Vertical well pipe for assisting in efficiently extracting groundwater in low permeable aqueous medium in laboratory and usage method of vertical well pipe

Abstract

The invention discloses a vertical well pipe assisting in efficiently extracting groundwater in a low permeable aqueous medium in a laboratory and a usage method of the vertical well pipe. With an ordinary well pipe improved, a rubber plug with two holes are added on a nozzle, and one hole serves as an air inlet and outlet port while the other hole serves as an insertion hole for an pumping hose. The inner portion of a porous pipe part positioned on the lower portion of the well pipe is of the structure of double layers, and washing cotton is used for filling the inner portion of a cylindrical ring while macroporous membrane is used for being stuck on an inner ring. The outer portion of the porous pipe is distributed with pores unevenly and asymmetrically. When the well pipe is vertically arranged, owing to symmetric distribution, water flow is fast due to the effect of groundwater flow; owing to the asymmetric distribution, cumulative amount in pumping can be increased, flow rate can be reduced, area of the water contact surface is expanded, pressure is increased, and therefore the siphon effect of the hose is improved.

Description

technical field [0001] The invention belongs to the technical field of groundwater systems, and more specifically relates to the technical field of installation and use of vertical well pipes for indoor research devices of groundwater systems. Background technique [0002] Due to the influence of many factors such as site conditions, conditions, equipment, project cost, and convenience, indoor simulation devices are often used to simulate the flow of groundwater in a region to approximate the water quantity and quality of the region, and to conduct water flow and solute analysis. For numerical simulation, it is necessary to sample and analyze the water quality in the aqueous medium during the research. When the aqueous medium is a coarse-grained medium such as coarse sand, use a general small-diameter vertical well pipe (PVC pipe) and a peristaltic pump to pump it out at one time. The amount of water required by the national standard analysis experiment. However, in coastal...

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Problems solved by technology

However, in coastal areas, especially in areas formed by sea reclamation, groundwater aquifers mostly exist in low-permeability media such as Quaternary silty and silty media. It is important to study the water quality and pollution solute migration in such media. It is of great significance for the groundwater system and closely related offshore seawater conditions. However, when carrying out two-dimensional or three-dimensional undisturbed soil water flow and solute migration simulation experiments indoors, it is difficult to use conventional vertical vertical soils due to the very small particles of the medium and poor water-absorbing properties. Pumping water samples to the well pipe for testing brings great difficulty to the research work, and the cost of laying probes is very high. Therefore, it is necessary to invent an economical and applicable vertical well pipe for research use

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