristics Under Well Point Precipitation Conditions

“…An YL [5] conducted an analysis of the impact of water on the tunnel face and perimeter pressure and came to the conclusion that the range of influence of negative pore water pressure increased with decreasing water level. An accurate numerical model for two-dimensional groundwater flow in aquifers was created by Encarnación Martnez-Moreno [6] to study the groundwater flow process near underground constructions. P. Gattinoni [7] examined the harm done to existing underground structures by groundwater during the regional rise of the groundwater table and concluded that the protection of underground structures should be achieved through the coordinated action of multiple schemes.…”