Test device for simulating karst fissure-pipeline water flow and solute transport law

Abstract

The invention discloses a test device for simulating a karst fissure-pipeline water flow and solute transport law. The test device comprises a rack, wherein the rack is of a fixedly connected square frame structure, a surface karst infiltration box is arranged at the upper part of the rack, pressure monitoring equipment is arranged at the side edge of the rack, the surface karst infiltration box is of a square box structure, the top part of the surface karst infiltration box is of an open structure and is provided with a rainfall simulator, and an axisymmetric irregular slope plate is arrangedat the bottom part of the inner side of the surface karst infiltration box; a preset rock material layer is filled in and covers the top surface of the irregular slope plate; and a plurality of independent cracks and crossed cracks are symmetrically formed in the irregular slope plate. The test device for simulating the karst fissure-pipeline water flow and solute transport law is high in universality, can fully simulate the real structure of each karst fissure-pipeline structure, can carry out a symmetric observation experiment in the experiment process, and facilitates later experiment datacomparison, arrangement and analysis.

Description

technical field [0001] The invention relates to a test device for simulating karst fissure-pipe water flow and solute migration law, belonging to the technical field of water flow and solute migration law experimental equipment. Background technique [0002] Due to the special temporal and spatial changes of karst development, the karst water-bearing medium has strong anisotropy and heterogeneity. The cracks and pipelines developed in the karst area make karst water have characteristics different from groundwater in homogeneous porous media: laminar flow and turbulence. Flow symbiosis, coexistence of pressurized and non-pressurized, local and overall inconsistency of water flow direction, lack of unified regional groundwater level, uneven distribution, etc.; engineering water shortage and drought often exist in karst areas; Due to the fragility of the karst geological environment, the increase in the load of the ash storage yard often triggers a series of chain reactions, su...

AI Technical Summary

Problems solved by technology

The uncertainty of karst water-bearing media and its hydrodynamic characteristics greatly increases the difficulty of controlling karst groundwater engineering environmental problems; for this reason, Chinese patent application number: 201920755851.5 discloses a method for simulating karst fracture-pipe water flow and solute migration laws The test device consists of a frame, with a surface karst zone infiltration box on the upper part of the frame, pressure monitoring equipment on the side of the frame, an open structure on the top of the surface karst zone infiltration box and a rainfall simulator, and a surface karst zone infiltration box. One side of the bottom of the box is connected with a large cracked plate, and the other side is connected with three small cracked plates. The bottom of the small cracked plate is connected with the side of the large cracked plate in a V-shaped structure. For cracks, several piezometric pipe joints are installed on the sides of the large and small cracked plates and the bottom of the infiltration tank in the surface karst zone, but the cracks and pipes are simulated by regularization and planarization, and the solute concentration at each point cannot be monitored , the law obtained by the experiment is quite different from the water flow and solute migration of the substantial structure in nature

Images